Import 0.99.14b

Makefile

 VERSION = 0.99
 PATCHLEVEL = 14
-ALPHA = a
+ALPHA = b
 
 all:	Version zImage
 
@@ -149,12 +149,14 @@ init/main.o: $(CONFIGURE) init/main.c
 	$(CC) $(CFLAGS) $(PROFILING) -c -o $*.o $<
 
 tools/system:	boot/head.o init/main.o tools/version.o linuxsubdirs
-	$(LD) $(LDFLAGS) -T 1000 -M boot/head.o init/main.o tools/version.o \
+	$(LD) $(LDFLAGS) -T 1000 boot/head.o init/main.o tools/version.o \
 		$(ARCHIVES) \
 		$(FILESYSTEMS) \
 		$(DRIVERS) \
 		$(LIBS) \
-		-o tools/system > System.map
+		-o tools/system
+	nm tools/zSystem | grep -v '\(compiled\)\|\(\.o$$\)\|\( a \)' | \
+		sort > System.map
 
 boot/setup: boot/setup.s
 	$(AS86) -o boot/setup.o boot/setup.s
@@ -187,12 +189,14 @@ zlilo: $(CONFIGURE) zImage
 
 
 tools/zSystem:	boot/head.o init/main.o tools/version.o linuxsubdirs
-	$(LD) $(LDFLAGS) -T 100000 -M boot/head.o init/main.o tools/version.o \
+	$(LD) $(LDFLAGS) -T 100000 boot/head.o init/main.o tools/version.o \
 		$(ARCHIVES) \
 		$(FILESYSTEMS) \
 		$(DRIVERS) \
 		$(LIBS) \
-		-o tools/zSystem > zSystem.map
+		-o tools/zSystem
+	nm tools/zSystem | grep -v '\(compiled\)\|\(\.o$$\)\|\( a \)' | \
+		sort > zSystem.map
 
 fs: dummy
 	$(MAKE) linuxsubdirs SUBDIRS=fs

README

 
-	Linux kernel release 0.99 patchlevel 13
+	Linux kernel release 0.99 patchlevel 14
 
-[ Just to show everybody that I have no personal integrity at all, this
-release is dedicated to Martin Mueller and Sebastian Hetze just because
-they wrote the German Linux Anwenderhandbuch.  The fact that they sent
-me some of the money they made on selling it has nothing at all to do
-with the dedication.  Oh, no.  That would be crass.  ]
-
-These are the release notes for linux version 0.99.13.  Read them
+These are the release notes for linux version 0.99.14.  Read them
 carefully, as they tell you what's new, explain how to install the
 kernel, and what to do if something goes wrong. 
 
-NOTE! There has been some indication that gcc versions older than 2.4.5
-result in bad kernels being built: 2.3.3 will fail even to build the
-kernel, and I have at least one report of trouble with a 2.4.3-built
-kernel that went away when the kernel was recompiled with 2.4.5. 
-
 INSTALLING the kernel:
 
- - if you install by patching, you need a *clean* 0.99.12 source tree,
+ - if you install by patching, you need a *clean* 0.99.13 source tree,
    which presumably exists in /usr/src/linux.  If so, to get the kernel
    patched, just do a
 
 		cd /usr/src
-		patch -p0 < linux-0.99.patch13
+		patch -p0 < linux-0.99.patch14
 
    and you should be ok.  You may want to remove the backup files (xxx~
    or xxx.orig), and make sure that there are no failed patches (xxx# or
@@ -32,7 +21,7 @@ INSTALLING the kernel:
  - If you install the full sources, do a
 
 		cd /usr/src
-		tar xvf linux-0.99.13.tar
+		tar xvf linux-0.99.14.tar
 
    to get it all put in place.
 

drivers/sound/sb_dsp.c

@@ -433,12 +433,14 @@ sb_dsp_prepare_for_output (int dev, int bsize, int bcount)
   dsp_cleanup ();
   dsp_speaker (ON);
 
