Merge

arch/i386/kernel/irq.c

@@ -338,9 +338,9 @@ asmlinkage unsigned int do_IRQ(struct pt_regs regs)
 
 		__asm__ __volatile__("andl %%esp,%0" :
 					"=r" (esp) : "0" (8191));
-		if (unlikely(esp < (sizeof(struct task_struct) + 1024))) {
+		if (unlikely(esp < (sizeof(struct thread_info) + 1024))) {
 			printk("do_IRQ: stack overflow: %ld\n",
-				esp - sizeof(struct task_struct));
+				esp - sizeof(struct thread_info));
 			dump_stack();
 		}
 	}

drivers/block/floppy.c

@@ -2911,7 +2911,11 @@ static void redo_fd_request(void)
 
 	for (;;) {
 		if (!current_req) {
-			struct request *req = elv_next_request(&floppy_queue);
+			struct request *req;
+
+			spin_lock_irq(floppy_queue.queue_lock);
+			req = elv_next_request(&floppy_queue);
+			spin_unlock_irq(floppy_queue.queue_lock);
 			if (!req) {
 				do_floppy = NULL;
 				unlock_fdc();

drivers/net/pcmcia/3c574_cs.c

@@ -305,6 +305,7 @@ static dev_link_t *tc574_attach(void)
 	link = &lp->link; dev = &lp->dev;
 	link->priv = dev->priv = link->irq.Instance = lp;
 	
+	init_timer(&link->release);
 	link->release.function = &tc574_release;
 	link->release.data = (u_long)link;
 	link->io.NumPorts1 = 32;

drivers/net/pcmcia/3c589_cs.c

@@ -229,6 +229,7 @@ static dev_link_t *tc589_attach(void)
     link = &lp->link; dev = &lp->dev;
     link->priv = dev->priv = link->irq.Instance = lp;
     
+    init_timer(&link->release);
     link->release.function = &tc589_release;
     link->release.data = (unsigned long)link;
     link->io.NumPorts1 = 16;

drivers/net/pcmcia/aironet4500_cs.c

@@ -246,6 +246,7 @@ static dev_link_t *awc_attach(void)
 
 	memset(link->dev, 0, sizeof(struct dev_node_t));
 
+	init_timer(&link->release);
 	link->release.function = &awc_release;
 	link->release.data = (u_long)link;
 //	link->io.NumPorts1 = 32;

drivers/net/pcmcia/axnet_cs.c

@@ -203,6 +203,7 @@ static dev_link_t *axnet_attach(void)
     link = &info->link; dev = &info->dev;
     link->priv = info;
     
+    init_timer(&link->release);
     link->release.function = &axnet_release;
     link->release.data = (u_long)link;
     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;

drivers/net/pcmcia/com20020_cs.c

@@ -221,6 +221,7 @@ static dev_link_t *com20020_attach(void)
     memset(link, 0, sizeof(struct dev_link_t));
     dev->priv = lp;
 
+    init_timer(&link->release);
     link->release.function = &com20020_release;
     link->release.data = (u_long)link;
     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;

drivers/net/pcmcia/ibmtr_cs.c

@@ -221,6 +221,7 @@ static dev_link_t *ibmtr_attach(void)
     memset(info, 0, sizeof(*info));
     link = &info->link; link->priv = info;
 
+    init_timer(&link->release);
     link->release.function = &ibmtr_release;
     link->release.data = (u_long)link;
     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;

drivers/net/pcmcia/nmclan_cs.c

@@ -493,6 +493,7 @@ static dev_link_t *nmclan_attach(void)
     link = &lp->link; dev = &lp->dev;
     link->priv = dev->priv = link->irq.Instance = lp;
 
+    init_timer(&link->release);
     link->release.function = &nmclan_release;
     link->release.data = (u_long)link;
     link->io.NumPorts1 = 32;

drivers/net/pcmcia/ray_cs.c

@@ -378,6 +378,7 @@ static dev_link_t *ray_attach(void)
     memset(dev, 0, sizeof(struct net_device));
     memset(local, 0, sizeof(ray_dev_t));
 
+    init_timer(&link->release);
     link->release.function = &ray_release;
     link->release.data = (u_long)link;
 

drivers/net/pcmcia/xirc2ps_cs.c

@@ -632,6 +632,7 @@ xirc2ps_attach(void)
     link = &local->link; dev = &local->dev;
     link->priv = dev->priv = local;
 
+    init_timer(&link->release);
     link->release.function = &xirc2ps_release;
     link->release.data = (u_long) link;
 

drivers/net/wireless/airo_cs.c

@@ -216,6 +216,7 @@ static dev_link_t *airo_attach(void)
 		return NULL;
 	}
 	memset(link, 0, sizeof(struct dev_link_t));
+	init_timer(&link->release);
 	link->release.function = &airo_release;
 	link->release.data = (u_long)link;
 	

drivers/net/wireless/netwave_cs.c

@@ -462,6 +462,7 @@ static dev_link_t *netwave_attach(void)
     memset(priv, 0, sizeof(*priv));
     link = &priv->link; dev = &priv->dev;
     link->priv = dev->priv = priv;
+    init_timer(&link->release);
     link->release.function = &netwave_release;
     link->release.data = (u_long)link;
 	

drivers/net/wireless/orinoco_cs.c

@@ -203,6 +203,7 @@ orinoco_cs_attach(void)
 	link->priv = dev;
 
 	/* Initialize the dev_link_t structure */
+	init_timer(&link->release);
 	link->release.function = &orinoco_cs_release;
 	link->release.data = (u_long) link;
 

drivers/parport/parport_cs.c

@@ -134,6 +134,7 @@ static dev_link_t *parport_attach(void)
     memset(info, 0, sizeof(*info));
     link = &info->link; link->priv = info;
 
