Merge kroah.com:/home/greg/linux/BK/bleeding_edge-2.5

into kroah.com:/home/greg/linux/BK/gregkh-2.5

Makefile

@@ -318,7 +318,7 @@ prepare: include/linux/version.h include/asm include/config/MARKER
 #	This can be used by arch/$ARCH/Makefile to preprocess
 #	their vmlinux.lds.S file
 
-arch/$ARCH/vmlinux.lds.s: arch/$ARCH/vmlinux.lds.S
+arch/$(ARCH)/vmlinux.lds.s: arch/$(ARCH)/vmlinux.lds.S
 	$(CPP) $(CPPFLAGS) $(CPPFLAGS_$@) -P -C -U$(ARCH) $< -o $@
 
 # Single targets

arch/i386/Makefile

@@ -18,7 +18,7 @@
 
 LDFLAGS		:= -m elf_i386
 OBJCOPYFLAGS	:= -O binary -R .note -R .comment -S
-LDFLAGS_vmlinux := -T arch/i386/vmlinux.lds -e stext
+LDFLAGS_vmlinux := -T arch/i386/vmlinux.lds.s -e stext
 
 CFLAGS += -pipe
 
@@ -104,7 +104,7 @@ endif
 
 MAKEBOOT = +$(MAKE) -C arch/$(ARCH)/boot
 
-vmlinux: arch/i386/vmlinux.lds
+vmlinux: arch/i386/vmlinux.lds.s
 
 .PHONY: zImage bzImage compressed zlilo bzlilo zdisk bzdisk install \
 		clean archclean archmrproper

drivers/i2c/i2c-proc.c

@@ -60,7 +60,6 @@ int __init sensors_init(void);
 static struct ctl_table_header *i2c_entries[SENSORS_ENTRY_MAX];
 
 static struct i2c_client *i2c_clients[SENSORS_ENTRY_MAX];
-static unsigned short i2c_inodes[SENSORS_ENTRY_MAX];
 
 static ctl_table sysctl_table[] = {
 	{CTL_DEV, "dev", NULL, 0, 0555},
@@ -189,8 +188,6 @@ int i2c_register_entry(struct i2c_client *client, const char *prefix,
 		return id;
 	}
 #endif				/* DEBUG */
-	i2c_inodes[id - 256] =
-	    new_header->ctl_table->child->child->de->low_ino;
 	new_header->ctl_table->child->child->de->owner = controlling_mod;
 
 	return id;
@@ -213,49 +210,6 @@ void i2c_deregister_entry(int id)
 	}
 }
 
-/* Monitor access for /proc/sys/dev/sensors; make unloading i2c-proc.o 
-   impossible if some process still uses it or some file in it */
-void i2c_fill_inode(struct inode *inode, int fill)
-{
-	if (fill)
-		MOD_INC_USE_COUNT;
-	else
-		MOD_DEC_USE_COUNT;
-}
-
-/* Monitor access for /proc/sys/dev/sensors/ directories; make unloading
-   the corresponding module impossible if some process still uses it or
-   some file in it */
-void i2c_dir_fill_inode(struct inode *inode, int fill)
-{
-	int i;
-	struct i2c_client *client;
-
-#ifdef DEBUG
-	if (!inode) {
-		printk(KERN_ERR "i2c-proc.o: Warning: inode NULL in fill_inode()\n");
-		return;
-	}
-#endif				/* def DEBUG */
-
-	for (i = 0; i < SENSORS_ENTRY_MAX; i++)
-		if (i2c_clients[i]
-		    && (i2c_inodes[i] == inode->i_ino)) break;
-#ifdef DEBUG
-	if (i == SENSORS_ENTRY_MAX) {
-		printk
-		    (KERN_ERR "i2c-proc.o: Warning: inode (%ld) not found in fill_inode()\n",
-		     inode->i_ino);
-		return;
-	}
-#endif				/* def DEBUG */
-	client = i2c_clients[i];
-	if (fill)
-		client->driver->inc_use(client);
-	else
-		client->driver->dec_use(client);
-}
-
 int i2c_proc_chips(ctl_table * ctl, int write, struct file *filp,
 		       void *buffer, size_t * lenp)
 {

drivers/ide/ide-floppy.c

@@ -1817,7 +1817,7 @@ static int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file
 		return (idefloppy_get_format_progress(drive, inode, file,
 						      (int *)arg));
 	}
- 	return -EIO;
+ 	return -EINVAL;
 }
 
 /*

drivers/ide/ide.c

@@ -275,7 +275,6 @@ static void init_hwif_data (unsigned int index)
 		drive->name[1]			= 'd';
 		drive->name[2]			= 'a' + (index * MAX_DRIVES) + unit;
 		drive->max_failures		= IDE_DEFAULT_MAX_FAILURES;
-		init_waitqueue_head(&drive->wqueue);
 		INIT_LIST_HEAD(&drive->list);
 	}
 }
@@ -1805,8 +1804,6 @@ static int ide_open (struct inode * inode, struct file * filp)
 #endif /* defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) */
 	}
 #endif /* CONFIG_KMOD */
-	while (drive->busy)
-		sleep_on(&drive->wqueue);
 	drive->usage++;
 	if (drive->driver != NULL)
 		return DRIVER(drive)->open(inode, filp, drive);
@@ -1877,7 +1874,7 @@ struct seq_operations ide_drivers_op = {
  */
 int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
 {
-	if (!drive->present || drive->busy || drive->usage)
+	if (!drive->present || drive->usage)
 		goto abort;
 	if (drive->driver != NULL && DRIVER(drive)->cleanup(drive))
 		goto abort;
@@ -1961,7 +1958,7 @@ void ide_unregister (unsigned int index)
 		drive = &hwif->drives[unit];
 		if (!drive->present)
 			continue;
-		if (drive->busy || drive->usage)
+		if (drive->usage)
 			goto abort;
 		if (drive->driver != NULL && DRIVER(drive)->cleanup(drive))
 			goto abort;
@@ -2653,18 +2650,6 @@ static int ide_ioctl (struct inode *inode, struct file *file,
 			}
 			return 0;
 		}
-		case BLKGETSIZE:
-		case BLKGETSIZE64:
-		case BLKROSET:
-		case BLKROGET:
-		case BLKFLSBUF:
-		case BLKSSZGET:
-		case BLKPG:
-		case BLKELVGET:
-		case BLKELVSET:
-		case BLKBSZGET:
-		case BLKBSZSET:
-			return blk_ioctl(inode->i_bdev, cmd, arg);
 
