From: Rasmus Villemoes Date: Wed, 15 Apr 2015 23:17:11 +0000 (-0700) Subject: lib/vsprintf.c: another small hack X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d1c1b12137fff14363d0cf45c8b7a9ec5cd4578b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git lib/vsprintf.c: another small hack Making ZEROPAD == '0'-' ', we can eliminate a few more instructions. Signed-off-by: Rasmus Villemoes Cc: Peter Zijlstra Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 7a299d43987a..2753f9261115 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -341,10 +341,10 @@ int num_to_str(char *buf, int size, unsigned long long num) } #define SIGN 1 /* unsigned/signed, must be 1 */ -#define ZEROPAD 2 /* pad with zero */ +#define LEFT 2 /* left justified */ #define PLUS 4 /* show plus */ #define SPACE 8 /* space if plus */ -#define LEFT 16 /* left justified */ +#define ZEROPAD 16 /* pad with zero, must be 16 == '0' - ' ' */ #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ @@ -467,7 +467,8 @@ char *number(char *buf, char *end, unsigned long long num, } /* zero or space padding */ if (!(spec.flags & LEFT)) { - char c = (spec.flags & ZEROPAD) ? '0' : ' '; + char c = ' ' + (spec.flags & ZEROPAD); + BUILD_BUG_ON(' ' + ZEROPAD != '0'); while (--spec.field_width >= 0) { if (buf < end) *buf = c;