From: Vincent Donnefort Date: Tue, 10 Sep 2024 16:23:34 +0000 (+0100) Subject: selftests/ring-buffer: Verify the entire meta-page padding X-Git-Tag: v6.12-rc1~107^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=21ff365b5c88c0bf8447989aadb5d8fe401c9cfc;p=thirdparty%2Fkernel%2Flinux.git selftests/ring-buffer: Verify the entire meta-page padding Improve the ring-buffer meta-page test coverage by checking for the entire padding region to be 0 instead of just looking at the first 4 bytes. Cc: linux-kselftest@vger.kernel.org Link: https://lore.kernel.org/20240910162335.2993310-2-vdonnefort@google.com Acked-by: Shuah Khan Signed-off-by: Vincent Donnefort Signed-off-by: Steven Rostedt (Google) --- diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c index 4bb0192e43f38..ba12fd31de87e 100644 --- a/tools/testing/selftests/ring-buffer/map_test.c +++ b/tools/testing/selftests/ring-buffer/map_test.c @@ -231,15 +231,15 @@ TEST_F(map, data_mmap) /* Verify meta-page padding */ if (desc->meta->meta_page_size > getpagesize()) { - void *addr; - data_len = desc->meta->meta_page_size; data = mmap(NULL, data_len, PROT_READ, MAP_SHARED, desc->cpu_fd, 0); ASSERT_NE(data, MAP_FAILED); - addr = (void *)((unsigned long)data + getpagesize()); - ASSERT_EQ(*((int *)addr), 0); + for (int i = desc->meta->meta_struct_len; + i < desc->meta->meta_page_size; i += sizeof(int)) + ASSERT_EQ(*(int *)(data + i), 0); + munmap(data, data_len); } }