Merge bk://linux-input.bkbits.net/linux-input

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux

Documentation/filesystems/devfs/ChangeLog

@@ -1957,3 +1957,11 @@ Changes for patch v216
   <devfs_get_handle>
 
 - Removed deprecated <devfs_find_handle>
+===============================================================================
+Changes for patch v217
+
+- Exported <devfs_find_and_unregister> and <devfs_only> to modules
+
+- Updated README from master HTML file
+
+- Fixed module unload race in <devfs_open>

Documentation/filesystems/devfs/README

@@ -3,7 +3,7 @@ Devfs (Device File System) FAQ
 
 Linux Devfs (Device File System) FAQ
 Richard Gooch
-21-JUL-2002
+20-AUG-2002
 
 
 Document languages:
@@ -1509,6 +1509,16 @@ Here are some common questions and answers.
 
 
 
+Devfsd doesn't start
+
+Make sure you have compiled and installed devfsd
+Make sure devfsd is being started from your boot
+scripts
+Make sure you have configured your kernel to enable devfs (see
+below)
+Make sure devfs is mounted (see below)
+
+
 Devfsd is not managing all my permissions
 
 Make sure you are capturing the appropriate events. For example,
@@ -1777,7 +1787,7 @@ I hate the naming scheme
 First, remember that no naming scheme will please everybody. You hate
 the scheme, others love it. Who's to say who's right and who's wrong?
 Ultimately, the person who writes the code gets to choose, and what
-exists now is a combination of the the choices made by the
+exists now is a combination of the choices made by the
 devfs author and the
 kernel maintainer (Linus).
 

Documentation/preempt-locking.txt

 		  Proper Locking Under a Preemptible Kernel:
 		       Keeping Kernel Code Preempt-Safe
 			 Robert Love <rml@tech9.net>
-			   Last Updated: 22 Jan 2002
+			  Last Updated: 28 Aug 2002
 
 
 INTRODUCTION
@@ -112,3 +112,24 @@ critical variables.  Another example:
 
 This code is not preempt-safe, but see how easily we can fix it by simply
 moving the spin_lock up two lines.
+
+
+PREVENTING PREEMPTION USING INTERRUPT DISABLING
+
+
+It is possible to prevent a preemption event using local_irq_disable and
+local_irq_save.  Note, when doing so, you must be very careful to not cause
+an event that would set need_resched and result in a preemption check.  When
+in doubt, rely on locking or explicit preemption disabling.
+
+Note in 2.5 interrupt disabling is now only per-CPU (e.g. local).
+
+An additional concern is proper usage of local_irq_disable and local_irq_save.
+These may be used to protect from preemption, however, on exit, if preemption
+may be enabled, a test to see if preemption is required should be done.  If
+these are called from the spin_lock and read/write lock macros, the right thing
+is done.  They may also be called within a spin-lock protected region, however,
+if they are ever called outside of this context, a test for preemption should
+be made. Do note that calls from interrupt context or bottom half/ tasklets
+are also protected by preemption locks and so may use the versions which do
+not check preemption.

arch/i386/kernel/ioport.c

@@ -55,12 +55,16 @@ static void set_bitmap(unsigned long *bitmap, short base, short extent, int new_
 asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 {
 	struct thread_struct * t = &current->thread;
-	struct tss_struct * tss = init_tss + smp_processor_id();
+	struct tss_struct * tss;
+	int ret = 0;
 
 	if ((from + num <= from) || (from + num > IO_BITMAP_SIZE*32))
 		return -EINVAL;
 	if (turn_on && !capable(CAP_SYS_RAWIO))
 		return -EPERM;
+
+	tss = init_tss + get_cpu();
+
 	/*
 	 * If it's the first ioperm() call in this thread's lifetime, set the
 	 * IO bitmap up. ioperm() is much less timing critical than clone(),
@@ -69,8 +73,11 @@ asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 	if (!t->ts_io_bitmap) {
 		unsigned long *bitmap;
 		bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
-		if (!bitmap)
-			return -ENOMEM;
+		if (!bitmap) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
 		/*
 		 * just in case ...
 		 */
@@ -88,7 +95,9 @@ asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 	set_bitmap(t->ts_io_bitmap, from, num, !turn_on);
 	set_bitmap(tss->io_bitmap, from, num, !turn_on);
 
-	return 0;
+out:
+	put_cpu();
+	return ret;
 }
 
 /*

drivers/char/Config.help

@@ -985,9 +985,10 @@ CONFIG_H8
 CONFIG_NVRAM
   If you say Y here and create a character special file /dev/nvram
   with major number 10 and minor number 144 using mknod ("man mknod"),
-  you get read and write access to the 50 bytes of non-volatile memory
-  in the real time clock (RTC), which is contained in every PC and
-  most Ataris.
+  you get read and write access to the extra bytes of non-volatile
+  memory in the real time clock (RTC), which is contained in every PC
+  and most Ataris.  The actual number of bytes varies, depending on the
+  nvram in the system, but is usually 114 (128-14 for the RTC).
 
   This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
   on Ataris. /dev/nvram may be used to view settings there, or to

drivers/char/Makefile

@@ -15,7 +15,7 @@ obj-y	 += mem.o tty_io.o n_tty.o tty_ioctl.o pty.o misc.o random.o
 export-objs     :=	busmouse.o console.o keyboard.o sysrq.o \
 			misc.o pty.o random.o selection.o \
 			sonypi.o tty_io.o tty_ioctl.o generic_serial.o rtc.o \
-			ip2main.o
+			ip2main.o nvram.o
 
 obj-$(CONFIG_VT) += vt.o vc_screen.o consolemap.o consolemap_deftbl.o selection.o keyboard.o
 obj-$(CONFIG_HW_CONSOLE) += console.o defkeymap.o

drivers/char/nvram.c

@@ -3,6 +3,7 @@
  *
  * Copyright (C) 1997 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
  * idea by and with help from Richard Jelinek <rj@suse.de>
+ * Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
  *
  * This driver allows you to access the contents of the non-volatile memory in
  * the mc146818rtc.h real-time clock. This chip is built into all PCs and into
@@ -10,8 +11,9 @@
  * "NVRAM" (NV stands for non-volatile).
  *
  * The data are supplied as a (seekable) character device, /dev/nvram. The
- * size of this file is 50, the number of freely available bytes in the memory
- * (i.e., not used by the RTC itself).
+ * size of this file is dependant on the controller.  The usual size is 114,
+ * the number of freely available bytes in the memory (i.e., not used by the
+ * RTC itself).
  *
  * Checksums over the NVRAM contents are managed by this driver. In case of a
  * bad checksum, reads and writes return -EIO. The checksum can be initialized
@@ -28,25 +30,35 @@
  *
  * 	1.1	Cesar Barros: SMP locking fixes
  * 		added changelog
+ * 	1.2	Erik Gilling: Cobalt Networks support
+ * 		Tim Hockin: general cleanup, Cobalt support
  */
 
