Import 1.3.59

Documentation/networking/vortex.txt

+This document describes the usage and errata of the 3Com "Vortex" device
+driver for Linux.
+
+This driver supports the following hardware:
+	3c590, 3c592, 3c595, 3c597
+
+When loaded as a module the following variables may be set:
+ name	 type	description
+ debug	 int	The debug message level, 0 (no messages) to 6 (wordy).
+ options int[]	The media type override and card operation settings
+		(See list below.)
+
+An example of loading the vortex module is
+	insmod 3c59x.o debug=1 options=0,,12
+This sets the debug message level to minimal messages, sets the first card to
+the 10baseT transceiver, the second to the EEPROM-set transceiver, and the
+third card to operate in full-duplex mode using its 100baseTx transceiver.
+(Note: card ordering is set by the PCI BIOS.)
+
+Possible media type settings
+	0	10baseT
+	1	10Mbs AUI
+	2	undefined
+	3	10base2 (BNC)
+	4	100base-TX
+	5	100base-FX
+	6	MII (not yet available)
+	7	<Use default setting>
+	
+	8	Full-duplex bit
+		8 10baseT full-duplex
+		12 100baseTx full-duplex 
+	16	Bus-master enable bit (experimental use only!)
+
+Details of the device driver implementation are at the top of the source file.

Makefile

 VERSION = 1
 PATCHLEVEL = 3
-SUBLEVEL = 58
+SUBLEVEL = 59
 
 ARCH = i386
 

arch/alpha/kernel/Makefile

@@ -16,7 +16,7 @@ all: kernel.o head.o
 
 O_TARGET := kernel.o
 O_OBJS   := entry.o traps.o process.o osf_sys.o irq.o signal.o setup.o \
-	    bios32.o ptrace.o time.o apecs.o lca.o ksyms.c
+	    bios32.o ptrace.o time.o apecs.o lca.o ksyms.o
 
 all: kernel.o head.o
 

arch/i386/defconfig

@@ -6,7 +6,7 @@
 # Loadable module support
 #
 CONFIG_MODULES=y
-CONFIG_MODVERSIONS=y
+# CONFIG_MODVERSIONS is not set
 # CONFIG_KERNELD is not set
 
 #
@@ -88,6 +88,7 @@ CONFIG_NET_VENDOR_3COM=y
 # CONFIG_EL1 is not set
 # CONFIG_EL2 is not set
 CONFIG_EL3=y
+# CONFIG_VORTEX is not set
 # CONFIG_NET_ISA is not set
 # CONFIG_NET_EISA is not set
 # CONFIG_NET_POCKET is not set

drivers/block/ll_rw_blk.c

@@ -436,16 +436,19 @@ static void make_request(int major,int rw, struct buffer_head * bh)
 	add_request(major+blk_dev,req);
 }
 
+/*
+ * Swap partitions are now read via brw_page.  ll_rw_page is an
+ * asynchronous function now --- we must call wait_on_page afterwards
+ * if synchronous IO is required.  
+ */
 void ll_rw_page(int rw, kdev_t dev, unsigned long page, char * buffer)
 {
-	struct request * req;
 	unsigned int major = MAJOR(dev);
-	unsigned long sector = page * (PAGE_SIZE / 512);
-	struct semaphore sem = MUTEX_LOCKED;
+	int block = page;
 	
 	if (major >= MAX_BLKDEV || !(blk_dev[major].request_fn)) {
 		printk("Trying to read nonexistent block-device %s (%ld)\n",
-		       kdevname(dev), sector);
+		       kdevname(dev), page);
 		return;
 	}
 	switch (rw) {
@@ -461,19 +464,10 @@ void ll_rw_page(int rw, kdev_t dev, unsigned long page, char * buffer)
 		default:
 			panic("ll_rw_page: bad block dev cmd, must be R/W");
 	}
-	req = get_request_wait(NR_REQUEST, dev);
-/* fill up the request-info, and add it to the queue */
-	req->cmd = rw;
-	req->errors = 0;
-	req->sector = sector;
-	req->nr_sectors = PAGE_SIZE / 512;
-	req->current_nr_sectors = PAGE_SIZE / 512;
-	req->buffer = buffer;
-	req->sem = &sem;
-	req->bh = NULL;
-	req->next = NULL;
-	add_request(major+blk_dev,req);
-	down(&sem);
+	if (mem_map[MAP_NR(buffer)].locked)
+		panic ("ll_rw_page: page already locked");
+	mem_map[MAP_NR(buffer)].locked = 1;
+	brw_page(rw, (unsigned long) buffer, dev, &block, PAGE_SIZE, 0);
 }
 
 /* This function can be used to request a number of buffers from a block

drivers/char/apm_bios.c

@@ -20,6 +20,10 @@
  * January 1996, Rik Faith (faith@cs.unc.edu):
  *    Make /proc/apm easy to format (bump driver version)
  *
+ * History:
+ *    0.6b: first version in official kernel, Linux 1.3.46
+ *    0.7: changed /proc/apm format, Linux 1.3.58
+ *    0.8: fixed gcc 2.7.[12] compilation problems, Linux 1.3.59
  *
  * Reference:
  *
@@ -110,29 +114,40 @@ extern unsigned long get_cmos_time(void);
  */
 
 /*
- * define to have debug messages
+ * Define to have debug messages.
  */
 #undef APM_DEBUG
 
 /*
- * define to always call the APM BIOS busy routine even if the clock was
- * not slowed by the idle routine
+ * Define to always call the APM BIOS busy routine even if the clock was
+ * not slowed by the idle routine.
  */
 #define ALWAYS_CALL_BUSY
 
 /*
- * define to disable interrupts in APM BIOS calls (the CPU Idle BIOS call
- * should turn interrupts on before it does a 'hlt')
+ * Define to disable interrupts in APM BIOS calls (the CPU Idle BIOS call
+ * should turn interrupts on before it does a 'hlt').
  */
 #define APM_NOINTS
 
 /*
- * define to make the APM BIOS calls zero all data segment registers (do
- * that an incorrect BIOS implementation will cause a kernel panic if it
- * tries to write to arbitrary memory)
+ * Define to make the APM BIOS calls zero all data segment registers (do
+ * that if an incorrect BIOS implementation will cause a kernel panic if it
+ * tries to write to arbitrary memory).
  */
 #define APM_ZERO_SEGS
 
+/*
+ * Define to make all set_limit calls use 64k limits.  The APM 1.1 BIOS is
+ * supposed to provide limit information that it recognizes.  Many machines
+ * do this correctly, but many others do not restrict themselves to their
+ * claimed limit.  When this happens, they will cause a segmentation
+ * violation in the kernel at boot time.  Most BIOS's, however, will
+ * respect a 64k limit, so we use that.  If you want to be pedantic and
+ * hold your BIOS to its claims, then undefine this.
+ */
+#define APM_RELAX_SEGMENTS
+
 /*
  * Need to poll the APM BIOS every second
  */
@@ -193,27 +208,27 @@ extern unsigned long get_cmos_time(void);
 #define APM_SET_CPU_IDLE(error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x5305) \
+	: "a" (0x5305) \
 	APM_BIOS_CALL_END
 #endif
 
