Import 1.1.80

CREDITS

@@ -32,6 +32,14 @@ N: Krishna Balasubramanian
 E: balasub@cis.ohio-state.edu
 D: Wrote SYS V IPC (part of standard kernel since 0.99.10)
 
+N: Dario Ballabio
+E: dario@milano.europe.dg.com
+D: Author and maintainer of the Ultrastor 14F/34F SCSI driver
+D: Author and maintainer of the EATA ISA/EISA SCSI driver
+S: Data General Corporation
+S: Milano
+S: Italy
+
 N: Arindam Banerji
 E: axb@cse.nd.edu
 D: Contributed ESDI driver routines needed to port LINUX to the PS/2 MCA.
@@ -303,6 +311,16 @@ S: Great Baddow
 S: CM2 8HN
 S: United Kingdom
 
+N: Jochen Hein
+E: Hein@Informatik.TU-Clausthal.de
+D: National Language Support
+D: German Support-Disks for SLS/Slackware called SLT
+D: Linux Internationalization Project
+D: DOSemu
+S: Mohlenweg 19
+S: 34266 Niestetal
+S: Germany
+
 N: Michael Hipp
 E: mhipp@student.uni-tuebingen.de
 D: drivers for the racal ni5210 & ni6510 ethernet-boards
@@ -499,15 +517,10 @@ S: Victoria Park 6100
 S: Australia
 
 N: John A. Martin
-E: jmartin@csc.com
 E: jam@acm.org
 E: j.a.martin@ieee.org
 D: FSSTND contributor
 D: Credit file compilator
-S: Computer Sciences Corporation
-S: 1100 West Street
-S: Laurel, Maryland 20707-3587
-S: USA
 
 N: Kevin E. Martin
 E: martin@cs.unc.edu
@@ -710,6 +723,14 @@ D: HPFS filesystem
 S: Richardson, Texas
 S: USA
 
+N: Scott Snyder
+E: snyder@fnald0.fnal.gov
+D: ATAPI cdrom driver
+S: MS 352, Fermilab
+S: Post Office Box 500
+S: Batavia, Illinois 60510
+S: USA
+
 N: Drew Sullivan
 E: drew@lethe.north.net
 D: iBCS2 developer

Makefile

 VERSION = 1
 PATCHLEVEL = 1
-SUBLEVEL = 79
+SUBLEVEL = 80
 
 ARCH = i386
 

arch/alpha/lib/divide.S

@@ -45,6 +45,8 @@
  *	$28 - compare status
  */
 
+#define halt .long 0
+
 /*
  * Select function type and registers
  */
@@ -66,17 +68,21 @@
  * For 32-bit operations, we need to extend to 64-bit
  */
 #ifdef INTSIZE
-#define function func(lu)
+#define ufunction func(lu)
+#define sfunction func(l)
 #define LONGIFY(x) zapnot x,15,x
+#define SLONGIFY(x) addl x,0,x
 #else
-#define function func(qu)
+#define ufunction func(qu)
+#define sfunction func(q)
 #define LONGIFY(x)
+#define SLONGIFY(x)
 #endif
 
 .set noat
-.globl	function
-.ent	function
-function:
+.globl	ufunction
+.ent	ufunction
+ufunction:
 	subq	$30,32,$30
 	stq	$0, 0($30)
 	stq	$1, 8($30)
@@ -113,4 +119,18 @@ function:
 	ldq	$2, 16($30)
 	addq	$30,32,$30
 	ret	$31,($23),1
-	.end	function
+	.end	ufunction
+
+/*
+ * The "signed" version just does a halt if either of the value is
+ * signed: the kernel shouldn't mess with signed divides anyway (who
+ * knows what way they'll round..)
+ */
+.globl	sfunction
+.ent	sfunction
+sfunction:
+	bis	$24,$25,$28
+	SLONGIFY($28)
+	bge	$28,ufunction
+	halt
+	.end	sfunction

arch/i386/Makefile

@@ -39,8 +39,8 @@ endif
 
 HEAD := arch/i386/kernel/head.o
 
-SUBDIRS := $(SUBDIRS) arch/i386/kernel
-ARCHIVES := arch/i386/kernel/kernel.o $(ARCHIVES)
+SUBDIRS := $(SUBDIRS) arch/i386/kernel arch/i386/mm
+ARCHIVES := arch/i386/kernel/kernel.o arch/i386/mm/mm.o $(ARCHIVES)
 
 ifdef CONFIG_IBCS
 SUBDIRS := $(SUBDIRS) arch/i386/ibcs

arch/i386/config.in

@@ -134,7 +134,7 @@ if [ "$CONFIG_NET_ISA" = "y" ]; then
 	bool 'DEPCA support' CONFIG_DEPCA n
 	bool 'EtherWorks 3 support' CONFIG_EWRK3 n
 	if [ "$CONFIG_NET_ALPHA" = "y" ]; then
-#		bool 'Arcnet support' CONFIG_ARCNET n
+		bool 'Arcnet support' CONFIG_ARCNET n
 		bool 'AT1700 support' CONFIG_AT1700 n
 #		bool 'EtherExpressPro support' CONFIG_EEXPRESS_PRO n
 		bool 'EtherExpress support' CONFIG_EEXPRESS n

arch/i386/kernel/ioport.c

 /*
- *	linux/kernel/ioport.c
+ *	linux/arch/i386/kernel/ioport.c
  *
  * This contains the io-permission bitmap code - written by obz, with changes
  * by Linus.
@@ -11,50 +11,8 @@
 #include <linux/types.h>
 #include <linux/ioport.h>
 
-#define IOTABLE_SIZE 32
-
-typedef struct resource_entry_t {
-	u_long from, num;
-	const char *name;
-	struct resource_entry_t *next;
-} resource_entry_t;
-
-static resource_entry_t iolist = { 0, 0, "", NULL };
-
-static resource_entry_t iotable[IOTABLE_SIZE];
-
-#define _IODEBUG
-
-#ifdef IODEBUG
-static char * ios(unsigned long l)
-{
-	static char str[33] = { '\0' };
-	int i;
-	unsigned long mask;
-
-	for (i = 0, mask = 0x80000000; i < 32; ++i, mask >>= 1)
-		str[i] = (l & mask) ? '1' : '0';
-	return str;
-}
-
-static void dump_io_bitmap(void)
-{
-	int i, j;
-	int numl = sizeof(current->tss.io_bitmap) >> 2;
-
-	for (i = j = 0; j < numl; ++i)
-	{
-		printk("%4d [%3x]: ", 64*i, 64*i);
-		printk("%s ", ios(current->tss.io_bitmap[j++]));
-		if (j < numl)
-			printk("%s", ios(current->tss.io_bitmap[j++]));
-		printk("\n");
-	}
-}
-#endif
-
 /* Set EXTENT bits starting at BASE in BITMAP to value TURN_ON. */
-asmlinkage void set_bitmap(unsigned long *bitmap, short base, short extent, int new_value)
+static void set_bitmap(unsigned long *bitmap, short base, short extent, int new_value)
 {
 	int mask;
 	unsigned long *bitmap_base = bitmap + (base >> 5);
@@ -87,22 +45,6 @@ asmlinkage void set_bitmap(unsigned long *bitmap, short base, short extent, int
 	}
 }
 
-/*
- * This generates the report for /proc/ioports
- */
-int get_ioport_list(char *buf)
-{
-	resource_entry_t *p;
-	int len = 0;
-
-	for (p = iolist.next; (p) && (len < 4000); p = p->next)
-		len += sprintf(buf+len, "%04lx-%04lx : %s\n",
-			   p->from, p->from+p->num-1, p->name);
-	if (p)
-		len += sprintf(buf+len, "4K limit reached!\n");
-	return len;
-}
-
 /*
  * this changes the io permissions bitmap in the current task.
  */
@@ -115,9 +57,6 @@ asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 	if (!suser())
 		return -EPERM;
 
