Hi Robert, [auto build test WARNING on tip/locking/core] [also build test WARNING on v4.11-rc2 next-20170310] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Robert-Foss/locking-ww_mutex-Prevent-read-of-uninitialized-memory/20170317-085627 config: x86_64-randconfig-i0-201711 (attached as .config) compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): kernel/locking/test-ww_mutex.c: In function 'test_abba': >> kernel/locking/test-ww_mutex.c:199:9: warning: missing braces around >> initializer [-Wmissing-braces] struct test_abba abba = { 0 }; ^ kernel/locking/test-ww_mutex.c:199:9: warning: (near initialization for 'abba.work') [-Wmissing-braces] vim +199 kernel/locking/test-ww_mutex.c 183 if (abba->resolve && err == -EDEADLK) { 184 ww_mutex_unlock(&abba->b_mutex); 185 ww_mutex_lock_slow(&abba->a_mutex, &ctx); 186 err = ww_mutex_lock(&abba->b_mutex, &ctx); 187 } 188 189 if (!err) 190 ww_mutex_unlock(&abba->a_mutex); 191 ww_mutex_unlock(&abba->b_mutex); 192 ww_acquire_fini(&ctx); 193 194 abba->result = err; 195 } 196 197 static int test_abba(bool resolve) 198 { > 199 struct test_abba abba = { 0 }; 200 struct ww_acquire_ctx ctx; 201 int err, ret; 202 203 ww_mutex_init(&abba.a_mutex, &ww_class); 204 ww_mutex_init(&abba.b_mutex, &ww_class); 205 INIT_WORK_ONSTACK(&abba.work, test_abba_work); 206 init_completion(&abba.a_ready); 207 init_completion(&abba.b_ready); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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