+    init_timer(&link->release);
     link->release.function = &parport_cs_release;
     link->release.data = (u_long)link;
     link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;

drivers/scsi/pcmcia/aha152x_stub.c

@@ -142,6 +142,7 @@ static dev_link_t *aha152x_attach(void)
     if (!info) return NULL;
     memset(info, 0, sizeof(*info));
     link = &info->link; link->priv = info;
+    init_timer(&link->release);
     link->release.function = &aha152x_release_cs;
     link->release.data = (u_long)link;
 

drivers/scsi/pcmcia/fdomain_stub.c

@@ -122,6 +122,7 @@ static dev_link_t *fdomain_attach(void)
     if (!info) return NULL;
     memset(info, 0, sizeof(*info));
     link = &info->link; link->priv = info;
+    init_timer(&link->release);
     link->release.function = &fdomain_release;
     link->release.data = (u_long)link;
 

drivers/scsi/pcmcia/qlogic_stub.c

@@ -126,6 +126,7 @@ static dev_link_t *qlogic_attach(void)
 	memset(info, 0, sizeof(*info));
 	link = &info->link;
 	link->priv = info;
+	init_timer(&link->release);
 	link->release.function = &qlogic_release;
 	link->release.data = (u_long) link;
 

drivers/telephony/ixj_pcmcia.c

@@ -63,6 +63,7 @@ static dev_link_t *ixj_attach(void)
 	if (!link)
 		return NULL;
 	memset(link, 0, sizeof(struct dev_link_t));
+	init_timer(&link->release);
 	link->release.function = &ixj_cs_release;
 	link->release.data = (u_long) link;
 	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;

fs/buffer.c

@@ -81,21 +81,11 @@ init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
  * Return the address of the waitqueue_head to be used for this
  * buffer_head
  */
-static wait_queue_head_t *bh_waitq_head(struct buffer_head *bh)
+wait_queue_head_t *bh_waitq_head(struct buffer_head *bh)
 {
 	return &bh_wait_queue_heads[hash_ptr(bh, BH_WAIT_TABLE_ORDER)].wqh;
 }
-
-/*
- * Wait on a buffer until someone does a wakeup on it.  Needs
- * lots of external locking.  ext3 uses this.  Fix it.
- */
-void sleep_on_buffer(struct buffer_head *bh)
-{
-	wait_queue_head_t *wq = bh_waitq_head(bh);
-	sleep_on(wq);
-}
-EXPORT_SYMBOL(sleep_on_buffer);
+EXPORT_SYMBOL(bh_waitq_head);
 
 void wake_up_buffer(struct buffer_head *bh)
 {
@@ -139,7 +129,7 @@ void __wait_on_buffer(struct buffer_head * bh)
 		prepare_to_wait(wqh, &wait, TASK_UNINTERRUPTIBLE);
 		blk_run_queues();
 		if (buffer_locked(bh))
-			schedule();
+			io_schedule();
 	} while (buffer_locked(bh));
 	put_bh(bh);
 	finish_wait(wqh, &wait);

fs/dcache.c

@@ -1147,21 +1147,24 @@ static char * __d_path( struct dentry *dentry, struct vfsmount *vfsmnt,
 		namelen = dentry->d_name.len;
 		buflen -= namelen + 1;
 		if (buflen < 0)
-			break;
+			return ERR_PTR(-ENAMETOOLONG);
 		end -= namelen;
 		memcpy(end, dentry->d_name.name, namelen);
 		*--end = '/';
 		retval = end;
 		dentry = parent;
 	}
+
 	return retval;
+
 global_root:
 	namelen = dentry->d_name.len;
 	buflen -= namelen;
 	if (buflen >= 0) {
 		retval -= namelen-1;	/* hit the slash */
 		memcpy(retval, dentry->d_name.name, namelen);
-	}
+	} else
+		retval = ERR_PTR(-ENAMETOOLONG);
 	return retval;
 }
 
@@ -1229,6 +1232,10 @@ asmlinkage long sys_getcwd(char *buf, unsigned long size)
 		cwd = __d_path(pwd, pwdmnt, root, rootmnt, page, PAGE_SIZE);
 		spin_unlock(&dcache_lock);
 
+		error = PTR_ERR(cwd);
+		if (IS_ERR(cwd))
+			goto out;
+
 		error = -ERANGE;
 		len = PAGE_SIZE + page - cwd;
 		if (len <= size) {
@@ -1238,6 +1245,8 @@ asmlinkage long sys_getcwd(char *buf, unsigned long size)
 		}
 	} else
 		spin_unlock(&dcache_lock);
+
+out:
 	dput(pwd);
 	mntput(pwdmnt);
 	dput(root);

fs/direct-io.c

@@ -892,15 +892,14 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
 	
 		ret = do_direct_IO(dio);
 
-		if (ret) {
-			dio_cleanup(dio);
-			break;
-		}
-
 		dio->result += iov[seg].iov_len -
 			((dio->final_block_in_request - dio->block_in_file) <<
 					blkbits);
 
+		if (ret) {
+			dio_cleanup(dio);
+			break;
+		}
 	} /* end iovec loop */
 
 	/*

fs/dquot.c

@@ -159,7 +159,7 @@ static void put_quota_format(struct quota_format_type *fmt)
  * Note that any operation which operates on dquot data (ie. dq_dqb) must
  * hold dq_data_lock.
  *
- * Any operation working with dquots must hold dqoff_sem. If operation is
+ * Any operation working with dquots must hold dqptr_sem. If operation is
  * just reading pointers from inodes than read lock is enough. If pointers
  * are altered function must hold write lock.
  *
@@ -270,7 +270,7 @@ static int commit_dqblk(struct dquot *dquot)
 }
 
 /* Invalidate all dquots on the list. Note that this function is called after
- * quota is disabled so no new quota might be created. Because we hold dqoff_sem
+ * quota is disabled so no new quota might be created. Because we hold dqptr_sem
  * for writing and pointers were already removed from inodes we actually know that
  * no quota for this sb+type should be held. */
 static void invalidate_dquots(struct super_block *sb, int type)
@@ -287,7 +287,7 @@ static void invalidate_dquots(struct super_block *sb, int type)
 		if (dquot->dq_type != type)
 			continue;
 #ifdef __DQUOT_PARANOIA	
-		/* There should be no users of quota - we hold dqoff_sem for writing */
+		/* There should be no users of quota - we hold dqptr_sem for writing */
 		if (atomic_read(&dquot->dq_count))
 			BUG();
 #endif
@@ -307,7 +307,7 @@ static int vfs_quota_sync(struct super_block *sb, int type)
 	struct quota_info *dqopt = sb_dqopt(sb);
 	int cnt;
 
