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[PATCH] libfs: remove page up-to-date check from simple_readpage 

Remove the unnecessary PageUptodate check from simple_readpage.  The only
two callers for ->readpage that don't have explicit PageUptodate check are
read_cache_pages and page_cache_read which operate on newly allocated pages
which don't have the flag set.

[akpm: use the allegedly-faster clear_page(), too]
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pekka J Enberg 2006-09-29 01:59:09 -07:00 committed by Linus Torvalds
parent cfedc920a7
commit c0d92cbc58
1 changed files with 1 additions and 9 deletions
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10
fs/libfs.c
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@ -317,17 +317,9 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
int simple_readpage(struct file *file, struct page *page)
{
void *kaddr;
if (PageUptodate(page))
goto out;
kaddr = kmap_atomic(page, KM_USER0);
memset(kaddr, 0, PAGE_CACHE_SIZE);
kunmap_atomic(kaddr, KM_USER0);
clear_highpage(page);
flush_dcache_page(page);
SetPageUptodate(page);
out:
unlock_page(page);
return 0;
}