Merge branch 'master' of /home/src/linux-2.6/

6 files changed, 43 insertions, 56 deletions

diff --git a/fs/aio.c b/fs/aio.c
index 38f6268..0e11e31 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -562,6 +562,7 @@ static inline void lock_kiocb(struct kiocb *iocb)
 static inline void unlock_kiocb(struct kiocb *iocb)
 {
 	kiocbClearLocked(iocb);
+	smp_mb__after_clear_bit();
 	wake_up_bit(&iocb->ki_flags, KIF_LOCKED);
 }
 
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 6ab1dd0..403b90a 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -231,8 +231,9 @@ struct ep_pqueue {
 
 static void ep_poll_safewake_init(struct poll_safewake *psw);
 static void ep_poll_safewake(struct poll_safewake *psw, wait_queue_head_t *wq);
-static int ep_getfd(int *efd, struct inode **einode, struct file **efile);
-static int ep_file_init(struct file *file);
+static int ep_getfd(int *efd, struct inode **einode, struct file **efile,
+		    struct eventpoll *ep);
+static int ep_alloc(struct eventpoll **pep);
 static void ep_free(struct eventpoll *ep);
 static struct epitem *ep_find(struct eventpoll *ep, struct file *file, int fd);
 static void ep_use_epitem(struct epitem *epi);
@@ -501,38 +502,37 @@ void eventpoll_release_file(struct file *file)
 asmlinkage long sys_epoll_create(int size)
 {
 	int error, fd;
+	struct eventpoll *ep;
 	struct inode *inode;
 	struct file *file;
 
 	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
 		     current, size));
 
-	/* Sanity check on the size parameter */
+	/*
+	 * Sanity check on the size parameter, and create the internal data
+	 * structure ( "struct eventpoll" ).
+	 */
 	error = -EINVAL;
-	if (size <= 0)
+	if (size <= 0 || (error = ep_alloc(&ep)) != 0)
 		goto eexit_1;
 
 	/*
 	 * Creates all the items needed to setup an eventpoll file. That is,
 	 * a file structure, and inode and a free file descriptor.
 	 */
-	error = ep_getfd(&fd, &inode, &file);
-	if (error)
-		goto eexit_1;
-
-	/* Setup the file internal data structure ( "struct eventpoll" ) */
-	error = ep_file_init(file);
+	error = ep_getfd(&fd, &inode, &file, ep);
 	if (error)
 		goto eexit_2;
 
-
 	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
 		     current, size, fd));
 
 	return fd;
 
 eexit_2:
-	sys_close(fd);
+	ep_free(ep);
+	kfree(ep);
 eexit_1:
 	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
 		     current, size, error));
@@ -706,7 +706,8 @@ eexit_1:
 /*
  * Creates the file descriptor to be used by the epoll interface.
  */
-static int ep_getfd(int *efd, struct inode **einode, struct file **efile)
+static int ep_getfd(int *efd, struct inode **einode, struct file **efile,
+		    struct eventpoll *ep)
 {
 	struct qstr this;
 	char name[32];
@@ -756,7 +757,7 @@ static int ep_getfd(int *efd, struct inode **einode, struct file **efile)
 	file->f_op = &eventpoll_fops;
 	file->f_mode = FMODE_READ;
 	file->f_version = 0;
-	file->private_data = NULL;
+	file->private_data = ep;
 
 	/* Install the new setup file into the allocated fd. */
 	fd_install(fd, file);
@@ -777,14 +778,13 @@ eexit_1:
 }
 
 
-static int ep_file_init(struct file *file)
+static int ep_alloc(struct eventpoll **pep)
 {
-	struct eventpoll *ep;
+	struct eventpoll *ep = kzalloc(sizeof(*ep), GFP_KERNEL);
 
-	if (!(ep = kmalloc(sizeof(struct eventpoll), GFP_KERNEL)))
+	if (!ep)
 		return -ENOMEM;
 
-	memset(ep, 0, sizeof(*ep));
 	rwlock_init(&ep->lock);
 	init_rwsem(&ep->sem);
 	init_waitqueue_head(&ep->wq);
@@ -792,9 +792,9 @@ static int ep_file_init(struct file *file)
 	INIT_LIST_HEAD(&ep->rdllist);
 	ep->rbr = RB_ROOT;
 
-	file->private_data = ep;
+	*pep = ep;
 