-#define NVRAM_VERSION		"1.1"
+#define NVRAM_VERSION	"1.2"
 
 #include <linux/module.h>
 #include <linux/config.h>
 #include <linux/sched.h>
 #include <linux/smp_lock.h>
+#include <linux/nvram.h>
 
 #define PC		1
 #define ATARI		2
+#define COBALT		3
 
 /* select machine configuration */
 #if defined(CONFIG_ATARI)
-#define MACH ATARI
+#  define MACH ATARI
 #elif defined(__i386__) || defined(__x86_64__) || defined(__arm__)  /* and others?? */
 #define MACH PC
+#  if defined(CONFIG_COBALT)
+#    include <linux/cobalt-nvram.h>
+#    define MACH COBALT
+#  else
+#    define MACH PC
+#  endif
 #else
-#error Cannot build nvram driver for this machine configuration.
+#  error Cannot build nvram driver for this machine configuration.
 #endif
 
 #if MACH == PC
@@ -58,6 +70,7 @@
 #define PC_CKS_RANGE_START	2
 #define PC_CKS_RANGE_END	31
 #define PC_CKS_LOC		32
+#define NVRAM_BYTES		(128-NVRAM_FIRST_BYTE)
 
 #define mach_check_checksum	pc_check_checksum
 #define mach_set_checksum	pc_set_checksum
@@ -65,6 +78,18 @@
 
 #endif
 
+#if MACH == COBALT
+
+#define CHECK_DRIVER_INIT()     1
+
+#define NVRAM_BYTES		(128-NVRAM_FIRST_BYTE)
+
+#define mach_check_checksum	cobalt_check_checksum
+#define mach_set_checksum	cobalt_set_checksum
+#define mach_proc_infos		cobalt_proc_infos
+
+#endif
+
 #if MACH == ATARI
 
 /* Special parameters for RTC in Atari machines */
@@ -98,7 +123,6 @@
 #include <linux/ioport.h>
 #include <linux/fcntl.h>
 #include <linux/mc146818rtc.h>
-#include <linux/nvram.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/spinlock.h>
@@ -107,18 +131,12 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
+static spinlock_t nvram_state_lock = SPIN_LOCK_UNLOCKED;
 static int nvram_open_cnt;	/* #times opened */
 static int nvram_open_mode;	/* special open modes */
-static spinlock_t nvram_open_lock = SPIN_LOCK_UNLOCKED; /* guards 
-							 * nvram_open_cnt and
-							 * nvram_open_mode */
 #define NVRAM_WRITE		1 /* opened for writing (exclusive) */
 #define NVRAM_EXCL		2 /* opened with O_EXCL */
 
-#define	RTC_FIRST_BYTE		14	/* RTC register number of first
-					 * NVRAM byte */
-#define	NVRAM_BYTES		128-RTC_FIRST_BYTE /* number of NVRAM bytes */
-
 static int mach_check_checksum(void);
 static void mach_set_checksum(void);
 
@@ -128,48 +146,22 @@ static int mach_proc_infos(unsigned char *contents, char *buffer, int *len,
 #endif
 
 /*
- * These are the internal NVRAM access functions, which do NOT disable
- * interrupts and do not check the checksum. Both tasks are left to higher
- * level function, so they need to be done only once per syscall.
- */
-
-static __inline__ unsigned char
-nvram_read_int(int i)
-{
-	return CMOS_READ(RTC_FIRST_BYTE + i);
-}
-
-static __inline__ void
-nvram_write_int(unsigned char c, int i)
-{
-	CMOS_WRITE(c, RTC_FIRST_BYTE + i);
-}
-
-static __inline__ int
-nvram_check_checksum_int(void)
-{
-	return mach_check_checksum();
-}
-
-static __inline__ void
-nvram_set_checksum_int(void)
-{
-	mach_set_checksum();
-}
-
-#if MACH == ATARI
-
-/*
- * These non-internal functions are provided to be called by other parts of
+ * These functions are provided to be called internally or by other parts of
  * the kernel. It's up to the caller to ensure correct checksum before reading
  * or after writing (needs to be done only once).
  *
- * They're only built if CONFIG_ATARI is defined, because Atari drivers use
- * them. For other configurations (PC), the rest of the kernel can't rely on
- * them being present (this driver may not be configured at all, or as a
- * module), so they access config information themselves.
+ * It is worth noting that these functions all access bytes of general
+ * purpose memory in the NVRAM - that is to say, they all add the
+ * NVRAM_FIRST_BYTE offset.  Pass them offsets into NVRAM as if you did not 
+ * know about the RTC cruft.
  */
 
+unsigned char
+__nvram_read_byte(int i)
+{
+	return CMOS_READ(NVRAM_FIRST_BYTE + i);
+}
+
 unsigned char
 nvram_read_byte(int i)
 {
@@ -177,22 +169,34 @@ nvram_read_byte(int i)
 	unsigned char c;
 
 	spin_lock_irqsave(&rtc_lock, flags);
-	c = nvram_read_int(i);
+	c = __nvram_read_byte(i);
 	spin_unlock_irqrestore(&rtc_lock, flags);
 	return c;
 }
 
 /* This races nicely with trying to read with checksum checking (nvram_read) */
+void
+__nvram_write_byte(unsigned char c, int i)
+{
+	CMOS_WRITE(c, NVRAM_FIRST_BYTE + i);
+}
+
 void
 nvram_write_byte(unsigned char c, int i)
 {
 	unsigned long flags;
 
 	spin_lock_irqsave(&rtc_lock, flags);
-	nvram_write_int(c, i);
+	__nvram_write_byte(c, i);
 	spin_unlock_irqrestore(&rtc_lock, flags);
 }
 
+int
+__nvram_check_checksum(void)
+{
+	return mach_check_checksum();
+}
+
 int
 nvram_check_checksum(void)
 {
@@ -200,23 +204,27 @@ nvram_check_checksum(void)
 	int rv;
 
 	spin_lock_irqsave(&rtc_lock, flags);
-	rv = nvram_check_checksum_int();
+	rv = __nvram_check_checksum();
 	spin_unlock_irqrestore(&rtc_lock, flags);
 	return rv;
 }
 