 		case CDROMEJECT:
 		case CDROMCLOSETRAY:
@@ -3362,7 +3347,7 @@ static ide_startstop_t default_error (ide_drive_t *drive, const char *msg, byte
 static int default_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
 			  unsigned int cmd, unsigned long arg)
 {
-	return -EIO;
+	return -EINVAL;
 }
 
 static int default_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
@@ -3434,7 +3419,7 @@ int ide_register_subdriver (ide_drive_t *drive, ide_driver_t *driver, int versio
 	
 	spin_lock_irqsave(&ide_lock, flags);
 	if (version != IDE_SUBDRIVER_VERSION || !drive->present ||
-	    drive->driver != NULL || drive->busy || drive->usage) {
+	    drive->driver != NULL || drive->usage) {
 		spin_unlock_irqrestore(&ide_lock, flags);
 		return 1;
 	}
@@ -3463,8 +3448,7 @@ int ide_unregister_subdriver (ide_drive_t *drive)
 	unsigned long flags;
 	
 	spin_lock_irqsave(&ide_lock, flags);
-	if (drive->usage || drive->busy ||
-	    drive->driver == NULL || DRIVER(drive)->busy) {
+	if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) {
 		spin_unlock_irqrestore(&ide_lock, flags);
 		return 1;
 	}

fs/aio.c

@@ -992,7 +992,7 @@ asmlinkage long sys_io_submit(aio_context_t ctx_id, long nr,
 			break;
 		}
 
-		if (unlikely(__copy_from_user(&tmp, user_iocb, sizeof(tmp)))) {
+		if (unlikely(copy_from_user(&tmp, user_iocb, sizeof(tmp)))) {
 			ret = -EFAULT;
 			break;
 		}

fs/jfs/file.c

@@ -24,9 +24,6 @@
 #include "jfs_debug.h"
 
 
-extern int generic_file_open(struct inode *, struct file *);
-extern loff_t generic_file_llseek(struct file *, loff_t, int origin);
-
 extern int jfs_commit_inode(struct inode *, int);
 
 int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
@@ -114,11 +111,3 @@ struct file_operations jfs_file_operations = {
  	.sendfile	= generic_file_sendfile,
 	.fsync		= jfs_fsync,
 };
-
-struct inode_operations jfs_special_inode_operations = {
-	.setxattr	= jfs_setxattr,
-	.getxattr	= jfs_getxattr,
-	.listxattr	= jfs_listxattr,
-	.removexattr	= jfs_removexattr,
-};
-

fs/jfs/inode.c

@@ -31,7 +31,6 @@
 extern struct inode_operations jfs_dir_inode_operations;
 extern struct inode_operations jfs_file_inode_operations;
 extern struct inode_operations jfs_symlink_inode_operations;
-extern struct inode_operations jfs_special_inode_operations;
 extern struct file_operations jfs_dir_operations;
 extern struct file_operations jfs_file_operations;
 struct address_space_operations jfs_aops;
@@ -66,7 +65,7 @@ struct inode *jfs_iget(struct super_block *sb, ino_t ino)
 		} else
 			inode->i_op = &jfs_symlink_inode_operations;
 	} else {
-		inode->i_op = &jfs_special_inode_operations;
+		inode->i_op = &jfs_file_inode_operations;
 		init_special_inode(inode, inode->i_mode,
 				   kdev_t_to_nr(inode->i_rdev));
 	}

fs/jfs/jfs_dtree.c

@@ -101,7 +101,6 @@
  */
 
 #include <linux/fs.h>
-#include <linux/smp_lock.h>
 #include "jfs_incore.h"
 #include "jfs_superblock.h"
 #include "jfs_filsys.h"

fs/jfs/jfs_extendfs.h

-/*
- *   Copyright (c) International Business Machines Corp., 2000-2001
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or 
- *   (at your option) any later version.
- * 
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software 
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#ifndef	_H_JFS_EXTENDFS
-#define _H_JFS_EXTENDFS
-
-/*
- *	extendfs parameter list
- */
-typedef struct {
-	u32 flag;		/* 4: */
-	u8 dev;			/* 1: */
-	u8 pad[3];		/* 3: */
-	s64 LVSize;		/* 8: LV size in LV block */
-	s64 FSSize;		/* 8: FS size in LV block */
-	s32 LogSize;		/* 4: inlinelog size in LV block */
-} extendfs_t;			/* (28) */
-
-/* plist flag */
-#define EXTENDFS_QUERY		0x00000001
-
-#endif				/* _H_JFS_EXTENDFS */

fs/jfs/jfs_extent.c

@@ -26,8 +26,9 @@
  * forward references
  */
 static int extBalloc(struct inode *, s64, s64 *, s64 *);
+#ifdef _NOTYET
 static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
-int extRecord(struct inode *, xad_t *);
+#endif
 static s64 extRoundDown(s64 nb);
 
 /*
@@ -191,6 +192,7 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, boolean_t abnr)
 }
 
 
+#ifdef _NOTYET
 /*
  * NAME:        extRealloc()
  *
@@ -335,6 +337,7 @@ int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, boolean_t abnr)
 	up(&JFS_IP(ip)->commit_sem);
 	return (rc);
 }
+#endif			/* _NOTYET */
 
 
 /*
@@ -440,6 +443,7 @@ int extRecord(struct inode *ip, xad_t * xp)
 }
 
 
+#ifdef _NOTYET
 /*
  * NAME:        extFill()
  *
@@ -473,6 +477,7 @@ int extFill(struct inode *ip, xad_t * xp)
 
 	return (0);
 }
+#endif			/* _NOTYET */
 
 
 /*
@@ -548,6 +553,7 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 }
 
 
+#ifdef _NOTYET
 /*
  * NAME:	extBrealloc()
  *
@@ -601,6 +607,7 @@ extBrealloc(struct inode *ip,
 	 */
 	return (extBalloc(ip, blkno, newnblks, newblkno));
 }
+#endif			/* _NOTYET */
 
 
 /*

fs/jfs/jfs_imap.c

@@ -42,6 +42,8 @@
  */
 
 #include <linux/fs.h>
+#include <linux/buffer_head.h>
+
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
 #include "jfs_dinode.h"
@@ -1175,7 +1177,7 @@ int diFree(struct inode *ip)
 	 * invalidate any page of the inode extent freed from buffer cache;
 	 */
 	freepxd = iagp->inoext[extno];
-	invalidate_pxd_metapages(JFS_SBI(ip->i_sb)->direct_inode, freepxd);
+	invalidate_pxd_metapages(ip->i_sb->s_bdev->bd_inode, freepxd);
 
