On 08/11/2024 12:05, Catalin Marinas wrote:

Since commit 49f59573e9e0 ("selftests/mm: Enable pkey_sighandler_tests on arm64"), pkey_sighandler_tests.c (which includes pkey-arm64.h via pkey-helpers.h) ends up compiled for arm64. Since it doesn't use aarch64_write_signal_pkey(), the compiler warns:

In file included from pkey-helpers.h:106, from pkey_sighandler_tests.c:31: pkey-arm64.h:130:13: warning: ‘aarch64_write_signal_pkey’ defined but not used [-Wunused-function] 130 | static void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) | ^~~~~~~~~~~~~~~~~~~~~~~~~

Make the aarch64_write_signal_pkey() a 'static inline void' function to avoid the compiler warning.

Fixes: f5b5ea51f78f ("selftests: mm: make protection_keys test work on arm64") Cc: Shuah Khan skhan@linuxfoundation.org Cc: Joey Gouly joey.gouly@arm.com Cc: Kevin Brodsky kevin.brodsky@arm.com Signed-off-by: Catalin Marinas catalin.marinas@arm.com

I've got this diff locally, didn't realise it was my patches that revealed the issue otherwise I'd have posted it earlier. Either way:

Reviewed-by: Kevin Brodsky kevin.brodsky@arm.com

- Kevin

---

I'll add this on top of the arm64 for-next/pkey-signal branch together with Kevin's other patches.

tools/testing/selftests/mm/pkey-arm64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/pkey-arm64.h b/tools/testing/selftests/mm/pkey-arm64.h index d57fbeace38f..d9d2100eafc0 100644 --- a/tools/testing/selftests/mm/pkey-arm64.h +++ b/tools/testing/selftests/mm/pkey-arm64.h @@ -127,7 +127,7 @@ static inline u64 get_pkey_bits(u64 reg, int pkey) return 0; } -static void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) +static inline void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) { struct _aarch64_ctx *ctx = GET_UC_RESV_HEAD(uctxt); struct poe_context *poe_ctx =