+void
+__nvram_set_checksum(void)
+{
+	mach_set_checksum();
+}
+
 void
 nvram_set_checksum(void)
 {
 	unsigned long flags;
 
 	spin_lock_irqsave(&rtc_lock, flags);
-	nvram_set_checksum_int();
+	__nvram_set_checksum();
 	spin_unlock_irqrestore(&rtc_lock, flags);
 }
 
-#endif /* MACH == ATARI */
-
 /*
  * The are the file operation function for user access to /dev/nvram
  */
@@ -243,17 +251,17 @@ nvram_llseek(struct file *file, loff_t offset, int origin)
 static ssize_t
 nvram_read(struct file *file, char *buf, size_t count, loff_t *ppos)
 {
-	char contents[NVRAM_BYTES];
+	unsigned char contents[NVRAM_BYTES];
 	unsigned i = *ppos;
-	char *tmp;
+	unsigned char *tmp;
 
 	spin_lock_irq(&rtc_lock);
 
-	if (!nvram_check_checksum_int())
+	if (!__nvram_check_checksum())
 		goto checksum_err;
 
 	for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
-		*tmp = nvram_read_int(i);
+		*tmp = __nvram_read_byte(i);
 
 	spin_unlock_irq(&rtc_lock);
 
@@ -272,23 +280,24 @@ nvram_read(struct file *file, char *buf, size_t count, loff_t *ppos)
 static ssize_t
 nvram_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
 {
-	char contents[NVRAM_BYTES];
+	unsigned char contents[NVRAM_BYTES];
 	unsigned i = *ppos;
-	char *tmp;
+	unsigned char *tmp;
+	int len;
 
-	if (copy_from_user(contents, buf, (NVRAM_BYTES - i) < count ?
-	    (NVRAM_BYTES - i) : count))
+	len = (NVRAM_BYTES - i) < count ? (NVRAM_BYTES - i) : count;
+	if (copy_from_user(contents, buf, len))
 		return -EFAULT;
 
 	spin_lock_irq(&rtc_lock);
 
-	if (!nvram_check_checksum_int())
+	if (!__nvram_check_checksum())
 		goto checksum_err;
 
 	for (tmp = contents; count-- > 0 && i < NVRAM_BYTES; ++i, ++tmp)
-		nvram_write_int(*tmp, i);
+		__nvram_write_byte(*tmp, i);
 
-	nvram_set_checksum_int();
+	__nvram_set_checksum();
 
 	spin_unlock_irq(&rtc_lock);
 
@@ -309,27 +318,28 @@ nvram_ioctl(struct inode *inode, struct file *file,
 
 	switch (cmd) {
 
-	case NVRAM_INIT:	/* initialize NVRAM contents and checksum */
+	case NVRAM_INIT:
+		/* initialize NVRAM contents and checksum */
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 
 		spin_lock_irq(&rtc_lock);
 
 		for (i = 0; i < NVRAM_BYTES; ++i)
-			nvram_write_int(0, i);
-		nvram_set_checksum_int();
+			__nvram_write_byte(0, i);
+		__nvram_set_checksum();
 
 		spin_unlock_irq(&rtc_lock);
 		return 0;
 
-	case NVRAM_SETCKS:	/* just set checksum, contents unchanged
-				 * (maybe useful after checksum garbaged
-				 * somehow...) */
+	case NVRAM_SETCKS:
+		/* just set checksum, contents unchanged (maybe useful after 
+		 * checksum garbaged somehow...) */
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 
 		spin_lock_irq(&rtc_lock);
-		nvram_set_checksum_int();
+		__nvram_set_checksum();
 		spin_unlock_irq(&rtc_lock);
 		return 0;
 
@@ -341,11 +351,12 @@ nvram_ioctl(struct inode *inode, struct file *file,
 static int
 nvram_open(struct inode *inode, struct file *file)
 {
-	spin_lock(&nvram_open_lock);
+	spin_lock(&nvram_state_lock);
+
 	if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
 	    (nvram_open_mode & NVRAM_EXCL) ||
 	    ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
-		spin_unlock(&nvram_open_lock);
+		spin_unlock(&nvram_state_lock);
 		return -EBUSY;
 	}
 
@@ -354,20 +365,27 @@ nvram_open(struct inode *inode, struct file *file)
 	if (file->f_mode & 2)
 		nvram_open_mode |= NVRAM_WRITE;
 	nvram_open_cnt++;
-	spin_unlock(&nvram_open_lock);
+
+	spin_unlock(&nvram_state_lock);
+
 	return 0;
 }
 
 static int
 nvram_release(struct inode *inode, struct file *file)
 {
-	spin_lock(&nvram_open_lock);
+	spin_lock(&nvram_state_lock);
+
 	nvram_open_cnt--;
-	if (file->f_flags & O_EXCL)
+
+	/* if only one instance is open, clear the EXCL bit */
+	if (nvram_open_mode & NVRAM_EXCL)
 		nvram_open_mode &= ~NVRAM_EXCL;
 	if (file->f_mode & 2)
 		nvram_open_mode &= ~NVRAM_WRITE;
-	spin_unlock(&nvram_open_lock);
+
+	spin_unlock(&nvram_state_lock);
+
 	return 0;
 }
 
@@ -390,7 +408,7 @@ nvram_read_proc(char *buffer, char **start, off_t offset,
 
 	spin_lock_irq(&rtc_lock);
 	for (i = 0; i < NVRAM_BYTES; ++i)
-		contents[i] = nvram_read_int(i);
+		contents[i] = __nvram_read_byte(i);
 	spin_unlock_irq(&rtc_lock);
 
 	*eof = mach_proc_infos(contents, buffer, &len, &begin, offset, size);
@@ -484,11 +502,13 @@ pc_check_checksum(void)
 {
 	int i;
 	unsigned short sum = 0;
+	unsigned short expect;
 
