Commit ff446cd7 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Avoid GCC 12 uninitialised variable warning 



GCC 12 thinks that `actual` might be used uninitialised. It's not, the
use is guarded by `bad_mmcr2` which is only set to true at the same
point where `actual` is initialised.

  cycles_with_mmcr2_test.c: In function ‘cycles_with_mmcr2’:
  cycles_with_mmcr2_test.c:81:17: error: ‘actual’ may be used uninitialized [-Werror=maybe-uninitialized]
     81 |                 printf("Bad MMCR2 value seen is 0x%lx\n", actual);

Silence the warning by initialising `actual` to zero.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220801113746.802046-1-mpe@ellerman.id.au
parent df5d4b61

tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ int cycles_with_mmcr2(void) 
	expected[1] = MMCR2_EXPECTED_2;

	i = 0;

	bad_mmcr2 = false;

	actual = 0;



	/* Make sure we loop until we take at least one EBB */

	while ((ebb_state.stats.ebb_count < 20 && !bad_mmcr2) ||