-#ifdef IODEBUG
-	printk("io: from=%d num=%d %s\n", from, num, (turn_on ? "on" : "off"));
-#endif
 	set_bitmap((unsigned long *)current->tss.io_bitmap, from, num, !turn_on);
 	return 0;
 }
@@ -148,99 +87,3 @@ asmlinkage int sys_iopl(long ebx,long ecx,long edx,
 	*(&eflags) = (eflags & 0xffffcfff) | (level << 12);
 	return 0;
 }
-
-/*
- * The workhorse function: find where to put a new entry
- */
-static resource_entry_t *find_gap(resource_entry_t *root,
-				  u_long from, u_long num)
-{
-	unsigned long flags;
-	resource_entry_t *p;
-	
-	if (from > from+num-1)
-		return NULL;
-	save_flags(flags);
-	cli();
-	for (p = root; ; p = p->next) {
-		if ((p != root) && (p->from+p->num-1 >= from)) {
-			p = NULL;
-			break;
-		}
-		if ((p->next == NULL) || (p->next->from > from+num-1))
-			break;
-	}
-	restore_flags(flags);
-	return p;
-}
-
-/*
- * Call this from the device driver to register the ioport region.
- */
-void request_region(unsigned int from, unsigned int num, const char *name)
-{
-	resource_entry_t *p;
-	int i;
-
-	for (i = 0; i < IOTABLE_SIZE; i++)
-		if (iotable[i].num == 0)
-			break;
-	if (i == IOTABLE_SIZE)
-		printk("warning: ioport table is full\n");
-	else {
-		p = find_gap(&iolist, from, num);
-		if (p == NULL)
-			return;
-		iotable[i].name = name;
-		iotable[i].from = from;
-		iotable[i].num = num;
-		iotable[i].next = p->next;
-		p->next = &iotable[i];
-		return;
-	}
-}
-
-/*
- * This is for compatibility with older drivers.
- * It can be removed when all driver call the new function.
- */
-void snarf_region(unsigned int from, unsigned int num)
-{
-	request_region(from,num,"No name given.");
-}
-
-/* 
- * Call this when the device driver is unloaded
- */
-void release_region(unsigned int from, unsigned int num)
-{
-	resource_entry_t *p, *q;
-
-	for (p = &iolist; ; p = q) {
-		q = p->next;
-		if (q == NULL)
-			break;
-		if ((q->from == from) && (q->num == num)) {
-			q->num = 0;
-			p->next = q->next;
-			return;
-		}
-	}
-}
-
-/*
- * Call this to check the ioport region before probing
- */
-int check_region(unsigned int from, unsigned int num)
-{
-	return (find_gap(&iolist, from, num) == NULL) ? -EBUSY : 0;
-}
-
-/* Called from init/main.c to reserve IO ports. */
-void reserve_setup(char *str, int *ints)
-{
-	int i;
-
-	for (i = 1; i < ints[0]; i += 2)
-		request_region(ints[i], ints[i+1], "reserved");
-}

arch/i386/kernel/process.c

@@ -23,6 +23,27 @@
 #include <asm/segment.h>
 #include <asm/system.h>
 
+/*
+ * Tell us the machine setup..
+ */
+char hard_math = 0;		/* set by boot/head.S */
+char x86 = 0;			/* set by boot/head.S to 3 or 4 */
+char x86_model = 0;		/* set by boot/head.S */
+char x86_mask = 0;		/* set by boot/head.S */
+int x86_capability = 0;		/* set by boot/head.S */
+int fdiv_bug = 0;		/* set if Pentium(TM) with FP bug */
+
+char x86_vendor_id[13] = "Unknown";
+
+char ignore_irq13 = 0;		/* set if exception 16 works */
+char wp_works_ok = 0;		/* set if paging hardware honours WP */ 
+char hlt_works_ok = 1;		/* set if the "hlt" instruction works */
+
+/*
+ * Bus types ..
+ */
+int EISA_bus = 0;
+
 asmlinkage void ret_from_sys_call(void) __asm__("ret_from_sys_call");
 
 /*

arch/i386/kernel/ptrace.c

@@ -87,7 +87,7 @@ static unsigned long get_long(struct vm_area_struct * vma, unsigned long addr)
 	unsigned long page;
 
 repeat:
-	page = *PAGE_DIR_OFFSET(vma->vm_task->tss.cr3, addr);
+	page = *PAGE_DIR_OFFSET(vma->vm_task, addr);
 	if (page & PAGE_PRESENT) {
 		page &= PAGE_MASK;
 		page += PAGE_PTR(addr);
@@ -121,7 +121,7 @@ static void put_long(struct vm_area_struct * vma, unsigned long addr,
 	int readonly = 0;
 
 repeat:
-	page = *PAGE_DIR_OFFSET(vma->vm_task->tss.cr3, addr);
+	page = *PAGE_DIR_OFFSET(vma->vm_task, addr);
 	if (page & PAGE_PRESENT) {
 		page &= PAGE_MASK;
 		page += PAGE_PTR(addr);

arch/i386/kernel/traps.c

@@ -311,6 +311,8 @@ void trap_init(void)
 	int i;
 	struct desc_struct * p;
 
+	if (strncmp((char*)0x0FFFD9, "EISA", 4) == 0)
+		EISA_bus = 1;
 	set_call_gate(&default_ldt,lcall7);
 	set_trap_gate(0,&divide_error);
 	set_trap_gate(1,&debug);

arch/i386/mm/Makefile

+#
+# Makefile for the linux i386-specific parts of the memory manager.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definition is now in the main makefile...
+
+.c.o:
+	$(CC) $(CFLAGS) -c $<
+.s.o:
+	$(AS) -o $*.o $<
+.c.s:
+	$(CC) $(CFLAGS) -S $<
+
+OBJS	= fault.o
+
+mm.o: $(OBJS)
+	$(LD) -r -o mm.o $(OBJS)
+
+modules:
+
+dep:
+	$(CPP) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif

