4.13-stable review patch. If anyone has any objections, please let me know.
------------------ From: Christophe Leroy <[email protected]> commit a872eb2131e91ce7c89a8888974a5e22a272b12f upstream. On powerpc, RODATA_TEST fails with message the following messages: Freeing unused kernel memory: 528K rodata_test: test data was not read only This is because GCC allocates it to .data section: c0695034 g O .data 00000004 rodata_test_data Since commit 056b9d8a7692 ("mm: remove rodata_test_data export, add pr_fmt"), rodata_test_data is used only inside rodata_test.c By declaring it static, it gets properly allocated into .rodata section instead of .data: c04df710 l O .rodata 00000004 rodata_test_data Fixes: 056b9d8a7692 ("mm: remove rodata_test_data export, add pr_fmt") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Christophe Leroy <[email protected]> Cc: Kees Cook <[email protected]> Cc: Jinbum Park <[email protected]> Cc: Segher Boessenkool <[email protected]> Cc: David Laight <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- mm/rodata_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/rodata_test.c +++ b/mm/rodata_test.c @@ -14,7 +14,7 @@ #include <linux/uaccess.h> #include <asm/sections.h> -const int rodata_test_data = 0xC3; +static const int rodata_test_data = 0xC3; void rodata_test(void) {