+#ifndef EXCLUDE_SBPRO
   if (major == 3)	/* SB Pro */
   {
     sb_mixer_set_stereo(dsp_stereo);
     dsp_speed (dsp_current_speed);/* Speed must be recalculated if #channels
 				   * changes */
   }
+#endif
   return 0;
 }
 

fs/block_dev.c

@@ -82,7 +82,7 @@ int block_read(struct inode * inode, struct file * filp, char * buf, int count)
 	int blocksize;
 	int blocksize_bits, i;
 	unsigned int left;
-	int blocks;
+	unsigned int blocks;
 	int bhrequest, uptodate;
 	struct buffer_head ** bhb, ** bhe;
 	struct buffer_head * buflist[NBUF];

fs/fifo.c

@@ -24,7 +24,7 @@ static int fifo_open(struct inode * inode,struct file * filp)
 	 */
 		filp->f_op = &connecting_fifo_fops;
 		if (!PIPE_READERS(*inode)++)
-			wake_up(&PIPE_WRITE_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		if (!(filp->f_flags & O_NONBLOCK) && !PIPE_WRITERS(*inode)) {
 			PIPE_RD_OPENERS(*inode)++;
 			while (!PIPE_WRITERS(*inode)) {
@@ -32,17 +32,17 @@ static int fifo_open(struct inode * inode,struct file * filp)
 					retval = -ERESTARTSYS;
 					break;
 				}
-				interruptible_sleep_on(&PIPE_READ_WAIT(*inode));
+				interruptible_sleep_on(&PIPE_WAIT(*inode));
 			}
 			if (!--PIPE_RD_OPENERS(*inode))
-				wake_up(&PIPE_WRITE_WAIT(*inode));
+				wake_up(&PIPE_WAIT(*inode));
 		}
 		while (PIPE_WR_OPENERS(*inode))
-			interruptible_sleep_on(&PIPE_READ_WAIT(*inode));
+			interruptible_sleep_on(&PIPE_WAIT(*inode));
 		if (PIPE_WRITERS(*inode))
 			filp->f_op = &read_fifo_fops;
 		if (retval && !--PIPE_READERS(*inode))
-			wake_up(&PIPE_WRITE_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		break;
 	
 	case 2:
@@ -57,7 +57,7 @@ static int fifo_open(struct inode * inode,struct file * filp)
 		}
 		filp->f_op = &write_fifo_fops;
 		if (!PIPE_WRITERS(*inode)++)
-			wake_up(&PIPE_READ_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		if (!PIPE_READERS(*inode)) {
 			PIPE_WR_OPENERS(*inode)++;
 			while (!PIPE_READERS(*inode)) {
@@ -65,15 +65,15 @@ static int fifo_open(struct inode * inode,struct file * filp)
 					retval = -ERESTARTSYS;
 					break;
 				}
-				interruptible_sleep_on(&PIPE_WRITE_WAIT(*inode));
+				interruptible_sleep_on(&PIPE_WAIT(*inode));
 			}
 			if (!--PIPE_WR_OPENERS(*inode))
-				wake_up(&PIPE_READ_WAIT(*inode));
+				wake_up(&PIPE_WAIT(*inode));
 		}
 		while (PIPE_RD_OPENERS(*inode))
-			interruptible_sleep_on(&PIPE_WRITE_WAIT(*inode));
+			interruptible_sleep_on(&PIPE_WAIT(*inode));
 		if (retval && !--PIPE_WRITERS(*inode))
-			wake_up(&PIPE_READ_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		break;
 	
 	case 3:
@@ -85,13 +85,13 @@ static int fifo_open(struct inode * inode,struct file * filp)
 	 */
 		filp->f_op = &rdwr_fifo_fops;
 		if (!PIPE_READERS(*inode)++)
-			wake_up(&PIPE_WRITE_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		while (PIPE_WR_OPENERS(*inode))
-			interruptible_sleep_on(&PIPE_READ_WAIT(*inode));
+			interruptible_sleep_on(&PIPE_WAIT(*inode));
 		if (!PIPE_WRITERS(*inode)++)
-			wake_up(&PIPE_READ_WAIT(*inode));
+			wake_up(&PIPE_WAIT(*inode));
 		while (PIPE_RD_OPENERS(*inode))
-			interruptible_sleep_on(&PIPE_WRITE_WAIT(*inode));
+			interruptible_sleep_on(&PIPE_WAIT(*inode));
 		break;
 