 	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
-		sum += nvram_read_int(i);
-	return ((sum & 0xffff) ==
-	    ((nvram_read_int(PC_CKS_LOC)<<8) | nvram_read_int(PC_CKS_LOC+1)));
+		sum += __nvram_read_byte(i);
+	expect = __nvram_read_byte(PC_CKS_LOC)<<8 |
+	    __nvram_read_byte(PC_CKS_LOC+1);
+	return ((sum & 0xffff) == expect);
 }
 
 static void
@@ -498,9 +518,9 @@ pc_set_checksum(void)
 	unsigned short sum = 0;
 
 	for (i = PC_CKS_RANGE_START; i <= PC_CKS_RANGE_END; ++i)
-		sum += nvram_read_int(i);
-	nvram_write_int(sum >> 8, PC_CKS_LOC);
-	nvram_write_int(sum & 0xff, PC_CKS_LOC + 1);
+		sum += __nvram_read_byte(i);
+	__nvram_write_byte(sum >> 8, PC_CKS_LOC);
+	__nvram_write_byte(sum & 0xff, PC_CKS_LOC + 1);
 }
 
 #ifdef CONFIG_PROC_FS
@@ -525,7 +545,7 @@ pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
 	int type;
 
 	spin_lock_irq(&rtc_lock);
-	checksum = nvram_check_checksum_int();
+	checksum = __nvram_check_checksum();
 	spin_unlock_irq(&rtc_lock);
 
 	PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
@@ -583,6 +603,177 @@ pc_proc_infos(unsigned char *nvram, char *buffer, int *len,
 
 #endif /* MACH == PC */
 
+#if MACH == COBALT
+
+/* the cobalt CMOS has a wider range of it's checksum */
+static int cobalt_check_checksum(void)
+{
+	int i;
+	unsigned short sum = 0;
+	unsigned short expect;
+
+	for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
+		if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
+			continue;
+
+		sum += __nvram_read_byte(i);
+	}
+	expect = __nvram_read_byte(COBT_CMOS_CHECKSUM) << 8 |
+	    __nvram_read_byte(COBT_CMOS_CHECKSUM+1);
+	return ((sum & 0xffff) == expect);
+}
+
+static void cobalt_set_checksum(void)
+{
+	int i;
+	unsigned short sum = 0;
+
+	for (i = COBT_CMOS_CKS_START; i <= COBT_CMOS_CKS_END; ++i) {
+		if ((i == COBT_CMOS_CHECKSUM) || (i == (COBT_CMOS_CHECKSUM+1)))
+			continue;
+
+		sum += __nvram_read_byte(i);
+	}
+
+	__nvram_write_byte(sum >> 8, COBT_CMOS_CHECKSUM);
+	__nvram_write_byte(sum & 0xff, COBT_CMOS_CHECKSUM+1);
+}
+
+#ifdef CONFIG_PROC_FS
+
+static int cobalt_proc_infos(unsigned char *nvram, char *buffer, int *len,
+	off_t *begin, off_t offset, int size)
+{
+	int i;
+	unsigned int checksum;
+	unsigned int flags;
+	char sernum[14];
+	char *key = "cNoEbTaWlOtR!";
+	unsigned char bto_csum;
+
+	spin_lock_irq(&rtc_lock);
+	checksum = __nvram_check_checksum();
+	spin_unlock_irq(&rtc_lock);
+
+	PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
+
+	flags = nvram[COBT_CMOS_FLAG_BYTE_0] << 8 
+	    | nvram[COBT_CMOS_FLAG_BYTE_1];
+
+	PRINT_PROC("Console: %s\n",
+		flags & COBT_CMOS_CONSOLE_FLAG ?  "on": "off");
+
+	PRINT_PROC("Firmware Debug Messages: %s\n",
+		flags & COBT_CMOS_DEBUG_FLAG ? "on": "off");
+
+	PRINT_PROC("Auto Prompt: %s\n",
+		flags & COBT_CMOS_AUTO_PROMPT_FLAG ? "on": "off");
+
+	PRINT_PROC("Shutdown Status: %s\n",
+		flags & COBT_CMOS_CLEAN_BOOT_FLAG ? "clean": "dirty");
+
+	PRINT_PROC("Hardware Probe: %s\n",
+		flags & COBT_CMOS_HW_NOPROBE_FLAG ? "partial": "full");
+
+	PRINT_PROC("System Fault: %sdetected\n",
+		flags & COBT_CMOS_SYSFAULT_FLAG ? "": "not ");
+
+	PRINT_PROC("Panic on OOPS: %s\n",
+		flags & COBT_CMOS_OOPSPANIC_FLAG ? "yes": "no");
+
+	PRINT_PROC("Delayed Cache Initialization: %s\n",
+		flags & COBT_CMOS_DELAY_CACHE_FLAG ? "yes": "no");
+
+	PRINT_PROC("Show Logo at Boot: %s\n",
+		flags & COBT_CMOS_NOLOGO_FLAG ? "no": "yes");
+
+	PRINT_PROC("Boot Method: ");
+	switch (nvram[COBT_CMOS_BOOT_METHOD]) {
+	case COBT_CMOS_BOOT_METHOD_DISK:
+		PRINT_PROC("disk\n");
+		break;
+
+	case COBT_CMOS_BOOT_METHOD_ROM:
+		PRINT_PROC("rom\n");
+		break;
+
+	case COBT_CMOS_BOOT_METHOD_NET:
+		PRINT_PROC("net\n");
+		break;
+
+	default:
+		PRINT_PROC("unknown\n");
+		break;
+	}
+
+	PRINT_PROC("Primary Boot Device: %d:%d\n",
+		nvram[COBT_CMOS_BOOT_DEV0_MAJ],
+		nvram[COBT_CMOS_BOOT_DEV0_MIN] );
+	PRINT_PROC("Secondary Boot Device: %d:%d\n",
+		nvram[COBT_CMOS_BOOT_DEV1_MAJ],
+		nvram[COBT_CMOS_BOOT_DEV1_MIN] );
+	PRINT_PROC("Tertiary Boot Device: %d:%d\n",
+		nvram[COBT_CMOS_BOOT_DEV2_MAJ],
+		nvram[COBT_CMOS_BOOT_DEV2_MIN] );
+
+	PRINT_PROC("Uptime: %d\n",
+		nvram[COBT_CMOS_UPTIME_0] << 24 |
+		nvram[COBT_CMOS_UPTIME_1] << 16 |
+		nvram[COBT_CMOS_UPTIME_2] << 8  |
+		nvram[COBT_CMOS_UPTIME_3]);
+
+	PRINT_PROC("Boot Count: %d\n",
+		nvram[COBT_CMOS_BOOTCOUNT_0] << 24 |
+		nvram[COBT_CMOS_BOOTCOUNT_1] << 16 |
+		nvram[COBT_CMOS_BOOTCOUNT_2] << 8  |
+		nvram[COBT_CMOS_BOOTCOUNT_3]);
+
+	/* 13 bytes of serial num */
+	for (i=0 ; i<13 ; i++) {
+		sernum[i] = nvram[COBT_CMOS_SYS_SERNUM_0 + i];
+	}
+	sernum[13] = '\0';
+
+	checksum = 0;
+	for (i=0 ; i<13 ; i++) {
+		checksum += sernum[i] ^ key[i];
+	}
+	checksum = ((checksum & 0x7f) ^ (0xd6)) & 0xff;
+
+	PRINT_PROC("Serial Number: %s", sernum);
+	if (checksum != nvram[COBT_CMOS_SYS_SERNUM_CSUM]) {
+		PRINT_PROC(" (invalid checksum)");
+	}
+	PRINT_PROC("\n");
+
+	PRINT_PROC("Rom Revison: %d.%d.%d\n", nvram[COBT_CMOS_ROM_REV_MAJ],
+		nvram[COBT_CMOS_ROM_REV_MIN], nvram[COBT_CMOS_ROM_REV_REV]);
+
+	PRINT_PROC("BTO Server: %d.%d.%d.%d", nvram[COBT_CMOS_BTO_IP_0],
+		nvram[COBT_CMOS_BTO_IP_1], nvram[COBT_CMOS_BTO_IP_2],
+		nvram[COBT_CMOS_BTO_IP_3]);
+	bto_csum = nvram[COBT_CMOS_BTO_IP_0] + nvram[COBT_CMOS_BTO_IP_1]
+		+ nvram[COBT_CMOS_BTO_IP_2] + nvram[COBT_CMOS_BTO_IP_3];
+	if (bto_csum != nvram[COBT_CMOS_BTO_IP_CSUM]) {
+		PRINT_PROC(" (invalid checksum)");
+	}
+	PRINT_PROC("\n");
+
+	if (flags & COBT_CMOS_VERSION_FLAG
+	 && nvram[COBT_CMOS_VERSION] >= COBT_CMOS_VER_BTOCODE) {
+		PRINT_PROC("BTO Code: 0x%x\n",
+			nvram[COBT_CMOS_BTO_CODE_0] << 24 |
+			nvram[COBT_CMOS_BTO_CODE_1] << 16 |
+			nvram[COBT_CMOS_BTO_CODE_2] << 8 |
+			nvram[COBT_CMOS_BTO_CODE_3]);
+	}
+
+	return 1;
+}
+#endif /* CONFIG_PROC_FS */
+
+#endif /* MACH == COBALT */
+
 #if MACH == ATARI
 
