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vsprintf: Use non-atomic bitmap API when applicable

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The 'set' bitmap is local to this function. No concurrent access to it is
possible.
So prefer the non-atomic '__[set|clear]_bit()' function to save a few
cycles.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/1abf81a5e509d372393bd22041eed4ebc07ef9f7.1638023178.git.christophe.jaillet@wanadoo.fr
This commit is contained in:
Christophe JAILLET 2021-11-27 15:27:35 +01:00 • committed by Petr Mladek
parent 7d5775d49e
commit 52e68cd60d
1 changed files with 2 additions and 2 deletions
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4
lib/vsprintf.c
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@ -3564,7 +3564,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
++fmt;
for ( ; *fmt && *fmt != ']'; ++fmt, ++len)
set_bit((u8)*fmt, set);
__set_bit((u8)*fmt, set);
/* no ']' or no character set found */
if (!*fmt || !len)
@ -3574,7 +3574,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
if (negate) {
bitmap_complement(set, set, 256);
/* exclude null '\0' byte */
clear_bit(0, set);
__clear_bit(0, set);
}
/* match must be non-empty */