 	default:
@@ -106,7 +106,8 @@ static int fifo_open(struct inode * inode,struct file * filp)
 	}
 	if (!page)
 		return -ENOMEM;
-	PIPE_HEAD(*inode) = PIPE_TAIL(*inode) = 0;
+	PIPE_LOCK(*inode) = 0;
+	PIPE_START(*inode) = PIPE_LEN(*inode) = 0;
 	PIPE_BASE(*inode) = (char *) page;
 	return 0;
 }
@@ -151,9 +152,10 @@ void init_fifo(struct inode * inode)
 {
 	inode->i_op = &fifo_inode_operations;
 	inode->i_pipe = 1;
+	PIPE_LOCK(*inode) = 0;
 	PIPE_BASE(*inode) = NULL;
-	PIPE_HEAD(*inode) = PIPE_TAIL(*inode) = 0;
+	PIPE_START(*inode) = PIPE_LEN(*inode) = 0;
 	PIPE_RD_OPENERS(*inode) = PIPE_WR_OPENERS(*inode) = 0;
-	PIPE_READ_WAIT(*inode) = PIPE_WRITE_WAIT(*inode) = NULL;
+	PIPE_WAIT(*inode) = NULL;
 	PIPE_READERS(*inode) = PIPE_WRITERS(*inode) = 0;
 }

fs/inode.c

@@ -308,10 +308,8 @@ void iput(struct inode * inode)
 					inode->i_ino, inode->i_mode);
 		return;
 	}
-	if (inode->i_pipe) {
-		wake_up(&PIPE_READ_WAIT(*inode));
-		wake_up(&PIPE_WRITE_WAIT(*inode));
-	}
+	if (inode->i_pipe)
+		wake_up(&PIPE_WAIT(*inode));
 repeat:
 	if (inode->i_count>1) {
 		inode->i_count--;
@@ -403,10 +401,11 @@ struct inode * get_pipe_inode(void)
 	}
 	inode->i_op = &pipe_inode_operations;
 	inode->i_count = 2;	/* sum of readers/writers */
-	PIPE_READ_WAIT(*inode) = PIPE_WRITE_WAIT(*inode) = NULL;
-	PIPE_HEAD(*inode) = PIPE_TAIL(*inode) = 0;
+	PIPE_WAIT(*inode) = NULL;
+	PIPE_START(*inode) = PIPE_LEN(*inode) = 0;
 	PIPE_RD_OPENERS(*inode) = PIPE_WR_OPENERS(*inode) = 0;
 	PIPE_READERS(*inode) = PIPE_WRITERS(*inode) = 1;
+	PIPE_LOCK(*inode) = 0;
 	inode->i_pipe = 1;
 	inode->i_mode |= S_IFIFO | S_IRUSR | S_IWUSR;
 	inode->i_uid = current->euid;

fs/pipe.c

@@ -13,33 +13,54 @@
 #include <linux/fcntl.h>
 #include <linux/termios.h>
 
+
+/* We don't use the head/tail construction any more. Now we use the start/len*/
+/* contruction providing full use of PIPE_BUF (multiple of PAGE_SIZE) */
+/* Florian Coosmann (FGC)                                ^ current = 1       */
+/* Additionally, we now use locking technique. This prevents race condition  */
+/* in case of paging and multiple read/write on the same pipe. (FGC)         */
+
+
 static int pipe_read(struct inode * inode, struct file * filp, char * buf, int count)
 {
-	int chars, size, read = 0;
+	int chars = 0, size = 0, read = 0;
+        char *pipebuf;
 