 #define APM_SET_CPU_BUSY(error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x5306) \
+	: "a" (0x5306) \
 	APM_BIOS_CALL_END
 
 #define APM_SET_POWER_STATE(state, error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x5307), "b" (0x0001), "c" (state) \
+	: "a" (0x5307), "b" (0x0001), "c" (state) \
 	APM_BIOS_CALL_END
 
 #ifdef CONFIG_APM_DISPLAY_BLANK
 #define APM_SET_DISPLAY_POWER_STATE(state, error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x5307), "b" (0x01ff), "c" (state) \
+	: "a" (0x5307), "b" (0x01ff), "c" (state) \
 	APM_BIOS_CALL_END
 #endif
 
@@ -221,32 +236,32 @@ extern unsigned long get_cmos_time(void);
 #define APM_ENABLE_POWER_MANAGEMENT(device, error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x5308), "b" (device), "c" (1) \
+	: "a" (0x5308), "b" (device), "c" (1) \
 	APM_BIOS_CALL_END
 #endif
 
 #define APM_GET_POWER_STATUS(bx, cx, dx, error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error), "=b" (bx), "=c" (cx), "=d" (dx) \
-	: "0" (0x530a), "1" (1) \
+	: "a" (0x530a), "b" (1) \
 	APM_BIOS_CALL_END
 
 #define APM_GET_EVENT(event, error)	\
 	APM_BIOS_CALL(al) \
 	: "=a" (error), "=b" (event) \
-	: "0" (0x530b) \
+	: "a" (0x530b) \
 	APM_BIOS_CALL_END
 
 #define APM_DRIVER_VERSION(ver, ax, error) \
 	APM_BIOS_CALL(bl) \
 	: "=a" (ax), "=b" (error) \
-	: "0" (0x530e), "1" (0), "c" (ver) \
+	: "a" (0x530e), "b" (0), "c" (ver) \
 	APM_BIOS_CALL_END
 
 #define APM_ENGAGE_POWER_MANAGEMENT(device, error) \
 	APM_BIOS_CALL(al) \
 	: "=a" (error) \
-	: "0" (0x530f), "b" (device), "c" (1) \
+	: "a" (0x530f), "b" (device), "c" (1) \
 	APM_BIOS_CALL_END
 
 /*
@@ -292,7 +307,7 @@ static struct apm_bios_struct *	user_list = NULL;
 
 static struct timer_list	apm_timer;
 
-static char			driver_version[] = "0.7";/* no spaces */
+static char			driver_version[] = "0.8";/* no spaces */
 
 #ifdef APM_DEBUG
 static char *	apm_event_name[] = {
@@ -1025,13 +1040,18 @@ static int apm_setup(void)
 		set_limit(gdt[APM_CS_16 >> 3], 64 * 1024);
 		set_limit(gdt[APM_DS >> 3], 64 * 1024);
 	} else {
-		set_limit(gdt[APM_CS >> 3], apm_bios_info.cseg_len);
-		/* This is not clear from the spec, but at least one
-		   machine needs CS_16 to be a 64k segment, and the DEC
-		   Hinote Ultra CT475 (and others?) needs DS to be a 64k
-		   segment. */
+#ifdef APM_RELAX_SEGMENTS
+		/* For ASUS motherboard, Award BIOS rev 110 (and others?) */
+		set_limit(gdt[APM_CS >> 3], 64 * 1024);
+		/* For some unknown machine. */
 		set_limit(gdt[APM_CS_16 >> 3], 64 * 1024);
+		/* For the DEC Hinote Ultra CT475 (and others?) */
 		set_limit(gdt[APM_DS >> 3], 64 * 1024);
+#else
+		set_limit(gdt[APM_CS >> 3], apm_bios_info.cseg_len);
+		set_limit(gdt[APM_CS_16 >> 3], 64 * 1024);
+		set_limit(gdt[APM_DS >> 3], apm_bios_info.dseg_len);
+#endif
 		apm_bios_info.version = 0x0101;
 		error = apm_driver_version(&apm_bios_info.version);
 		if (error != 0)

drivers/char/busmouse.c

@@ -65,7 +65,6 @@ static void mouse_interrupt(int irq, struct pt_regs *regs)
 	char dx, dy;
 	unsigned char buttons;
 
-	MSE_INT_OFF();
 	outb(MSE_READ_X_LOW, MSE_CONTROL_PORT);
 	dx = (inb(MSE_DATA_PORT) & 0xf);
 	outb(MSE_READ_X_HIGH, MSE_CONTROL_PORT);
@@ -171,6 +170,7 @@ static int read_mouse(struct inode * inode, struct file * file, char * buffer, i
 	int dx;
 	int dy;
 	unsigned char buttons; 
+	/* long flags; */
 
 	if (count < 3)
 		return -EINVAL;
@@ -186,7 +186,8 @@ static int read_mouse(struct inode * inode, struct file * file, char * buffer, i
 	 * so paging in put_user() does not effect mouse tracking.
 	 */
 
-	MSE_INT_OFF();
+	/* save_flags(flags); cli(); */
+	disable_irq(mouse_irq);
 	dx = mouse.dx;
 	dy = mouse.dy;
 	if (dx < -127)
@@ -201,7 +202,8 @@ static int read_mouse(struct inode * inode, struct file * file, char * buffer, i
 	mouse.dx -= dx;
 	mouse.dy -= dy;
 	mouse.ready = 0;
-	MSE_INT_ON();
+	enable_irq(mouse_irq);
+	/* restore_flags(flags); */
 
 	put_user(buttons | 0x80, buffer);
 	put_user((char)dx, buffer + 1);

drivers/char/selection.h

@@ -77,12 +77,9 @@ extern unsigned long video_mem_term;
  * of the VC's backing store, or the "shadow screen" memory where the screen
  * contents are kept, as the TGA frame buffer is *not* char/attr cells.
  *
- * The "(unsigned long) addr < video_mem_term" tests for an Alpha kernel
- *  virtual address less than the end of the "shadow scrren" memory. This
- *  indicates we really want to write to the screen, so, we do... :-)
- *
- * NOTE: we must guarantee that video_mem_term is less than *any* VC's backing
- * store; to do that, we must allocate it earlier than any VC's are done.
+ * We must test for an Alpha kernel virtual address that falls within
+ *  the "shadow screen" memory. This condition indicates we really want 
+ *  to write to the screen, so, we do... :-)
  *
  * NOTE also: there's only *TWO* operations: to put/get a character/attribute.
  *  All the others needed by VGA support go away, as Not Applicable for TGA.
@@ -94,7 +91,8 @@ static inline void scr_writew(unsigned short val, unsigned short * addr)
 	 * if so, then render the char/attr onto the real screen.
         */
         *addr = val;
-        if ((unsigned long)addr < video_mem_term) {
+        if ((unsigned long)addr < video_mem_term &&
+	    (unsigned long)addr >= video_mem_base) {
                 tga_blitc(val, (unsigned long) addr);
         }
 }

