[PATCH v19 10/24] selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random
From: Sandipan Das <hidden>
Date: 2020-03-31 09:59:11
Also in:
linux-arch, linux-kselftest, linux-mm
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Linus Torvalds
From: Ram Pai <redacted> alloc_random_pkey() was allocating the same pkey every time. Not all pkeys were geting tested. This fixes it. cc: Dave Hansen <redacted> cc: Florian Weimer <redacted> Signed-off-by: Ram Pai <redacted> Acked-by: Dave Hansen <redacted> Signed-off-by: Sandipan Das <redacted> --- tools/testing/selftests/vm/protection_keys.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
index 7fd52d5c4bfdd..9cc82b65f8281 100644
--- a/tools/testing/selftests/vm/protection_keys.c
+++ b/tools/testing/selftests/vm/protection_keys.c@@ -25,6 +25,7 @@ #define __SANE_USERSPACE_TYPES__ #include <errno.h> #include <linux/futex.h> +#include <time.h> #include <sys/time.h> #include <sys/syscall.h> #include <string.h>
@@ -546,10 +547,10 @@ int alloc_random_pkey(void) int nr_alloced = 0; int random_index; memset(alloced_pkeys, 0, sizeof(alloced_pkeys)); + srand((unsigned int)time(NULL)); /* allocate every possible key and make a note of which ones we got */ max_nr_pkey_allocs = NR_PKEYS; - max_nr_pkey_allocs = 1; for (i = 0; i < max_nr_pkey_allocs; i++) { int new_pkey = alloc_pkey(); if (new_pkey < 0)
--
2.17.1