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-rw-r--r--fs/buffer.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 3b12cf94..5f525b3 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -218,7 +218,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
sb = get_super(bdev);
if (sb && !(sb->s_flags & MS_RDONLY)) {
sb->s_frozen = SB_FREEZE_WRITE;
- wmb();
+ smp_wmb();
sync_inodes_sb(sb, 0);
DQUOT_SYNC(sb);
@@ -235,7 +235,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
sync_inodes_sb(sb, 1);
sb->s_frozen = SB_FREEZE_TRANS;
- wmb();
+ smp_wmb();
sync_blockdev(sb->s_bdev);
@@ -263,7 +263,7 @@ void thaw_bdev(struct block_device *bdev, struct super_block *sb)
if (sb->s_op->unlockfs)
sb->s_op->unlockfs(sb);
sb->s_frozen = SB_UNFROZEN;
- wmb();
+ smp_wmb();
wake_up(&sb->s_wait_unfrozen);
drop_super(sb);
}
@@ -774,15 +774,14 @@ repeat:
/**
* sync_mapping_buffers - write out and wait upon a mapping's "associated"
* buffers
- * @buffer_mapping - the mapping which backs the buffers' data
- * @mapping - the mapping which wants those buffers written
+ * @mapping: the mapping which wants those buffers written
*
* Starts I/O against the buffers at mapping->private_list, and waits upon
* that I/O.
*
- * Basically, this is a convenience function for fsync(). @buffer_mapping is
- * the blockdev which "owns" the buffers and @mapping is a file or directory
- * which needs those buffers to be written for a successful fsync().
+ * Basically, this is a convenience function for fsync().
+ * @mapping is a file or directory which needs those buffers to be written for
+ * a successful fsync().
*/
int sync_mapping_buffers(struct address_space *mapping)
{
@@ -1263,6 +1262,7 @@ __getblk_slow(struct block_device *bdev, sector_t block, int size)
/**
* mark_buffer_dirty - mark a buffer_head as needing writeout
+ * @bh: the buffer_head to mark dirty
*
* mark_buffer_dirty() will set the dirty bit against the buffer, then set its
* backing page dirty, then tag the page as dirty in its address_space's radix
@@ -1501,6 +1501,7 @@ EXPORT_SYMBOL(__breadahead);
/**
* __bread() - reads a specified block and returns the bh
+ * @bdev: the block_device to read from
* @block: number of block
* @size: size (in bytes) to read
*
@@ -2078,8 +2079,7 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
int nr, i;
int fully_mapped = 1;
- if (!PageLocked(page))
- PAGE_BUG(page);
+ BUG_ON(!PageLocked(page));
blocksize = 1 << inode->i_blkbits;
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
@@ -2917,7 +2917,7 @@ drop_buffers(struct page *page, struct buffer_head **buffers_to_free)
bh = head;
do {
- if (buffer_write_io_error(bh))
+ if (buffer_write_io_error(bh) && page->mapping)
set_bit(AS_EIO, &page->mapping->flags);
if (buffer_busy(bh))
goto failed;
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