public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-05-14 19:53:03 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Use zero_user_page() in ext4 where possible

Browse source 
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Eric Sandeen 2007-07-18 09:20:44 -04:00 • committed by Theodore Ts'o
parent f8628a14a2
commit fc0e15a667
1 changed files with 2 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
fs/ext4/inode.c
View file

@ -1766,7 +1766,6 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
struct inode *inode = mapping->host; struct inode *inode = mapping->host;
struct buffer_head *bh; struct buffer_head *bh;
int err = 0; int err = 0;
void *kaddr;
blocksize = inode->i_sb->s_blocksize; blocksize = inode->i_sb->s_blocksize;
length = blocksize - (offset & (blocksize - 1)); length = blocksize - (offset & (blocksize - 1));
@ -1778,10 +1777,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
*/ */
if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) && if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
ext4_should_writeback_data(inode) && PageUptodate(page)) { ext4_should_writeback_data(inode) && PageUptodate(page)) {
kaddr = kmap_atomic(page, KM_USER0); zero_user_page(page, offset, length, KM_USER0);
memset(kaddr + offset, 0, length);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
set_page_dirty(page); set_page_dirty(page);
goto unlock; goto unlock;
} }
@ -1834,10 +1830,7 @@ int ext4_block_truncate_page(handle_t *handle, struct page *page,
goto unlock; goto unlock;
} }
kaddr = kmap_atomic(page, KM_USER0); zero_user_page(page, offset, length, KM_USER0);
memset(kaddr + offset, 0, length);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
BUFFER_TRACE(bh, "zeroed end of block"); BUFFER_TRACE(bh, "zeroed end of block");