arch/i386/mm/fault.c

+/*
+ *  linux/arch/i386/mm/fault.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ */
+
+#include <linux/config.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/head.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+
+#include <asm/system.h>
+#include <asm/segment.h>
+
+extern unsigned long pg0[1024];		/* page table for 0-4MB for everybody */
+
+extern void scsi_mem_init(unsigned long);
+extern void sound_mem_init(void);
+extern void die_if_kernel(char *,struct pt_regs *,long);
+extern void show_net_buffers(void);
+
+/*
+ * Define this if things work differently on a i386 and a i486:
+ * it will (on a i486) warn about kernel memory accesses that are
+ * done without a 'verify_area(VERIFY_WRITE,..)'
+ */
+#undef CONFIG_TEST_VERIFY_AREA
+
+/*
+ * This routine handles page faults.  It determines the address,
+ * and the problem, and then passes it off to one of the appropriate
+ * routines.
+ */
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
+{
+	struct vm_area_struct * vma;
+	unsigned long address;
+	unsigned long page;
+
+	/* get the address */
+	__asm__("movl %%cr2,%0":"=r" (address));
+	for (vma = current->mm->mmap ; ; vma = vma->vm_next) {
+		if (!vma)
+			goto bad_area;
+		if (vma->vm_end > address)
+			break;
+	}
+	if (vma->vm_start <= address)
+		goto good_area;
+	if (!(vma->vm_flags & VM_GROWSDOWN))
+		goto bad_area;
+	if (vma->vm_end - address > current->rlim[RLIMIT_STACK].rlim_cur)
+		goto bad_area;
+	vma->vm_offset -= vma->vm_start - (address & PAGE_MASK);
+	vma->vm_start = (address & PAGE_MASK);
+/*
+ * Ok, we have a good vm_area for this memory access, so
+ * we can handle it..
+ */
+good_area:
+	if (regs->eflags & VM_MASK) {
+		unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
+		if (bit < 32)
+			current->tss.screen_bitmap |= 1 << bit;
+	}
+	if (!(vma->vm_page_prot & PAGE_USER))
+		goto bad_area;
+	if (error_code & PAGE_PRESENT) {
+		if (!(vma->vm_page_prot & (PAGE_RW | PAGE_COW)))
+			goto bad_area;
+#ifdef CONFIG_TEST_VERIFY_AREA
+		if (regs->cs == KERNEL_CS)
+			printk("WP fault at %08x\n", regs->eip);
+#endif
+		do_wp_page(vma, address, error_code);
+		return;
+	}
+	do_no_page(vma, address, error_code);
+	return;
+
+/*
+ * Something tried to access memory that isn't in our memory map..
+ * Fix it, but check if it's kernel or user first..
+ */
+bad_area:
+	if (error_code & PAGE_USER) {
+		current->tss.cr2 = address;
+		current->tss.error_code = error_code;
+		current->tss.trap_no = 14;
+		send_sig(SIGSEGV, current, 1);
+		return;
+	}
+/*
+ * Oops. The kernel tried to access some bad page. We'll have to
+ * terminate things with extreme prejudice.
+ */
+	if (wp_works_ok < 0 && address == TASK_SIZE && (error_code & PAGE_PRESENT)) {
+		wp_works_ok = 1;
+		pg0[0] = PAGE_SHARED;
+		invalidate();
+		printk("This processor honours the WP bit even when in supervisor mode. Good.\n");
+		return;
+	}
+	if ((unsigned long) (address-TASK_SIZE) < PAGE_SIZE) {
+		printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
+		pg0[0] = PAGE_SHARED;
+	} else
+		printk(KERN_ALERT "Unable to handle kernel paging request");
+	printk(" at virtual address %08lx\n",address);
+	__asm__("movl %%cr3,%0" : "=r" (page));
+	printk(KERN_ALERT "current->tss.cr3 = %08lx, %%cr3 = %08lx\n",
+		current->tss.cr3, page);
+	page = ((unsigned long *) page)[address >> 22];
+	printk(KERN_ALERT "*pde = %08lx\n", page);
+	if (page & PAGE_PRESENT) {
+		page &= PAGE_MASK;
+		address &= 0x003ff000;
+		page = ((unsigned long *) page)[address >> PAGE_SHIFT];
+		printk(KERN_ALERT "*pte = %08lx\n", page);
+	}
+	die_if_kernel("Oops", regs, error_code);
+	do_exit(SIGKILL);
+}
+
+/*
+ * BAD_PAGE is the page that is used for page faults when linux
+ * is out-of-memory. Older versions of linux just did a
+ * do_exit(), but using this instead means there is less risk
+ * for a process dying in kernel mode, possibly leaving a inode
+ * unused etc..
+ *
+ * BAD_PAGETABLE is the accompanying page-table: it is initialized
+ * to point to BAD_PAGE entries.
+ *
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+unsigned long __bad_pagetable(void)
+{
+	extern char empty_bad_page_table[PAGE_SIZE];
+
+	__asm__ __volatile__("cld ; rep ; stosl":
+		:"a" (BAD_PAGE + PAGE_TABLE),
+		 "D" ((long) empty_bad_page_table),
+		 "c" (PTRS_PER_PAGE)
+		:"di","cx");
+	return (unsigned long) empty_bad_page_table;
+}
+
+unsigned long __bad_page(void)
+{
+	extern char empty_bad_page[PAGE_SIZE];
+
+	__asm__ __volatile__("cld ; rep ; stosl":
+		:"a" (0),
+		 "D" ((long) empty_bad_page),
+		 "c" (PTRS_PER_PAGE)
+		:"di","cx");
+	return (unsigned long) empty_bad_page;
+}
+
+unsigned long __zero_page(void)
+{
+	extern char empty_zero_page[PAGE_SIZE];
+
+	__asm__ __volatile__("cld ; rep ; stosl":
+		:"a" (0),
+		 "D" ((long) empty_zero_page),
+		 "c" (PTRS_PER_PAGE)
+		:"di","cx");
+	return (unsigned long) empty_zero_page;
+}
+
+void show_mem(void)
+{
+	int i,free = 0,total = 0,reserved = 0;
+	int shared = 0;
+
+	printk("Mem-info:\n");
+	show_free_areas();
+	printk("Free swap:       %6dkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
+	i = high_memory >> PAGE_SHIFT;
+	while (i-- > 0) {
+		total++;
+		if (mem_map[i] & MAP_PAGE_RESERVED)
+			reserved++;
+		else if (!mem_map[i])
+			free++;
+		else
+			shared += mem_map[i]-1;
+	}
+	printk("%d pages of RAM\n",total);
+	printk("%d free pages\n",free);
+	printk("%d reserved pages\n",reserved);
+	printk("%d pages shared\n",shared);
+	show_buffers();
+#ifdef CONFIG_NET
+	show_net_buffers();
+#endif
+}
+
+extern unsigned long free_area_init(unsigned long, unsigned long);
+
+/*
+ * paging_init() sets up the page tables - note that the first 4MB are
+ * already mapped by head.S.
+ *
+ * This routines also unmaps the page at virtual kernel address 0, so
+ * that we can trap those pesky NULL-reference errors in the kernel.
+ */
+unsigned long paging_init(unsigned long start_mem, unsigned long end_mem)
+{
+	unsigned long * pg_dir;
+	unsigned long * pg_table;
+	unsigned long tmp;
+	unsigned long address;
+
+/*
+ * Physical page 0 is special; it's not touched by Linux since BIOS
+ * and SMM (for laptops with [34]86/SL chips) may need it.  It is read
+ * and write protected to detect null pointer references in the
+ * kernel.
+ */
+#if 0
+	memset((void *) 0, 0, PAGE_SIZE);
+#endif
+	start_mem = PAGE_ALIGN(start_mem);
+	address = 0;
+	pg_dir = swapper_pg_dir;
+	while (address < end_mem) {
+		tmp = *(pg_dir + 768);		/* at virtual addr 0xC0000000 */
+		if (!tmp) {
+			tmp = start_mem | PAGE_TABLE;
+			*(pg_dir + 768) = tmp;
+			start_mem += PAGE_SIZE;
+		}
+		*pg_dir = tmp;			/* also map it in at 0x0000000 for init */
+		pg_dir++;
+		pg_table = (unsigned long *) (tmp & PAGE_MASK);
+		for (tmp = 0 ; tmp < PTRS_PER_PAGE ; tmp++,pg_table++) {
+			if (address < end_mem)
+				*pg_table = address | PAGE_SHARED;
+			else
+				*pg_table = 0;
+			address += PAGE_SIZE;
+		}
+	}
+	invalidate();
+	return free_area_init(start_mem, end_mem);
+}
+
+void mem_init(unsigned long start_low_mem,
+	      unsigned long start_mem, unsigned long end_mem)
+{
+	int codepages = 0;
+	int reservedpages = 0;
+	int datapages = 0;
+	unsigned long tmp;
+	extern int etext;
+
+	end_mem &= PAGE_MASK;
+	high_memory = end_mem;
+
+	/* mark usable pages in the mem_map[] */
+	start_low_mem = PAGE_ALIGN(start_low_mem);
+	start_mem = PAGE_ALIGN(start_mem);
+
+	/*
+	 * IBM messed up *AGAIN* in their thinkpad: 0xA0000 -> 0x9F000.
+	 * They seem to have done something stupid with the floppy
+	 * controller as well..
+	 */
+	while (start_low_mem < 0x9f000) {
+		mem_map[MAP_NR(start_low_mem)] = 0;
+		start_low_mem += PAGE_SIZE;
+	}
+
+	while (start_mem < high_memory) {
+		mem_map[MAP_NR(start_mem)] = 0;
+		start_mem += PAGE_SIZE;
+	}
+#ifdef CONFIG_SCSI
+	scsi_mem_init(high_memory);
+#endif
+#ifdef CONFIG_SOUND
+	sound_mem_init();
+#endif
+	for (tmp = 0 ; tmp < high_memory ; tmp += PAGE_SIZE) {
+		if (mem_map[MAP_NR(tmp)]) {
+			if (tmp >= 0xA0000 && tmp < 0x100000)
+				reservedpages++;
+			else if (tmp < (unsigned long) &etext)
+				codepages++;
+			else
+				datapages++;
+			continue;
+		}
+		mem_map[MAP_NR(tmp)] = 1;
+		free_page(tmp);
+	}
+	tmp = nr_free_pages << PAGE_SHIFT;
+	printk("Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data)\n",
+		tmp >> 10,
+		high_memory >> 10,
+		codepages << (PAGE_SHIFT-10),
+		reservedpages << (PAGE_SHIFT-10),
+		datapages << (PAGE_SHIFT-10));
+/* test if the WP bit is honoured in supervisor mode */
+	wp_works_ok = -1;
+	pg0[0] = PAGE_READONLY;
+	invalidate();
+	__asm__ __volatile__("movb 0,%%al ; movb %%al,0": : :"ax", "memory");
+	pg0[0] = 0;
+	invalidate();
+	if (wp_works_ok < 0)
+		wp_works_ok = 0;
+#ifdef CONFIG_TEST_VERIFY_AREA
+	wp_works_ok = 0;
+#endif
+	return;
+}
+
+void si_meminfo(struct sysinfo *val)
+{
+	int i;
+
+	i = high_memory >> PAGE_SHIFT;
+	val->totalram = 0;
+	val->sharedram = 0;
+	val->freeram = nr_free_pages << PAGE_SHIFT;
+	val->bufferram = buffermem;
+	while (i-- > 0)  {
+		if (mem_map[i] & MAP_PAGE_RESERVED)
+			continue;
+		val->totalram++;
+		if (!mem_map[i])
+			continue;
+		val->sharedram += mem_map[i]-1;
+	}
+	val->totalram <<= PAGE_SHIFT;
+	val->sharedram <<= PAGE_SHIFT;
+	return;
+}

drivers/char/console.c

@@ -735,8 +735,8 @@ static void scrdown(int currcons, unsigned int t, unsigned int b)
 
 	if (b > video_num_lines || t >= b)
 		return;
-	d = (unsigned short *) origin+video_size_row*b;
-	s = (unsigned short *) origin+video_size_row*(b-1);
+	d = (unsigned short *) (origin+video_size_row*b);
+	s = (unsigned short *) (origin+video_size_row*(b-1));
 	count = (b-t-1)*video_num_columns;
 	while (count) {
 		count--;

drivers/net/Makefile

@@ -171,6 +171,10 @@ ifdef CONFIG_8390
 NETDRV_OBJS := $(NETDRV_OBJS) 8390.o
 endif
 
