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authorPetr Mladek <pmladek@suse.com>2016-12-14 15:04:01 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-14 16:04:07 -0800
commit40f7828b36e3b9dd2fdc34d065e342cddf8d7bef (patch)
tree886d664a7ea0a22f87013bb83c4c12e51611b72e /fs/btrfs
parent775a2e29c3bbcf853432f47d3caa9ff8808807ad (diff)
downloadlinux-40f7828b36e3b9dd2fdc34d065e342cddf8d7bef.tar.bz2
btrfs: better handle btrfs_printk() defaults
Commit 262c5e86fec7 ("printk/btrfs: handle more message headers") triggers: warning: `ratelimit' may be used uninitialized in this function with gcc (4.1.2) and probably many other versions. The code actually is correct but a bit twisted. Let's make it more straightforward and set the default values at the beginning. Link: http://lkml.kernel.org/r/20161213135246.GQ3506@pathway.suse.cz Signed-off-by: Petr Mladek <pmladek@suse.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: David Sterba <dsterba@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/super.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 180f910339f4..3b713b6fcc26 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -202,12 +202,12 @@ static struct ratelimit_state printk_limits[] = {
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
- char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1];
+ char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1] = "\0";
struct va_format vaf;
va_list args;
- const char *type = NULL;
int kern_level;
- struct ratelimit_state *ratelimit;
+ const char *type = logtypes[4];
+ struct ratelimit_state *ratelimit = &printk_limits[4];
va_start(args, fmt);
@@ -223,12 +223,6 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
fmt += size;
}
- if (!type) {
- *lvl = '\0';
- type = logtypes[4];
- ratelimit = &printk_limits[4];
- }
-
vaf.fmt = fmt;
vaf.va = &args;