-	down_read(&dqopt->dqoff_sem);
+	down_read(&dqopt->dqptr_sem);
 restart:
 	/* At this point any dirty dquot will definitely be written so we can clear
 	   dirty flag from info */
@@ -340,7 +340,7 @@ static int vfs_quota_sync(struct super_block *sb, int type)
 	spin_lock(&dq_list_lock);
 	dqstats.syncs++;
 	spin_unlock(&dq_list_lock);
-	up_read(&dqopt->dqoff_sem);
+	up_read(&dqopt->dqptr_sem);
 
 	return 0;
 }
@@ -427,7 +427,7 @@ static int shrink_dqcache_memory(int nr, unsigned int gfp_mask)
 /*
  * Put reference to dquot
  * NOTE: If you change this function please check whether dqput_blocks() works right...
- * MUST be called with dqoff_sem held
+ * MUST be called with dqptr_sem held
  */
 static void dqput(struct dquot *dquot)
 {
@@ -492,7 +492,7 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
 
 /*
  * Get reference to dquot
- * MUST be called with dqoff_sem held
+ * MUST be called with dqptr_sem held
  */
 static struct dquot *dqget(struct super_block *sb, unsigned int id, int type)
 {
@@ -553,7 +553,7 @@ static int dqinit_needed(struct inode *inode, int type)
 	return 0;
 }
 
-/* This routine is guarded by dqoff_sem semaphore */
+/* This routine is guarded by dqptr_sem semaphore */
 static void add_dquot_ref(struct super_block *sb, int type)
 {
 	struct list_head *p;
@@ -586,7 +586,7 @@ static inline int dqput_blocks(struct dquot *dquot)
 }
 
 /* Remove references to dquots from inode - add dquot to list for freeing if needed */
-/* We can't race with anybody because we hold dqoff_sem for writing... */
+/* We can't race with anybody because we hold dqptr_sem for writing... */
 int remove_inode_dquot_ref(struct inode *inode, int type, struct list_head *tofree_head)
 {
 	struct dquot *dquot = inode->i_dquot[type];
@@ -829,10 +829,10 @@ void dquot_initialize(struct inode *inode, int type)
 	unsigned int id = 0;
 	int cnt;
 
-	down_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
-	/* Having dqoff lock we know NOQUOTA flags can't be altered... */
+	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
+	/* Having dqptr_sem we know NOQUOTA flags can't be altered... */
 	if (IS_NOQUOTA(inode)) {
-		up_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+		up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 		return;
 	}
 	/* Build list of quotas to initialize... */
@@ -853,7 +853,7 @@ void dquot_initialize(struct inode *inode, int type)
 				inode->i_flags |= S_QUOTA;
 		}
 	}
-	up_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 }
 
 /*
@@ -876,9 +876,9 @@ static void dquot_drop_nolock(struct inode *inode)
 
 void dquot_drop(struct inode *inode)
 {
-	down_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	dquot_drop_nolock(inode);
-	up_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 }
 
 /*
@@ -892,7 +892,7 @@ int dquot_alloc_space(struct inode *inode, qsize_t number, int warn)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warntype[cnt] = NOWARN;
 
-	down_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
@@ -910,7 +910,7 @@ int dquot_alloc_space(struct inode *inode, qsize_t number, int warn)
 warn_put_all:
 	spin_unlock(&dq_data_lock);
 	flush_warnings(inode->i_dquot, warntype);
-	up_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	return ret;
 }
 
@@ -924,7 +924,7 @@ int dquot_alloc_inode(const struct inode *inode, unsigned long number)
 
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warntype[cnt] = NOWARN;
-	down_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
@@ -942,7 +942,7 @@ int dquot_alloc_inode(const struct inode *inode, unsigned long number)
 warn_put_all:
 	spin_unlock(&dq_data_lock);
 	flush_warnings((struct dquot **)inode->i_dquot, warntype);
-	up_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	return ret;
 }
 
@@ -953,7 +953,7 @@ void dquot_free_space(struct inode *inode, qsize_t number)
 {
 	unsigned int cnt;
 
-	down_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
@@ -962,7 +962,7 @@ void dquot_free_space(struct inode *inode, qsize_t number)
 	}
 	inode_sub_bytes(inode, number);
 	spin_unlock(&dq_data_lock);
-	up_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 }
 
 /*
@@ -972,7 +972,7 @@ void dquot_free_inode(const struct inode *inode, unsigned long number)
 {
 	unsigned int cnt;
 
-	down_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (inode->i_dquot[cnt] == NODQUOT)
@@ -980,7 +980,7 @@ void dquot_free_inode(const struct inode *inode, unsigned long number)
 		dquot_decr_inodes(inode->i_dquot[cnt], number);
 	}
 	spin_unlock(&dq_data_lock);
-	up_read(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 }
 
 /*
@@ -1002,7 +1002,7 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 		transfer_to[cnt] = transfer_from[cnt] = NODQUOT;
 		warntype[cnt] = NOWARN;
 	}
-	down_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	down_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	if (IS_NOQUOTA(inode))	/* File without quota accounting? */
 		goto warn_put_all;
 	/* First build the transfer_to list - here we can block on reading of dquots... */
@@ -1058,7 +1058,7 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		if (transfer_from[cnt] != NODQUOT)
 			dqput(transfer_from[cnt]);
-	up_write(&sb_dqopt(inode->i_sb)->dqoff_sem);
+	up_write(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	return ret;
 }
 
@@ -1114,7 +1114,8 @@ int vfs_quota_off(struct super_block *sb, int type)
 		goto out;
 
 	/* We need to serialize quota_off() for device */
-	down_write(&dqopt->dqoff_sem);
+	down(&dqopt->dqonoff_sem);
+	down_write(&dqopt->dqptr_sem);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (type != -1 && cnt != type)
 			continue;
@@ -1145,7 +1146,8 @@ int vfs_quota_off(struct super_block *sb, int type)
 		dqopt->info[cnt].dqi_bgrace = 0;
 		dqopt->ops[cnt] = NULL;
 	}
-	up_write(&dqopt->dqoff_sem);
+	up_write(&dqopt->dqptr_sem);
+	up(&dqopt->dqonoff_sem);
 out:
 	return 0;
 }
@@ -1157,6 +1159,7 @@ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
 	struct quota_info *dqopt = sb_dqopt(sb);
 	struct quota_format_type *fmt = find_quota_format(format_id);
 	int error;
+	unsigned int oldflags;
 
 	if (!fmt)
 		return -ESRCH;
@@ -1176,15 +1179,17 @@ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
 	if (!S_ISREG(inode->i_mode))
 		goto out_f;
 