+ifdef CONFIG_ARCNET
+NETDRV_OBJS := $(NETDRV_OBJS) arcnet.o
+endif
+
 ifdef CONFIG_PI
 NETDRV_OBJS := $(NETDRV_OBJS) pi2.o
 CONFIG_PI = CONFIG_PI

drivers/net/Space.c

@@ -283,6 +283,14 @@ static struct device ppp0_dev = {
 #define NEXT_DEV (&ppp0_dev)
 #endif   /* PPP */
 
+#ifdef CONFIG_ARCNET
+    extern int arcnet_probe(struct device *dev);
+    static struct device arcnet_dev = {
+	"arc0", 0x0, 0x0, 0x0, 0x0, 0, 0, 0, 0, 0, NEXT_DEV, arcnet_probe, };
+#   undef	NEXT_DEV
+#   define	NEXT_DEV	(&arcnet_dev)
+#endif
+
 #ifdef CONFIG_DUMMY
     extern int dummy_init(struct device *dev);
     static struct device dummy_dev = {

fs/msdos/inode.c

@@ -46,9 +46,8 @@ void msdos_put_inode(struct inode *inode)
 	clear_inode(inode);
 	if (depend) {
 		if (MSDOS_I(depend)->i_old != inode) {
-			printk("Invalid link (0x%X): expected 0x%X, got 0x%X\n",
-			    (int) depend,(int) inode,(int) MSDOS_I(depend)->
-			    i_old);
+			printk("Invalid link (0x%p): expected 0x%p, got 0x%p\n",
+			    depend, inode, MSDOS_I(depend)->i_old);
 			fs_panic(sb,"...");
 			return;
 		}

fs/proc/array.c

@@ -15,7 +15,7 @@
  *                      <middelin@polyware.iaf.nl>
  *
  * Danny ter Haar    :	Some minor additions for cpuinfo
- * <danny@ow.nl>
+ *			<danny@ow.nl>
  *
  * Alessandro Rubini :  profile extension.
  *                      <rubini@ipvvis.unipv.it>
@@ -332,7 +332,7 @@ static unsigned long get_phys_addr(struct task_struct ** p, unsigned long ptr)
 
 	if (!p || !*p || ptr >= TASK_SIZE)
 		return 0;
-	page = *PAGE_DIR_OFFSET((*p)->tss.cr3,ptr);
+	page = *PAGE_DIR_OFFSET(*p,ptr);
 	if (!(page & PAGE_PRESENT))
 		return 0;
 	page &= PAGE_MASK;
@@ -513,7 +513,7 @@ static int get_statm(int pid, char * buffer)
 		return 0;
 	tpag = (*p)->mm->end_code / PAGE_SIZE;
 	if ((*p)->state != TASK_ZOMBIE) {
-	  pagedir = (unsigned long *) (*p)->tss.cr3;
+	  pagedir = PAGE_DIR_OFFSET(*p, 0);
 	  for (i = 0; i < 0x300; ++i) {
 	    if ((ptbl = pagedir[i]) == 0) {
 	      tpag -= PTRS_PER_PAGE;

fs/proc/mem.c

@@ -24,7 +24,8 @@
 
 static int mem_read(struct inode * inode, struct file * file,char * buf, int count)
 {
-	unsigned long addr, pid, cr3;
+	struct task_struct * tsk;
+	unsigned long addr, pid;
 	char *tmp;
 	unsigned long pte, page;
 	int i;
@@ -33,20 +34,20 @@ static int mem_read(struct inode * inode, struct file * file,char * buf, int cou
 		return -EINVAL;
 	pid = inode->i_ino;
 	pid >>= 16;
-	cr3 = 0;
+	tsk = NULL;
 	for (i = 1 ; i < NR_TASKS ; i++)
 		if (task[i] && task[i]->pid == pid) {
-			cr3 = task[i]->tss.cr3;
+			tsk = task[i];
 			break;
 		}
-	if (!cr3)
+	if (!tsk)
 		return -EACCES;
 	addr = file->f_pos;
 	tmp = buf;
 	while (count > 0) {
 		if (current->signal & ~current->blocked)
 			break;
-		pte = *PAGE_DIR_OFFSET(cr3,addr);
+		pte = *PAGE_DIR_OFFSET(tsk,addr);
 		if (!(pte & PAGE_PRESENT))
 			break;
 		pte &= PAGE_MASK;
@@ -72,7 +73,8 @@ static int mem_read(struct inode * inode, struct file * file,char * buf, int cou
 
 static int mem_write(struct inode * inode, struct file * file,char * buf, int count)
 {
-	unsigned long addr, pid, cr3;
+	struct task_struct * tsk;
+	unsigned long addr, pid;
 	char *tmp;
 	unsigned long pte, page;
 	int i;
@@ -82,19 +84,19 @@ static int mem_write(struct inode * inode, struct file * file,char * buf, int co
 	addr = file->f_pos;
 	pid = inode->i_ino;
 	pid >>= 16;
-	cr3 = 0;
+	tsk = NULL;
 	for (i = 1 ; i < NR_TASKS ; i++)
 		if (task[i] && task[i]->pid == pid) {
-			cr3 = task[i]->tss.cr3;
+			tsk = task[i];
 			break;
 		}
-	if (!cr3)
+	if (!tsk)
 		return -EACCES;
 	tmp = buf;
 	while (count > 0) {
 		if (current->signal & ~current->blocked)
 			break;
-		pte = *PAGE_DIR_OFFSET(cr3,addr);
+		pte = *PAGE_DIR_OFFSET(tsk,addr);
 		if (!(pte & PAGE_PRESENT))
 			break;
 		pte &= PAGE_MASK;
@@ -144,21 +146,22 @@ int
 mem_mmap(struct inode * inode, struct file * file,
 	     struct vm_area_struct * vma)
 {
-  unsigned long *src_table, *dest_table, stmp, dtmp, cr3;
+  struct task_struct *tsk;
+  unsigned long *src_table, *dest_table, stmp, dtmp;
   struct vm_area_struct *src_vma = 0;
   int i;
 
   /* Get the source's task information */
 
-  cr3 = 0;
+  tsk = NULL;
   for (i = 1 ; i < NR_TASKS ; i++)
     if (task[i] && task[i]->pid == (inode->i_ino >> 16)) {
-      cr3     = task[i]->tss.cr3;
+      tsk     = task[i];
       src_vma = task[i]->mm->mmap;
       break;
     }
 
-  if (!cr3)
+  if (!tsk)
     return -EACCES;
 
 /* Ensure that we have a valid source area.  (Has to be mmap'ed and
@@ -173,7 +176,7 @@ mem_mmap(struct inode * inode, struct file * file,
     if (!src_vma || (src_vma->vm_flags & VM_SHM))
       return -EINVAL;
 
-    src_table = PAGE_DIR_OFFSET(cr3, stmp);
+    src_table = PAGE_DIR_OFFSET(tsk, stmp);
     if (!*src_table)
       return -EINVAL;
     src_table = (unsigned long *)((*src_table & PAGE_MASK) + PAGE_PTR(stmp));
@@ -197,10 +200,10 @@ mem_mmap(struct inode * inode, struct file * file,
     while (src_vma && stmp > src_vma->vm_end)
       src_vma = src_vma->vm_next;
 
-    src_table = PAGE_DIR_OFFSET(cr3, stmp);
+    src_table = PAGE_DIR_OFFSET(tsk, stmp);
     src_table = (unsigned long *)((*src_table & PAGE_MASK) + PAGE_PTR(stmp));
 