 static int
@@ -592,9 +783,9 @@ atari_check_checksum(void)
 	unsigned char sum = 0;
 
 	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
-		sum += nvram_read_int(i);
-	return (nvram_read_int(ATARI_CKS_LOC) == (~sum & 0xff) &&
-	    nvram_read_int(ATARI_CKS_LOC + 1) == (sum & 0xff));
+		sum += __nvram_read_byte(i);
+	return (__nvram_read_byte(ATARI_CKS_LOC) == (~sum & 0xff) &&
+	    __nvram_read_byte(ATARI_CKS_LOC + 1) == (sum & 0xff));
 }
 
 static void
@@ -604,9 +795,9 @@ atari_set_checksum(void)
 	unsigned char sum = 0;
 
 	for (i = ATARI_CKS_RANGE_START; i <= ATARI_CKS_RANGE_END; ++i)
-		sum += nvram_read_int(i);
-	nvram_write_int(~sum, ATARI_CKS_LOC);
-	nvram_write_int(sum, ATARI_CKS_LOC + 1);
+		sum += __nvram_read_byte(i);
+	__nvram_write_byte(~sum, ATARI_CKS_LOC);
+	__nvram_write_byte(sum, ATARI_CKS_LOC + 1);
 }
 
 #ifdef CONFIG_PROC_FS
@@ -722,3 +913,12 @@ atari_proc_infos(unsigned char *nvram, char *buffer, int *len,
 #endif /* MACH == ATARI */
 
 MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(__nvram_read_byte);
+EXPORT_SYMBOL(nvram_read_byte);
+EXPORT_SYMBOL(__nvram_write_byte);
+EXPORT_SYMBOL(nvram_write_byte);
+EXPORT_SYMBOL(__nvram_check_checksum);
+EXPORT_SYMBOL(nvram_check_checksum);
+EXPORT_SYMBOL(__nvram_set_checksum);
+EXPORT_SYMBOL(nvram_set_checksum);

fs/devfs/base.c

@@ -645,6 +645,9 @@
     20020728   Richard Gooch <rgooch@atnf.csiro.au>
 	       Removed deprecated <devfs_find_handle>.
   v1.20
+    20020820   Richard Gooch <rgooch@atnf.csiro.au>
+	       Fixed module unload race in <devfs_open>.
+  v1.21
 */
 #include <linux/types.h>
 #include <linux/errno.h>
@@ -677,7 +680,7 @@
 #include <asm/bitops.h>
 #include <asm/atomic.h>
 
-#define DEVFS_VERSION            "1.20 (20020728)"
+#define DEVFS_VERSION            "1.21 (20020820)"
 
 #define DEVFS_NAME "devfs"
 
@@ -2228,16 +2231,15 @@ const char *devfs_get_name (devfs_handle_t de, unsigned int *namelen)
 
 
 /**
- *	devfs_only - returns if "devfs=only" is a boot option
+ *	devfs_only - returns true if "devfs=only" is a boot option
  *
  *	If "devfs=only" this function will return 1, otherwise 0 is returned.
  */
+
 int devfs_only (void)
 {
-    if (boot_options & OPTION_ONLY)
-	    return 1;
-    return 0;
-}
+    return (boot_options & OPTION_ONLY) ? 1 : 0;
+}   /*  End Function devfs_only  */
 
 
 /**
@@ -2312,6 +2314,7 @@ EXPORT_SYMBOL(devfs_unregister);
 EXPORT_SYMBOL(devfs_mk_symlink);
 EXPORT_SYMBOL(devfs_mk_dir);
 EXPORT_SYMBOL(devfs_get_handle);
+EXPORT_SYMBOL(devfs_find_and_unregister);
 EXPORT_SYMBOL(devfs_get_flags);
 EXPORT_SYMBOL(devfs_set_flags);
 EXPORT_SYMBOL(devfs_get_maj_min);
@@ -2327,6 +2330,7 @@ EXPORT_SYMBOL(devfs_get_next_sibling);
 EXPORT_SYMBOL(devfs_auto_unregister);
 EXPORT_SYMBOL(devfs_get_unregister_slave);
 EXPORT_SYMBOL(devfs_get_name);
+EXPORT_SYMBOL(devfs_only);
 
