mm: add arch-independent testcases for RODATA
This patch makes arch-independent testcases for RODATA. Both x86 and
x86_64 already have testcases for RODATA, But they are arch-specific
because using inline assembly directly.
And cacheflush.h is not a suitable location for rodata-test related
things. Since they were in cacheflush.h, If someone change the state of
CONFIG_DEBUG_RODATA_TEST, It cause overhead of kernel build.
To solve the above issues, write arch-independent testcases and move it
to shared location.
[jinb.park7@gmail.com: fix config dependency]
Link: http://lkml.kernel.org/r/20170209131625.GA16954@pjb1027-Latitude-E5410
Link: http://lkml.kernel.org/r/20170129105436.GA9303@pjb1027-Latitude-E5410
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/init/main.c b/init/main.c
index 6eb10ce..47ea22d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -82,6 +82,7 @@
#include <linux/proc_ns.h>
#include <linux/io.h>
#include <linux/cache.h>
+#include <linux/rodata_test.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -935,9 +936,10 @@
#ifdef CONFIG_STRICT_KERNEL_RWX
static void mark_readonly(void)
{
- if (rodata_enabled)
+ if (rodata_enabled) {
mark_rodata_ro();
- else
+ rodata_test();
+ } else
pr_info("Kernel memory protection disabled.\n");
}
#else