-    dest_table = PAGE_DIR_OFFSET(current->tss.cr3, dtmp);
+    dest_table = PAGE_DIR_OFFSET(current, dtmp);
 
     if (!*dest_table) {
       *dest_table = get_free_page(GFP_KERNEL);

fs/proc/net.c

@@ -42,7 +42,6 @@ static int proc_lookupnet(struct inode *,const char *,int,struct inode **);
 /* the get_*_info() functions are in the net code, and are configured
    in via the standard mechanism... */
 extern int unix_get_info(char *, char **, off_t, int);
-extern int afinet_get_info(char *, char **, off_t, int);
 #ifdef CONFIG_INET
 extern int tcp_get_info(char *, char **, off_t, int);
 extern int udp_get_info(char *, char **, off_t, int);
@@ -52,6 +51,7 @@ extern int rarp_get_info(char *, char **, off_t, int);
 extern int dev_get_info(char *, char **, off_t, int);
 extern int rt_get_info(char *, char **, off_t, int);
 extern int snmp_get_info(char *, char **, off_t, int);
+extern int afinet_get_info(char *, char **, off_t, int);
 extern int ip_acct_procinfo(char *, char **, off_t, int);
 extern int ip_fw_blk_procinfo(char *, char **, off_t, int);
 extern int ip_fw_fwd_procinfo(char *, char **, off_t, int);
@@ -118,6 +118,7 @@ static struct proc_dir_entry net_dir[] = {
 	{ PROC_NET_TCP,		3, "tcp" },
 	{ PROC_NET_UDP,		3, "udp" },
 	{ PROC_NET_SNMP,	4, "snmp" },
+	{ PROC_NET_SOCKSTAT,	8, "sockstat" },
 #ifdef CONFIG_INET_RARP
 	{ PROC_NET_RARP,	4, "rarp"},
 #endif
@@ -145,7 +146,6 @@ static struct proc_dir_entry net_dir[] = {
 	{ PROC_NET_NR,		2, "nr" },
 #endif /* CONFIG_NETROM */
 #endif /* CONFIG_AX25 */
-	{ PROC_NET_SOCKSTAT,	8, "sockstat" },
 	{ 0, 0, NULL }
 };
 
@@ -233,10 +233,10 @@ static int proc_readnet(struct inode * inode, struct file * file,
 			case PROC_NET_UNIX:
 				length = unix_get_info(page,&start,file->f_pos,thistime);
 				break;
+#ifdef CONFIG_INET
 			case PROC_NET_SOCKSTAT:
 				length = afinet_get_info(page,&start,file->f_pos,thistime);
 				break;
-#ifdef CONFIG_INET
 			case PROC_NET_ARP:
 				length = arp_get_info(page,&start,file->f_pos,thistime);
 				break;

include/asm-alpha/dma.h

@@ -73,6 +73,9 @@
 
 #define MAX_DMA_CHANNELS	8
 
+/* The maximum address that we can perform a DMA transfer to on this platform */
+#define MAX_DMA_ADDRESS		0x1000000
+
 /* 8237 DMA controllers */
 #define IO_DMA1_BASE	0x00	/* 8 bit slave DMA, channels 0..3 */
 #define IO_DMA2_BASE	0xC0	/* 16 bit master DMA, ch 4(=slave input)..7 */

include/asm-alpha/page.h

@@ -36,15 +36,33 @@ __asm__ __volatile__( \
 					/* 64-bit machines, beware!  SRB. */
 #define SIZEOF_PTR_LOG2			4
 
-			/* to find an entry in a page-table-directory */
-#define PAGE_DIR_OFFSET(base,address)	((unsigned long*)((base)+\
-  ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)*2&PTR_MASK&~PAGE_MASK)))
-			/* to find an entry in a page-table */
+/* to find an entry in a page-table-directory */
+/*
+ * XXXXX This isn't right: we shouldn't use the ptbr, but the L2 pointer.
+ * This is just for getting it through the compiler right now
+ */
+#define PAGE_DIR_OFFSET(tsk,address) \
+((unsigned long *) ((tsk)->tss.ptbr + ((((unsigned long)(address)) >> 21) & PTR_MASK & ~PAGE_MASK)))
+
+/* to find an entry in a page-table */
 #define PAGE_PTR(address)		\
   ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
-			/* the no. of pointers that fit on a page */
+
+/* the no. of pointers that fit on a page */
 #define PTRS_PER_PAGE			(PAGE_SIZE/sizeof(void*))
 
+/* to set the page-dir */
+/*
+ * XXXXX This isn't right: we shouldn't use the ptbr, but the L2 pointer.
+ * This is just for getting it through the compiler right now
+ */
+#define SET_PAGE_DIR(tsk,pgdir) \
+do { \
+	(tsk)->tss.ptbr = (unsigned long) (pgdir); \
+	if ((tsk) == current) \
+		invalidate(); \
+} while (0)
+
 #endif /* __KERNEL__ */
 
 #endif /* _ALPHA_PAGE_H */

include/asm-alpha/processor.h

@@ -18,9 +18,14 @@
 /*
  * Bus types
  */
-extern int EISA_bus;
+#define EISA_bus 1
 #define MCA_bus 0
 
+/*
+ * The alpha has no problems with write protection
+ */
+#define wp_works_ok 1
+
 struct thread_struct {
 	unsigned long ksp;
 	unsigned long usp;

include/asm-i386/page.h

@@ -27,15 +27,25 @@ __asm__ __volatile__("movl %%cr3,%%eax\n\tmovl %%eax,%%cr3": : :"ax")
 					/* 64-bit machines, beware!  SRB. */
 #define SIZEOF_PTR_LOG2			2
 
-			/* to find an entry in a page-table-directory */
-#define PAGE_DIR_OFFSET(base,address)	((unsigned long*)((base)+\
-  ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)*2&PTR_MASK&~PAGE_MASK)))
-			/* to find an entry in a page-table */
+/* to find an entry in a page-table-directory */
+#define PAGE_DIR_OFFSET(tsk,address) \
+((((unsigned long)(address)) >> 22) + (unsigned long *) (tsk)->tss.cr3)
+
+/* to find an entry in a page-table */
 #define PAGE_PTR(address)		\
-  ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
-			/* the no. of pointers that fit on a page */
+((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
+
+/* the no. of pointers that fit on a page */
 #define PTRS_PER_PAGE			(PAGE_SIZE/sizeof(void*))
 
+/* to set the page-dir */
+#define SET_PAGE_DIR(tsk,pgdir) \
+do { \
+	(tsk)->tss.cr3 = (unsigned long) (pgdir); \
+	if ((tsk) == current) \
+		__asm__ __volatile__("movl %0,%%cr3": :"a" ((tsk)->tss.cr3)); \
+} while (0)
+
 #endif /* __KERNEL__ */
 
 #endif /* _I386_PAGE_H */

include/asm-sparc/vac-ops.h

@@ -8,12 +8,10 @@
    success, 1 on failure.
 */
 
-extern __inline__ int enable_vac()
+extern __inline__ int enable_vac(void)
 {
-  int success;
+  int success=0;
 
-  &success;
-  
   __asm__ __volatile__("lduba [%1] 2, %0\n\t"
 		       "or    %0, 0x10, %0\n\t"
 		       "stba  %0, [%1] 2\n\t"
@@ -28,9 +26,9 @@ extern __inline__ int enable_vac()
    success, 1 on failure.
 */
 
-extern __inline__ int disable_vac()
+extern __inline__ int disable_vac(void)
 {
-  int success;
+  int success=0;
 
   __asm__ __volatile__("lduba [%1] 0x2, %0\n\t"
 			"xor   %0, 0x10, %0\n\t"

include/linux/mm.h

@@ -87,7 +87,7 @@ struct vm_operations_struct {
 	unsigned long (*wppage)(struct vm_area_struct * area, unsigned long address,
 		unsigned long page);
 	void (*swapout)(struct vm_area_struct *,  unsigned long, unsigned long *);
-	unsigned long (*swapin)(struct vm_area_struct *,  unsigned long);
+	unsigned long (*swapin)(struct vm_area_struct *, unsigned long, unsigned long);
 };
 
 extern unsigned long __bad_page(void);
@@ -282,11 +282,7 @@ extern inline long find_in_swap_cache (unsigned long addr)
 #ifdef SWAP_CACHE_INFO
 	swap_cache_find_total++;
 #endif
-	__asm__ __volatile__("xchgl %0,%1"
-		:"=m" (swap_cache[addr >> PAGE_SHIFT]),
-		 "=r" (entry)
-		:"0" (swap_cache[addr >> PAGE_SHIFT]),
-		 "1" (0));
+	entry = (unsigned long) xchg_ptr(swap_cache + (addr >> PAGE_SHIFT), NULL);
 #ifdef SWAP_CACHE_INFO
 	if (entry)
 		swap_cache_find_success++;
@@ -301,11 +297,7 @@ extern inline int delete_from_swap_cache(unsigned long addr)
 #ifdef SWAP_CACHE_INFO
 	swap_cache_del_total++;
 #endif	
-	__asm__ __volatile__("xchgl %0,%1"
-		:"=m" (swap_cache[addr >> PAGE_SHIFT]),
-		 "=r" (entry)
-		:"0" (swap_cache[addr >> PAGE_SHIFT]),
-		 "1" (0));
+	entry = (unsigned long) xchg_ptr(swap_cache + (addr >> PAGE_SHIFT), NULL);
 	if (entry)  {
 #ifdef SWAP_CACHE_INFO
 		swap_cache_del_success++;

include/linux/net.h

@@ -24,6 +24,7 @@
 
 
 #define NSOCKETS	2000		/* Dynamic, this is MAX LIMIT	*/
+#define NSOCKETS_UNIX	128		/* unix domain static limit	*/
 #define NPROTO		16		/* should be enough for now..	*/
 