-	down_write(&dqopt->dqoff_sem);
+	down(&dqopt->dqonoff_sem);
+	down_write(&dqopt->dqptr_sem);
 	if (sb_has_quota_enabled(sb, type)) {
 		error = -EBUSY;
 		goto out_lock;
 	}
+	oldflags = inode->i_flags;
 	dqopt->files[type] = f;
 	error = -EINVAL;
 	if (!fmt->qf_ops->check_quota_file(sb, type))
-		goto out_lock;
+		goto out_file_init;
 	/* We don't want quota on quota files */
 	dquot_drop_nolock(inode);
 	inode->i_flags |= S_NOQUOTA;
@@ -1194,20 +1199,23 @@ int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path)
 	down(&dqopt->dqio_sem);
 	if ((error = dqopt->ops[type]->read_file_info(sb, type)) < 0) {
 		up(&dqopt->dqio_sem);
-		goto out_lock;
+		goto out_file_init;
 	}
 	up(&dqopt->dqio_sem);
 	set_enable_flags(dqopt, type);
+	up_write(&dqopt->dqptr_sem);
 
 	add_dquot_ref(sb, type);
+	up(&dqopt->dqonoff_sem);
 
-	up_write(&dqopt->dqoff_sem);
 	return 0;
 
-out_lock:
-	inode->i_flags &= ~S_NOQUOTA;
+out_file_init:
+	inode->i_flags = oldflags;
 	dqopt->files[type] = NULL;
-	up_write(&dqopt->dqoff_sem);
+out_lock:
+	up_write(&dqopt->dqptr_sem);
+	up(&dqopt->dqonoff_sem);
 out_f:
 	filp_close(f, NULL);
 out_fmt:
@@ -1238,14 +1246,14 @@ int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *d
 {
 	struct dquot *dquot;
 
-	down_read(&sb_dqopt(sb)->dqoff_sem);
+	down_read(&sb_dqopt(sb)->dqptr_sem);
 	if (!(dquot = dqget(sb, id, type))) {
-		up_read(&sb_dqopt(sb)->dqoff_sem);
+		up_read(&sb_dqopt(sb)->dqptr_sem);
 		return -ESRCH;
 	}
 	do_get_dqblk(dquot, di);
 	dqput(dquot);
-	up_read(&sb_dqopt(sb)->dqoff_sem);
+	up_read(&sb_dqopt(sb)->dqptr_sem);
 	return 0;
 }
 
@@ -1307,14 +1315,14 @@ int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *d
 {
 	struct dquot *dquot;
 
-	down_read(&sb_dqopt(sb)->dqoff_sem);
+	down_read(&sb_dqopt(sb)->dqptr_sem);
 	if (!(dquot = dqget(sb, id, type))) {
-		up_read(&sb_dqopt(sb)->dqoff_sem);
+		up_read(&sb_dqopt(sb)->dqptr_sem);
 		return -ESRCH;
 	}
 	do_set_dqblk(dquot, di);
 	dqput(dquot);
-	up_read(&sb_dqopt(sb)->dqoff_sem);
+	up_read(&sb_dqopt(sb)->dqptr_sem);
 	return 0;
 }
 
@@ -1323,9 +1331,9 @@ int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
 {
 	struct mem_dqinfo *mi;
   
-	down_read(&sb_dqopt(sb)->dqoff_sem);
+	down_read(&sb_dqopt(sb)->dqptr_sem);
 	if (!sb_has_quota_enabled(sb, type)) {
-		up_read(&sb_dqopt(sb)->dqoff_sem);
+		up_read(&sb_dqopt(sb)->dqptr_sem);
 		return -ESRCH;
 	}
 	mi = sb_dqopt(sb)->info + type;
@@ -1335,7 +1343,7 @@ int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
 	ii->dqi_flags = mi->dqi_flags & DQF_MASK;
 	ii->dqi_valid = IIF_ALL;
 	spin_unlock(&dq_data_lock);
-	up_read(&sb_dqopt(sb)->dqoff_sem);
+	up_read(&sb_dqopt(sb)->dqptr_sem);
 	return 0;
 }
 
@@ -1344,9 +1352,9 @@ int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
 {
 	struct mem_dqinfo *mi;
 
-	down_read(&sb_dqopt(sb)->dqoff_sem);
+	down_read(&sb_dqopt(sb)->dqptr_sem);
 	if (!sb_has_quota_enabled(sb, type)) {
-		up_read(&sb_dqopt(sb)->dqoff_sem);
+		up_read(&sb_dqopt(sb)->dqptr_sem);
 		return -ESRCH;
 	}
 	mi = sb_dqopt(sb)->info + type;
@@ -1359,7 +1367,7 @@ int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii)
 		mi->dqi_flags = (mi->dqi_flags & ~DQF_MASK) | (ii->dqi_flags & DQF_MASK);
 	mark_info_dirty(mi);
 	spin_unlock(&dq_data_lock);
-	up_read(&sb_dqopt(sb)->dqoff_sem);
+	up_read(&sb_dqopt(sb)->dqptr_sem);
 	return 0;
 }
 

fs/exec.c

@@ -873,12 +873,10 @@ int prepare_binprm(struct linux_binprm *bprm)
 
 void compute_creds(struct linux_binprm *bprm) 
 {
-	int do_unlock = 0;
-
+	task_lock(current);
 	if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {
                 current->mm->dumpable = 0;
 		
-		lock_kernel();
 		if (must_not_trace_exec(current)
 		    || atomic_read(&current->fs->count) > 1
 		    || atomic_read(&current->files->count) > 1
@@ -888,14 +886,12 @@ void compute_creds(struct linux_binprm *bprm)
 				bprm->e_gid = current->gid;
 			}
 		}
-		do_unlock = 1;
 	}
 
         current->suid = current->euid = current->fsuid = bprm->e_uid;
         current->sgid = current->egid = current->fsgid = bprm->e_gid;
 
