diff options
| author | Marco Elver <elver@google.com> | 2021-12-06 07:41:51 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-12-10 01:42:29 +0100 |
| commit | b473a3891c46393e9c4ccb4e3197d7fb259c7100 (patch) | |
| tree | 9389aa066707961d219283dc1c005d34743bf600 /kernel/kcsan | |
| parent | kcsan: Avoid nested contexts reading inconsistent reorder_access (diff) | |
| download | linux-b473a3891c46393e9c4ccb4e3197d7fb259c7100.tar.xz linux-b473a3891c46393e9c4ccb4e3197d7fb259c7100.zip | |
kcsan: Only test clear_bit_unlock_is_negative_byte if arch defines it
Some architectures do not define clear_bit_unlock_is_negative_byte().
Only test it when it is actually defined (similar to other usage, such
as in lib/test_kasan.c).
Link: https://lkml.kernel.org/r/202112050757.x67rHnFU-lkp@intel.com
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/kcsan')
| -rw-r--r-- | kernel/kcsan/kcsan_test.c | 8 | ||||
| -rw-r--r-- | kernel/kcsan/selftest.c | 8 |
2 files changed, 10 insertions, 6 deletions
diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c index 2bad0820f73a..a36fca063a73 100644 --- a/kernel/kcsan/kcsan_test.c +++ b/kernel/kcsan/kcsan_test.c @@ -598,7 +598,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_READ_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_READ_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_READ_BARRIER(spin_lock(&test_spinlock), false); @@ -644,7 +643,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_WRITE_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_WRITE_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_WRITE_BARRIER(spin_lock(&test_spinlock), false); @@ -690,7 +688,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_RW_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_RW_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_RW_BARRIER(spin_lock(&test_spinlock), false); @@ -698,6 +695,11 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_RW_BARRIER(mutex_lock(&test_mutex), false); KCSAN_EXPECT_RW_BARRIER(mutex_unlock(&test_mutex), true); +#ifdef clear_bit_unlock_is_negative_byte + KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); + KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); + KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); +#endif kcsan_nestable_atomic_end(); } diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c index b6d4da07d80a..75712959c84e 100644 --- a/kernel/kcsan/selftest.c +++ b/kernel/kcsan/selftest.c @@ -169,7 +169,6 @@ static bool __init test_barrier(void) KCSAN_CHECK_READ_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_READ_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_READ_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_READ_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); @@ -199,7 +198,6 @@ static bool __init test_barrier(void) KCSAN_CHECK_WRITE_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_WRITE_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_WRITE_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); @@ -232,12 +230,16 @@ static bool __init test_barrier(void) KCSAN_CHECK_RW_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_RW_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_RW_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_RW_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); KCSAN_CHECK_RW_BARRIER(spin_unlock(&test_spinlock)); +#ifdef clear_bit_unlock_is_negative_byte + KCSAN_CHECK_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); + KCSAN_CHECK_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); + KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); +#endif kcsan_nestable_atomic_end(); return ret; |