summaryrefslogtreecommitdiffstats
path: root/lib/string.c
diff options
context:
space:
mode:
authorGeert Uytterhoeven <geert@linux-m68k.org>2017-11-17 15:27:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 16:10:01 -0800
commitd6b28e0996962aeadd3777ae565ae03dd5c59f18 (patch)
tree83cde532b1500223778ddebbb84447418a140c3b /lib/string.c
parentf5bba9d11a256ad2a1c2f8e7fc6aabe6416b7890 (diff)
downloadlinux-d6b28e0996962aeadd3777ae565ae03dd5c59f18.tar.gz
linux-d6b28e0996962aeadd3777ae565ae03dd5c59f18.tar.bz2
linux-d6b28e0996962aeadd3777ae565ae03dd5c59f18.zip
lib: add module support to string tests
Extract the string test code into its own source file, to allow compiling it either to a loadable module, or built into the kernel. Fixes: 03270c13c5ffaa6a ("lib/string.c: add testcases for memset16/32/64") Link: http://lkml.kernel.org/r/1505397744-3387-1-git-send-email-geert@linux-m68k.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/string.c')
-rw-r--r--lib/string.c141
1 files changed, 0 insertions, 141 deletions
diff --git a/lib/string.c b/lib/string.c
index 5e8d410a93df..64a9e33f1daa 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -1052,144 +1052,3 @@ void fortify_panic(const char *name)
BUG();
}
EXPORT_SYMBOL(fortify_panic);
-
-#ifdef CONFIG_STRING_SELFTEST
-#include <linux/slab.h>
-#include <linux/module.h>
-
-static __init int memset16_selftest(void)
-{
- unsigned i, j, k;
- u16 v, *p;
-
- p = kmalloc(256 * 2 * 2, GFP_KERNEL);
- if (!p)
- return -1;
-
- for (i = 0; i < 256; i++) {
- for (j = 0; j < 256; j++) {
- memset(p, 0xa1, 256 * 2 * sizeof(v));
- memset16(p + i, 0xb1b2, j);
- for (k = 0; k < 512; k++) {
- v = p[k];
- if (k < i) {
- if (v != 0xa1a1)
- goto fail;
- } else if (k < i + j) {
- if (v != 0xb1b2)
- goto fail;
- } else {
- if (v != 0xa1a1)
- goto fail;
- }
- }
- }
- }
-
-fail:
- kfree(p);
- if (i < 256)
- return (i << 24) | (j << 16) | k;
- return 0;
-}
-
-static __init int memset32_selftest(void)
-{
- unsigned i, j, k;
- u32 v, *p;
-
- p = kmalloc(256 * 2 * 4, GFP_KERNEL);
- if (!p)
- return -1;
-
- for (i = 0; i < 256; i++) {
- for (j = 0; j < 256; j++) {
- memset(p, 0xa1, 256 * 2 * sizeof(v));
- memset32(p + i, 0xb1b2b3b4, j);
- for (k = 0; k < 512; k++) {
- v = p[k];
- if (k < i) {
- if (v != 0xa1a1a1a1)
- goto fail;
- } else if (k < i + j) {
- if (v != 0xb1b2b3b4)
- goto fail;
- } else {
- if (v != 0xa1a1a1a1)
- goto fail;
- }
- }
- }
- }
-
-fail:
- kfree(p);
- if (i < 256)
- return (i << 24) | (j << 16) | k;
- return 0;
-}
-
-static __init int memset64_selftest(void)
-{
- unsigned i, j, k;
- u64 v, *p;
-
- p = kmalloc(256 * 2 * 8, GFP_KERNEL);
- if (!p)
- return -1;
-
- for (i = 0; i < 256; i++) {
- for (j = 0; j < 256; j++) {
- memset(p, 0xa1, 256 * 2 * sizeof(v));
- memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j);
- for (k = 0; k < 512; k++) {
- v = p[k];
- if (k < i) {
- if (v != 0xa1a1a1a1a1a1a1a1ULL)
- goto fail;
- } else if (k < i + j) {
- if (v != 0xb1b2b3b4b5b6b7b8ULL)
- goto fail;
- } else {
- if (v != 0xa1a1a1a1a1a1a1a1ULL)
- goto fail;
- }
- }
- }
- }
-
-fail:
- kfree(p);
- if (i < 256)
- return (i << 24) | (j << 16) | k;
- return 0;
-}
-
-static __init int string_selftest_init(void)
-{
- int test, subtest;
-
- test = 1;
- subtest = memset16_selftest();
- if (subtest)
- goto fail;
-
- test = 2;
- subtest = memset32_selftest();
- if (subtest)
- goto fail;
-
- test = 3;
- subtest = memset64_selftest();
- if (subtest)
- goto fail;
-
- pr_info("String selftests succeeded\n");
- return 0;
-fail:
- pr_crit("String selftest failure %d.%08x\n", test, subtest);
- return 0;
-}
-
-module_init(string_selftest_init);
-#endif /* CONFIG_STRING_SELFTEST */