-	if (!(filp->f_flags & O_NONBLOCK))
-		while (!PIPE_SIZE(*inode)) {
-			wake_up(& PIPE_WRITE_WAIT(*inode));
-			if (!PIPE_WRITERS(*inode)) /* are there any writers? */
+	if (filp->f_flags & O_NONBLOCK) {
+		if (PIPE_LOCK(*inode))
+			return -EAGAIN;
+		if (PIPE_EMPTY(*inode))
+			if (PIPE_WRITERS(*inode))
+				return -EAGAIN;
+			else
+				return 0;
+	} else while (PIPE_EMPTY(*inode) || PIPE_LOCK(*inode)) {
+		if (PIPE_EMPTY(*inode)) {
+			if (!PIPE_WRITERS(*inode))
 				return 0;
+		}
 		if (current->signal & ~current->blocked)
 			return -ERESTARTSYS;
-			interruptible_sleep_on(& PIPE_READ_WAIT(*inode));
+		interruptible_sleep_on(&PIPE_WAIT(*inode));
 	}
+	PIPE_LOCK(*inode)++;
 	while (count>0 && (size = PIPE_SIZE(*inode))) {
-		chars = PAGE_SIZE-PIPE_TAIL(*inode);
+		chars = PIPE_MAX_RCHUNK(*inode);
 		if (chars > count)
 			chars = count;
 		if (chars > size)
 			chars = size;
-		memcpy_tofs(buf, PIPE_BASE(*inode)+PIPE_TAIL(*inode), chars );
 		read += chars;
-		PIPE_TAIL(*inode) += chars;
-		PIPE_TAIL(*inode) &= (PAGE_SIZE-1);
+                pipebuf = PIPE_BASE(*inode)+PIPE_START(*inode);
+		PIPE_START(*inode) += chars;
+		PIPE_START(*inode) &= (PIPE_BUF-1);
+		PIPE_LEN(*inode) -= chars;
 		count -= chars;
+		memcpy_tofs(buf, pipebuf, chars );
 		buf += chars;
 	}
-	wake_up(& PIPE_WRITE_WAIT(*inode));
+	PIPE_LOCK(*inode)--;
+	wake_up(&PIPE_WAIT(*inode));
 	if (read)
 		return read;
 	if (PIPE_WRITERS(*inode))
@@ -49,45 +70,47 @@ static int pipe_read(struct inode * inode, struct file * filp, char * buf, int c
 	
 static int pipe_write(struct inode * inode, struct file * filp, char * buf, int count)
 {
-	int chars, size, written = 0;
+	int chars = 0, free = 0, written = 0;
+	char *pipebuf;
 
