Hi Waiman, [auto build test WARNING on linus/master] [also build test WARNING on v4.10-rc1 next-20161224] [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/Waiman-Long/futex-Introducing-throughput-optimized-TP-futexes/20161230-020021 config: i386-randconfig-x006-201652 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): kernel/futex.c: In function 'futex_dump_show': >> kernel/futex.c:4444:33: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=] seq_printf(m, "\nHash bucket %ld:\n", hb - futex_queues); ^ kernel/futex.c: In function 'futex_lock': kernel/futex.c:3796:13: warning: 'rspin_timeout' may be used uninitialized in this function [-Wmaybe-uninitialized] else if (curtime > rspin_timeout) ^ kernel/futex.c:3676:6: note: 'rspin_timeout' was declared here u64 rspin_timeout; ^~~~~~~~~~~~~ vim +4444 kernel/futex.c 4428 4429 #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_SMP) 4430 /* 4431 * Debug code to dump selected content of in-kernel futex hash bucket table. 4432 */ 4433 #include <linux/debugfs.h> 4434 4435 static int futex_dump_show(struct seq_file *m, void *arg) 4436 { 4437 struct futex_hash_bucket *hb = arg; 4438 struct futex_state *state; 4439 int i; 4440 4441 if (list_empty(&hb->fs_head)) 4442 return 0; 4443 > 4444 seq_printf(m, "\nHash bucket %ld:\n", hb - futex_queues); 4445 spin_lock(&hb->fs_lock); 4446 i = 0; 4447 list_for_each_entry(state, &hb->fs_head, fs_list) { 4448 seq_printf(m, " Futex state %d\n", i++); 4449 if (state->owner) 4450 seq_printf(m, " owner PID = %d\n", 4451 task_pid_vnr(state->owner)); 4452 if (state->mutex_owner) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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