 
 /**
@@ -2382,7 +2386,7 @@ static int check_disc_changed (struct devfs_entry *de)
     extern int warn_no_part;
 
     if ( !S_ISBLK (de->mode) ) return 0;
-    bdev = bdget(kdev_t_to_nr(dev));
+    bdev = bdget (kdev_t_to_nr (dev) );
     if (!bdev) return 0;
     bdops = devfs_get_ops (de);
     if (!bdops) return 0;
@@ -2390,7 +2394,7 @@ static int check_disc_changed (struct devfs_entry *de)
     /*  Ugly hack to disable messages about unable to read partition table  */
     tmp = warn_no_part;
     warn_no_part = 0;
-    retval = full_check_disk_change(bdev);
+    retval = full_check_disk_change (bdev);
     warn_no_part = tmp;
 out:
     devfs_put_ops (de);
@@ -2692,21 +2696,23 @@ static int devfs_open (struct inode *inode, struct file *file)
     struct fcb_type *df;
     struct devfs_entry *de;
     struct fs_info *fs_info = inode->i_sb->u.generic_sbp;
+    void *ops;
 
     de = get_devfs_entry_from_vfs_inode (inode);
     if (de == NULL) return -ENODEV;
     if ( S_ISDIR (de->mode) ) return 0;
     df = &de->u.fcb;
     file->private_data = de->info;
+    ops = devfs_get_ops (de);  /*  Now have module refcount  */
     if ( S_ISBLK (inode->i_mode) )
     {
 	file->f_op = &def_blk_fops;
-	if (df->ops) inode->i_bdev->bd_op = df->ops;
-	err = def_blk_fops.open (inode, file);
+	if (ops) inode->i_bdev->bd_op = ops;
+	err = def_blk_fops.open (inode, file); /* Module refcount unchanged */
     }
     else
     {
-	file->f_op = fops_get ( (struct file_operations *) df->ops );
+	file->f_op = ops;
 	if (file->f_op)
 	{
 	    lock_kernel ();
@@ -2714,7 +2720,7 @@ static int devfs_open (struct inode *inode, struct file *file)
 	    unlock_kernel ();
 	}
 	else
-	{   /*  Fallback to legacy scheme  */
+	{   /*  Fallback to legacy scheme (I don't have a module refcount)  */
 	    if ( S_ISCHR (inode->i_mode) ) err = chrdev_open (inode, file);
 	    else err = -ENODEV;
 	}

fs/lockd/svc.c

@@ -203,6 +203,7 @@ lockd(struct svc_rqst *rqstp)
 	rpciod_down();
 
 	/* Release module */
+	unlock_kernel();
 	MOD_DEC_USE_COUNT;
 }
 

include/asm-i386/xor.h

@@ -20,6 +20,7 @@
 
 #define FPU_SAVE							\
   do {									\
+	preempt_disable();						\
 	if (!test_thread_flag(TIF_USEDFPU))				\
 		__asm__ __volatile__ (" clts;\n");			\
 	__asm__ __volatile__ ("fsave %0; fwait": "=m"(fpu_save[0]));	\
@@ -30,6 +31,7 @@
 	__asm__ __volatile__ ("frstor %0": : "m"(fpu_save[0]));		\
 	if (!test_thread_flag(TIF_USEDFPU))				\
 		stts();							\
+	preempt_enable();						\
   } while (0)
 
 #define LD(x,y)		"       movq   8*("#x")(%1), %%mm"#y"   ;\n"
@@ -542,7 +544,8 @@ static struct xor_block_template xor_block_p5_mmx = {
  * Copyright (C) 1999 Zach Brown (with obvious credit due Ingo)
  */
 
-#define XMMS_SAVE				\
+#define XMMS_SAVE do {				\
+	preempt_disable();			\
 	__asm__ __volatile__ ( 			\
 		"movl %%cr0,%0		;\n\t"	\
 		"clts			;\n\t"	\
@@ -552,9 +555,10 @@ static struct xor_block_template xor_block_p5_mmx = {
 		"movups %%xmm3,0x30(%1)	;\n\t"	\
 		: "=&r" (cr0)			\
 		: "r" (xmm_save) 		\
-		: "memory")
+		: "memory");			\
+} while(0)
 
-#define XMMS_RESTORE				\
+#define XMMS_RESTORE do {			\
 	__asm__ __volatile__ ( 			\
 		"sfence			;\n\t"	\
 		"movups (%1),%%xmm0	;\n\t"	\
@@ -564,7 +568,9 @@ static struct xor_block_template xor_block_p5_mmx = {
 		"movl 	%0,%%cr0	;\n\t"	\
 		:				\
 		: "r" (cr0), "r" (xmm_save)	\
-		: "memory")
+		: "memory");			\
+	preempt_enable();			\
+} while(0)
 
 #define ALIGN16 __attribute__((aligned(16)))
 

include/asm-x86_64/xor.h

@@ -37,7 +37,8 @@ typedef struct { unsigned long a,b; } __attribute__((aligned(16))) xmm_store_t;
 
 /* Doesn't use gcc to save the XMM registers, because there is no easy way to 
    tell it to do a clts before the register saving. */
-#define XMMS_SAVE				\
+#define XMMS_SAVE do {				\
+	preempt_disable();			\
 	asm volatile (				\
 		"movq %%cr0,%0		;\n\t"	\
 		"clts			;\n\t"	\
@@ -47,7 +48,8 @@ typedef struct { unsigned long a,b; } __attribute__((aligned(16))) xmm_store_t;
 		"movups %%xmm3,0x30(%1)	;\n\t"	\
 		: "=r" (cr0)			\
 		: "r" (xmm_save) 		\
-		: "memory")
+		: "memory");			\
+} while(0)
 
 #define XMMS_RESTORE				\
 	asm volatile (				\
@@ -59,7 +61,9 @@ typedef struct { unsigned long a,b; } __attribute__((aligned(16))) xmm_store_t;
 		"movq 	%0,%%cr0	;\n\t"	\
 		:				\
 		: "r" (cr0), "r" (xmm_save)	\
-		: "memory")
+		: "memory");			\
+	preempt_enable();			\
+} while(0)
 