drivers/net/Config.in

@@ -29,6 +29,7 @@ if [ "$CONFIG_NET_VENDOR_3COM" = "y" ]; then
     tristate '3c507 support' CONFIG_EL16
   fi
   tristate '3c509/3c579 support' CONFIG_EL3
+  tristate '3c590 series (592/595/597) "Vortex" support' CONFIG_VORTEX
 fi
 bool 'Other ISA cards' CONFIG_NET_ISA
 if [ "$CONFIG_NET_ISA" = "y" ]; then

drivers/net/Makefile

@@ -226,6 +226,14 @@ else
   endif
 endif
 
+ifeq ($(CONFIG_VORTEX),y)
+L_OBJS += 3c59x.o
+else
+  ifeq ($(CONFIG_VORTEX),m)
+  M_OBJS += 3c59x.o
+  endif
+endif
+
 ifeq ($(CONFIG_EEXPRESS),y)
 L_OBJS += eexpress.o
 else

drivers/net/Space.c

@@ -68,6 +68,7 @@ extern int ni52_probe(struct device *);
 extern int ni65_probe(struct device *);
 extern int SK_init(struct device *);
 extern int seeq8005_probe(struct device *);
+extern int tc59x_probe(struct device *);
 
 /* Detachable devices ("pocket adaptors") */
 extern int atp_init(struct device *);
@@ -83,6 +84,9 @@ ethif_probe(struct device *dev)
 	return 1;		/* ENXIO */
 
     if (1
+#if defined(CONFIG_VORTEX)
+	&& tc59x_probe(dev)
+#endif
 #if defined(CONFIG_SEEQ8005)
 	&& seeq8005_probe(dev)
 #endif

drivers/net/ibmtr.c

@@ -325,7 +325,7 @@ int tok_probe(struct device *dev)
       if (intr==2) irq=10;
       if (intr==3) irq=11;
       while(!(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN));
-      ti->sram=(unsigned char *)((unsigned long)(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN) <<12);
+      ti->sram=(unsigned char *)((unsigned long)(*(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)) <<12);
       ti->global_int_enable=PIOaddr+ADAPTINTREL;
       break;
       

drivers/scsi/Config.in

@@ -37,5 +37,6 @@ dep_tristate 'UltraStor SCSI support' CONFIG_SCSI_ULTRASTOR $CONFIG_SCSI
 dep_tristate '7000FASST SCSI support' CONFIG_SCSI_7000FASST $CONFIG_SCSI
 dep_tristate 'EATA ISA/EISA (DPT PM2011/021/012/022/122/322) support' CONFIG_SCSI_EATA $CONFIG_SCSI
 dep_tristate 'NCR53c406a SCSI support' CONFIG_SCSI_NCR53C406A $CONFIG_SCSI
+bool 'AM53/79C974 PCI SCSI support' CONFIG_SCSI_AM53C974
 #dep_tristate 'SCSI debugging host adapter' CONFIG_SCSI_DEBUG $CONFIG_SCSI
 endmenu

drivers/scsi/Makefile

@@ -121,6 +121,10 @@ else
   endif
 endif
 
+ifeq ($(CONFIG_SCSI_AM53C974),y)
+L_OBJS += AM53C974.o
+endif
+
 ifeq ($(CONFIG_SCSI_BUSLOGIC),y)
 L_OBJS += BusLogic.o
 else

