From 6bb955fce08cbc8495a72755130d2d220994faee Mon Sep 17 00:00:00 2001 From: Tao Su Date: Thu, 9 May 2024 13:31:12 +0800 Subject: [PATCH] Revert "selftests/harness: remove use of LINE_MAX" Patch series "Selftests: Fix compilation warnings due to missing _GNU_SOURCE definition", v2. Since kselftest_harness.h introduces asprintf()[1], many selftests have compilation warnings or errors due to missing _GNU_SOURCE definitions. The issue stems from a lack of a LINE_MAX definition in Android (see commit 38c957f07038), which is the reason why asprintf() was introduced. We tried adding _GNU_SOURCE definitions to more selftests to fix, but asprintf() may continue to cause problems, and since it is quite late in the 6.9 cycle, we would like to revert 809216233555 first to provide testing for forks[2]. [1] https://lore.kernel.org/all/20240411231954.62156-1-edliaw@google.com [2] https://lore.kernel.org/linux-kselftest/ZjuA3aY_iHkjP7bQ@google.com This patch (of 2): This reverts commit 8092162335554c8ef5e7f50eff68aa9cfbdbf865. asprintf() is declared in stdio.h when defining _GNU_SOURCE, but stdio.h is so common that many files don't define _GNU_SOURCE before including stdio.h, and defining _GNU_SOURCE after including stdio.h will no longer take effect, which causes warnings or even errors during compilation in many selftests. Revert 'commit 809216233555 ("selftests/harness: remove use of LINE_MAX")' as that came in quite late in the 6.9 cycle. Link: https://lkml.kernel.org/r/20240509053113.43462-1-tao1.su@linux.intel.com Link: https://lore.kernel.org/linux-kselftest/ZjuA3aY_iHkjP7bQ@google.com/ Link: https://lkml.kernel.org/r/20240509053113.43462-2-tao1.su@linux.intel.com Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX") Signed-off-by: Tao Su Reviewed-by: Simon Horman Cc: Alexandre Belloni Cc: Bongsu Jeon Cc: Dave Hansen Cc: David S. Miller Cc: Edward Liaw Cc: Eric Dumazet Cc: Ivan Orlov Cc: Jakub Kicinski Cc: Jarkko Sakkinen Cc: Jaroslav Kysela Cc: Mark Brown Cc: Paolo Abeni Cc: Paolo Bonzini Cc: Sean Christopherson Cc: Shuah Khan Cc: Takashi Iwai Signed-off-by: Andrew Morton --- tools/testing/selftests/kselftest_harness.h | 12 ++++-------- tools/testing/selftests/mm/mdwe_test.c | 1 - 2 files changed, 4 insertions(+), 9 deletions(-) diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h index 37b03f1b8741d..605372356dd63 100644 --- a/tools/testing/selftests/kselftest_harness.h +++ b/tools/testing/selftests/kselftest_harness.h @@ -56,6 +56,7 @@ static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined"); #include #include #include +#include #include #include #include @@ -1216,7 +1217,7 @@ void __run_test(struct __fixture_metadata *f, struct __test_metadata *t) { struct __test_xfail *xfail; - char *test_name; + char test_name[LINE_MAX]; const char *diagnostic; /* reset test struct */ @@ -1227,12 +1228,8 @@ void __run_test(struct __fixture_metadata *f, memset(t->env, 0, sizeof(t->env)); memset(t->results->reason, 0, sizeof(t->results->reason)); - if (asprintf(&test_name, "%s%s%s.%s", f->name, - variant->name[0] ? "." : "", variant->name, t->name) == -1) { - ksft_print_msg("ERROR ALLOCATING MEMORY\n"); - t->exit_code = KSFT_FAIL; - _exit(t->exit_code); - } + snprintf(test_name, sizeof(test_name), "%s%s%s.%s", + f->name, variant->name[0] ? "." : "", variant->name, t->name); ksft_print_msg(" RUN %s ...\n", test_name); @@ -1270,7 +1267,6 @@ void __run_test(struct __fixture_metadata *f, ksft_test_result_code(t->exit_code, test_name, diagnostic ? "%s" : NULL, diagnostic); - free(test_name); } static int test_harness_run(int argc, char **argv) diff --git a/tools/testing/selftests/mm/mdwe_test.c b/tools/testing/selftests/mm/mdwe_test.c index 1e01d3ddc11c5..200bedcdc32e9 100644 --- a/tools/testing/selftests/mm/mdwe_test.c +++ b/tools/testing/selftests/mm/mdwe_test.c @@ -7,7 +7,6 @@ #include #include -#define _GNU_SOURCE #include #include #include -- 2.30.2