mister-devel/Linux-Kernel_MiSTer
1
0
Fork 0
mirror of https://github.com/MiSTer-devel/Linux-Kernel_MiSTer.git synced 2026-04-19 03:04:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

v5.15.1

Browse Source
This commit is contained in:
Sorgelig
2021-11-07 20:12:39 +08:00
parent b6f2ca1c4d
commit aba1ef4c11
10610 changed files with 600603 additions and 270114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
lib/string.c
View File

@@ -29,6 +29,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
#include <asm/word-at-a-time.h>
#include <asm/page.h>
@@ -935,6 +936,21 @@ __visible int memcmp(const void *cs, const void *ct, size_t count)
const unsigned char *su1, *su2;
int res = 0;
#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
if (count >= sizeof(unsigned long)) {
const unsigned long *u1 = cs;
const unsigned long *u2 = ct;
do {
if (get_unaligned(u1) != get_unaligned(u2))
break;
u1++;
u2++;
count -= sizeof(unsigned long);
} while (count >= sizeof(unsigned long));
cs = u1;
ct = u2;
}
#endif
for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
if ((res = *su1 - *su2) != 0)
break;