drivers/scsi/README.AM53C974

+SUBJECT
+-------
+AM53/79C974 PC-SCSI Driver
+
+
+DISCLAIMER
+----------
+***  THIS SHOULD BE CONSIDERED AS BETA SOFTWARE  ***
+***  USE AT YOUR OWN RISK!                       ***
+
+
+Copyright
+---------
+The architecture and much of the code of this device driver was 
+originally developed by Drew Eckhardt for the NCR5380. The 
+following copyrights apply:
+
+For the architecture and all pieces of code which can also be found 
+in the NCR5380 device driver:
+Copyright 1993, Drew Eckhardt
+  Visionary Computing 
+  (Unix and Linux consulting and custom programming)
+  drew@colorado.edu
+  +1 (303) 666-5836
+ 
+The AM53C974_nobios_detect code was origininally developed by
+Robin Cutshaw (robin@xfree86.org) and is used here in a 
+slightly modified form.
+ 
+For the remaining code:
+  Copyright 1994, D. Frieauff
+  EMail: fri@rsx42sun0.dofn.de
+  Phone: x49-7545-8-2256 , x49-7541-42305
+
+
+Version
+-------
+AM53/79C974 (PC-SCSI) Linux driver ALPHA release 0.5, 19 November 1995
+
+
+Changelog
+---------
+0.1 -> 0.2: 
+  - Extended message handling re-written to eliminate 'invalid message 17' bug
+  - Parameters of AM53C974_intr adapted
+  - Debug messages structured
+  - Spelling improved
+0.2 -> 0.3:
+  - README file updated -- please read this file up to the end!
+  - Automatic scanning of io_port and irq implemented; no need for BIOS32 
+    anymore
+  - Improved configuration (now via LILO parameter string)
+  - Cleanup of probing and initialisation code
+  - Improved sync. negotiation (can be setup individually for every device)
+  - Improved/ debugged code for reception of ext. messages
+0.3 -> 0.4:
+  - Improved PCI probing and initialisation code
+  - Compatibility changes for Linux 1.3.x
+0.4 -> 0.5:
+  - Compatibility changes for Linux 1.3.42
+
+Bugs & Todo
+-----------
+ - Add proc info function
+ - Support SCSI-2 tagged queuing
+ - Finalize abort code 
+
+Features
+--------
+This driver supports asynchronous and synchronous SCSI-I and SCSI-II devices.
+It is capable of transfer rate and synchronous negotiation (see below).
+The driver supportes scatter-gather. Transfers are DMA based, but do not 
+(yet) make use of the AM53/79C974 MDL mode.
+Max. transfer rate is 10MHz (whatever this is in real life). The transfer
+rate is negotiated with each device (see dmesg output).
+The AM53/79C974 has a 96-byte DMA FIFO to the PCI bus and a 16-byte SCSI
+FIFO. It provides active negation and glitch suppression functions.
+Burst DMA transfer rate is 132 MBytes/sec.
+
+
+Configuration
+-------------
+The following communication characteristics can be set individually  for every
+SCSI device on the bus:
+  - enable/disable sync. negotiation
+  - transfer rate
+  - asynchronous or synchronous communication
+  - in case of sync. communication, the sync. offset
+
+The sync. offset specifies the number of bytes that can be sent or 
+reveived from the SCSI bus without ACK resp. REQ signal.
+CAUTION: USING SYNCHRONOUS MODE ON LONG SCSI CABLES MAY CAUSE 
+         COMMUNICATION PROBLEMS LEADING TO LOSS OF DATA. 
+
+The default setting of the SCSI communication parameters is as follows:
+  - no negotiation
+  - 5.0 MHz transfer rate
+  - asynchronous mode
+  - zero offset
+The parameters can be modified by passing a string with the following syntax to 
+the kernel: AM53C974=host-scsi-id,target-scsi-id,max-rate,max-offset
+The parameters will be used by the driver as negotiation basis.
+The range of the rate parameter is 3 to 10 MHz.
+The range of the sync. offset parameter is 0 to 15 bytes. A value of 0 denotes 
+asynchronous comm. mode.
+If the target cannot cope with the specified transfer rate, sync. mode or sync.
+offset, the negotiation result will differ from the specified values.
+The negotiation result is printed out at the end of the negotiation process
+(to read it, use the dmesg program or the appropriate syslog).
+The parameter strings (blank separated) can be passed to the kernel at the
+LILO prompt, or as part of the LILO configuration file.
+
+For example, the string "AM53C974=7,2,8,15" would be interpreted as follows:
+ "For communication between the controller with SCSI-ID 7 and the device with
+ SCSI-ID 2 a transfer rate of 8MHz in synchronous mode with max. 15 bytes offset
+ should be negotiated".
+
+As an example, here my LILO configuration file:
+  boot = /dev/sda
+  compact
+  #prompt
+  delay = 50	# optional, for systems that boot very quickly
+  vga = normal	# force sane state
+  ramdisk = 0	# paranoia setting
+  root = current  # use "current" root
+  image = /usr/src/linux/arch/i386/boot/zImage
+    label = linux
+    append = "AM53C974=7,0,10,0 AM53C974=7,1,10,0 AM53C974=7,2,10,15 AM53C974=7,4,10,0 AM53C974=7,5,10,0"
+    read-only
+  other = /dev/sda4
+    label = os2
+  other = /dev/sdb3
+    loader = /boot/any_d.b
+    table = /dev/sdb
+    label = setup
+
+The same parameters at the LILO prompt:
+  LILO boot: linux AM53C974=7,0,10,0 AM53C974=7,1,10,0 AM53C974=7,2,10,15 AM53C974=7,4,10,0 AM53C974=7,5,10,0
+
+You can override parameters specified in the LILO configuration file by 
+parameters specified on the LILO command line.
+
+
+BIOS usage
+----------
+Version 0.4 of the driver will use the BIOS, if available. Otherwise
+it will try its internal PCI scan and access routines.
+The driver assumes that the controller's SCSI-ID (usually 7) has been
+correctly loaded by the BIOS into the controller's register during
+system boot. If the driver detects that the controller's SCSI ID is not 
+'7' it will print out a warning. If this happens to you please correct
+seeting of the controller's SCSI-ID. If it is wrong, then edit the 
+AM53C974_SCSI_ID definition in file AM53C974.h accordingly.
+
+
+Test environment
+----------------
+This driver was tested on a Compaq XL566 with the following SCSI configuration:
+2 x HP C2247 fixed disk (internal, rate=10MHz, async.)
+1 x Micropolis 1624 fixed disk (external, rate=8MHz, sync., offset=15 bytes)
+1 x Wangtek W5525ES cartridge streamer (internal, rate=5MHz, async.)
+1 x Toshiba XM-3301B CD-ROM (external, rate=5MHz, async.)
+
+
+Known problems
+--------------
+ - Compaq/Matsushita CD-ROM:
+   Use of this device with AM53C974 driver version 0.2 caused the kernel to
+   hang during Linux boot. If you encounter the problem, don't enable sync.
+   negotiation with the CD-ROM, i.e. simply don't specify comm. parameters 
+   for this device on the LILO commandline or configuration file. 
+   The driver will thus use its default for the CD-ROM, which is 5MHz 
+   transfer rate asynch and no sync. negotiation.
+ - Some disks cause problems.
+
+
+What to do if there is a SCSI problem possibly related to the driver
+--------------------------------------------------------------------
+Read Klaus Liedl's WWW page (http://www-c724.uibk.ac.at/XL/).
+In case this does not help:
+Send me a complete description of the problem, including your SCSI 
+configuration plus as much debugging information as possible. 
+Don't wait until I ask you for this information. To enable the 
+generation of debugging output, remove the comments from the following 
+definitions in the AM53C974.h file:
+    AM53C974_DEBUG
+    AM53C974_DEBUG_MSG
+    AM53C974_DEBUG_KEYWAIT
+    AM53C974_DEBUG_INFO
+    AM53C974_DEBUG_INTR
+With these definitions enabled, the driver will enter single-step mode during 
+Linux boot. Use the spacebar for stepping.
+Take note of at least the last 10 printout sections (marked by dashes) before 
+the crash/hangup or whatever happens and send me all of this information via 
+email. If the system can boot, use the syslogd daemon to record the debugging 
+output. Maybe you can use the ramdisk for this purpose too (if necessary, kindly
+ask K. Liedl (Klaus.Liedl@uibk.ac.at) for support, he knows how to do it -- 
+I never tried). Stay in email contact with me. Be aware that the following 
+weeks/months could be the worst of your life.
+Note: If single-stepping takes up too much time, you can try to let the driver 
+catch the problem by pressing the 'r' key. The driver will automatically enter
+single-step mode if it has detected something weird.
+
+
+Author's Contact Adress
+-----------------------
+Email: fri@rsx42sun0.dofn.de
+Phone: x49-7545-2256 (office), x49-7541-42305 (home)
+Home address: D. Frieauff, Stockerholzstr. 27, 88048 Friedrichshafen, Germany
+
+
+!!!! Important Notice !!!!
+-----------------------------
+- Klaus Liedl maintains an excellent WWW page about Linux on Compaq XL.
+  It includes an FAQ, lots of tips & tricks as well as downloadable 
+  boot disk images. The URL is: http://www-c724.uibk.ac.at/XL/
+- Volunteer wanted for further maintenance of this driver software. I
+  don't have the time anymore to do serious support as some of you will know.
+
+Literature
+----------
+ - AMD AM53C974 PC-SCSI Technical Manual, publication #18624B
+ - Amendment to the AMD AM53C974 PC-SCSI Technical Manual
+ - AMD AM79C974 PC-NET Datasheet, publication #18681
+ - Amendment to the AMD AM79C974 PC-NET Datasheet
+
+
+THANKS to
+---------
+ - Drew Eckhardt, Robin Cutshaw, K. Liedl, Robert J. Pappas, A. Grenier, 
+   Mark Stockton, David C. Niemi, Ben Craft, and many others who have helped
+

drivers/scsi/aha152x.c

@@ -20,9 +20,12 @@
  * General Public License for more details.
  *
  *
- * $Id: aha152x.c,v 1.13 1996/01/09 02:15:53 fischer Exp $
+ * $Id: aha152x.c,v 1.14 1996/01/17 15:11:20 fischer Exp fischer $
  *
  * $Log: aha152x.c,v $
+ * Revision 1.14  1996/01/17  15:11:20  fischer
+ * - fixed lockup in MESSAGE IN phase after reconnection
+ *
  * Revision 1.13  1996/01/09  02:15:53  fischer
  * - some cleanups
  * - moved request_irq behind controller initialization
@@ -1402,8 +1405,6 @@ void aha152x_intr(int irqno, struct pt_regs * regs)
           aha152x_panic(shpnt, "unknown lun");
 	}
 