-	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: ep_file_init() ep=%p\n",
+	DNPRINTK(3, (KERN_INFO "[%p] eventpoll: ep_alloc() ep=%p\n",
 		     current, ep));
 	return 0;
 }
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 62ffa91..7134403 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -12,39 +12,6 @@
 #include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 
-static ssize_t fat_file_aio_write(struct kiocb *iocb, const char __user *buf,
-				  size_t count, loff_t pos)
-{
-	struct inode *inode = iocb->ki_filp->f_dentry->d_inode;
-	int retval;
-
-	retval = generic_file_aio_write(iocb, buf, count, pos);
-	if (retval > 0) {
-		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
-		mark_inode_dirty(inode);
-//		check the locking rules
-//		if (IS_SYNC(inode))
-//			fat_sync_inode(inode);
-	}
-	return retval;
-}
-
-static ssize_t fat_file_writev(struct file *filp, const struct iovec *iov,
-			       unsigned long nr_segs, loff_t *ppos)
-{
-	struct inode *inode = filp->f_dentry->d_inode;
-	int retval;
-
-	retval = generic_file_writev(filp, iov, nr_segs, ppos);
-	if (retval > 0) {
-		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
-		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
-		mark_inode_dirty(inode);
-	}
-	return retval;
-}
-
 int fat_generic_ioctl(struct inode *inode, struct file *filp,
 		      unsigned int cmd, unsigned long arg)
 {
@@ -148,9 +115,9 @@ struct file_operations fat_file_operations = {
 	.read		= do_sync_read,
 	.write		= do_sync_write,
 	.readv		= generic_file_readv,
-	.writev		= fat_file_writev,
+	.writev		= generic_file_writev,
 	.aio_read	= generic_file_aio_read,
-	.aio_write	= fat_file_aio_write,
+	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.ioctl		= fat_generic_ioctl,
 	.fsync		= file_fsync,
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index a7cbe68..51b1d15 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -102,6 +102,19 @@ static int fat_prepare_write(struct file *file, struct page *page,
 				  &MSDOS_I(page->mapping->host)->mmu_private);
 }
 
+static int fat_commit_write(struct file *file, struct page *page,
+			    unsigned from, unsigned to)
+{
+	struct inode *inode = page->mapping->host;
+	int err = generic_commit_write(file, page, from, to);
+	if (!err && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
+		inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
+		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
+		mark_inode_dirty(inode);
+	}
+	return err;
+}
+
 static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
 {
 	return generic_block_bmap(mapping, block, fat_get_block);
@@ -112,7 +125,7 @@ static struct address_space_operations fat_aops = {
 	.writepage	= fat_writepage,
 	.sync_page	= block_sync_page,
 	.prepare_write	= fat_prepare_write,
-	.commit_write	= generic_commit_write,
+	.commit_write	= fat_commit_write,
 	.bmap		= _fat_bmap
 };
 
diff --git a/fs/locks.c b/fs/locks.c
index c2c09b4..f7daa5f 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -124,6 +124,7 @@
 #include <linux/smp_lock.h>
 #include <linux/syscalls.h>
 #include <linux/time.h>
+#include <linux/rcupdate.h>
 
 #include <asm/semaphore.h>
 #include <asm/uaccess.h>
@@ -2205,6 +2206,7 @@ void steal_locks(fl_owner_t from)
 
 	lock_kernel();
 	j = 0;
+	rcu_read_lock();
 	fdt = files_fdtable(files);
 	for (;;) {
 		unsigned long set;
@@ -2222,6 +2224,7 @@ void steal_locks(fl_owner_t from)
 			set >>= 1;
 		}
 	}
+	rcu_read_unlock();
 	unlock_kernel();
 }
 EXPORT_SYMBOL(steal_locks);
diff --git a/fs/proc/array.c b/fs/proc/array.c
index d88d518..d84eeca 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -74,6 +74,7 @@
 #include <linux/file.h>
 #include <linux/times.h>
 #include <linux/cpuset.h>
+#include <linux/rcupdate.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -180,12 +181,14 @@ static inline char * task_state(struct task_struct *p, char *buffer)
 		p->gid, p->egid, p->sgid, p->fsgid);
 	read_unlock(&tasklist_lock);
 	task_lock(p);
+	rcu_read_lock();
 	if (p->files)
 		fdt = files_fdtable(p->files);
 	buffer += sprintf(buffer,
 		"FDSize:\t%d\n"
 		"Groups:\t",
 		fdt ? fdt->max_fds : 0);
+	rcu_read_unlock();
 
 	group_info = p->group_info;
 	get_group_info(group_info);