lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ntfs: use zero_user_page

Browse Source 
Use zero_user_page() instead of open-coding it.

[akpm@linux-foundation.org: kmap-type fixes]
Signed-off-by: Nate Diller <nate.diller@gmail.com>
Acked-by: Anton Altaparmakov <aia21@cantab.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nate Diller
2007-05-12 10:36:54 -07:00
committed by Linus Torvalds
parent 6d690dcac9
commit e3bf460f3e
2 changed files with 26 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
fs/ntfs/aops.c
View File

@ -86,19 +86,15 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate)
}
/* Check for the current buffer head overflowing. */
if (unlikely(file_ofs + bh->b_size > init_size)) {
u8 *kaddr;
int ofs;
ofs = 0;
if (file_ofs < init_size)
ofs = init_size - file_ofs;
local_irq_save(flags);
kaddr = kmap_atomic(page, KM_BIO_SRC_IRQ);
memset(kaddr + bh_offset(bh) + ofs, 0,
bh->b_size - ofs);
kunmap_atomic(kaddr, KM_BIO_SRC_IRQ);
zero_user_page(page, bh_offset(bh) + ofs,
bh->b_size - ofs, KM_BIO_SRC_IRQ);
local_irq_restore(flags);
flush_dcache_page(page);
}
} else {
clear_buffer_uptodate(bh);
@ -245,8 +241,7 @@ static int ntfs_read_block(struct page *page)
rl = NULL;
nr = i = 0;
do {
u8 *kaddr;
int err;
int err = 0;
if (unlikely(buffer_uptodate(bh)))
continue;
@ -254,7 +249,6 @@ static int ntfs_read_block(struct page *page)
arr[nr++] = bh;
continue;
}
err = 0;
bh->b_bdev = vol->sb->s_bdev;
/* Is the block within the allowed limits? */
if (iblock < lblock) {
@ -340,10 +334,7 @@ handle_hole:
bh->b_blocknr = -1UL;
clear_buffer_mapped(bh);
handle_zblock:
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr + i * blocksize, 0, blocksize);
kunmap_atomic(kaddr, KM_USER0);
flush_dcache_page(page);
zero_user_page(page, i * blocksize, blocksize, KM_USER0);
if (likely(!err))
set_buffer_uptodate(bh);
} while (i++, iblock++, (bh = bh->b_this_page) != head);
@ -460,10 +451,7 @@ retry_readpage:
* ok to ignore the compressed flag here.
*/
if (unlikely(page->index > 0)) {
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr, 0, PAGE_CACHE_SIZE);
flush_dcache_page(page);
kunmap_atomic(kaddr, KM_USER0);
zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
goto done;
}
if (!NInoAttr(ni))
@ -790,14 +778,10 @@ lock_retry_remap:
* uptodate so it can get discarded by the VM.
*/
if (err == -ENOENT || lcn == LCN_ENOENT) {
u8 *kaddr;
bh->b_blocknr = -1;
clear_buffer_dirty(bh);
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr + bh_offset(bh), 0, blocksize);
kunmap_atomic(kaddr, KM_USER0);
flush_dcache_page(page);
zero_user_page(page, bh_offset(bh), blocksize,
KM_USER0);
set_buffer_uptodate(bh);
err = 0;
continue;
@ -1422,10 +1406,8 @@ retry_writepage:
if (page->index >= (i_size >> PAGE_CACHE_SHIFT)) {
/* The page straddles i_size. */
unsigned int ofs = i_size & ~PAGE_CACHE_MASK;
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr + ofs, 0, PAGE_CACHE_SIZE - ofs);
kunmap_atomic(kaddr, KM_USER0);
flush_dcache_page(page);
zero_user_page(page, ofs, PAGE_CACHE_SIZE - ofs,
KM_USER0);
}
/* Handle mst protected attributes. */
if (NInoMstProtected(ni))