-	if(do_unlock)
-		unlock_kernel();
+	task_unlock(current);
 
 	security_bprm_compute_creds(bprm);
 }

fs/ext2/balloc.c

@@ -334,22 +334,23 @@ int ext2_new_block (struct inode * inode, unsigned long goal,
 	if (!prealloc_count || *prealloc_count)
 		prealloc_goal = 0;
 
-	*err = -EDQUOT;
-	if (DQUOT_ALLOC_BLOCK(inode, 1))
+	if (DQUOT_ALLOC_BLOCK(inode, 1)) {
+		*err = -EDQUOT;
 		goto out;
+	}
 
 	while (prealloc_goal && DQUOT_PREALLOC_BLOCK(inode, prealloc_goal))
 		prealloc_goal--;
 
 	dq_alloc = prealloc_goal + 1;
 
-	*err = -ENOSPC;
-
 	lock_super (sb);
 
 	es_alloc = reserve_blocks(sb, dq_alloc);
-	if (!es_alloc)
+	if (!es_alloc) {
+		*err = -ENOSPC;
 		goto out_unlock;
+	}
 
 	ext2_debug ("goal=%lu.\n", goal);
 
@@ -396,8 +397,10 @@ int ext2_new_block (struct inode * inode, unsigned long goal,
 			goto io_error;
 		group_alloc = group_reserve_blocks(desc, gdp_bh, es_alloc);
 	}
-	if (bit >= sbi->s_groups_count)
+	if (bit >= sbi->s_groups_count) {
+		*err = -ENOSPC;
 		goto out_release;
+	}
 	brelse(bitmap_bh);
 	bitmap_bh = read_block_bitmap(sb, group_no);
 	if (!bitmap_bh)
@@ -409,7 +412,7 @@ int ext2_new_block (struct inode * inode, unsigned long goal,
 			"Free blocks count corrupted for block group %d",
 				group_no);
 		group_alloc = 0;
-		goto out_release;
+		goto io_error;
 	}
 
 got_block:
@@ -432,7 +435,7 @@ int ext2_new_block (struct inode * inode, unsigned long goal,
 			    "block(%d) >= blocks count(%d) - "
 			    "block_group = %d, es == %p ", ret_block,
 			le32_to_cpu(es->s_blocks_count), group_no, es);
-		goto out_release;
+		goto io_error;
 	}
 	block = target_block;
 
@@ -470,10 +473,10 @@ int ext2_new_block (struct inode * inode, unsigned long goal,
 
 	ext2_debug ("allocating block %d. ", block);
 
+	*err = 0;
 out_release:
 	group_release_blocks(desc, gdp_bh, group_alloc);
 	release_blocks(sb, es_alloc);
-	*err = 0;
 out_unlock:
 	unlock_super (sb);
 	DQUOT_FREE_BLOCK(inode, dq_alloc);

fs/ext2/inode.c

@@ -1239,6 +1239,12 @@ int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
 	error = inode_change_ok(inode, iattr);
 	if (error)
 		return error;
+	if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
+	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
+		error = DQUOT_TRANSFER(inode, iattr) ? -EDQUOT : 0;
+		if (error)
+			return error;
+	}
 	inode_setattr(inode, iattr);
 	if (iattr->ia_valid & ATTR_MODE)
 		error = ext2_acl_chmod(inode);

fs/fs-writeback.c

@@ -67,6 +67,7 @@ void __mark_inode_dirty(struct inode *inode, int flags)
 
 	spin_lock(&inode_lock);
 	if ((inode->i_state & flags) != flags) {
+		const int was_dirty = inode->i_state & I_DIRTY;
 		struct address_space *mapping = inode->i_mapping;
 
 		inode->i_state |= flags;
@@ -90,7 +91,7 @@ void __mark_inode_dirty(struct inode *inode, int flags)
 		 * If the inode was already on s_dirty or s_io, don't
 		 * reposition it (that would break s_dirty time-ordering).
 		 */
-		if (!mapping->dirtied_when) {
+		if (!was_dirty) {
 			mapping->dirtied_when = jiffies|1; /* 0 is special */
 			list_move(&inode->i_list, &sb->s_dirty);
 		}
@@ -280,7 +281,7 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
 		__iget(inode);
 		__writeback_single_inode(inode, really_sync, wbc);
 		if (wbc->sync_mode == WB_SYNC_HOLD) {
-			mapping->dirtied_when = jiffies;
+			mapping->dirtied_when = jiffies|1;
 			list_move(&inode->i_list, &sb->s_dirty);
 		}
 		if (current_is_pdflush())

fs/inode.c

@@ -176,6 +176,7 @@ void inode_init_once(struct inode *inode)
 	spin_lock_init(&inode->i_data.private_lock);
 	INIT_LIST_HEAD(&inode->i_data.i_mmap);
 	INIT_LIST_HEAD(&inode->i_data.i_mmap_shared);
+	spin_lock_init(&inode->i_lock);
 }
 
 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)

fs/jbd/transaction.c

@@ -689,11 +689,14 @@ do_get_write_access(handle_t *handle, struct journal_head *jh, int force_copy)
 		 * disk then we cannot do copy-out here. */
 
 		if (jh->b_jlist == BJ_Shadow) {
+			wait_queue_head_t *wqh;
+
 			JBUFFER_TRACE(jh, "on shadow: sleep");
 			spin_unlock(&journal_datalist_lock);
 			unlock_journal(journal);
 			/* commit wakes up all shadow buffers after IO */
-			sleep_on_buffer(jh2bh(jh));
+			wqh = bh_waitq_head(jh2bh(jh));
+			wait_event(*wqh, (jh->b_jlist != BJ_Shadow));
 			lock_journal(journal);
 			goto repeat;
 		}

fs/quota.c

@@ -123,13 +123,13 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, cadd
 		case Q_GETFMT: {
 			__u32 fmt;
 
-			down_read(&sb_dqopt(sb)->dqoff_sem);
+			down_read(&sb_dqopt(sb)->dqptr_sem);
 			if (!sb_has_quota_enabled(sb, type)) {
-				up_read(&sb_dqopt(sb)->dqoff_sem);
+				up_read(&sb_dqopt(sb)->dqptr_sem);
 				return -ESRCH;
 			}
 			fmt = sb_dqopt(sb)->info[type].dqi_format->qf_fmt_id;
-			up_read(&sb_dqopt(sb)->dqoff_sem);
+			up_read(&sb_dqopt(sb)->dqptr_sem);
 			if (copy_to_user(addr, &fmt, sizeof(fmt)))
 				return -EFAULT;
 			return 0;

fs/stat.c

@@ -316,3 +316,45 @@ asmlinkage long sys_fstat64(unsigned long fd, struct stat64 * statbuf, long flag
 }
 