 	/*
 	 *      update iag list(s) (careful update step 2)
@@ -2963,26 +2965,30 @@ printf("diExtendFS: iag:%d agstart:%Ld agno:%d\n", i, agstart, n);
  *
  * note: shadow page with regular inode (rel.2);
  */
-static void
-duplicateIXtree(struct super_block *sb, s64 blkno, int xlen, s64 * xaddr)
+static void duplicateIXtree(struct super_block *sb, s64 blkno,
+			    int xlen, s64 *xaddr)
 {
-	int rc;
-	tid_t tid;
-	struct inode *ip;
-	metapage_t *mpsuper;
 	struct jfs_superblock *j_sb;
+	struct buffer_head *bh;
+	struct inode *ip;
+	tid_t tid;
+	int rc;
 
 	/* if AIT2 ipmap2 is bad, do not try to update it */
 	if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT)	/* s_flag */
 		return;
 	ip = diReadSpecial(sb, FILESYSTEM_I, 1);
-	if (ip == 0) {
+	if (ip == NULL) {
 		JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
-		if ((rc = readSuper(sb, &mpsuper)))
+		if ((rc = readSuper(sb, &bh)))
 			return;
-		j_sb = (struct jfs_superblock *) (mpsuper->data);
+		j_sb = (struct jfs_superblock *)bh->b_data;
 		j_sb->s_flag |= JFS_BAD_SAIT;
-		write_metapage(mpsuper);
+
+		mark_buffer_dirty(bh);
+		ll_rw_block(WRITE, 1, &bh);
+		wait_on_buffer(bh);
+		brelse(bh);
 		return;
 	}
 

fs/jfs/jfs_incore.h

@@ -152,8 +152,6 @@ struct jfs_sb_info {
         /* Formerly in ipbmap */
 	struct bmap	*bmap;		/* 4: incore bmap descriptor	*/
 	struct nls_table *nls_tab;	/* 4: current codepage		*/
-	struct inode	*direct_inode;	/* 4: inode for physical I/O	*/
-	struct address_space *direct_mapping; /* 4: mapping for physical I/O */
 	uint		state;		/* 4: mount/recovery state	*/
 };
 

fs/jfs/jfs_logmgr.c

@@ -960,17 +960,19 @@ int lmLogSync(log_t * log, int nosyncwait)
 	 * reset syncpt = sync
 	 */
 	if (log->sync != log->syncpt) {
-		struct jfs_sb_info	*sbi = JFS_SBI(log->sb);
+		struct super_block *sb = log->sb;
+		struct jfs_sb_info *sbi = JFS_SBI(sb);
+
 		/*
 		 * We need to make sure all of the "written" metapages
 		 * actually make it to disk
 		 */
 		filemap_fdatawrite(sbi->ipbmap->i_mapping);
 		filemap_fdatawrite(sbi->ipimap->i_mapping);
-		filemap_fdatawrite(sbi->direct_inode->i_mapping);
+		filemap_fdatawrite(sb->s_bdev->bd_inode->i_mapping);
 		filemap_fdatawait(sbi->ipbmap->i_mapping);
 		filemap_fdatawait(sbi->ipimap->i_mapping);
-		filemap_fdatawait(sbi->direct_inode->i_mapping);
+		filemap_fdatawait(sb->s_bdev->bd_inode->i_mapping);
 
 		lrd.logtid = 0;
 		lrd.backchain = 0;
@@ -1985,6 +1987,7 @@ static void lbmIODone(struct bio *bio)
 
 		jERROR(1, ("lbmIODone: I/O error in JFS log\n"));
 	}
+
 	bio_put(bio);
 
 	/*
@@ -2102,7 +2105,6 @@ static void lbmIODone(struct bio *bio)
 
 		LCACHE_UNLOCK(flags);	/* unlock+enable */
 	}
-	return;
 }
 
 int jfsIOWait(void *arg)

fs/jfs/jfs_metapage.c

@@ -27,16 +27,13 @@
 #include "jfs_txnmgr.h"
 #include "jfs_debug.h"
 
-extern struct task_struct *jfsCommitTask;
 static spinlock_t meta_lock = SPIN_LOCK_UNLOCKED;
-static wait_queue_head_t meta_wait;
 
 #ifdef CONFIG_JFS_STATISTICS
 struct {
 	uint	pagealloc;	/* # of page allocations */
 	uint	pagefree;	/* # of page frees */
 	uint	lockwait;	/* # of sleeping lock_metapage() calls */
-	uint	allocwait;	/* # of sleeping alloc_metapage() calls */
 } mpStat;
 #endif
 
@@ -134,11 +131,6 @@ static void mp_mempool_free(void *element, void *pool_data)
 
 int __init metapage_init(void)
 {
-	/*
-	 * Initialize wait queue
-	 */
-	init_waitqueue_head(&meta_wait);
-
 	/*
 	 * Allocate the metapage structures
 	 */
@@ -225,51 +217,6 @@ static void remove_from_hash(metapage_t * mp, metapage_t ** hash_ptr)
 		mp->hash_next->hash_prev = mp->hash_prev;
 }
 
-/*
- * Direct address space operations
- */
-
-static int direct_get_block(struct inode *ip, sector_t lblock,
-			    struct buffer_head *bh_result, int create)
-{
-	if (create)
-		set_buffer_new(bh_result);
-
-	map_bh(bh_result, ip->i_sb, lblock);
-
-	return 0;
-}
-
-static int direct_writepage(struct page *page)
-{
-	return block_write_full_page(page, direct_get_block);
-}
-
-static int direct_readpage(struct file *fp, struct page *page)
-{
-	return block_read_full_page(page, direct_get_block);
-}
-
-static int direct_prepare_write(struct file *file, struct page *page,
-				unsigned from, unsigned to)
-{
-	return block_prepare_write(page, from, to, direct_get_block);
-}
-
-static int direct_bmap(struct address_space *mapping, long block)
-{
-	return generic_block_bmap(mapping, block, direct_get_block);
-}
-
-struct address_space_operations direct_aops = {
-	.readpage	= direct_readpage,
-	.writepage	= direct_writepage,
-	.sync_page	= block_sync_page,
-	.prepare_write	= direct_prepare_write,
-	.commit_write	= generic_commit_write,
-	.bmap		= direct_bmap,
-};
-
 metapage_t *__get_metapage(struct inode *inode,
 			   unsigned long lblock, unsigned int size,
 			   int absolute, unsigned long new)
@@ -286,14 +233,12 @@ metapage_t *__get_metapage(struct inode *inode,
 		 inode, lblock));
 