 

include/linux/shm.h

@@ -50,7 +50,6 @@ struct	shminfo {
    bits 14..8 (SHM_ID) the id of the shared memory segment
    bits 29..15 (SHM_IDX) the index of the page within the shared memory segment
                     (actually only bits 24..15 get used since SHMMAX is so low)
-   bit 31 (SHM_READ_ONLY) flag whether the page belongs to a read-only attach
 */
 
 #define SHM_ID_SHIFT	8
@@ -63,9 +62,7 @@ struct	shminfo {
 #define _SHM_IDX_BITS	15
 #define SHM_IDX_MASK	((1<<_SHM_IDX_BITS)-1)
 
-#define SHM_READ_ONLY	(1<<31)
-
-/* We must have SHM_ID_SHIFT + _SHM_ID_BITS + _SHM_IDX_BITS + 1 <= 32
+/* We must have SHM_ID_SHIFT + _SHM_ID_BITS + _SHM_IDX_BITS <= 32
    and SHMMAX <= (PAGE_SIZE << _SHM_IDX_BITS). */
 
 #define SHMMAX 0x3fa000				/* max shared seg size (bytes) */

init/main.c

@@ -437,8 +437,6 @@ asmlinkage void start_kernel(void)
 	}
 	low_memory_start = PAGE_ALIGN(low_memory_start);
 	memory_start = paging_init(memory_start,memory_end);
-	if (strncmp((char*)0x0FFFD9, "EISA", 4) == 0)
-		EISA_bus = 1;
 	trap_init();
 	init_IRQ();
 	sched_init();

ipc/shm.c

@@ -22,7 +22,7 @@ static int shm_map (struct vm_area_struct *shmd, int remap);
 static void killseg (int id);
 static void shm_open (struct vm_area_struct *shmd);
 static void shm_close (struct vm_area_struct *shmd);
-static unsigned long shm_swap_in (struct vm_area_struct *, unsigned long);
+static unsigned long shm_swap_in (struct vm_area_struct *, unsigned long, unsigned long);
 
 static int shm_tot = 0; /* total number of shared memory pages */
 static int shm_rss = 0; /* number of shared memory pages that are in memory */
@@ -378,12 +378,11 @@ static int shm_map (struct vm_area_struct *shmd, int remap)
 {
 	unsigned long *page_table;
 	unsigned long tmp, shm_sgn;
-	unsigned long page_dir = shmd->vm_task->tss.cr3;
 
 	/* check that the range is unmapped */
 	if (!remap)
 		for (tmp = shmd->vm_start; tmp < shmd->vm_end; tmp += PAGE_SIZE) {
-			page_table = PAGE_DIR_OFFSET(page_dir,tmp);
+			page_table = PAGE_DIR_OFFSET(shmd->vm_task,tmp);
 			if (*page_table & PAGE_PRESENT) {
 				page_table = (ulong *) (PAGE_MASK & *page_table);
 				page_table += ((tmp >> PAGE_SHIFT) & (PTRS_PER_PAGE-1));
@@ -403,7 +402,7 @@ static int shm_map (struct vm_area_struct *shmd, int remap)
 
 	/* check that the range has page_tables */
 	for (tmp = shmd->vm_start; tmp < shmd->vm_end; tmp += PAGE_SIZE) {
-		page_table = PAGE_DIR_OFFSET(page_dir,tmp);
+		page_table = PAGE_DIR_OFFSET(shmd->vm_task,tmp);
 		if (*page_table & PAGE_PRESENT) {
 			page_table = (ulong *) (PAGE_MASK & *page_table);
 			page_table += ((tmp >> PAGE_SHIFT) & (PTRS_PER_PAGE-1));
@@ -429,7 +428,7 @@ static int shm_map (struct vm_area_struct *shmd, int remap)
 	shm_sgn = shmd->vm_pte + ((shmd->vm_offset >> PAGE_SHIFT) << SHM_IDX_SHIFT);
 	for (tmp = shmd->vm_start; tmp < shmd->vm_end; tmp += PAGE_SIZE,
 	     shm_sgn += (1 << SHM_IDX_SHIFT)) {
-		page_table = PAGE_DIR_OFFSET(page_dir,tmp);
+		page_table = PAGE_DIR_OFFSET(shmd->vm_task,tmp);
 		page_table = (ulong *) (PAGE_MASK & *page_table);
 		page_table += (tmp >> PAGE_SHIFT) & (PTRS_PER_PAGE-1);
 		*page_table = shm_sgn;
@@ -496,8 +495,7 @@ int sys_shmat (int shmid, char *shmaddr, int shmflg, ulong *raddr)
 		return -EIDRM;
 	}
 
-	shmd->vm_pte = (SHM_SWP_TYPE << 1) | (id << SHM_ID_SHIFT) |
-		(shmflg & SHM_RDONLY ? SHM_READ_ONLY : 0);
+	shmd->vm_pte = (SHM_SWP_TYPE << 1) | (id << SHM_ID_SHIFT);
 	shmd->vm_start = addr;
 	shmd->vm_end = addr + shp->shm_npages * PAGE_SIZE;
 	shmd->vm_task = current;
@@ -604,30 +602,40 @@ int sys_shmdt (char *shmaddr)
 /*
  * page not present ... go through shm_pages
  */
-static unsigned long shm_swap_in(struct vm_area_struct * vma, unsigned long code)
+static unsigned long shm_swap_in(struct vm_area_struct * shmd, unsigned long offset, unsigned long code)
 {
 	unsigned long page;
 	struct shmid_ds *shp;
 	unsigned int id, idx;
 
 	id = (code >> SHM_ID_SHIFT) & SHM_ID_MASK;
+	if (id != ((shmd->vm_pte >> SHM_ID_SHIFT) & SHM_ID_MASK)) {
+		printk ("shm_swap_in: code id = %d and shmd id = %ld differ\n",
+			id, (shmd->vm_pte >> SHM_ID_SHIFT) & SHM_ID_MASK);
+		return BAD_PAGE | PAGE_SHARED;
+	}
 	if (id > max_shmid) {
-		printk ("shm_no_page: id=%d too big. proc mem corrupted\n", id);
+		printk ("shm_swap_in: id=%d too big. proc mem corrupted\n", id);
 		return BAD_PAGE | PAGE_SHARED;
 	}
 	shp = shm_segs[id];
 	if (shp == IPC_UNUSED || shp == IPC_NOID) {
-		printk ("shm_no_page: id=%d invalid. Race.\n", id);
+		printk ("shm_swap_in: id=%d invalid. Race.\n", id);
 		return BAD_PAGE | PAGE_SHARED;
 	}
 	idx = (code >> SHM_IDX_SHIFT) & SHM_IDX_MASK;
+	if (idx != (offset >> PAGE_SHIFT)) {
+		printk ("shm_swap_in: code idx = %u and shmd idx = %lu differ\n",
+			idx, offset >> PAGE_SHIFT);
+		return BAD_PAGE | PAGE_SHARED;
+	}
 	if (idx >= shp->shm_npages) {
-		printk ("shm_no_page : too large page index. id=%d\n", id);
+		printk ("shm_swap_in : too large page index. id=%d\n", id);
 		return BAD_PAGE | PAGE_SHARED;
 	}
 