 #endif /* LFS-64 */
+
+void inode_add_bytes(struct inode *inode, loff_t bytes)
+{
+	spin_lock(&inode->i_lock);
+	inode->i_blocks += bytes >> 9;
+	bytes &= 511;
+	inode->i_bytes += bytes;
+	if (inode->i_bytes >= 512) {
+		inode->i_blocks++;
+		inode->i_bytes -= 512;
+	}
+	spin_unlock(&inode->i_lock);
+}
+
+void inode_sub_bytes(struct inode *inode, loff_t bytes)
+{
+	spin_lock(&inode->i_lock);
+	inode->i_blocks -= bytes >> 9;
+	bytes &= 511;
+	if (inode->i_bytes < bytes) {
+		inode->i_blocks--;
+		inode->i_bytes += 512;
+	}
+	inode->i_bytes -= bytes;
+	spin_unlock(&inode->i_lock);
+}
+
+loff_t inode_get_bytes(struct inode *inode)
+{
+	loff_t ret;
+
+	spin_lock(&inode->i_lock);
+	ret = (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
+	spin_unlock(&inode->i_lock);
+	return ret;
+}
+
+void inode_set_bytes(struct inode *inode, loff_t bytes)
+{
+	inode->i_blocks = bytes >> 9;
+	inode->i_bytes = bytes & 511;
+}

fs/super.c

@@ -71,7 +71,8 @@ static struct super_block *alloc_super(void)
 		atomic_set(&s->s_active, 1);
 		sema_init(&s->s_vfs_rename_sem,1);
 		sema_init(&s->s_dquot.dqio_sem, 1);
-		init_rwsem(&s->s_dquot.dqoff_sem);
+		sema_init(&s->s_dquot.dqonoff_sem, 1);
+		init_rwsem(&s->s_dquot.dqptr_sem);
 		s->s_maxbytes = MAX_NON_LFS;
 		s->dq_op = sb_dquot_ops;
 		s->s_qcop = sb_quotactl_ops;
@@ -310,7 +311,7 @@ void sync_filesystems(int wait)
 	spin_lock(&sb_lock);
 	for (sb = sb_entry(super_blocks.next); sb != sb_entry(&super_blocks);
 			sb = sb_entry(sb->s_list.next)) {
-		if (!sb->s_op->sync_fs);
+		if (!sb->s_op->sync_fs)
 			continue;
 		if (sb->s_flags & MS_RDONLY)
 			continue;

include/asm-generic/vmlinux.lds.h

@@ -13,18 +13,18 @@
 	}								\
 									\
 	/* Kernel symbol table: Normal symbols */			\
-	__start___ksymtab = .;						\
 	__ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {		\
+		__start___ksymtab = .;					\
 		*(__ksymtab)						\
+		__stop___ksymtab = .;					\
 	}								\
-	__stop___ksymtab = .;						\
 									\
 	/* Kernel symbol table: GPL-only symbols */			\
-	__start___gpl_ksymtab = .;					\
 	__gpl_ksymtab     : AT(ADDR(__gpl_ksymtab) - LOAD_OFFSET) {	\
+		__start___gpl_ksymtab = .;				\
 		*(__gpl_ksymtab)					\
+		__stop___gpl_ksymtab = .;				\
 	}								\
-	__stop___gpl_ksymtab = .;					\
 									\
 	/* Kernel symbol table: strings */				\
         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {	\

include/asm-i386/pgtable-3level.h

@@ -89,8 +89,17 @@ static inline int pte_same(pte_t a, pte_t b)
 }
 
 #define pte_page(x)	pfn_to_page(pte_pfn(x))
-#define pte_none(x)	(!(x).pte_low && !(x).pte_high)
-#define pte_pfn(x)	(((x).pte_low >> PAGE_SHIFT) | ((x).pte_high << (32 - PAGE_SHIFT)))
+
+static inline int pte_none(pte_t pte)
+{
+	return !pte.pte_low && !pte.pte_high;
+}
+
+static inline unsigned long pte_pfn(pte_t pte)
+{
+	return (pte.pte_low >> PAGE_SHIFT) |
+		(pte.pte_high << (32 - PAGE_SHIFT));
+}
 
 static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
 {

include/asm-i386/pgtable.h

@@ -242,7 +242,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 	((pmd_val(pmd) & (_PAGE_PSE|_PAGE_PRESENT)) == (_PAGE_PSE|_PAGE_PRESENT))
 
 /* to find an entry in a page-table-directory. */
-#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
 
 #define __pgd_offset(address) pgd_index(address)
 

include/linux/blkdev.h

@@ -287,8 +287,8 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn;
  * BLK_BOUNCE_ANY	: don't bounce anything
  * BLK_BOUNCE_ISA	: bounce pages above ISA DMA boundary
  */
-#define BLK_BOUNCE_HIGH		(blk_max_low_pfn << PAGE_SHIFT)
-#define BLK_BOUNCE_ANY		(blk_max_pfn << PAGE_SHIFT)
+#define BLK_BOUNCE_HIGH		((u64)blk_max_low_pfn << PAGE_SHIFT)
+#define BLK_BOUNCE_ANY		((u64)blk_max_pfn << PAGE_SHIFT)
 #define BLK_BOUNCE_ISA		(ISA_DMA_THRESHOLD)
 
 extern int init_emergency_isa_pool(void);

include/linux/buffer_head.h

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/fs.h>
 #include <linux/linkage.h>
+#include <linux/wait.h>
 #include <asm/atomic.h>
 
 enum bh_state_bits {
@@ -154,7 +155,7 @@ void invalidate_bdev(struct block_device *, int);
 void __invalidate_buffers(kdev_t dev, int);
 int sync_blockdev(struct block_device *bdev);
 void __wait_on_buffer(struct buffer_head *);
-void sleep_on_buffer(struct buffer_head *bh);
+wait_queue_head_t *bh_waitq_head(struct buffer_head *bh);
 void wake_up_buffer(struct buffer_head *bh);
 int fsync_bdev(struct block_device *);
 int fsync_super(struct super_block *);