 #define OFFS(x)		"16*("#x")"
 #define PF_OFFS(x)	"256+16*("#x")"

include/linux/cobalt-nvram.h

+/*
+ * $Id: cobalt-nvram.h,v 1.20 2001/10/17 23:16:55 thockin Exp $
+ * cobalt-nvram.h : defines for the various fields in the cobalt NVRAM
+ *
+ * Copyright 2001,2002 Sun Microsystems, Inc.
+ */
+
+#ifndef COBALT_NVRAM_H
+#define COBALT_NVRAM_H
+
+#include <linux/nvram.h>
+
+#define COBT_CMOS_INFO_MAX		0x7f	/* top address allowed */
+#define COBT_CMOS_BIOS_DRIVE_INFO	0x12	/* drive info would go here */
+
+#define COBT_CMOS_CKS_START		NVRAM_OFFSET(0x0e)
+#define COBT_CMOS_CKS_END		NVRAM_OFFSET(0x7f)
+
+/* flag bytes - 16 flags for now, leave room for more */
+#define COBT_CMOS_FLAG_BYTE_0		NVRAM_OFFSET(0x10)
+#define COBT_CMOS_FLAG_BYTE_1		NVRAM_OFFSET(0x11)
+
+/* flags in flag bytes - up to 16 */
+#define COBT_CMOS_FLAG_MIN		0x0001
+#define COBT_CMOS_CONSOLE_FLAG		0x0001 /* console on/off */
+#define COBT_CMOS_DEBUG_FLAG		0x0002 /* ROM debug messages */
+#define COBT_CMOS_AUTO_PROMPT_FLAG	0x0004 /* boot to ROM prompt? */
+#define COBT_CMOS_CLEAN_BOOT_FLAG	0x0008 /* set by a clean shutdown */
+#define COBT_CMOS_HW_NOPROBE_FLAG	0x0010 /* go easy on the probing */
+#define COBT_CMOS_SYSFAULT_FLAG		0x0020 /* system fault detected */
+#define COBT_CMOS_OOPSPANIC_FLAG	0x0040 /* panic on oops */
+#define COBT_CMOS_DELAY_CACHE_FLAG	0x0080 /* delay cache initialization */
+#define COBT_CMOS_NOLOGO_FLAG		0x0100 /* hide "C" logo @ boot */
+#define COBT_CMOS_VERSION_FLAG		0x0200 /* the version field is valid */
+#define COBT_CMOS_FLAG_MAX		0x0200
+
+/* leave byte 0x12 blank - Linux looks for drive info here */
+
+/* CMOS structure version, valid if COBT_CMOS_VERSION_FLAG is true */
+#define COBT_CMOS_VERSION		NVRAM_OFFSET(0x13)
+#define COBT_CMOS_VER_BTOCODE		1 /* min. version needed for btocode */
+
+/* index of default boot method */
+#define COBT_CMOS_BOOT_METHOD		NVRAM_OFFSET(0x20)
+#define COBT_CMOS_BOOT_METHOD_DISK	0
+#define COBT_CMOS_BOOT_METHOD_ROM	1
+#define COBT_CMOS_BOOT_METHOD_NET	2
+
+#define COBT_CMOS_BOOT_DEV_MIN		NVRAM_OFFSET(0x21)
+/* major #, minor # of first through fourth boot device */
+#define COBT_CMOS_BOOT_DEV0_MAJ		NVRAM_OFFSET(0x21)
+#define COBT_CMOS_BOOT_DEV0_MIN		NVRAM_OFFSET(0x22)
+#define COBT_CMOS_BOOT_DEV1_MAJ		NVRAM_OFFSET(0x23)
+#define COBT_CMOS_BOOT_DEV1_MIN		NVRAM_OFFSET(0x24)
+#define COBT_CMOS_BOOT_DEV2_MAJ		NVRAM_OFFSET(0x25)
+#define COBT_CMOS_BOOT_DEV2_MIN		NVRAM_OFFSET(0x26)
+#define COBT_CMOS_BOOT_DEV3_MAJ		NVRAM_OFFSET(0x27)
+#define COBT_CMOS_BOOT_DEV3_MIN		NVRAM_OFFSET(0x28)
+#define COBT_CMOS_BOOT_DEV_MAX		NVRAM_OFFSET(0x28)
+
+/* checksum of bytes 0xe-0x7f */
+#define COBT_CMOS_CHECKSUM		NVRAM_OFFSET(0x2e)
+
+/* running uptime counter, units of 5 minutes (32 bits =~ 41000 years) */
+#define COBT_CMOS_UPTIME_0		NVRAM_OFFSET(0x30)
+#define COBT_CMOS_UPTIME_1		NVRAM_OFFSET(0x31)
+#define COBT_CMOS_UPTIME_2		NVRAM_OFFSET(0x32)
+#define COBT_CMOS_UPTIME_3		NVRAM_OFFSET(0x33)
+
+/* count of successful boots (32 bits) */
+#define COBT_CMOS_BOOTCOUNT_0		NVRAM_OFFSET(0x38)
+#define COBT_CMOS_BOOTCOUNT_1		NVRAM_OFFSET(0x39)
+#define COBT_CMOS_BOOTCOUNT_2		NVRAM_OFFSET(0x3a)
+#define COBT_CMOS_BOOTCOUNT_3		NVRAM_OFFSET(0x3b)
+
+/* 13 bytes: system serial number, same as on the back of the system */
+#define COBT_CMOS_SYS_SERNUM_LEN	13
+#define COBT_CMOS_SYS_SERNUM_0		NVRAM_OFFSET(0x40)
+#define COBT_CMOS_SYS_SERNUM_1		NVRAM_OFFSET(0x41)
+#define COBT_CMOS_SYS_SERNUM_2		NVRAM_OFFSET(0x42)
+#define COBT_CMOS_SYS_SERNUM_3		NVRAM_OFFSET(0x43)
+#define COBT_CMOS_SYS_SERNUM_4		NVRAM_OFFSET(0x44)
+#define COBT_CMOS_SYS_SERNUM_5		NVRAM_OFFSET(0x45)
+#define COBT_CMOS_SYS_SERNUM_6		NVRAM_OFFSET(0x46)
+#define COBT_CMOS_SYS_SERNUM_7		NVRAM_OFFSET(0x47)
+#define COBT_CMOS_SYS_SERNUM_8		NVRAM_OFFSET(0x48)
+#define COBT_CMOS_SYS_SERNUM_9		NVRAM_OFFSET(0x49)
+#define COBT_CMOS_SYS_SERNUM_10		NVRAM_OFFSET(0x4a)
+#define COBT_CMOS_SYS_SERNUM_11		NVRAM_OFFSET(0x4b)
+#define COBT_CMOS_SYS_SERNUM_12		NVRAM_OFFSET(0x4c)
+/* checksum for serial num - 1 byte */
+#define COBT_CMOS_SYS_SERNUM_CSUM	NVRAM_OFFSET(0x4f)
+
+#define COBT_CMOS_ROM_REV_MAJ		NVRAM_OFFSET(0x50)
+#define COBT_CMOS_ROM_REV_MIN		NVRAM_OFFSET(0x51)
+#define COBT_CMOS_ROM_REV_REV		NVRAM_OFFSET(0x52)
+
+#define COBT_CMOS_BTO_CODE_0		NVRAM_OFFSET(0x53)
+#define COBT_CMOS_BTO_CODE_1		NVRAM_OFFSET(0x54)
+#define COBT_CMOS_BTO_CODE_2		NVRAM_OFFSET(0x55)
+#define COBT_CMOS_BTO_CODE_3		NVRAM_OFFSET(0x56)
+
+#define COBT_CMOS_BTO_IP_CSUM		NVRAM_OFFSET(0x57)
+#define COBT_CMOS_BTO_IP_0		NVRAM_OFFSET(0x58)
+#define COBT_CMOS_BTO_IP_1		NVRAM_OFFSET(0x59)
+#define COBT_CMOS_BTO_IP_2		NVRAM_OFFSET(0x5a)
+#define COBT_CMOS_BTO_IP_3		NVRAM_OFFSET(0x5b)
+
+#endif /* COBALT_NVRAM_H */

