| Message ID | 20210319165334.29213-11-andre.przywara@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kselftest/arm64: mte: Fix feature detection and compilation | expand |
On Fri, Mar 19, 2021 at 9:53 AM Andre Przywara <andre.przywara@arm.com> wrote: > > if (!prctl(...) == 0) is not only cumbersome to read, it also upsets > clang and triggers a warning: > ------------ > mte_common_util.c:287:6: warning: logical not is only applied to the > left hand side of this comparison [-Wlogical-not-parentheses] > .... > > Fix that by just comparing against "not 0" instead. > > Signed-off-by: Andre Przywara <andre.przywara@arm.com> > --- > tools/testing/selftests/arm64/mte/mte_common_util.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/arm64/mte/mte_common_util.c b/tools/testing/selftests/arm64/mte/mte_common_util.c > index aa8a8a6b8b6d..040abdca079d 100644 > --- a/tools/testing/selftests/arm64/mte/mte_common_util.c > +++ b/tools/testing/selftests/arm64/mte/mte_common_util.c > @@ -284,7 +284,7 @@ int mte_switch_mode(int mte_option, unsigned long incl_mask) > > en |= (incl_mask << PR_MTE_TAG_SHIFT); > /* Enable address tagging ABI, mte error reporting mode and tag inclusion mask. */ > - if (!prctl(PR_SET_TAGGED_ADDR_CTRL, en, 0, 0, 0) == 0) { > + if (prctl(PR_SET_TAGGED_ADDR_CTRL, en, 0, 0, 0) != 0) { How about `if (prctl(...)) {`? > ksft_print_msg("FAIL:prctl PR_SET_TAGGED_ADDR_CTRL for mte mode\n"); > return -EINVAL; > } > -- > 2.17.5 >
diff --git a/tools/testing/selftests/arm64/mte/mte_common_util.c b/tools/testing/selftests/arm64/mte/mte_common_util.c index aa8a8a6b8b6d..040abdca079d 100644 --- a/tools/testing/selftests/arm64/mte/mte_common_util.c +++ b/tools/testing/selftests/arm64/mte/mte_common_util.c @@ -284,7 +284,7 @@ int mte_switch_mode(int mte_option, unsigned long incl_mask) en |= (incl_mask << PR_MTE_TAG_SHIFT); /* Enable address tagging ABI, mte error reporting mode and tag inclusion mask. */ - if (!prctl(PR_SET_TAGGED_ADDR_CTRL, en, 0, 0, 0) == 0) { + if (prctl(PR_SET_TAGGED_ADDR_CTRL, en, 0, 0, 0) != 0) { ksft_print_msg("FAIL:prctl PR_SET_TAGGED_ADDR_CTRL for mte mode\n"); return -EINVAL; }
if (!prctl(...) == 0) is not only cumbersome to read, it also upsets clang and triggers a warning: ------------ mte_common_util.c:287:6: warning: logical not is only applied to the left hand side of this comparison [-Wlogical-not-parentheses] .... Fix that by just comparing against "not 0" instead. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- tools/testing/selftests/arm64/mte/mte_common_util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)