 	if (!PIPE_READERS(*inode)) { /* no readers */
 		send_sig(SIGPIPE,current,0);
 		return -EPIPE;
 	}
-/* if count < PAGE_SIZE, we have to make it atomic */
-	if (count < PAGE_SIZE)
-		size = PAGE_SIZE-count;
+/* if count <= PIPE_BUF, we have to make it atomic */
+	if (count <= PIPE_BUF)
+		free = count;
 	else
-		size = PAGE_SIZE-1;
+		free = 1; /* can't do it atomically, wait for any free space */
 	while (count>0) {
-		while (PIPE_SIZE(*inode) >= size) {
+		while ((PIPE_FREE(*inode) < free) || PIPE_LOCK(*inode)) {
 			if (!PIPE_READERS(*inode)) { /* no readers */
 				send_sig(SIGPIPE,current,0);
-				return written?written:-EPIPE;
+				return written? :-EPIPE;
 			}
 			if (current->signal & ~current->blocked)
-				return written?written:-ERESTARTSYS;
+				return written? :-ERESTARTSYS;
 			if (filp->f_flags & O_NONBLOCK)
-				return written?written:-EAGAIN;
-			else
-				interruptible_sleep_on(&PIPE_WRITE_WAIT(*inode));
+				return written? :-EAGAIN;
+			interruptible_sleep_on(&PIPE_WAIT(*inode));
 		}
-		while (count>0 && (size = (PAGE_SIZE-1)-PIPE_SIZE(*inode))) {
-			chars = PAGE_SIZE-PIPE_HEAD(*inode);
+		PIPE_LOCK(*inode)++;
+		while (count>0 && (free = PIPE_FREE(*inode))) {
+			chars = PIPE_MAX_WCHUNK(*inode);
 			if (chars > count)
 				chars = count;
-			if (chars > size)
-				chars = size;
-			memcpy_fromfs(PIPE_BASE(*inode)+PIPE_HEAD(*inode), buf, chars );
+			if (chars > free)
+				chars = free;
+                        pipebuf = PIPE_BASE(*inode)+PIPE_END(*inode);
 			written += chars;
-			PIPE_HEAD(*inode) += chars;
-			PIPE_HEAD(*inode) &= (PAGE_SIZE-1);
+			PIPE_LEN(*inode) += chars;
 			count -= chars;
+			memcpy_fromfs(pipebuf, buf, chars );
 			buf += chars;
 		}
-		wake_up(& PIPE_READ_WAIT(*inode));
-		size = PAGE_SIZE-1;
+		PIPE_LOCK(*inode)--;
+		wake_up(&PIPE_WAIT(*inode));
+		free = 1;
 	}
 	return written;
 }
@@ -129,12 +152,12 @@ static int pipe_select(struct inode * inode, struct file * filp, int sel_type, s
 		case SEL_IN:
 			if (!PIPE_EMPTY(*inode) || !PIPE_WRITERS(*inode))
 				return 1;
-			select_wait(&PIPE_READ_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_OUT:
 			if (!PIPE_FULL(*inode) || !PIPE_READERS(*inode))
 				return 1;
-			select_wait(&PIPE_WRITE_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_EX:
 			if (!PIPE_READERS(*inode) || !PIPE_WRITERS(*inode))
@@ -155,12 +178,12 @@ static int fifo_select(struct inode * inode, struct file * filp, int sel_type, s
 		case SEL_IN:
 			if (!PIPE_EMPTY(*inode))
 				return 1;
-			select_wait(&PIPE_READ_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_OUT:
 			if (!PIPE_FULL(*inode) || !PIPE_READERS(*inode))
 				return 1;
-			select_wait(&PIPE_WRITE_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_EX:
 			if (!PIPE_READERS(*inode) || !PIPE_WRITERS(*inode))
@@ -183,10 +206,10 @@ static int connect_read(struct inode * inode, struct file * filp, char * buf, in
 			break;
 		if (filp->f_flags & O_NONBLOCK)
 			return -EAGAIN;
-		wake_up(& PIPE_WRITE_WAIT(*inode));
+		wake_up(& PIPE_WAIT(*inode));
 		if (current->signal & ~current->blocked)
 			return -ERESTARTSYS;
-		interruptible_sleep_on(& PIPE_READ_WAIT(*inode));
+		interruptible_sleep_on(& PIPE_WAIT(*inode));
 	}
 	filp->f_op = &read_fifo_fops;
 	return pipe_read(inode,filp,buf,count);
@@ -200,12 +223,12 @@ static int connect_select(struct inode * inode, struct file * filp, int sel_type
 				filp->f_op = &read_fifo_fops;
 				return 1;
 			}
-			select_wait(&PIPE_READ_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_OUT:
 			if (!PIPE_FULL(*inode))
 				return 1;
-			select_wait(&PIPE_WRITE_WAIT(*inode), wait);
+			select_wait(&PIPE_WAIT(*inode), wait);
 			return 0;
 		case SEL_EX:
 			if (!PIPE_READERS(*inode) || !PIPE_WRITERS(*inode))
@@ -223,21 +246,20 @@ static int connect_select(struct inode * inode, struct file * filp, int sel_type
 static void pipe_read_release(struct inode * inode, struct file * filp)
 {
 	PIPE_READERS(*inode)--;
-	wake_up(&PIPE_WRITE_WAIT(*inode));
+	wake_up(&PIPE_WAIT(*inode));
 }
 
 static void pipe_write_release(struct inode * inode, struct file * filp)
 {
 	PIPE_WRITERS(*inode)--;
-	wake_up(&PIPE_READ_WAIT(*inode));
+	wake_up(&PIPE_WAIT(*inode));
 }
 
 static void pipe_rdwr_release(struct inode * inode, struct file * filp)
 {
 	PIPE_READERS(*inode)--;
 	PIPE_WRITERS(*inode)--;
-	wake_up(&PIPE_READ_WAIT(*inode));
-	wake_up(&PIPE_WRITE_WAIT(*inode));
+	wake_up(&PIPE_WAIT(*inode));
 }
 
 /*

include/linux/delay.h

@@ -11,7 +11,7 @@ extern unsigned long loops_per_sec;
 
 extern __inline__ void __delay(int loops)
 {
-	__asm__("\n1:\tdecl %0\n\tjns 1b\n": :"a" (loops):"ax");
+	__asm__(".align 2,0x90\n1:\tdecl %0\n\tjns 1b": :"a" (loops):"ax");
 }
 
 /*

include/linux/fs.h

@@ -12,6 +12,7 @@
 #include <linux/types.h>
 #include <linux/dirent.h>
 #include <linux/vfs.h>
+#include <linux/net.h>
 