 	if (absolute)
-		mapping = JFS_SBI(inode->i_sb)->direct_mapping;
+		mapping = inode->i_sb->s_bdev->bd_inode->i_mapping;
 	else
 		mapping = inode->i_mapping;
 
 	spin_lock(&meta_lock);
-
 	hash_ptr = meta_hash(mapping, lblock);
-
 	mp = search_hash(hash_ptr, mapping, lblock);
 	if (mp) {
 	      page_found:
@@ -309,7 +254,7 @@ metapage_t *__get_metapage(struct inode *inode,
 		lock_metapage(mp);
 		spin_unlock(&meta_lock);
 	} else {
-		l2bsize = inode->i_sb->s_blocksize_bits;
+		l2bsize = inode->i_blkbits;
 		l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
 		page_index = lblock >> l2BlocksPerPage;
 		page_offset = (lblock - (page_index << l2BlocksPerPage)) <<
@@ -431,12 +376,11 @@ void hold_metapage(metapage_t * mp, int force)
 
 static void __write_metapage(metapage_t * mp)
 {
-	struct inode *ip = (struct inode *) mp->mapping->host;
+	int l2bsize = mp->mapping->host->i_blkbits;
+	int l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
 	unsigned long page_index;
 	unsigned long page_offset;
 	int rc;
-	int l2bsize = ip->i_sb->s_blocksize_bits;
-	int l2BlocksPerPage = PAGE_CACHE_SHIFT - l2bsize;
 
 	jFYI(1, ("__write_metapage: mp = 0x%p\n", mp));
 
@@ -561,7 +505,7 @@ void __invalidate_metapages(struct inode *ip, s64 addr, int len)
 {
 	metapage_t **hash_ptr;
 	unsigned long lblock;
-	int l2BlocksPerPage = PAGE_CACHE_SHIFT - ip->i_sb->s_blocksize_bits;
+	int l2BlocksPerPage = PAGE_CACHE_SHIFT - ip->i_blkbits;
 	struct address_space *mapping = ip->i_mapping;
 	metapage_t *mp;
 	struct page *page;
@@ -624,12 +568,10 @@ int jfs_mpstat_read(char *buffer, char **start, off_t offset, int length,
 		       "=======================\n"
 		       "page allocations = %d\n"
 		       "page frees = %d\n"
-		       "lock waits = %d\n"
-		       "allocation waits = %d\n",
+		       "lock waits = %d\n",
 		       mpStat.pagealloc,
 		       mpStat.pagefree,
-		       mpStat.lockwait,
-		       mpStat.allocwait);
+		       mpStat.lockwait);
 
 	begin = offset;
 	*start = buffer + begin;

fs/jfs/jfs_metapage.h

@@ -57,11 +57,6 @@ typedef struct metapage {
 	struct jfs_log *log;
 } metapage_t;
 
-/*
- * Direct-access address space operations
- */
-extern struct address_space_operations direct_aops;
-
 /* metapage flag */
 #define META_locked	0
 #define META_absolute	1

fs/jfs/jfs_mount.c

@@ -48,6 +48,8 @@
  */
 
 #include <linux/fs.h>
+#include <linux/buffer_head.h>
+
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
 #include "jfs_superblock.h"
@@ -314,18 +316,18 @@ int jfs_mount_rw(struct super_block *sb, int remount)
 static int chkSuper(struct super_block *sb)
 {
 	int rc = 0;
-	metapage_t *mp;
 	struct jfs_sb_info *sbi = JFS_SBI(sb);
 	struct jfs_superblock *j_sb;
+	struct buffer_head *bh;
 	int AIM_bytesize, AIT_bytesize;
 	int expected_AIM_bytesize, expected_AIT_bytesize;
 	s64 AIM_byte_addr, AIT_byte_addr, fsckwsp_addr;
 	s64 byte_addr_diff0, byte_addr_diff1;
 	s32 bsize;
 
-	if ((rc = readSuper(sb, &mp)))
+	if ((rc = readSuper(sb, &bh)))
 		return rc;
-	j_sb = (struct jfs_superblock *) (mp->data);
+	j_sb = (struct jfs_superblock *)bh->b_data;
 
 	/*
 	 * validate superblock
@@ -414,8 +416,7 @@ static int chkSuper(struct super_block *sb)
 	sbi->ait2 = j_sb->s_ait2;
 
       out:
-	release_metapage(mp);
-
+	brelse(bh);
 	return rc;
 }
 
@@ -429,7 +430,7 @@ int updateSuper(struct super_block *sb, uint state)
 {
 	struct jfs_superblock *j_sb;
 	struct jfs_sb_info *sbi = JFS_SBI(sb);
-	metapage_t *mp;
+	struct buffer_head *bh;
 	int rc;
 
 	/*
@@ -438,10 +439,10 @@ int updateSuper(struct super_block *sb, uint state)
 	if (sbi->state == FM_DIRTY)
 		return 0;
 
-	if ((rc = readSuper(sb, &mp)))
+	if ((rc = readSuper(sb, &bh)))
 		return rc;
 
-	j_sb = (struct jfs_superblock *) (mp->data);
+	j_sb = (struct jfs_superblock *)bh->b_data;
 
 	j_sb->s_state = cpu_to_le32(state);
 	sbi->state = state;
@@ -459,7 +460,10 @@ int updateSuper(struct super_block *sb, uint state)
 			j_sb->s_flag |= cpu_to_le32(JFS_DASD_PRIME);
 	}
 
