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| author | Christoph Hellwig <hch@infradead.org> | 2008-12-17 12:27:36 -0500 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-12-22 18:02:01 +1100 |
| commit | efc557570dc99b46e46a7be51c3c7402b485e829 (patch) | |
| tree | faba8c63e6bcf798ab76f7da1fcb035ece445700 /fs/xfs/xfs_error.h | |
| parent | 9f6c92b9cc2fd41d6c7b493be5637cc5b5659880 (diff) | |
| download | blackbird-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.h | 12 |
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); |