 	if (!(shp->shm_pages[idx] & PAGE_PRESENT)) {
-		if(!(page = get_free_page(GFP_KERNEL))) {
+		if (!(page = get_free_page(GFP_KERNEL))) {
 			oom(current);
 			return BAD_PAGE | PAGE_SHARED;
 		}
@@ -652,8 +660,7 @@ static unsigned long shm_swap_in(struct vm_area_struct * vma, unsigned long code
 done:
 	current->mm->min_flt++;
 	page = shp->shm_pages[idx];
-	if (code & SHM_READ_ONLY)           /* write-protect */
-		page &= ~PAGE_RW;
+	page &= ~(PAGE_RW & ~shmd->vm_page_prot);  /* write-protect */
 	mem_map[MAP_NR(page)]++;
 	return page;
 }
@@ -716,7 +723,7 @@ int shm_swap (int prio)
 		tmp = shmd->vm_start + (idx << PAGE_SHIFT) - shmd->vm_offset;
 		if (!(tmp >= shmd->vm_start && tmp < shmd->vm_end))
 			continue;
-		pte = PAGE_DIR_OFFSET(shmd->vm_task->tss.cr3,tmp);
+		pte = PAGE_DIR_OFFSET(shmd->vm_task,tmp);
 		if (!(*pte & PAGE_PRESENT)) {
 			printk("shm_swap: bad pgtbl! id=%ld start=%lx idx=%ld\n",
 					id, shmd->vm_start, idx);
@@ -732,8 +739,7 @@ int shm_swap (int prio)
 			*pte &= ~PAGE_ACCESSED;
 			continue;
 		}
-		tmp = shmd->vm_pte | idx << SHM_IDX_SHIFT;
-		*pte = tmp;
+		*pte = shmd->vm_pte | idx << SHM_IDX_SHIFT;
 		mem_map[MAP_NR(page)]--;
 		shmd->vm_task->mm->rss--;
 		invalid++;

kernel/Makefile

@@ -17,7 +17,8 @@
 	$(CC) $(CFLAGS) -c $<
 
 OBJS  = sched.o dma.o fork.o exec_domain.o panic.o printk.o vsprintf.o sys.o \
-	module.o ksyms.o exit.o signal.o itimer.o info.o time.o softirq.o
+	module.o ksyms.o exit.o signal.o itimer.o info.o time.o softirq.o \
+	resource.o
 
 all: kernel.o
 

kernel/fork.c

@@ -169,13 +169,18 @@ asmlinkage int sys_fork(struct pt_regs regs)
 {
 	int nr;
 	struct task_struct *p;
+	unsigned long new_stack;
 	unsigned long clone_flags = COPYVM | SIGCHLD;
 
 	if(!(p = (struct task_struct*)__get_free_page(GFP_KERNEL)))
 		goto bad_fork;
+	new_stack = get_free_page(GFP_KERNEL);
+	if (!new_stack)
+		goto bad_fork_free;
 	nr = find_empty_process();
 	if (nr < 0)
 		goto bad_fork_free;
+
 	*p = *current;
 
 	if (p->exec_domain && p->exec_domain->use_count)
@@ -184,7 +189,8 @@ asmlinkage int sys_fork(struct pt_regs regs)
 		(*p->binfmt->use_count)++;
 
 	p->did_exec = 0;
-	p->kernel_stack_page = 0;
+	p->kernel_stack_page = new_stack;
+	*(unsigned long *) p->kernel_stack_page = STACK_MAGIC;
 	p->state = TASK_UNINTERRUPTIBLE;
 	p->flags &= ~(PF_PTRACED|PF_TRACESYS);
 	p->pid = last_pid;
@@ -201,11 +207,6 @@ asmlinkage int sys_fork(struct pt_regs regs)
 	p->start_time = jiffies;
 	task[nr] = p;
 
-	/* build new kernel stack */
-	if (!(p->kernel_stack_page = get_free_page(GFP_KERNEL)))
-		goto bad_fork_cleanup;
-	*(unsigned long *)p->kernel_stack_page = STACK_MAGIC;
-
 	/* copy all the process information */
 	clone_flags = copy_thread(nr, COPYVM | SIGCHLD, p, &regs);
 	if (copy_mm(clone_flags, p))
@@ -222,8 +223,8 @@ asmlinkage int sys_fork(struct pt_regs regs)
 bad_fork_cleanup:
 	task[nr] = NULL;
 	REMOVE_LINKS(p);
-	free_page(p->kernel_stack_page);
 bad_fork_free:
+	free_page(new_stack);
 	free_page((long) p);
 bad_fork:
 	return -EAGAIN;

kernel/ksyms.c

@@ -69,8 +69,14 @@ struct symbol_table symbol_table = { 0, 0, 0, /* for stacked module support */
 	X(rename_module_symbol),
 
 	/* system info variables */
+	/* These check that they aren't defines (0/1) */
+#ifndef EISA_bus
 	X(EISA_bus),
-#ifdef __i386__
+#endif
+#ifndef MCA_bus
+	X(MCA_bus),
+#endif
+#ifndef wp_works_ok
 	X(wp_works_ok),
 #endif
 
@@ -282,11 +288,13 @@ struct symbol_table symbol_table = { 0, 0, 0, /* for stacked module support */
 	X(__down),
 #if defined(CONFIG_MSDOS_FS) && !defined(CONFIG_UMSDOS_FS)
 	/* support for umsdos fs */
+	X(msdos_bmap),
 	X(msdos_create),
 	X(msdos_file_read),
 	X(msdos_file_write),
 	X(msdos_lookup),
 	X(msdos_mkdir),
+	X(msdos_mmap),
 	X(msdos_put_inode),
 	X(msdos_put_super),
 	X(msdos_read_inode),

kernel/resource.c

+/*
+ *	linux/kernel/resource.c
+ *
+ * Copyright (C) 1995	Linus Torvalds
+ *			David Hinds
+ *
+ * Kernel io-region resource management
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+
+#define IOTABLE_SIZE 32
+
+typedef struct resource_entry_t {
+	u_long from, num;
+	const char *name;
+	struct resource_entry_t *next;
+} resource_entry_t;
+
+static resource_entry_t iolist = { 0, 0, "", NULL };
+
+static resource_entry_t iotable[IOTABLE_SIZE];
+
+/*
+ * This generates the report for /proc/ioports
+ */
+int get_ioport_list(char *buf)
+{
+	resource_entry_t *p;
+	int len = 0;
+
+	for (p = iolist.next; (p) && (len < 4000); p = p->next)
+		len += sprintf(buf+len, "%04lx-%04lx : %s\n",
+			   p->from, p->from+p->num-1, p->name);
+	if (p)
+		len += sprintf(buf+len, "4K limit reached!\n");
+	return len;
+}
+
+/*
+ * The workhorse function: find where to put a new entry
+ */
+static resource_entry_t *find_gap(resource_entry_t *root,
+				  u_long from, u_long num)
+{
+	unsigned long flags;
+	resource_entry_t *p;
+	
+	if (from > from+num-1)
+		return NULL;
+	save_flags(flags);
+	cli();
+	for (p = root; ; p = p->next) {
+		if ((p != root) && (p->from+p->num-1 >= from)) {
+			p = NULL;
+			break;
+		}
+		if ((p->next == NULL) || (p->next->from > from+num-1))
+			break;
+	}
+	restore_flags(flags);
+	return p;
+}
+
+/*
+ * Call this from the device driver to register the ioport region.
+ */
+void request_region(unsigned int from, unsigned int num, const char *name)
+{
+	resource_entry_t *p;
+	int i;
+
+	for (i = 0; i < IOTABLE_SIZE; i++)
+		if (iotable[i].num == 0)
+			break;
+	if (i == IOTABLE_SIZE)
+		printk("warning: ioport table is full\n");
+	else {
+		p = find_gap(&iolist, from, num);
+		if (p == NULL)
+			return;
+		iotable[i].name = name;
+		iotable[i].from = from;
+		iotable[i].num = num;
+		iotable[i].next = p->next;
+		p->next = &iotable[i];
+		return;
+	}
+}
+
+/*
+ * This is for compatibility with older drivers.
+ * It can be removed when all driver call the new function.
+ */
+void snarf_region(unsigned int from, unsigned int num)
+{
+	request_region(from,num,"No name given.");
+}
+
+/* 
+ * Call this when the device driver is unloaded
+ */
+void release_region(unsigned int from, unsigned int num)
+{
+	resource_entry_t *p, *q;
+
+	for (p = &iolist; ; p = q) {
+		q = p->next;
+		if (q == NULL)
+			break;
+		if ((q->from == from) && (q->num == num)) {
+			q->num = 0;
+			p->next = q->next;
+			return;
+		}
+	}
+}
+
+/*
+ * Call this to check the ioport region before probing
+ */
+int check_region(unsigned int from, unsigned int num)
+{
+	return (find_gap(&iolist, from, num) == NULL) ? -EBUSY : 0;
+}
+
+/* Called from init/main.c to reserve IO ports. */
+void reserve_setup(char *str, int *ints)
+{
+	int i;
+
+	for (i = 1; i < ints[0]; i += 2)
+		request_region(ints[i], ints[i+1], "reserved");
+}

kernel/sched.c

@@ -65,27 +65,6 @@ long time_adjust_step = 0;
 int need_resched = 0;
 unsigned long event = 0;
 