-      make_acklow(shpnt);
-      getphase(shpnt);
 
 #if defined(DEBUG_QUEUES)
       if(HOSTDATA(shpnt)->debug & debug_queues)
@@ -1430,6 +1431,8 @@ void aha152x_intr(int irqno, struct pt_regs * regs)
       CURRENT_SC->SCp.phase &= ~disconnected;
       restore_flags(flags);
 
+      make_acklow(shpnt);
+      if(getphase(shpnt)!=P_MSGI) {
       SETPORT(SIMODE0, 0);
       SETPORT(SIMODE1, ENPHASEMIS|ENBUSFREE);
 #if defined(DEBUG_RACE)
@@ -1438,6 +1441,7 @@ void aha152x_intr(int irqno, struct pt_regs * regs)
       SETBITS(DMACNTRL0, INTEN);
       return;
     }
+    }
   
   /* Check, if we aren't busy with a command */
   if(!CURRENT_SC)
@@ -1946,6 +1950,7 @@ void aha152x_intr(int irqno, struct pt_regs * regs)
 	    printk("d+, ");
 #endif
             append_SC(&DISCONNECTED_SC, CURRENT_SC);
+            CURRENT_SC->SCp.phase |= 1<<16;
             CURRENT_SC = NULL;
 	  restore_flags(flags);
 

drivers/scsi/aha152x.h

@@ -2,7 +2,7 @@
 #define _AHA152X_H
 
 /*
- * $Id: aha152x.h,v 1.13 1995/12/16 12:27:23 fischer Exp $
+ * $Id: aha152x.h,v 1.14 1996/01/17 15:13:36 fischer Exp fischer $
  */
 
 #if defined(__KERNEL__)
@@ -23,7 +23,7 @@ int aha152x_proc_info(char *buffer, char **start, off_t offset, int length, int
    (unless we support more than 1 cmd_per_lun this should do) */
 #define AHA152X_MAXQUEUE	7		
 
-#define AHA152X_REVID "Adaptec 152x SCSI driver; $Revision: 1.13 $"
+#define AHA152X_REVID "Adaptec 152x SCSI driver; $Revision: 1.14 $"
 
 extern struct proc_dir_entry proc_scsi_aha152x;
 

drivers/scsi/hosts.c

@@ -125,6 +125,10 @@
 #include "NCR53c406a.h"
 #endif
 
+#ifdef CONFIG_SCSI_AM53C974
+#include "AM53C974.h"
+#endif
+
 #ifdef CONFIG_SCSI_DEBUG
 #include "scsi_debug.h"
 #endif
@@ -226,6 +230,9 @@ static Scsi_Host_Template builtin_scsi_hosts[] =
 #ifdef CONFIG_SCSI_EATA
     EATA,
 #endif
+#ifdef CONFIG_SCSI_AM53C974
+    AM53C974,
+#endif
 #ifdef CONFIG_SCSI_DEBUG
     SCSI_DEBUG,
 #endif

drivers/sound/sb16_dsp.c

@@ -410,8 +410,8 @@ sb16_dsp_prepare_for_input (int dev, int bsize, int bcount)
   audio_devs[my_dev]->dmachan1 = dsp_16bit ? dma16 : dma8;
   dsp_count = 0;
   dsp_cleanup ();
-  sb_dsp_command (0xd0);	/* Halt DMA until trigger() is called */
   trigger_bits = 0;
+  sb_dsp_command (0xd4);
   return 0;
 }
 
@@ -421,20 +421,14 @@ sb16_dsp_prepare_for_output (int dev, int bsize, int bcount)
   audio_devs[my_dev]->dmachan1 = dsp_16bit ? dma16 : dma8;
   dsp_count = 0;
   dsp_cleanup ();
-  sb_dsp_command (0xd0);	/* Halt DMA until trigger() is called */
   trigger_bits = 0;
+  sb_dsp_command (0xd4);
   return 0;
 }
 
 static void
 sb16_dsp_trigger (int dev, int bits)
 {
-  if (bits != 0)
-    bits = 1;
-
-  if (bits == trigger_bits)	/* No change */
-    return;
-
   trigger_bits = bits;
 
   if (!bits)

drivers/sound/sb_dsp.c

@@ -1378,26 +1378,23 @@ Jazz16_set_dma16 (int dma)
   initialize_ProSonic16 ();
 }
 
-long
-sb_dsp_init (long mem_start, struct address_info *hw_config)
+static void
+dsp_get_vers (struct address_info *hw_config)
 {
   int             i;
-  int             ess_major = 0, ess_minor = 0;
 
-  int             mixer_type = 0;
+  unsigned long   flags;
 
+  save_flags (flags);
+  cli ();
   sb_osp = hw_config->osp;
   sbc_major = sbc_minor = 0;
-  sb_dsp_command (0xe1);	/*
-				 * Get version
-				 */
+  sb_dsp_command (0xe1);	/* Get version */
 
-  for (i = 1000; i; i--)
+  for (i = 100000; i; i--)
     {
       if (inb (DSP_DATA_AVAIL) & 0x80)
-	{			/*
-				 * wait for Data Ready
-				 */
+	{
 	  if (sbc_major == 0)
 	    sbc_major = inb (DSP_READ);
 	  else
@@ -1407,10 +1404,28 @@ sb_dsp_init (long mem_start, struct address_info *hw_config)
 	    }
 	}
     }
+  restore_flags (flags);
+}
+
+long
+sb_dsp_init (long mem_start, struct address_info *hw_config)
+{
+  int             i;
+  int             ess_major = 0, ess_minor = 0;
+
+  int             mixer_type = 0;
+
+  dsp_get_vers (hw_config);
+
+  if (sbc_major == 0)
+    {
+      sb_reset_dsp ();
+      dsp_get_vers (hw_config);
+    }
 
   if (sbc_major == 0)
     {
-      printk ("\n\nFailed to get SB version (%x) - possible I/O conflict\n\n",
+      printk ("\n\nFailed to get SB version (%x) - possible I/O conflict?\n\n",
 	      inb (DSP_DATA_AVAIL));
       sbc_major = 1;
     }

fs/buffer.c

@@ -998,13 +998,12 @@ static inline void recover_reusable_buffer_heads(void)
 	unsigned long flags;
 	
 	save_flags(flags);
-	cli();
 	while (reuse_list) {
+		cli();
 		bh = reuse_list;
 		reuse_list = bh->b_next_free;
 		restore_flags(flags);
 		put_unused_buffer_head(bh);
-		cli();
 	}
 }
 
