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[PATCH 5/9] Unionfs: clear partial read in readpage

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From: Erez Zadok <ezk@...>
To: <akpm@...>
Cc: <linux-kernel@...>, <linux-fsdevel@...>, <viro@...>, <hch@...>, Erez Zadok <ezk@...>, Hugh Dickins <hugh@...>
Subject: [PATCH 5/9] Unionfs: clear partial read in readpage
Date: Tuesday, November 13, 2007 - 6:10 am

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
 fs/unionfs/mmap.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/unionfs/mmap.c b/fs/unionfs/mmap.c
index 468dc61..bb00fd5 100644
--- a/fs/unionfs/mmap.c
+++ b/fs/unionfs/mmap.c
@@ -178,7 +178,8 @@ static int unionfs_do_readpage(struct file *file, struct page *page)
 	err = vfs_read(lower_file, page_data, PAGE_CACHE_SIZE,
 		       &lower_file->f_pos);
 	set_fs(old_fs);
-
+	if (err >= 0 && err < PAGE_CACHE_SIZE)
+		memset(page_data + err, 0, PAGE_CACHE_SIZE - err);
 	kunmap(page);
 
 	if (err < 0)
-- 
1.5.2.2

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Messages in current thread:
[GIT PULL -mm] 0/9 Unionfs updates/cleanups/fixes, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 6/9] Unionfs: debugging updates, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 4/9] Unionfs: writepage updates, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 5/9] Unionfs: clear partial read in readpage, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 9/9] Unionfs: move debugging checks inside locks, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 7/9] Unionfs: remove unnecessary lower atime updates, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 8/9] Unionfs: fold do_readpage into unionfs_readpage, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 3/9] Unionfs: update cache-coherency detection heuris..., Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 1/9] Unionfs: flush and release updates, Erez Zadok, (Tue Nov 13, 6:10 am)
[PATCH 2/9] Unionfs: use i_size wrappers, Erez Zadok, (Tue Nov 13, 6:10 am)