 /*
  * It's silly to have NR_OPEN bigger than NR_FILE, but I'll fix
@@ -177,6 +178,7 @@ struct inode {
 	struct inode * i_hash_next, * i_hash_prev;
 	struct inode * i_bound_to, * i_bound_by;
 	struct inode * i_mount;
+	struct socket * i_socket;
 	unsigned short i_count;
 	unsigned short i_flags;
 	unsigned char i_lock;

include/linux/in.h

@@ -124,41 +124,41 @@ extern unsigned short int	htons(unsigned short int);
 static __inline__ unsigned long int
 __ntohl(unsigned long int x)
 {
-  register unsigned long int tmp __asm__ ("ax") = x;
-  __asm__ __volatile__ ("xchgb %%al,%%ah\n\t"   /* swap lower bytes	*/
-		"rorl $16,%%eax\n\t"		/* swap words		*/
-		"xchgb %%al,%%ah\n\t"		/* swap higher bytes	*/
-		: "=a" (tmp) : "a" (tmp) );
-  return(tmp);
+	__asm__("xchgb %l0,%h0\n\t"	/* swap lower bytes	*/
+		"rorl $16,%0\n\t"	/* swap words		*/
+		"xchgb %l0,%h0"		/* swap higher bytes	*/
+		:"=q" (x)
+		: "0" (x));
+	return x;
 }
 
 static __inline__ unsigned short int
 __ntohs(unsigned short int x)
 {
-  register unsigned short int tmp __asm__ ("ax") = x;
-  __asm__ __volatile__ ("xchgb %%al,%%ah\n\t"	/* swap bytes		*/
-		: "=a" (tmp) : "a" (tmp));
-  return(tmp);
+	__asm__("xchgb %b0,%h0"		/* swap bytes		*/
+		: "=q" (x)
+		:  "0" (x));
+	return x;
 }
 
 static __inline__ unsigned long int
 __htonl(unsigned long int x)
 {
-  register unsigned long int tmp __asm__ ("ax") = x;
-  __asm__ __volatile__ ("xchgb %%al,%%ah\n\t"	/* swap lower bytes	*/
-		"rorl $16,%%eax\n\t"		/* swap words		*/
-		"xchgb %%al,%%ah\n\t"		/* swap higher bytes	*/
-		: "=a" (tmp) : "a" (tmp));
-  return(tmp);
+	__asm__("xchgb %l0,%h0\n\t"	/* swap lower bytes	*/
+		"rorl $16,%0\n\t"	/* swap words		*/
+		"xchgb %l0,%h0"		/* swap higher bytes	*/
+		:"=q" (x)
+		: "0" (x));
+	return x;
 }
 
 static __inline__ unsigned short int
 __htons(unsigned short int x)
 {
-  register unsigned short int tmp __asm__ ("ax") = x;
-  __asm__ __volatile__ ("xchgb %%al,%%ah\n\t"   /* swap bytes */
-		: "=a" (tmp) : "a" (tmp));
-  return(tmp);
+	__asm__("xchgb %b0,%h0"		/* swap bytes		*/
+		: "=q" (x)
+		:  "0" (x));
+	return x;
 }
 
 #ifdef  __OPTIMIZE__

include/linux/limits.h

@@ -12,6 +12,6 @@
 #define MAX_INPUT        255	/* size of the type-ahead buffer */
 #define NAME_MAX         255	/* # chars in a file name */
 #define PATH_MAX        1024	/* # chars in a path name */
-#define PIPE_BUF        4095	/* # bytes in atomic write to a pipe */
+#define PIPE_BUF        4096	/* # bytes in atomic write to a pipe */
 
 #endif

include/linux/net.h

@@ -20,6 +20,7 @@
 
 
 #include <linux/wait.h>
+#include <linux/socket.h>
 
 
 #define NSOCKETS	128		/* should be dynamic, later...	*/
@@ -75,13 +76,10 @@ struct socket {
   struct socket		*iconn;		/* incomplete client conn.s	*/
   struct socket		*next;
   struct wait_queue	**wait;		/* ptr to place to wait on	*/
-  void			*dummy;
+  struct inode		*inode;
 };
 
-#define SOCK_INODE(S)	((struct inode *)(S)->dummy)
-extern struct socket	sockets[NSOCKETS];
-#define last_socket	(sockets + NSOCKETS - 1)
-
+#define SOCK_INODE(S)	((S)->inode)
 
 struct proto_ops {
   int	family;

include/linux/pipe_fs_i.h

@@ -2,28 +2,34 @@
 #define _LINUX_PIPE_FS_I_H
 
 struct pipe_inode_info {
-	struct wait_queue * read_wait;
-	struct wait_queue * write_wait;
+	struct wait_queue * wait;
 	char * base;
-	unsigned int head;
-	unsigned int tail;
+	unsigned int start;
+	unsigned int len;
+	unsigned int lock;
 	unsigned int rd_openers;
 	unsigned int wr_openers;
 	unsigned int readers;
 	unsigned int writers;
 };
 