@@ -1062,7 +1061,7 @@ static struct buffer_head * create_buffers(unsigned long page, unsigned long siz
 	return NULL;
 }
 
-static int bread_page(unsigned long address, kdev_t dev, int b[], int size)
+int brw_page(int rw, unsigned long address, kdev_t dev, int b[], int size, int bmap)
 {
 	struct buffer_head *bh, *prev, *next, *arr[MAX_BUF_PER_PAGE];
 	int block, nr;
@@ -1085,35 +1084,55 @@ static int bread_page(unsigned long address, kdev_t dev, int b[], int size)
 		next->b_blocknr = block;
 		next->b_count = 1;
 		next->b_flushtime = 0;
-		clear_bit(BH_Dirty, &next->b_state);
-		clear_bit(BH_Req, &next->b_state);
 		set_bit(BH_Uptodate, &next->b_state);
 
-		if (!block) {
+		/* When we use bmap, we define block zero to represent
+                   a hole.  ll_rw_page, however, may legitimately
+                   access block zero, and we need to distinguish the
+                   two cases. 
+		   */
+		if (bmap && !block) {
 			memset(next->b_data, 0, size);
+			next->b_count--;
 			continue;
 		}
 		tmp = get_hash_table(dev, block, size);
 		if (tmp) {
 			if (!buffer_uptodate(tmp)) {
+				if (rw == READ)
 					ll_rw_block(READ, 1, &tmp);
 				wait_on_buffer(tmp);
 			}
+			if (rw == READ) 
 				memcpy(next->b_data, tmp->b_data, size);
+			else {
+				memcpy(tmp->b_data, next->b_data, size);
+				set_bit(BH_Dirty, &tmp->b_state);
+			}
 			brelse(tmp);
+			next->b_count--;
 			continue;
 		}
+		if (rw == READ)
 			clear_bit(BH_Uptodate, &next->b_state);
+		else
+			set_bit(BH_Dirty, &next->b_state);
 		arr[nr++] = next;
 	} while (prev = next, (next = next->b_this_page) != NULL);
 	prev->b_this_page = bh;
 	
 	if (nr)
-		ll_rw_block(READ, nr, arr);
+		ll_rw_block(rw, nr, arr);
 	else {
 		page->locked = 0;
 		page->uptodate = 1;
 		wake_up(&page->wait);
+		next = bh;
+		do {
+			next->b_next_free = reuse_list;
+			reuse_list = next;
+			next = next->b_this_page;
+		} while (next != bh);
 	}
 	++current->maj_flt;
 	return 0;
@@ -1138,6 +1157,64 @@ void mark_buffer_uptodate(struct buffer_head * bh, int on)
 		clear_bit(BH_Uptodate, &bh->b_state);
 }
 
+void unlock_buffer(struct buffer_head * bh)
+{
+	struct buffer_head *tmp;
+	unsigned long flags;
+	struct page *page;
+
+	clear_bit(BH_Lock, &bh->b_state);
+	wake_up(&bh->b_wait);
+
+	if (!test_bit(BH_FreeOnIO, &bh->b_state))
+		return;
+	page = mem_map + MAP_NR(bh->b_data);
+	if (!page->locked) {
+		printk ("Whoops: unlock_buffer: "
+			"async io complete on unlocked page\n");
+		return;
+	}
+	if (bh->b_count != 1) {
+		printk ("Whoops: unlock_buffer: b_count != 1 on async io.\n");
+		return;
+	}
+	/* Async buffer_heads are here only as labels for IO, and get
+           thrown away once the IO for this page is complete.  IO is
+           deemed complete once all buffers have been visited
+           (b_count==0) and are now unlocked. */
+	bh->b_count--;
+	for (tmp = bh; tmp=tmp->b_this_page, tmp!=bh; ) {
+		if (test_bit(BH_Lock, &tmp->b_state) || tmp->b_count)
+			return;
+	}
+
+	/* OK, go ahead and complete the async IO on this page. */
+	save_flags(flags);
+	page->locked = 0;
+	wake_up(&page->wait);
+	cli();
+	tmp = bh;
+	do {
+		if (!test_bit(BH_FreeOnIO, &tmp->b_state)) {
+			printk ("Whoops: unlock_buffer: "
+				"async IO mismatch on page.\n");
+			restore_flags(flags);
+			return;
+		}
+		tmp->b_next_free = reuse_list;
+		reuse_list = tmp;
+		clear_bit(BH_FreeOnIO, &tmp->b_state);
+		tmp = tmp->b_this_page;
+	} while (tmp != bh);
+	restore_flags(flags);
+	if (page->free_after) {
+		extern int nr_async_pages;
+		nr_async_pages--;
+		page->free_after = 0;
+		free_page(page_address(page));
+	}
+}
+
 /*
  * Generic "readpage" function for block devices that have the normal
  * bmap functionality. This is most of the block device filesystems.
@@ -1167,38 +1244,11 @@ int generic_readpage(struct inode * inode, struct page * page)
 	/* IO start */
 	page->count++;
 	address = page_address(page);
-	bread_page(address, inode->i_dev, nr, inode->i_sb->s_blocksize);
+	brw_page(READ, address, inode->i_dev, nr, inode->i_sb->s_blocksize, 1);
 	free_page(address);
 	return 0;
 }
 
-#if 0
-/*
- * bwrite_page writes a page out to the buffer cache and/or the physical device.
- * It's used for mmap writes (the same way bread_page() is used for mmap reads).
- */
-void bwrite_page(unsigned long address, kdev_t dev, int b[], int size)
-{
-	struct buffer_head * bh[MAX_BUF_PER_PAGE];
-	int i, j;
-
- 	for (i=0, j=0; j<PAGE_SIZE ; i++, j+= size) {
-		bh[i] = NULL;
-		if (b[i])
-			bh[i] = getblk(dev, b[i], size);
-	}
- 	for (i=0, j=0; j<PAGE_SIZE ; i++, j += size, address += size) {
-		if (bh[i]) {
-			memcpy(bh[i]->b_data, (void *) address, size);
-			mark_buffer_uptodate(bh[i], 1);
-			mark_buffer_dirty(bh[i], 0);
-			brelse(bh[i]);
-		} else
-			memset((void *) address, 0, size); /* ???!?!! */
-	}	
-}
-#endif
-
 /*
  * Try to increase the number of buffers available: the size argument
  * is used to determine what kind of buffers we want.

