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selftests/powerpc: Avoid GCC 12 uninitialised variable warning

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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: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220801113746.802046-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2022-08-01 18:48:34 +10:00
parent df5d4b616e
commit ff446cd768
1 changed files with 1 additions and 0 deletions
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tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
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@ -50,6 +50,7 @@ int cycles_with_mmcr2(void)
expected[1] = MMCR2_EXPECTED_2; expected[1] = MMCR2_EXPECTED_2;
i = 0; i = 0;
bad_mmcr2 = false; bad_mmcr2 = false;
actual = 0;
/* Make sure we loop until we take at least one EBB */ /* Make sure we loop until we take at least one EBB */
while ((ebb_state.stats.ebb_count < 20 && !bad_mmcr2) || while ((ebb_state.stats.ebb_count < 20 && !bad_mmcr2) ||