The patch titled
libfs: remove page up-to-date check from simple_readpage
has been added to the -mm tree. Its filename is
libfs-remove-page-up-to-date-check-from-simple_readpage.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: libfs: remove page up-to-date check from simple_readpage
From: Pekka J Enberg <penberg@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/libfs.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff -puN fs/libfs.c~libfs-remove-page-up-to-date-check-from-simple_readpage fs/libfs.c
--- a/fs/libfs.c~libfs-remove-page-up-to-date-check-from-simple_readpage
+++ a/fs/libfs.c
@@ -317,17 +317,9 @@ int simple_rename(struct inode *old_dir,
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;
}
_
Patches currently in -mm which might be from penberg@xxxxxxxxxxxxxx are
msi-use-kmem_cache_zalloc.patch
libfs-remove-page-up-to-date-check-from-simple_readpage.patch
-
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