include/linux/fs.h

@@ -371,9 +371,10 @@ struct inode {
 	struct timespec		i_ctime;
 	unsigned int		i_blkbits;
 	unsigned long		i_blksize;
-	unsigned long		i_blocks;
 	unsigned long		i_version;
+	unsigned long		i_blocks;
 	unsigned short          i_bytes;
+	spinlock_t		i_lock;	/* i_blocks, i_bytes, maybe i_size */
 	struct semaphore	i_sem;
 	struct inode_operations	*i_op;
 	struct file_operations	*i_fop;	/* former ->i_op->default_file_ops */
@@ -400,7 +401,7 @@ struct inode {
 	void			*i_security;
 	__u32			i_generation;
 	union {
-		void				*generic_ip;
+		void		*generic_ip;
 	} u;
 };
 
@@ -412,39 +413,6 @@ struct fown_struct {
 	void *security;
 };
 
-static inline void inode_add_bytes(struct inode *inode, loff_t bytes)
-{
-	inode->i_blocks += bytes >> 9;
-	bytes &= 511;
-	inode->i_bytes += bytes;
-	if (inode->i_bytes >= 512) {
-		inode->i_blocks++;
-		inode->i_bytes -= 512;
-	}
-}
-
-static inline void inode_sub_bytes(struct inode *inode, loff_t bytes)
-{
-	inode->i_blocks -= bytes >> 9;
-	bytes &= 511;
-	if (inode->i_bytes < bytes) {
-		inode->i_blocks--;
-		inode->i_bytes += 512;
-	}
-	inode->i_bytes -= bytes;
-}
-
-static inline loff_t inode_get_bytes(struct inode *inode)
-{
-	return (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
-}
-
-static inline void inode_set_bytes(struct inode *inode, loff_t bytes)
-{
-	inode->i_blocks = bytes >> 9;
-	inode->i_bytes = bytes & 511;
-}
-
 /*
  * Track a single file's readahead state
  */
@@ -1277,6 +1245,10 @@ extern int page_symlink(struct inode *inode, const char *symname, int len);
 extern struct inode_operations page_symlink_inode_operations;
 extern void generic_fillattr(struct inode *, struct kstat *);
 extern int vfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+void inode_add_bytes(struct inode *inode, loff_t bytes);
+void inode_sub_bytes(struct inode *inode, loff_t bytes);
+loff_t inode_get_bytes(struct inode *inode);
+void inode_set_bytes(struct inode *inode, loff_t bytes);
 
 extern int vfs_readdir(struct file *, filldir_t, void *);
 

include/linux/module.h

@@ -344,7 +344,7 @@ static inline int module_text_address(unsigned long addr)
 }
 
 /* Get/put a kernel symbol (calls should be symmetric) */
-#define symbol_get(x) (&(x))
+#define symbol_get(x) ({ extern typeof(x) x __attribute__((weak)); &(x); })
 #define symbol_put(x) do { } while(0)
 #define symbol_put_addr(x) do { } while(0)
 

include/linux/quota.h

@@ -280,7 +280,8 @@ struct quota_format_type {
 struct quota_info {
 	unsigned int flags;			/* Flags for diskquotas on this device */
 	struct semaphore dqio_sem;		/* lock device while I/O in progress */
-	struct rw_semaphore dqoff_sem;		/* serialize quota_off() and quota_on() on device and ops using quota_info struct, pointers from inode to dquots */
+	struct semaphore dqonoff_sem;		/* Serialize quotaon & quotaoff */
+	struct rw_semaphore dqptr_sem;		/* serialize ops using quota_info struct, pointers from inode to dquots */
 	struct file *files[MAXQUOTAS];		/* fp's to quotafiles */
 	struct mem_dqinfo info[MAXQUOTAS];	/* Information for each quota type */
 	struct quota_format_ops *ops[MAXQUOTAS];	/* Operations for each type */

kernel/ksyms.c

@@ -272,6 +272,10 @@ EXPORT_SYMBOL(vfs_fstat);
 EXPORT_SYMBOL(vfs_stat);
 EXPORT_SYMBOL(vfs_lstat);
 EXPORT_SYMBOL(vfs_getattr);
+EXPORT_SYMBOL(inode_add_bytes);
+EXPORT_SYMBOL(inode_sub_bytes);
+EXPORT_SYMBOL(inode_get_bytes);
+EXPORT_SYMBOL(inode_set_bytes);
 EXPORT_SYMBOL(lock_rename);
 EXPORT_SYMBOL(unlock_rename);
 EXPORT_SYMBOL(generic_read_dir);

kernel/params.c

@@ -27,6 +27,22 @@
 #define DEBUGP(fmt, a...)
 #endif
 
+static inline int dash2underscore(char c)
+{
+	if (c == '-')
+		return '_';
+	return c;
+}
+
+static inline int parameq(const char *input, const char *paramname)
+{
+	unsigned int i;
+	for (i = 0; dash2underscore(input[i]) == paramname[i]; i++)
+		if (input[i] == '\0')
+			return 1;
+	return 0;
+}
+
 static int parse_one(char *param,
 		     char *val,
 		     struct kernel_param *params, 
@@ -37,7 +53,7 @@ static int parse_one(char *param,
 
 	/* Find parameter */
 	for (i = 0; i < num_params; i++) {
-		if (strcmp(param, params[i].name) == 0) {
+		if (parameq(param, params[i].name)) {
 			DEBUGP("They are equal!  Calling %p\n",
 			       params[i].set);
 			return params[i].set(val, &params[i]);
@@ -69,8 +85,6 @@ static char *next_arg(char *args, char **param, char **val)
 		if (equals == 0) {
 			if (args[i] == '=')
 				equals = i;
-			else if (args[i] == '-')
-				args[i] = '_';
 		}
 		if (args[i] == '"')
 			in_quote = !in_quote;

kernel/sched.c

@@ -2057,7 +2057,7 @@ static void show_task(task_t * p)
 		printk(" %016lx ", thread_saved_pc(p));
 #endif
 	{
-		unsigned long * n = (unsigned long *) (p+1);
+		unsigned long * n = (unsigned long *) (p->thread_info+1);
 		while (!*n)
 			n++;
 		free = (unsigned long) n - (unsigned long)(p+1);
@@ -2465,15 +2465,12 @@ void __preempt_spin_lock(spinlock_t *lock)
 		_raw_spin_lock(lock);
 		return;
 	}
-
-	while (!_raw_spin_trylock(lock)) {
-		if (need_resched()) {
-			preempt_enable_no_resched();
-			__cond_resched();
-			preempt_disable();
-		}
-		cpu_relax();
-	}
+	do {
+		preempt_enable();
+		while (spin_is_locked(lock))
+			cpu_relax();
+		preempt_disable();
+	} while (!_raw_spin_trylock(lock));
 }
 
 void __preempt_write_lock(rwlock_t *lock)
@@ -2483,13 +2480,11 @@ void __preempt_write_lock(rwlock_t *lock)
 		return;
 	}
 
