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btrfs: better handle btrfs_printk() defaults

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Commit 262c5e86fe ("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>
This commit is contained in:
Petr Mladek 2016-12-14 15:04:01 -08:00 committed by Linus Torvalds
parent 775a2e29c3
commit 40f7828b36
1 changed files with 3 additions and 9 deletions
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12
fs/btrfs/super.c
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@ -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;