-/*
- * Tell us the machine setup..
- */
-char hard_math = 0;		/* set by boot/head.S */
-char x86 = 0;			/* set by boot/head.S to 3 or 4 */
-char x86_model = 0;		/* set by boot/head.S */
-char x86_mask = 0;		/* set by boot/head.S */
-int x86_capability = 0;		/* set by boot/head.S */
-int fdiv_bug = 0;		/* set if Pentium(TM) with FP bug */
-
-char x86_vendor_id[13] = "Unknown";
-
-char ignore_irq13 = 0;		/* set if exception 16 works */
-char wp_works_ok = 0;		/* set if paging hardware honours WP */ 
-char hlt_works_ok = 1;		/* set if the "hlt" instruction works */
-
-/*
- * Bus types ..
- */
-int EISA_bus = 0;
-
 extern int _setitimer(int, struct itimerval *, struct itimerval *);
 unsigned long * prof_buffer = NULL;
 unsigned long prof_len = 0;
@@ -494,7 +473,7 @@ static void second_overflow(void)
 		time_status = TIME_OK;
 		break;
 	}
-	if (xtime.tv_sec > last_rtc_update + 660)
+	if (time_status != TIME_BAD && xtime.tv_sec > last_rtc_update + 660)
 	  if (set_rtc_mmss(xtime.tv_sec) == 0)
 	    last_rtc_update = xtime.tv_sec;
 	  else

lib/string.c

@@ -201,7 +201,7 @@ int memcmp(const void * cs,const void * ct,size_t count)
 /*
  * find the first occurrence of byte 'c', or 1 past the area if none
  */
-extern inline void * memscan(void * addr, unsigned char c, size_t size)
+void * memscan(void * addr, unsigned char c, size_t size)
 {
 	unsigned char * p = (unsigned char *) addr;
 

mm/filemap.c

@@ -90,7 +90,7 @@ static void file_mmap_sync(struct vm_area_struct * vma, unsigned long start,
 	unsigned long poff, pcnt, pc;
 
 	size = size >> PAGE_SHIFT;
-	dir = PAGE_DIR_OFFSET(current->tss.cr3,start);
+	dir = PAGE_DIR_OFFSET(current,start);
 	poff = (start >> PAGE_SHIFT) & (PTRS_PER_PAGE-1);
 	start -= vma->vm_start;
 	if ((pcnt = PTRS_PER_PAGE - poff) > size)

mm/mprotect.c

@@ -24,7 +24,7 @@ static void change_protection(unsigned long start, unsigned long end, int prot)
 	unsigned long page, offset;
 	int nr;
 
-	dir = PAGE_DIR_OFFSET(current->tss.cr3, start);
+	dir = PAGE_DIR_OFFSET(current, start);
 	offset = (start >> PAGE_SHIFT) & (PTRS_PER_PAGE-1);
 	nr = (end - start) >> PAGE_SHIFT;
 	while (nr > 0) {

mm/swap.c

@@ -77,14 +77,8 @@ extern inline int add_to_swap_cache(unsigned long addr, unsigned long entry)
 #ifdef SWAP_CACHE_INFO
 	swap_cache_add_total++;
 #endif
-	if ((p->flags & SWP_WRITEOK) == SWP_WRITEOK) { 
-		__asm__ __volatile__ (
-				      "xchgl %0,%1\n"
-				      : "=m" (swap_cache[addr >> PAGE_SHIFT]),
-				       "=r" (entry)
-				      : "0" (swap_cache[addr >> PAGE_SHIFT]),
-				       "1" (entry)
-				      );
+	if ((p->flags & SWP_WRITEOK) == SWP_WRITEOK) {
+		entry = (unsigned long) xchg_ptr(swap_cache + (addr >> PAGE_SHIFT), (void *) entry);
 		if (entry)  {
 			printk("swap_cache: replacing non-NULL entry\n");
 		}
@@ -398,7 +392,7 @@ static int swap_out_process(struct task_struct * p)
 	if (address < vma->vm_start)
 		address = vma->vm_start;
 
-	pgdir = (address >> PGDIR_SHIFT) + (unsigned long *) p->tss.cr3;
+	pgdir = PAGE_DIR_OFFSET(p, address);
 	offset = address & ~PGDIR_MASK;
 	address &= PGDIR_MASK;
 	for ( ; address < TASK_SIZE ;
@@ -754,7 +748,7 @@ static int try_to_unuse(unsigned int type)
 		if (!p)
 			continue;
 		for (pgt = 0 ; pgt < PTRS_PER_PAGE ; pgt++) {
-			ppage = pgt + ((unsigned long *) p->tss.cr3);
+			ppage = pgt + PAGE_DIR_OFFSET(p, 0);
 			page = *ppage;
 			if (!page)
 				continue;

mm/vmalloc.c

@@ -39,7 +39,7 @@ static inline void set_pgdir(unsigned long dindex, unsigned long value)
 
 	p = &init_task;
 	do {
-		((unsigned long *) p->tss.cr3)[dindex] = value;
+		PAGE_DIR_OFFSET(p,0)[dindex] = value;
 		p = p->next_task;
 	} while (p != &init_task);
 }

net/inet/arp.c

@@ -580,7 +580,9 @@ int arp_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt)
 			break;
 #endif
 		case ARPHRD_ETHER:
+#ifdef CONFIG_ARCNET
 		case ARPHRD_ARCNET:
+#endif
 			if(arp->ar_pro != htons(ETH_P_IP))
 			{
 				kfree_skb(skb, FREE_READ);
@@ -1054,10 +1056,12 @@ static int arp_req_set(struct arpreq *req)
 			htype = ARPHRD_ETHER;
 			hlen = ETH_ALEN;
 			break;
+#ifdef CONFIG_ARCNET
 		case ARPHRD_ARCNET:
 			htype = ARPHRD_ARCNET;
 			hlen = 1;	/* length of arcnet addresses */
 			break;
+#endif
 #ifdef CONFIG_AX25
 		case ARPHRD_AX25:
 			htype = ARPHRD_AX25;

net/inet/sock.h

@@ -91,7 +91,7 @@ struct sock {
   unsigned long		        lingertime;
   int				proc;
   struct sock			*next;
-  struct sock			*prev; /* Doubdly linked chain.. */
+  struct sock			*prev; /* Doubly linked chain.. */
   struct sock			*pair;
   struct sk_buff		* volatile send_head;
   struct sk_buff		* volatile send_tail;

net/socket.c

@@ -287,7 +287,6 @@ static struct socket *sock_alloc(int wait)
 				++nsockets;
 			}
 			sti();
-printk("sock_alloc: Alloced some more, now %d sockets\n", nsockets);
 		}
 
 
@@ -367,7 +366,7 @@ printk("sock_alloc: Alloced some more, now %d sockets\n", nsockets);
 		sti();
 
 		/*
-		 * The rest of these are in fact vestigal from the previous
+		 * The rest of these are in fact vestigial from the previous
 		 * version, which didn't have growing list of sockets.
 		 * These may become necessary if there are 2000 (or whatever
 		 * the hard limit is set to) sockets already in system,
@@ -979,7 +978,7 @@ static int sock_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_addrl
 	if (!(newsock = sock_alloc(0))) 
 	{
 		printk("NET: sock_accept: no more sockets\n");
-		return(-ENOSR);	/* Was: EGAIN, but we are out of system
+		return(-ENOSR);	/* Was: EAGAIN, but we are out of system
 				   resources! */
 	}
 	newsock->type = sock->type;

net/unix/sock.c

@@ -55,7 +55,7 @@
  *	space that need not be wasted.
  */
  
-struct unix_proto_data unix_datas[NSOCKETS];
+struct unix_proto_data unix_datas[NSOCKETS_UNIX];
 
 static int unix_proto_create(struct socket *sock, int protocol);
 static int unix_proto_dup(struct socket *newsock, struct socket *oldsock);

net/unix/unix.h

@@ -43,10 +43,10 @@ struct unix_proto_data {
 	int		lock_flag;
 };
 
-extern struct unix_proto_data unix_datas[NSOCKETS];
+extern struct unix_proto_data unix_datas[NSOCKETS_UNIX];
 
 
-#define last_unix_data		(unix_datas + NSOCKETS - 1)
+#define last_unix_data		(unix_datas + NSOCKETS_UNIX - 1)
 
 
 #define UN_DATA(SOCK) 		((struct unix_proto_data *)(SOCK)->data)