Commit 52e68cd6 authored by Christophe JAILLET's avatar Christophe JAILLET Committed by Petr Mladek
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vsprintf: Use non-atomic bitmap API when applicable 



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: default avatarChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/1abf81a5e509d372393bd22041eed4ebc07ef9f7.1638023178.git.christophe.jaillet@wanadoo.fr
parent 7d5775d4

lib/vsprintf.c

+2 −2
Original line number Diff line number Diff line
@@ -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 */