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authorChristoph Hellwig <hch@infradead.org>2008-12-17 12:27:36 -0500
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-12-22 18:02:01 +1100
commitefc557570dc99b46e46a7be51c3c7402b485e829 (patch)
treefaba8c63e6bcf798ab76f7da1fcb035ece445700 /fs/xfs/xfs_error.h
parent9f6c92b9cc2fd41d6c7b493be5637cc5b5659880 (diff)
downloadblackbird-op-linux-efc557570dc99b46e46a7be51c3c7402b485e829.tar.gz
blackbird-op-linux-efc557570dc99b46e46a7be51c3c7402b485e829.zip
[XFS] avoid memory allocations in xfs_fs_vcmn_err
xfs_fs_vcmn_err can be called under a spinlock, but does a sleeping memory allocation to create buffer for it's internal sprintf. Fortunately it's the only caller of icmn_err, so we can merge the two and have one single static buffer and spinlock protecting it. While we're at it make sure we proper __attribute__ format annotations so that the compiler can detect mismatched format strings. Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_error.h')
-rw-r--r--fs/xfs/xfs_error.h12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 11543f10b0c6..0c93051c4651 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -159,11 +159,15 @@ extern int xfs_errortag_clearall(xfs_mount_t *mp, int loud);
#define XFS_PTAG_FSBLOCK_ZERO 0x00000080
struct xfs_mount;
-/* PRINTFLIKE4 */
+
+extern void xfs_fs_vcmn_err(int level, struct xfs_mount *mp,
+ char *fmt, va_list ap)
+ __attribute__ ((format (printf, 3, 0)));
extern void xfs_cmn_err(int panic_tag, int level, struct xfs_mount *mp,
- char *fmt, ...);
-/* PRINTFLIKE3 */
-extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...);
+ char *fmt, ...)
+ __attribute__ ((format (printf, 4, 5)));
+extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...)
+ __attribute__ ((format (printf, 3, 4)));
extern void xfs_hex_dump(void *p, int length);
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