-#define PIPE_READ_WAIT(inode)	((inode).u.pipe_i.read_wait)
-#define PIPE_WRITE_WAIT(inode)	((inode).u.pipe_i.write_wait)
+#define PIPE_WAIT(inode)	((inode).u.pipe_i.wait)
 #define PIPE_BASE(inode)	((inode).u.pipe_i.base)
-#define PIPE_HEAD(inode)	((inode).u.pipe_i.head)
-#define PIPE_TAIL(inode)	((inode).u.pipe_i.tail)
+#define PIPE_START(inode)	((inode).u.pipe_i.start)
+#define PIPE_LEN(inode)		((inode).u.pipe_i.len)
 #define PIPE_RD_OPENERS(inode)	((inode).u.pipe_i.rd_openers)
 #define PIPE_WR_OPENERS(inode)	((inode).u.pipe_i.wr_openers)
 #define PIPE_READERS(inode)	((inode).u.pipe_i.readers)
 #define PIPE_WRITERS(inode)	((inode).u.pipe_i.writers)
-#define PIPE_SIZE(inode)	((PIPE_HEAD(inode)-PIPE_TAIL(inode))&(PAGE_SIZE-1))
-#define PIPE_EMPTY(inode)	(PIPE_HEAD(inode)==PIPE_TAIL(inode))
-#define PIPE_FULL(inode)	(PIPE_SIZE(inode)==(PAGE_SIZE-1))
+#define PIPE_LOCK(inode)	((inode).u.pipe_i.lock)
+#define PIPE_SIZE(inode)	PIPE_LEN(inode)
+
+#define PIPE_EMPTY(inode)	(PIPE_SIZE(inode)==0)
+#define PIPE_FULL(inode)	(PIPE_SIZE(inode)==PIPE_BUF)
+#define PIPE_FREE(inode)	(PIPE_BUF - PIPE_LEN(inode))
+#define PIPE_END(inode)		((PIPE_START(inode)+PIPE_LEN(inode))&\
+							   (PIPE_BUF-1))
+#define PIPE_MAX_RCHUNK(inode)	(PIPE_BUF - PIPE_START(inode))
+#define PIPE_MAX_WCHUNK(inode)	(PIPE_BUF - PIPE_END(inode))
 
 #endif

kernel/ptrace.c

@@ -269,7 +269,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 	if (!(child->flags & PF_PTRACED))
 		return -ESRCH;
 	if (child->state != TASK_STOPPED) {
-		if (request != PTRACE_KILL && request != PTRACE_DETACH)
+		if (request != PTRACE_KILL)
 			return -ESRCH;
 	}
 	if (child->p_pptr != current)

net/inet/ip.c

@@ -425,19 +425,22 @@ static inline unsigned short
 ip_fast_csum(unsigned char * buff, int wlen)
 {
     unsigned long sum = 0;
-    __asm__("\t clc\n"
-	    "1:\n"
-	    "\t lodsl\n"
-	    "\t adcl %%eax, %%ebx\n"
-	    "\t loop 1b\n"
-	    "\t adcl $0, %%ebx\n"
-	    "\t movl %%ebx, %%eax\n"
-	    "\t shrl $16, %%eax\n"
-	    "\t addw %%ax, %%bx\n"
-	    "\t adcw $0, %%bx\n"
-	    : "=b" (sum) , "=S" (buff)
-	    : "0" (sum), "c" (wlen) ,"1" (buff)
-	    : "ax", "cx", "si", "bx" );
+
+    if (wlen)
+	 __asm__("clc\n"
+		"1:\t"
+		"lodsl\n\t"
+		"adcl %%eax, %0\n\t"
+		"decl %2\n\t"
+		"jne 1b\n\t"
+		"adcl $0, %0\n\t"
+		"movl %0, %%eax\n\t"
+		"shrl $16, %%eax\n\t"
+		"addw %%ax, %w0\n\t"
+		"adcw $0, %w0"
+	    : "=r" (sum), "=S" (buff), "=r" (wlen)
+	    : "0"  (sum),  "1" (buff),  "2" (wlen)
+	    : "ax" );
     return (~sum) & 0xffff;
 }
 