fs/proc/procfs_syms.c

-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 
+/*
+ * This is all required so that if we load all of scsi as a module,
+ * that the scsi code will be able to talk to the /proc/scsi handling
+ * in the procfs.
+ */
+extern int (* dispatch_scsi_info_ptr) (int ino, char *buffer, char **start,
+				off_t offset, int length, int inout);
+extern struct inode_operations proc_scsi_inode_operations;
+
 static struct symbol_table procfs_syms = {
 /* Should this be surrounded with "#ifdef CONFIG_MODULES" ? */
 #include <linux/symtab_begin.h>
@@ -12,11 +20,14 @@ static struct symbol_table procfs_syms = {
 	X(generate_cluster),
 	X(proc_net_inode_operations),
 	X(proc_net),
-#ifdef CONFIG_SCSI /* Ugh... */
+
+	/*
+	 * This is required so that if we load scsi later, that the
+	 * scsi code can attach to /proc/scsi in the correct manner.
+	 */
 	X(proc_scsi),
 	X(proc_scsi_inode_operations),
 	X(dispatch_scsi_info_ptr),
-#endif
 #include <linux/symtab_end.h>
 };
 

fs/proc/root.c

@@ -297,11 +297,7 @@ void proc_root_init(void)
 		64, &proc_self_inode_operations,
 	});
 	proc_register(&proc_root, &proc_net);
-
-#ifdef CONFIG_SCSI
 	proc_register(&proc_root, &proc_scsi);
-#endif
-
 	proc_register(&proc_root, &proc_sys_root);
 
 #ifdef CONFIG_DEBUG_MALLOC

include/linux/blk.h

@@ -13,14 +13,14 @@
 #define NR_REQUEST	64
 
 /*
- * This is used in the elevator algorithm: Note that
- * reads always go before writes. This is natural: reads
- * are much more time-critical than writes.
+ * This is used in the elevator algorithm.  We don't prioritise reads
+ * over writes any more --- although reads are more time-critical than
+ * writes, by treating them equally we increase filesystem throughput.
+ * This turns out to give better overall performance.  -- sct
  */
 #define IN_ORDER(s1,s2) \
-((s1)->cmd < (s2)->cmd || ((s1)->cmd == (s2)->cmd && \
 ((s1)->rq_dev < (s2)->rq_dev || (((s1)->rq_dev == (s2)->rq_dev && \
-(s1)->sector < (s2)->sector)))))
+(s1)->sector < (s2)->sector)))
 
 /*
  * These will have to be changed to be aware of different buffer

include/linux/fs.h

@@ -598,8 +598,8 @@ extern struct buffer_head * breada(kdev_t dev,int block, int size,
 extern int generic_readpage(struct inode *, struct page *);
 extern int generic_file_read(struct inode *, struct file *, char *, int);
 extern int generic_mmap(struct inode *, struct file *, struct vm_area_struct *);
+extern int brw_page(int, unsigned long, kdev_t, int [], int, int);
 
-extern void bwrite_page(unsigned long addr,kdev_t dev,int b[],int size);
 extern void put_super(kdev_t dev);
 unsigned long generate_cluster(kdev_t dev, int b[], int size);
 extern kdev_t ROOT_DEV;

include/linux/locks.h

@@ -4,6 +4,9 @@
 #ifndef _LINUX_MM_H
 #include <linux/mm.h>
 #endif
+#ifndef _LINUX_PAGEMAP_H
+#include <linux/pagemap.h>
+#endif
 
 /*
  * Unlocked, temporary IO buffer_heads gets moved to the reuse_list
@@ -29,39 +32,8 @@ extern inline void lock_buffer(struct buffer_head * bh)
 		__wait_on_buffer(bh);
 }
 
-extern inline void unlock_buffer(struct buffer_head * bh)
-{
-	struct buffer_head *tmp = bh;
-	int page_locked = 0;
-	unsigned long flags;
+void unlock_buffer(struct buffer_head *);
 
-	clear_bit(BH_Lock, &bh->b_state);
-	wake_up(&bh->b_wait);
-	do {
-		if (test_bit(BH_Lock, &tmp->b_state)) {
-			page_locked = 1;
-			break;
-		}
-		tmp=tmp->b_this_page;
-	} while (tmp && tmp != bh);
-	save_flags(flags);
-	if (!page_locked) {
-		struct page *page = mem_map + MAP_NR(bh->b_data);
-		page->locked = 0;
-		wake_up(&page->wait);
-		tmp = bh;
-		cli();
-		do {
-			if (test_bit(BH_FreeOnIO, &tmp->b_state)) {
-				tmp->b_next_free = reuse_list;
-				reuse_list = tmp;
-				clear_bit(BH_FreeOnIO, &tmp->b_state);
-			}
-			tmp = tmp->b_this_page;
-		} while (tmp && tmp != bh);
-		restore_flags(flags);
-	}
-}
 
 /*
  * super-block locking. Again, interrupts may only unlock

include/linux/mm.h

@@ -122,7 +122,8 @@ typedef struct page {
 		 error:1,
 		 referenced:1,
 		 locked:1,
-		 unused:3,
+		 free_after:1,
+		 unused:2,
 		 reserved:1;
 	struct wait_queue *wait;
 	struct page *next;

include/linux/proc_fs.h

@@ -118,6 +118,7 @@ enum scsi_directory_inos {
 	PROC_SCSI_ULTRASTOR,
 	PROC_SCSI_7000FASST,
 	PROC_SCSI_EATA2X,
+	PROC_SCSI_AM53C974,
 	PROC_SCSI_SSC,
 	PROC_SCSI_SCSI_DEBUG,	
 	PROC_SCSI_NOT_PRESENT,

include/linux/swap.h

@@ -12,6 +12,8 @@
 #define SWP_USED	1
 #define SWP_WRITEOK	3
 
+#define SWAP_CLUSTER_MAX 32
+
 struct swap_info_struct {
 	unsigned int flags;
 	kdev_t swap_device;
@@ -20,6 +22,8 @@ struct swap_info_struct {
 	unsigned char * swap_lockmap;
 	int lowest_bit;
 	int highest_bit;
+	int cluster_next;
+	int cluster_nr;
 	int prio;			/* swap priority */
 	int pages;
 	unsigned long max;
@@ -28,6 +32,7 @@ struct swap_info_struct {
 
 extern int nr_swap_pages;
 extern int nr_free_pages;
+extern int nr_async_pages;
 extern int min_free_pages;
 extern int free_pages_low;
 extern int free_pages_high;
@@ -40,17 +45,17 @@ struct sysinfo;
 /* linux/ipc/shm.c */
 extern int shm_swap (int, unsigned long);
 
-/* linux/mm/swap_clock.c */
-extern int try_to_free_page(int, unsigned long);
+/* linux/mm/vmscan.c */
+extern int try_to_free_page(int, unsigned long, int);
 
-/* linux/mm/swap_io.c */
-extern void rw_swap_page(int, unsigned long, char *);
+/* linux/mm/page_io.c */
+extern void rw_swap_page(int, unsigned long, char *, int);
 #define read_swap_page(nr,buf) \
-	rw_swap_page(READ,(nr),(buf))
+	rw_swap_page(READ,(nr),(buf),1)
 #define write_swap_page(nr,buf) \
-	rw_swap_page(WRITE,(nr),(buf))
+	rw_swap_page(WRITE,(nr),(buf),1)
 