include/linux/devfs_fs_kernel.h

@@ -95,7 +95,6 @@ extern void devfs_auto_unregister (devfs_handle_t master,devfs_handle_t slave);
 extern devfs_handle_t devfs_get_unregister_slave (devfs_handle_t master);
 extern const char *devfs_get_name (devfs_handle_t de, unsigned int *namelen);
 extern int devfs_only (void);
-
 extern void devfs_register_tape (devfs_handle_t de);
 extern void devfs_register_series (devfs_handle_t dir, const char *format,
 				   unsigned int num_entries,
@@ -238,7 +237,6 @@ static inline int devfs_only (void)
 {
     return 0;
 }
-
 static inline void devfs_register_tape (devfs_handle_t de)
 {
     return;

include/linux/highmem.h

@@ -22,7 +22,7 @@ static inline unsigned int nr_free_highpages(void) { return 0; }
 
 static inline void *kmap(struct page *page) { return page_address(page); }
 
-#define kunmap(page) do { } while (0)
+#define kunmap(page) do { (void) (page); } while (0)
 
 #define kmap_atomic(page,idx)		kmap(page)
 #define kunmap_atomic(page,idx)		kunmap(page)

include/linux/nvram.h

@@ -7,11 +7,21 @@
 #define NVRAM_INIT	_IO('p', 0x40) /* initialize NVRAM and set checksum */
 #define NVRAM_SETCKS	_IO('p', 0x41) /* recalculate checksum */
 
+/* for all current systems, this is where NVRAM starts */
+#define NVRAM_FIRST_BYTE    14
+/* all these functions expect an NVRAM offset, not an absolute */
+#define NVRAM_OFFSET(x)   ((x)-NVRAM_FIRST_BYTE)
+
 #ifdef __KERNEL__
-extern unsigned char nvram_read_byte( int i );
-extern void nvram_write_byte( unsigned char c, int i );
-extern int nvram_check_checksum( void );
-extern void nvram_set_checksum( void );
+/* __foo is foo without grabbing the rtc_lock - get it yourself */
+extern unsigned char __nvram_read_byte(int i);
+extern unsigned char nvram_read_byte(int i);
+extern void __nvram_write_byte(unsigned char c, int i);
+extern void nvram_write_byte(unsigned char c, int i);
+extern int __nvram_check_checksum(void);
+extern int nvram_check_checksum(void);
+extern void __nvram_set_checksum(void);
+extern void nvram_set_checksum(void);
 #endif
 
 #endif  /* _LINUX_NVRAM_H */

include/linux/smp.h

@@ -87,9 +87,6 @@ int cpu_up(unsigned int cpu);
 #define smp_processor_id()			0
 #define hard_smp_processor_id()			0
 #define smp_threads_ready			1
-#ifndef CONFIG_PREEMPT
-#define kernel_lock()
-#endif
 #define smp_call_function(func,info,retry,wait)	({ 0; })
 static inline void smp_send_reschedule(int cpu) { }
 static inline void smp_send_reschedule_all(void) { }

kernel/sched.c

@@ -1039,6 +1039,7 @@ asmlinkage void preempt_schedule(void)
 		printk("bad: schedule() with irqs disabled!\n");
 		show_stack(NULL);
 		preempt_enable_no_resched();
+		return;
 	}
 
 need_resched:

net/core/dev.c

@@ -1229,19 +1229,20 @@ static void sample_queue(unsigned long dummy)
 
 int netif_rx(struct sk_buff *skb)
 {
-	int this_cpu = smp_processor_id();
+	int this_cpu;
 	struct softnet_data *queue;
 	unsigned long flags;
 
 	if (!skb->stamp.tv_sec)
 		do_gettimeofday(&skb->stamp);
 
-	/* The code is rearranged so that the path is the most
-	   short when CPU is congested, but is still operating.
+	/*
+	 * The code is rearranged so that the path is the most
+	 * short when CPU is congested, but is still operating.
 	 */
-	queue = &softnet_data[this_cpu];
-
 	local_irq_save(flags);
+	this_cpu = smp_processor_id();
+	queue = &softnet_data[this_cpu];
 
 	netdev_rx_stat[this_cpu].total++;
 	if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
@@ -1252,10 +1253,10 @@ int netif_rx(struct sk_buff *skb)
 enqueue:
 			dev_hold(skb->dev);
 			__skb_queue_tail(&queue->input_pkt_queue, skb);
-			local_irq_restore(flags);
 #ifndef OFFLINE_SAMPLE
 			get_sample_stats(this_cpu);
 #endif
+			local_irq_restore(flags);
 			return queue->cng_level;
 		}
 

net/sunrpc/sched.c

@@ -1030,6 +1030,7 @@ rpciod(void *ptr)
 	wake_up(assassin);
 
 	dprintk("RPC: rpciod exiting\n");
+	unlock_kernel();
 	MOD_DEC_USE_COUNT;
 	return 0;
 }