From: Jiri Slaby <jslaby@suse.cz>
To: chris.mason@oracle.com
Cc: akpm@linux-foundation.org, linux-btrfs@vger.kernel.org,
linux-kernel@vger.kernel.org, jirislaby@gmail.com
Subject: [PATCH -repost#3 1/1] FS: btrfs, use helpers for rlimits
Date: Wed, 20 Oct 2010 17:00:04 +0200 [thread overview]
Message-ID: <1287586804-17498-1-git-send-email-jslaby@suse.cz> (raw)
Make sure compiler won't do weird things with limits. E.g. fetching
them twice may return 2 different values after writable limits are
implemented.
I.e. either use rlimit helpers added in
3e10e716abf3c71bdb5d86b8f507f9e72236c9cd
or ACCESS_ONCE if not applicable.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: linux-btrfs@vger.kernel.org
---
fs/btrfs/inode.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index a21625d..323c6ca 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3564,8 +3564,7 @@ static int btrfs_setattr_size(struct inode *inode, struct iattr *attr)
return 0;
if (attr->ia_size > inode->i_size) {
- unsigned long limit;
- limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
+ unsigned long limit = rlimit(RLIMIT_FSIZE);
if (attr->ia_size > inode->i_sb->s_maxbytes)
return -EFBIG;
if (limit != RLIM_INFINITY && attr->ia_size > limit) {
--
1.7.3.1
reply other threads:[~2010-10-20 15:00 UTC|newest]
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