-	flush_metapage(mp);
+	mark_buffer_dirty(bh);
+	ll_rw_block(WRITE, 1, &bh);
+	wait_on_buffer(bh);
+	brelse(bh);
 
 	return 0;
 }
@@ -470,18 +474,19 @@ int updateSuper(struct super_block *sb, uint state)
  *
  * read superblock by raw sector address
  */
-int readSuper(struct super_block *sb, metapage_t ** mpp)
+int readSuper(struct super_block *sb, struct buffer_head **bpp)
 {
 	/* read in primary superblock */
-	*mpp = read_metapage(JFS_SBI(sb)->direct_inode,
-			     SUPER1_OFF >> sb->s_blocksize_bits, PSIZE, 1);
-	if (*mpp == NULL) {
+	*bpp = sb_bread(sb, SUPER1_OFF >> sb->s_blocksize_bits);
+	if (bpp)
+		return 0;
+
 	/* read in secondary/replicated superblock */
-		*mpp = read_metapage(JFS_SBI(sb)->direct_inode,
-				     SUPER2_OFF >> sb->s_blocksize_bits,
-				     PSIZE, 1);
-	}
-	return *mpp ? 0 : 1;
+	*bpp = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);
+	if (bpp)
+		return 0;
+
+	return -EIO;
 }
 
 

fs/jfs/jfs_superblock.h

@@ -106,7 +106,7 @@ struct jfs_superblock {
 
 };
 
-extern int readSuper(struct super_block *, struct metapage **);
+extern int readSuper(struct super_block *, struct buffer_head **);
 extern int updateSuper(struct super_block *, uint);
 
 #endif /*_H_JFS_SUPERBLOCK */

fs/jfs/jfs_txnmgr.c

@@ -144,7 +144,6 @@ struct {
  */
 extern int lmGroupCommit(log_t * log, tblock_t * tblk);
 extern void lmSync(log_t *);
-extern int readSuper(struct super_block *sb, metapage_t ** bpp);
 extern int jfs_commit_inode(struct inode *, int);
 extern int jfs_stop_threads;
 

fs/jfs/jfs_umount.c

@@ -49,13 +49,14 @@
  */
 int jfs_umount(struct super_block *sb)
 {
-	int rc = 0;
-	log_t *log;
+	struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
 	struct jfs_sb_info *sbi = JFS_SBI(sb);
 	struct inode *ipbmap = sbi->ipbmap;
 	struct inode *ipimap = sbi->ipimap;
 	struct inode *ipaimap = sbi->ipaimap;
 	struct inode *ipaimap2 = sbi->ipaimap2;
+	log_t *log;
+	int rc = 0;
 
 	jFYI(1, ("\n	UnMount JFS: sb:0x%p\n", sb));
 
@@ -112,8 +113,8 @@ int jfs_umount(struct super_block *sb)
 	 * Make sure all metadata makes it to disk before we mark
 	 * the superblock as clean
 	 */
-	filemap_fdatawrite(sbi->direct_inode->i_mapping);
-	filemap_fdatawait(sbi->direct_inode->i_mapping);
+	filemap_fdatawrite(bdev_mapping);
+	filemap_fdatawait(bdev_mapping);
 
 	/*
 	 * ensure all file system file pages are propagated to their
@@ -140,6 +141,7 @@ int jfs_umount(struct super_block *sb)
 
 int jfs_umount_rw(struct super_block *sb)
 {
+	struct address_space *bdev_mapping = sb->s_bdev->bd_inode->i_mapping;
 	struct jfs_sb_info *sbi = JFS_SBI(sb);
 	log_t *log = sbi->log;
 
@@ -158,8 +160,15 @@ int jfs_umount_rw(struct super_block *sb)
 	 */
 	dbSync(sbi->ipbmap);
 	diSync(sbi->ipimap);
-	filemap_fdatawrite(sbi->direct_inode->i_mapping);
-	filemap_fdatawait(sbi->direct_inode->i_mapping);
+
+	/*
+	 * Note that we have to do this even if sync_blockdev() will
+	 * do exactly the same a few instructions later:  We can't
+	 * mark the superblock clean before everything is flushed to
+	 * disk.
+	 */
+	filemap_fdatawrite(bdev_mapping);
+	filemap_fdatawait(bdev_mapping);
 
 	updateSuper(sb, FM_CLEAN);
 	sbi->log = NULL;

fs/jfs/namei.c

@@ -29,7 +29,6 @@
 
 extern struct inode_operations jfs_file_inode_operations;
 extern struct inode_operations jfs_symlink_inode_operations;
-extern struct inode_operations jfs_special_inode_operations;
 extern struct file_operations jfs_file_operations;
 extern struct address_space_operations jfs_aops;
 
@@ -1338,7 +1337,7 @@ int jfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
 	if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
 		goto out3;
 
-	ip->i_op = &jfs_special_inode_operations;
+	ip->i_op = &jfs_file_inode_operations;
 	init_special_inode(ip, ip->i_mode, rdev);
 
 	insert_inode_hash(ip);

fs/jfs/resize.c

@@ -79,9 +79,8 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	int log_formatted = 0;
 	struct inode *iplist[1];
 	struct jfs_superblock *j_sb, *j_sb2;
-	metapage_t *sbp, *sb2p;
 	uint old_agsize;
-	struct buffer_head *bh;
+	struct buffer_head *bh, *bh2;
 
 	/* If the volume hasn't grown, get out now */
 
@@ -230,9 +229,9 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 		 */
 
 		/* read in superblock */
-		if ((rc = readSuper(sb, &sbp)))
+		if ((rc = readSuper(sb, &bh)))
 			goto error_out;
-		j_sb = (struct jfs_superblock *) (sbp->data);
+		j_sb = (struct jfs_superblock *)bh->b_data;
 
 		/* mark extendfs() in progress */
 		j_sb->s_state |= cpu_to_le32(FM_EXTENDFS);
@@ -243,7 +242,10 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 		PXDlength(&j_sb->s_xlogpxd, newLogSize);
 
 		/* synchronously update superblock */
-		flush_metapage(sbp);
+		mark_buffer_dirty(bh);
+		ll_rw_block(WRITE, 1, &bh);
+		wait_on_buffer(bh);
+		brelse(bh);
 
 		/*
 		 * format new inline log synchronously;
@@ -474,12 +476,13 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 
 	diWriteSpecial(ipbmap2, 1);
 	diFreeSpecial(ipbmap2);
+
 	/*
 	 *      update superblock
 	 */
-	if ((rc = readSuper(sb, &sbp)))
+	if ((rc = readSuper(sb, &bh)))
 		goto error_out;
-	j_sb = (struct jfs_superblock *) (sbp->data);
+	j_sb = (struct jfs_superblock *)bh->b_data;
 
 	/* mark extendfs() completion */
 	j_sb->s_state &= cpu_to_le32(~FM_EXTENDFS);
@@ -503,17 +506,22 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
 	/* sb->s_fsckloglen remains the same */
 
