From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxxx
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig | 2
lib/Makefile | 1
lib/string.c | 141 --------------------------------------------
lib/test_string.c | 141 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 143 insertions(+), 142 deletions(-)
diff -puN lib/Kconfig~lib-add-module-support-to-string-tests lib/Kconfig
--- a/lib/Kconfig~lib-add-module-support-to-string-tests
+++ a/lib/Kconfig
@@ -584,7 +584,7 @@ config PRIME_NUMBERS
tristate
config STRING_SELFTEST
- bool "Test string functions"
+ tristate "Test string functions"
endmenu
diff -puN lib/Makefile~lib-add-module-support-to-string-tests lib/Makefile
--- a/lib/Makefile~lib-add-module-support-to-string-tests
+++ a/lib/Makefile
@@ -40,6 +40,7 @@ obj-y += bcd.o div64.o sort.o parser.o d
bsearch.o find_bit.o llist.o memweight.o kfifo.o \
percpu-refcount.o percpu_ida.o rhashtable.o reciprocal_div.o \
once.o refcount.o usercopy.o errseq.o
+obj-$(CONFIG_STRING_SELFTEST) += test_string.o
obj-y += string_helpers.o
obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
obj-y += hexdump.o
diff -puN lib/string.c~lib-add-module-support-to-string-tests lib/string.c
--- a/lib/string.c~lib-add-module-support-to-string-tests
+++ a/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 */
diff -puN /dev/null lib/test_string.c
--- /dev/null
+++ a/lib/test_string.c
@@ -0,0 +1,141 @@
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/string.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);
+MODULE_LICENSE("GPL v2");
_
--
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