-	while (!_raw_write_trylock(lock)) {
-		if (need_resched()) {
-			preempt_enable_no_resched();
-			__cond_resched();
-			preempt_disable();
-		}
-		cpu_relax();
-	}
+	do {
+		preempt_enable();
+		while (rwlock_is_locked(lock))
+			cpu_relax();
+		preempt_disable();
+	} while (!_raw_write_trylock(lock));
 }
 #endif

mm/filemap.c

@@ -1306,11 +1306,13 @@ int generic_file_mmap(struct file * file, struct vm_area_struct * vma)
 	return 0;
 }
 
+/*
+ * This is for filesystems which do not implement ->writepage.
+ */
 int generic_file_readonly_mmap(struct file *file, struct vm_area_struct *vma)
 {
-	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_WRITE))
+	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
 		return -EINVAL;
-	vma->vm_flags &= ~VM_MAYWRITE;
 	return generic_file_mmap(file, vma);
 }
 #else

mm/mmap.c

@@ -1265,8 +1265,9 @@ void exit_mmap(struct mm_struct *mm)
 
 	tlb = tlb_gather_mmu(mm, 1);
 	flush_cache_mm(mm);
+	/* Use ~0UL here to ensure all VMAs in the mm are unmapped */
 	mm->map_count -= unmap_vmas(&tlb, mm, mm->mmap, 0,
-					TASK_SIZE, &nr_accounted);
+					~0UL, &nr_accounted);
 	vm_unacct_memory(nr_accounted);
 	BUG_ON(mm->map_count);	/* This is just debugging */
 	clear_page_tables(tlb, FIRST_USER_PGD_NR, USER_PTRS_PER_PGD);

mm/slab.c

@@ -769,7 +769,7 @@ static void poison_obj(kmem_cache_t *cachep, void *addr, unsigned char val)
 	*(unsigned char *)(addr+size-1) = POISON_END;
 }
 
-static int check_poison_obj (kmem_cache_t *cachep, void *addr)
+static void check_poison_obj(kmem_cache_t *cachep, void *addr)
 {
 	int size = cachep->objsize;
 	void *end;
@@ -779,8 +779,7 @@ static int check_poison_obj (kmem_cache_t *cachep, void *addr)
 	}
 	end = memchr(addr, POISON_END, size);
 	if (end != (addr+size-1))
-		return 1;
-	return 0;
+		slab_error(cachep, "object was modified after freeing");
 }
 #endif
 
@@ -1420,6 +1419,8 @@ static int cache_grow (kmem_cache_t * cachep, int flags)
 opps1:
 	kmem_freepages(cachep, objp);
 failed:
+	if (local_flags & __GFP_WAIT)
+		local_irq_disable();
 	return 0;
 }
 
@@ -1628,8 +1629,7 @@ cache_alloc_debugcheck_after(kmem_cache_t *cachep,
 	if (!objp)	
 		return objp;
 	if (cachep->flags & SLAB_POISON)
-		if (check_poison_obj(cachep, objp))
-			BUG();
+		check_poison_obj(cachep, objp);
 	if (cachep->flags & SLAB_RED_ZONE) {
 		/* Set alloc red-zone, and check old one. */
 		if (xchg((unsigned long *)objp, RED_ACTIVE) != RED_INACTIVE)

security/capability.c

@@ -120,17 +120,16 @@ void cap_bprm_compute_creds (struct linux_binprm *bprm)
 {
 	/* Derived from fs/exec.c:compute_creds. */
 	kernel_cap_t new_permitted, working;
-	int do_unlock = 0;
 
 	new_permitted = cap_intersect (bprm->cap_permitted, cap_bset);
 	working = cap_intersect (bprm->cap_inheritable,
 				 current->cap_inheritable);
 	new_permitted = cap_combine (new_permitted, working);
 
+	task_lock(current);
 	if (!cap_issubset (new_permitted, current->cap_permitted)) {
 		current->mm->dumpable = 0;
 
-		lock_kernel ();
 		if (must_not_trace_exec (current)
 		    || atomic_read (&current->fs->count) > 1
 		    || atomic_read (&current->files->count) > 1
@@ -141,7 +140,6 @@ void cap_bprm_compute_creds (struct linux_binprm *bprm)
 							       cap_permitted);
 			}
 		}
-		do_unlock = 1;
 	}
 
 	/* For init, we want to retain the capabilities set
@@ -154,9 +152,7 @@ void cap_bprm_compute_creds (struct linux_binprm *bprm)
 	}
 
 	/* AUD: Audit candidate if current->cap_effective is set */
-
-	if (do_unlock)
-		unlock_kernel ();
+	task_unlock(current);
 
 	current->keep_capabilities = 0;
 }

sound/oss/maestro.c

@@ -668,7 +668,7 @@ static int ac97_read_mixer(struct ess_card *card, int mixer)
 		if (mixer == SOUND_MIXER_IGAIN) {
 			right = (right * 100) / mh->scale;
 			left = (left * 100) / mh->scale;
-		else {
+		} else {
 			right = 100 - ((right * 100) / mh->scale);
 			left = 100 - ((left * 100) / mh->scale);
 		}

sound/sound_firmware.c

 #include <linux/vmalloc.h>
-#define __KERNEL_SYSCALLS__
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-#include <linux/unistd.h>
 #include <asm/uaccess.h>
 
 static int do_mod_firmware_load(const char *fn, char **fp)