 	/* Update secondary superblock */
-	sb2p = read_metapage(sbi->direct_inode,
-			     SUPER2_OFF >> sb->s_blocksize_bits, PSIZE, 1);
-
-	if (sb2p) {
-		j_sb2 = (struct jfs_superblock *) (sb2p->data);
+	bh2 = sb_bread(sb, SUPER2_OFF >> sb->s_blocksize_bits);
+	if (bh2) {
+		j_sb2 = (struct jfs_superblock *)bh2->b_data;
 		memcpy(j_sb2, j_sb, sizeof (struct jfs_superblock));
-		flush_metapage(sb2p);
+
+		mark_buffer_dirty(bh);
+		ll_rw_block(WRITE, 1, &bh2);
+		wait_on_buffer(bh2);
+		brelse(bh);
 	}
 
 	/* write primary superblock */
-	flush_metapage(sbp);
+	mark_buffer_dirty(bh);
+	ll_rw_block(WRITE, 1, &bh);
+	wait_on_buffer(bh);
+	brelse(bh);
 
 	goto resume;
 

fs/jfs/super.c

@@ -142,17 +142,6 @@ static void jfs_put_super(struct super_block *sb)
 	unload_nls(sbi->nls_tab);
 	sbi->nls_tab = NULL;
 
-	/*
-	 * We need to clean out the direct_inode pages since this inode
-	 * is not in the inode hash.
-	 */
-	filemap_fdatawrite(sbi->direct_inode->i_mapping);
-	filemap_fdatawait(sbi->direct_inode->i_mapping);
-	truncate_inode_pages(sbi->direct_mapping, 0);
-	iput(sbi->direct_inode);
-	sbi->direct_inode = NULL;
-	sbi->direct_mapping = NULL;
-
 	kfree(sbi);
 }
 
@@ -221,7 +210,6 @@ static int parse_options(char *options, struct super_block *sb, s64 *newLVSize)
 
 int jfs_remount(struct super_block *sb, int *flags, char *data)
 {
-	struct jfs_sb_info *sbi = JFS_SBI(sb);
 	s64 newLVSize = 0;
 	int rc = 0;
 
@@ -239,15 +227,9 @@ int jfs_remount(struct super_block *sb, int *flags, char *data)
 			return rc;
 	}
 
-	if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
-		/*
-		 * Invalidate any previously read metadata.  fsck may
-		 * have changed the on-disk data since we mounted r/o
-		 */
-		truncate_inode_pages(sbi->direct_mapping, 0);
-
+	if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY))
 		return jfs_mount_rw(sb, 1);
-	} else if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY))
+	else if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY))
 		return jfs_umount_rw(sb);
 
 	return 0;
@@ -289,28 +271,13 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_op = &jfs_super_operations;
 	sb->s_export_op = &jfs_export_operations;
 
-	/*
-	 * Initialize direct-mapping inode/address-space
-	 */
-	inode = new_inode(sb);
-	if (inode == NULL)
-		goto out_kfree;
-	inode->i_ino = 0;
-	inode->i_nlink = 1;
-	inode->i_size = 0x0000010000000000LL;
-	inode->i_mapping->a_ops = &direct_aops;
-	inode->i_mapping->gfp_mask = GFP_NOFS;
-
-	sbi->direct_inode = inode;
-	sbi->direct_mapping = inode->i_mapping;
-
 	rc = jfs_mount(sb);
 	if (rc) {
 		if (!silent) {
 			jERROR(1,
 			       ("jfs_mount failed w/return code = %d\n", rc));
 		}
-		goto out_mount_failed;
+		goto out_kfree;
 	}
 	if (sb->s_flags & MS_RDONLY)
 		sbi->log = 0;
@@ -360,14 +327,6 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
 	if (rc) {
 		jERROR(1, ("jfs_umount failed with return code %d\n", rc));
 	}
-out_mount_failed:
-	filemap_fdatawrite(sbi->direct_inode->i_mapping);
-	filemap_fdatawait(sbi->direct_inode->i_mapping);
-	truncate_inode_pages(sbi->direct_mapping, 0);
-	make_bad_inode(sbi->direct_inode);
-	iput(sbi->direct_inode);
-	sbi->direct_inode = NULL;
-	sbi->direct_mapping = NULL;
 out_kfree:
 	if (sbi->nls_tab)
 		unload_nls(sbi->nls_tab);

fs/jfs/xattr.c

@@ -79,10 +79,10 @@ struct ea_buffer {
 #define EA_MALLOC	0x0008
 
 /* Forward references */
-void ea_release(struct inode *inode, struct ea_buffer *ea_buf);
+static void ea_release(struct inode *inode, struct ea_buffer *ea_buf);
 
 /*
- * NAME: jfs_WriteEAInLine
+ * NAME: ea_write_inline
  *                                                                    
  * FUNCTION: Attempt to write an EA inline if area is available
  *                                                                    
@@ -103,7 +103,7 @@ void ea_release(struct inode *inode, struct ea_buffer *ea_buf);
  *
  * RETURNS: 0 for successful copy to inline area; -1 if area not available
  */
-static int jfs_WriteEAInLine(struct inode *ip, struct jfs_ea_list *ealist,
+static int ea_write_inline(struct inode *ip, struct jfs_ea_list *ealist,
 			   int size, dxd_t * ea)
 {
 	struct jfs_inode_info *ji = JFS_IP(ip);
@@ -144,7 +144,7 @@ static int jfs_WriteEAInLine(struct inode *ip, struct jfs_ea_list *ealist,
 }
 
 /*
- * NAME: jfs_WriteEA
+ * NAME: ea_write
  *                                                                    
  * FUNCTION: Write an EA for an inode
  *                                                                    
@@ -162,7 +162,7 @@ static int jfs_WriteEAInLine(struct inode *ip, struct jfs_ea_list *ealist,
  *
  * RETURNS: 0 for success; Anything else indicates failure
  */
-static int jfs_WriteEA(struct inode *ip, struct jfs_ea_list *ealist, int size,
+static int ea_write(struct inode *ip, struct jfs_ea_list *ealist, int size,
 		       dxd_t * ea)
 {
 	struct super_block *sb = ip->i_sb;
@@ -181,7 +181,7 @@ static int jfs_WriteEA(struct inode *ip, struct jfs_ea_list *ealist, int size,
 	 * and empty EAs are all in-linable, provided the space exists.
 	 */
 	if (!ealist || size <= sizeof (ji->i_inline_ea)) {
-		if (!jfs_WriteEAInLine(ip, ealist, size, ea))
+		if (!ea_write_inline(ip, ealist, size, ea))
 			return 0;
 	}
 