@@ -452,33 +455,33 @@ ip_compute_csum(unsigned char * buff, int len)
 
   /* Do the first multiple of 4 bytes and convert to 16 bits. */
   if (len > 3) {
-	__asm__("\t clc\n"
-	        "1:\n"
-	        "\t lodsl\n"
-	        "\t adcl %%eax, %%ebx\n"
-	        "\t loop 1b\n"
-	        "\t adcl $0, %%ebx\n"
-	        "\t movl %%ebx, %%eax\n"
-	        "\t shrl $16, %%eax\n"
-	        "\t addw %%ax, %%bx\n"
-	        "\t adcw $0, %%bx\n"
+	__asm__("clc\n"
+	        "1:\t"
+	    	"lodsl\n\t"
+	    	"adcl %%eax, %%ebx\n\t"
+	    	"loop 1b\n\t"
+	    	"adcl $0, %%ebx\n\t"
+	    	"movl %%ebx, %%eax\n\t"
+	    	"shrl $16, %%eax\n\t"
+	    	"addw %%ax, %%bx\n\t"
+	    	"adcw $0, %%bx"
 	        : "=b" (sum) , "=S" (buff)
 	        : "0" (sum), "c" (len >> 2) ,"1" (buff)
 	        : "ax", "cx", "si", "bx" );
   }
   if (len & 2) {
-	__asm__("\t lodsw\n"
-	        "\t addw %%ax, %%bx\n"
-	        "\t adcw $0, %%bx\n"
+	__asm__("lodsw\n\t"
+	    	"addw %%ax, %%bx\n\t"
+	    	"adcw $0, %%bx"
 	        : "=b" (sum), "=S" (buff)
 	        : "0" (sum), "1" (buff)
 	        : "bx", "ax", "si");
   }
   if (len & 1) {
-	__asm__("\t lodsb\n"
-	        "\t movb $0, %%ah\n"
-	        "\t addw %%ax, %%bx\n"
-	        "\t adcw $0, %%bx\n"
+	__asm__("lodsb\n\t"
+	    	"movb $0, %%ah\n\t"
+	    	"addw %%ax, %%bx\n\t"
+	    	"adcw $0, %%bx"
 	        : "=b" (sum), "=S" (buff)
 	        : "0" (sum), "1" (buff)
 	        : "bx", "ax", "si");

net/socket.c

@@ -69,11 +69,13 @@ static struct file_operations socket_file_ops = {
   NULL,			/* no special open code... */
   sock_close
 };
-struct socket sockets[NSOCKETS];
+
+static struct socket sockets[NSOCKETS];
 static struct wait_queue *socket_wait_free = NULL;
 static struct proto_ops *pops[NPROTO];
 static int net_debug = 0;
 
+#define last_socket	(sockets + NSOCKETS - 1)
 
 #ifdef SOCK_DEBUG
 /* Module debugging. */
@@ -138,8 +140,16 @@ socki_lookup(struct inode *inode)
 {
   struct socket *sock;
 
+  if ((sock = inode->i_socket) != NULL) {
+	if (sock->state != SS_FREE && SOCK_INODE(sock) == inode)
+		return sock;
+	printk("socket.c: uhhuh. stale inode->i_socket pointer\n");
+  }
   for (sock = sockets; sock <= last_socket; ++sock)
-	if (sock->state != SS_FREE && SOCK_INODE(sock) == inode) return(sock);
+	if (sock->state != SS_FREE && SOCK_INODE(sock) == inode) {
+		printk("socket.c: uhhuh. Found socket despite no inode->i_socket pointer\n");
+		return(sock);
+	}
   return(NULL);
 }
 
@@ -187,6 +197,7 @@ sock_alloc(int wait)
 			SOCK_INODE(sock)->i_mode = S_IFSOCK;
 			SOCK_INODE(sock)->i_uid = current->euid;
 			SOCK_INODE(sock)->i_gid = current->egid;
+			SOCK_INODE(sock)->i_socket = sock;
 
 			sock->wait = &SOCK_INODE(sock)->i_wait;
 			DPRINTF((net_debug,