-/* linux/mm/swap_mman.c */
+/* linux/mm/page_alloc.c */
 extern void swap_in(struct task_struct *, struct vm_area_struct *,
 		    pte_t *, unsigned long, int);
 

init/main.c

@@ -70,6 +70,7 @@ extern void generic_NCR5380_setup(char *str, int *intr);
 extern void aha152x_setup(char *str, int *ints);
 extern void aha1542_setup(char *str, int *ints);
 extern void aic7xxx_setup(char *str, int *ints);
+extern void AM53C974_setup(char *str, int *ints);
 extern void BusLogic_Setup(char *str, int *ints);
 extern void fdomain_setup(char *str, int *ints);
 extern void NCR53c406a_setup(char *str, int *ints);
@@ -239,6 +240,9 @@ struct {
 #ifdef CONFIG_SCSI_BUSLOGIC
 	{ "BusLogic=", BusLogic_Setup},
 #endif
+#ifdef CONFIG_SCSI_AM53C974
+        { "AM53C974=", AM53C974_setup},
+#endif
 #ifdef CONFIG_SCSI_NCR53C406A
 	{ "ncr53c406a=", NCR53c406a_setup},
 #endif

kernel/ksyms.c

@@ -86,19 +86,6 @@ extern unsigned char aux_device_present, kbd_read_mask;
 #include <linux/smp.h>
 #endif
 
-#ifndef CONFIG_SCSI
-#if defined(CONFIG_PROC_FS)
-/*
- * This is all required so that if we load all of scsi as a module,
- * that the scsi code will be able to talk to the /proc/scsi handling
- * in the procfs.
- */
-extern int (* dispatch_scsi_info_ptr) (int ino, char *buffer, char **start,
-				off_t offset, int length, int inout);
-extern struct inode_operations proc_scsi_inode_operations;
-#endif
-#endif
-
 extern char *get_options(char *str, int *ints);
 extern void set_device_ro(int dev,int flag);
 extern struct file_operations * get_blkfops(unsigned int);
@@ -210,6 +197,7 @@ struct symbol_table symbol_table = {
 	X(__bforget),
 	X(ll_rw_block),
 	X(__wait_on_buffer),
+	X(unlock_buffer),
 	X(dcache_lookup),
 	X(dcache_add),
 	X(aout_core_dump),
@@ -435,14 +423,6 @@ struct symbol_table symbol_table = {
 	 */
 	X(gendisk_head),
 	X(resetup_one_dev),
-#if defined(CONFIG_PROC_FS)
-	/*
-	 * This is required so that if we load scsi later, that the
-	 * scsi code can attach to /proc/scsi in the correct manner.
-	 */
-	X(proc_scsi_inode_operations),
-	X(dispatch_scsi_info_ptr),
-#endif
 #endif
 	/* Added to make file system as module */
 	X(set_writetime),

mm/filemap.c

@@ -168,8 +168,7 @@ void update_vm_cache(struct inode * inode, unsigned long pos, const char * buf,
 	if (page) {
 		unsigned long addr;
 
-		if (!page->uptodate)
-			sleep_on(&page->wait);
+		wait_on_page(page);
 		addr = page_address(page);
 		memcpy((void *) ((pos & ~PAGE_MASK) + addr), buf, count);
 		free_page(addr);

mm/page_alloc.c

@@ -181,7 +181,7 @@ unsigned long __get_free_pages(int priority, unsigned long order, unsigned long
 		return 0;
 	}
 	restore_flags(flags);
-	if (priority != GFP_BUFFER && try_to_free_page(priority, limit))
+	if (priority != GFP_BUFFER && try_to_free_page(priority, limit, 1))
 		goto repeat;
 	return 0;
 }

mm/page_io.c

@@ -28,10 +28,11 @@
 
 static struct wait_queue * lock_queue = NULL;
 
-void rw_swap_page(int rw, unsigned long entry, char * buf)
+void rw_swap_page(int rw, unsigned long entry, char * buf, int wait)
 {
 	unsigned long type, offset;
 	struct swap_info_struct * p;
+	struct page *page;
 	
 	type = SWP_TYPE(entry);
 	if (type >= nr_swapfiles) {
@@ -58,8 +59,17 @@ void rw_swap_page(int rw, unsigned long entry, char * buf)
 		kstat.pswpin++;
 	else
 		kstat.pswpout++;
+	page = mem_map + MAP_NR(buf);
+	wait_on_page(page);
 	if (p->swap_device) {
+		if (!wait) {
+			page->count++;
+			page->free_after = 1;
+			nr_async_pages++;
+		}
 		ll_rw_page(rw,p->swap_device,offset,buf);
+		if (wait)
+			wait_on_page(page);
 	} else if (p->swap_file) {
 		struct inode *swapf = p->swap_file;
 		unsigned int zones[PAGE_SIZE/512];
@@ -105,4 +115,3 @@ void rw_swap_page(int rw, unsigned long entry, char * buf)
 		printk("rw_swap_page: lock already cleared\n");
 	wake_up(&lock_queue);
 }
-

mm/swap.c

@@ -42,6 +42,10 @@ int min_free_pages = 20;
 int free_pages_low = 30;
 int free_pages_high = 40;
 
+/* We track the number of pages currently being asynchronously swapped
+   out, so that we don't try to swap TOO many pages out at once */
+int nr_async_pages = 0;
+
 /*
  * Constants for the page aging mechanism: the maximum age (actually,
  * the maximum "youthfulness"); the quanta by which pages rejuvinate

scripts/Configure

@@ -263,7 +263,8 @@ function int () {
         while :; do
           readln "$1 ($2) [$def] " "$def"
           case "$ans" in
-             [1-9] | [1-9][0-9] | [1-9][0-9][0-9] | [1-9][0-9][0-9][0-9] ) 
+             -1 | [1-9] | [1-9][0-9] |\
+             [1-9][0-9][0-9] | [1-9][0-9][0-9][0-9] | [1-9][0-9][0-9][0-9][0-9]) 
                  define_int "$2" "$ans"
                  break;;
              * ) help "$2"
@@ -278,7 +279,7 @@ function int () {
 #
 function define_hex () {
 	echo "$1=$2" >>$CONFIG
-	echo "#define $1 0x$2" >>$CONFIG_H
+	echo "#define $1 0x${2#*[x,X]}" >>$CONFIG_H
 	eval "$1=$2"
 }
 
@@ -289,10 +290,15 @@ function define_hex () {
 #
 function hex () {
 	def=$(eval echo "\${$2:-$3}")
+	def=${def#*[x,X]}
         while :; do
           readln "$1 ($2) [$def] " "$def"
+          ans=${ans#*[x,X]}
           case "$ans" in
-             [1-9] | [1-9][0-9] | [1-9][0-9][0-9] | [1-9][0-9][0-9][0-9] ) 
+             [0-9,a-f,A-F] |\
+             [0-9,a-f,A-F][0-9,a-f,A-F] |\
+             [0-9,a-f,A-F][0-9,a-f,A-F][0-9,a-f,A-F] |\
+             [0-9,a-f,A-F][0-9,a-f,A-F][0-9,a-f,A-F][0-9,a-f,A-F])\
                  define_hex "$2" "$ans"
                  break;;
              * ) help "$2"