@@ -257,7 +257,7 @@ static int jfs_WriteEA(struct inode *ip, struct jfs_ea_list *ealist, int size,
 }
 
 /*
- * NAME: jfs_ReadEAInLine
+ * NAME: ea_read_inline
  *                                                                    
  * FUNCTION: Read an inlined EA into user's buffer
  *                                                                    
@@ -267,7 +267,7 @@ static int jfs_WriteEA(struct inode *ip, struct jfs_ea_list *ealist, int size,
  *
  * RETURNS: 0
  */
-static int jfs_ReadEAInLine(struct inode *ip, struct jfs_ea_list *ealist)
+static int ea_read_inline(struct inode *ip, struct jfs_ea_list *ealist)
 {
 	struct jfs_inode_info *ji = JFS_IP(ip);
 	int ea_size = sizeDXD(&ji->ea);
@@ -288,7 +288,7 @@ static int jfs_ReadEAInLine(struct inode *ip, struct jfs_ea_list *ealist)
 }
 
 /*
- * NAME: jfs_ReadEA
+ * NAME: ea_read
  *                                                                    
  * FUNCTION: copy EA data into user's buffer
  *                                                                    
@@ -296,11 +296,11 @@ static int jfs_ReadEAInLine(struct inode *ip, struct jfs_ea_list *ealist)
  *	ip	- Inode pointer
  *	ealist	- Pointer to buffer to fill in with EA
  *
- * NOTES:  If EA is inline calls jfs_ReadEAInLine() to copy EA.
+ * NOTES:  If EA is inline calls ea_read_inline() to copy EA.
  *
  * RETURNS: 0 for success; other indicates failure
  */
-static int jfs_ReadEA(struct inode *ip, struct jfs_ea_list *ealist)
+static int ea_read(struct inode *ip, struct jfs_ea_list *ealist)
 {
 	struct super_block *sb = ip->i_sb;
 	struct jfs_inode_info *ji = JFS_IP(ip);
@@ -315,7 +315,7 @@ static int jfs_ReadEA(struct inode *ip, struct jfs_ea_list *ealist)
 
 	/* quick check for in-line EA */
 	if (ji->ea.flag & DXD_INLINE)
-		return jfs_ReadEAInLine(ip, ealist);
+		return ea_read_inline(ip, ealist);
 
 	nbytes = sizeDXD(&ji->ea);
 	assert(nbytes);
@@ -372,7 +372,7 @@ static int jfs_ReadEA(struct inode *ip, struct jfs_ea_list *ealist)
  *
  * RETURNS: 0 for success; Other indicates failure
  */
-int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
+static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
 {
 	struct jfs_inode_info *ji = JFS_IP(inode);
 	struct super_block *sb = inode->i_sb;
@@ -436,8 +436,7 @@ int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
 		if (ea_size == 0)
 			return 0;
 
-		rc = jfs_ReadEA(inode, ea_buf->xattr);
-		if (rc) {
+		if ((rc = ea_read(inode, ea_buf->xattr))) {
 			kfree(ea_buf->xattr);
 			ea_buf->xattr = NULL;
 			return rc;
@@ -472,8 +471,7 @@ int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
 		    ~(sb->s_blocksize - 1);
 		if (ea_size == 0)
 			return 0;
-		rc = jfs_ReadEA(inode, ea_buf->xattr);
-		if (rc) {
+		if ((rc = ea_read(inode, ea_buf->xattr))) {
 			discard_metapage(ea_buf->mp);
 			dbFree(inode, blkno, (s64) blocks_needed);
 			return rc;
@@ -500,7 +498,7 @@ int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
 	return ea_size;
 }
 
-void ea_release(struct inode *inode, struct ea_buffer *ea_buf)
+static void ea_release(struct inode *inode, struct ea_buffer *ea_buf)
 {
 	if (ea_buf->flag & EA_MALLOC)
 		kfree(ea_buf->xattr);
@@ -514,7 +512,7 @@ void ea_release(struct inode *inode, struct ea_buffer *ea_buf)
 	}
 }
 
-int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
+static int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
 {
 	struct jfs_inode_info *ji = JFS_IP(inode);
 	unsigned long old_blocks, new_blocks;
@@ -532,16 +530,14 @@ int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size)
 		DXDaddress(&ea_buf->new_ea, 0);
 		DXDlength(&ea_buf->new_ea, 0);
 	} else if (ea_buf->flag & EA_MALLOC) {
-		rc = jfs_WriteEA(inode, ea_buf->xattr, new_size,
-				 &ea_buf->new_ea);
+		rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea);
 		kfree(ea_buf->xattr);
 	} else if (ea_buf->flag & EA_NEW) {
 		/* We have already allocated a new dxd */
 		flush_metapage(ea_buf->mp);
 	} else {
 		/* ->xattr must point to original ea's metapage */
-		rc = jfs_WriteEA(inode, ea_buf->xattr, new_size,
-				 &ea_buf->new_ea);
+		rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea);
 		discard_metapage(ea_buf->mp);
 	}
 	if (rc)

include/linux/fs.h

@@ -368,7 +368,7 @@ struct inode {
 	atomic_t		i_count;
 	dev_t			i_dev;
 	umode_t			i_mode;
-	nlink_t			i_nlink;
+	unsigned int		i_nlink;
 	uid_t			i_uid;
 	gid_t			i_gid;
 	kdev_t			i_rdev;

include/linux/ide.h

@@ -464,7 +464,6 @@ typedef struct ide_drive_s {
 	byte     nice1;			/* flag: give potential excess bandwidth */
 	unsigned present	: 1;	/* drive is physically present */
 	unsigned noprobe 	: 1;	/* from:  hdx=noprobe */
-	unsigned busy		: 1;	/* currently doing revalidate_disk() */
 	unsigned removable	: 1;	/* 1 if need to do check_media_change */
 	unsigned forced_geom	: 1;	/* 1 if hdx=c,h,s was given at boot */
 	unsigned no_unmask	: 1;	/* disallow setting unmask bit */
@@ -506,7 +505,6 @@ typedef struct ide_drive_s {
 	unsigned long long capacity48;	/* total number of sectors */
 	unsigned int	drive_data;	/* for use by tuneproc/selectproc as needed */
 	struct hwif_s	  *hwif;	/* actually (ide_hwif_t *) */
-	wait_queue_head_t wqueue;	/* used to wait for drive in open() */
 	struct hd_driveid *id;		/* drive model identification info */
 	struct hd_struct  *part;	/* drive partition table */
 	char		name[4];	/* drive name, such as "hda" */

include/linux/sched.h

@@ -455,7 +455,7 @@ extern struct task_struct init_task;
 extern struct   mm_struct init_mm;
 
