From b473a3891c46393e9c4ccb4e3197d7fb259c7100 Mon Sep 17 00:00:00 2001 From: Marco Elver Date: Mon, 6 Dec 2021 07:41:51 +0100 Subject: 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 Signed-off-by: Marco Elver Signed-off-by: Paul E. McKenney --- kernel/kcsan/kcsan_test.c | 8 +++++--- kernel/kcsan/selftest.c | 8 +++++--- 2 files changed, 10 insertions(+), 6 deletions(-) (limited to 'kernel/kcsan') 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; -- cgit v1.2.3