Commit 46cb11b1 authored by Andre Przywara's avatar Andre Przywara Committed by Catalin Marinas
Browse files

kselftest/arm64: mte: user_mem: Fix write() warning 



Out of the box Ubuntu's 20.04 compiler warns about missing return value
checks for write() (sys)calls.

Make GCC happy by checking whether we actually managed to write "val".

Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarMark Brown <broone@kernel.org>
Link: https://lore.kernel.org/r/20210319165334.29213-5-andre.przywara@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 31c88729

tools/testing/selftests/arm64/mte/check_user_mem.c

+2 −1
Original line number Diff line number Diff line
@@ -33,7 +33,8 @@ static int check_usermem_access_fault(int mem_type, int mode, int mapping) 
	if (fd == -1)

		return KSFT_FAIL;

	for (i = 0; i < len; i++)

		write(fd, &val, sizeof(val));

		if (write(fd, &val, sizeof(val)) != sizeof(val))

			return KSFT_FAIL;

	lseek(fd, 0, 0);

	ptr = mte_allocate_memory(len, mem_type, mapping, true);

	if (check_allocated_memory(ptr, len, mem_type, true) != KSFT_PASS) {