 /* PID hashing. (shouldnt this be dynamic?) */
-#define PIDHASH_SZ (4096 >> 2)
+#define PIDHASH_SZ 8192
 extern struct task_struct *pidhash[PIDHASH_SZ];
 
 #define pid_hashfn(x)	((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))

include/linux/sysctl.h

@@ -127,6 +127,7 @@ enum
 	KERN_CORE_USES_PID=52,		/* int: use core or core.%pid */
 	KERN_TAINTED=53,	/* int: various kernel tainted flags */
 	KERN_CADPID=54,		/* int: PID of the process to notify on CAD */
+	KERN_PIDMAX=55,		/* int: PID # limit */
 };
 
 

include/linux/threads.h

@@ -19,7 +19,6 @@
 /*
  * This controls the maximum pid allocated to a process
  */
-#define PID_MASK 0x3fffffff
-#define PID_MAX (PID_MASK+1)
+#define DEFAULT_PID_MAX 0x8000
 
 #endif

kernel/exit.c

@@ -66,7 +66,8 @@ static void release_task(struct task_struct * p)
 	atomic_dec(&p->user->processes);
 	security_ops->task_free_security(p);
 	free_uid(p->user);
-	BUG_ON(!list_empty(&p->ptrace_list) || !list_empty(&p->ptrace_children));
+	BUG_ON(p->ptrace || !list_empty(&p->ptrace_list) ||
+					!list_empty(&p->ptrace_children));
 	unhash_process(p);
 
 	release_thread(p);
@@ -718,8 +719,14 @@ asmlinkage long sys_wait4(pid_t pid,unsigned int * stat_addr, int options, struc
 					ptrace_unlink(p);
 					do_notify_parent(p, SIGCHLD);
 					write_unlock_irq(&tasklist_lock);
-				} else
+				} else {
+					if (p->ptrace) {
+						write_lock_irq(&tasklist_lock);
+						ptrace_unlink(p);
+						write_unlock_irq(&tasklist_lock);
+					}
 					release_task(p);
+				}
 				goto end_wait4;
 			default:
 				continue;

kernel/fork.c

@@ -46,6 +46,14 @@ int nr_threads;
 
 int max_threads;
 unsigned long total_forks;	/* Handle normal Linux uptimes. */
+
+/*
+ * Protects next_safe, last_pid and pid_max:
+ */
+spinlock_t lastpid_lock = SPIN_LOCK_UNLOCKED;
+
+static int next_safe = DEFAULT_PID_MAX;
+int pid_max = DEFAULT_PID_MAX;
 int last_pid;
 
 struct task_struct *pidhash[PIDHASH_SZ];
@@ -151,11 +159,8 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
 	return tsk;
 }
 
-spinlock_t lastpid_lock = SPIN_LOCK_UNLOCKED;
-
 static int get_pid(unsigned long flags)
 {
-	static int next_safe = PID_MAX;
 	struct task_struct *p;
 	int pid;
 
@@ -163,34 +168,35 @@ static int get_pid(unsigned long flags)
 		return 0;
 
 	spin_lock(&lastpid_lock);
-	if((++last_pid) & ~PID_MASK) {
+	if (++last_pid > pid_max) {
 		last_pid = 300;		/* Skip daemons etc. */
 		goto inside;
 	}
-	if(last_pid >= next_safe) {
+
+	if (last_pid >= next_safe) {
 inside:
-		next_safe = PID_MAX;
+		next_safe = pid_max;
 		read_lock(&tasklist_lock);
 	repeat:
 		for_each_task(p) {
-			if(p->pid == last_pid	||
+			if (p->pid == last_pid	||
 			   p->pgrp == last_pid	||
 			   p->tgid == last_pid	||
 			   p->session == last_pid) {
-				if(++last_pid >= next_safe) {
-					if(last_pid & ~PID_MASK)
+				if (++last_pid >= next_safe) {
+					if (last_pid >= pid_max)
 						last_pid = 300;
-					next_safe = PID_MAX;
+					next_safe = pid_max;
 				}
 				goto repeat;
 			}
-			if(p->pid > last_pid && next_safe > p->pid)
+			if (p->pid > last_pid && next_safe > p->pid)
 				next_safe = p->pid;
-			if(p->pgrp > last_pid && next_safe > p->pgrp)
+			if (p->pgrp > last_pid && next_safe > p->pgrp)
 				next_safe = p->pgrp;
-			if(p->tgid > last_pid && next_safe > p->tgid)
+			if (p->tgid > last_pid && next_safe > p->tgid)
 				next_safe = p->tgid;
-			if(p->session > last_pid && next_safe > p->session)
+			if (p->session > last_pid && next_safe > p->session)
 				next_safe = p->session;
 		}
 		read_unlock(&tasklist_lock);

kernel/ptrace.c

@@ -29,7 +29,7 @@ void __ptrace_link(task_t *child, task_t *new_parent)
 	if (!list_empty(&child->ptrace_list))
 		BUG();
 	if (child->parent == new_parent)
-		BUG();
+		return;
 	list_add(&child->ptrace_list, &child->parent->ptrace_children);
 	REMOVE_LINKS(child);
 	child->parent = new_parent;

kernel/sysctl.c

@@ -51,6 +51,7 @@ extern int max_queued_signals;
 extern int sysrq_enabled;
 extern int core_uses_pid;
 extern int cad_pid;
+extern int pid_max;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
@@ -255,6 +256,8 @@ static ctl_table kern_table[] = {
 	{KERN_S390_USER_DEBUG_LOGGING,"userprocess_debug",
 	 &sysctl_userprocess_debug,sizeof(int),0644,NULL,&proc_dointvec},
 #endif
+	{KERN_PIDMAX, "pid_max", &pid_max, sizeof (int),
+	 0600, NULL, &proc_dointvec},
 	{0}
 };