Hi Takashi, [auto build test WARNING on sound/for-next] [also build test WARNING on v4.8-rc3 next-20160825] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information] url: https://github.com/0day-ci/linux/commits/Takashi-Sakamoto/ALSA-fireworks-accessing-to-user-space-outside-spinlock/20160827-045250 base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next config: tile-allyesconfig (attached as .config) compiler: tilegx-linux-gcc (GCC) 4.6.2 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=tile All warnings (new ones prefixed by >>): sound/firewire/tascam/tascam-hwdep.c: In function 'hwdep_read': >> sound/firewire/tascam/tascam-hwdep.c:24:8: warning: missing braces around initializer [-Wmissing-braces] sound/firewire/tascam/tascam-hwdep.c:24:8: warning: (near initialization for 'event.common') [-Wmissing-braces] vim +24 sound/firewire/tascam/tascam-hwdep.c 8 9 /* 10 * This codes give three functionality. 11 * 12 * 1.get firewire node information 13 * 2.get notification about starting/stopping stream 14 * 3.lock/unlock stream 15 */ 16 17 #include "tascam.h" 18 19 static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, 20 loff_t *offset) 21 { 22 struct snd_tscm *tscm = hwdep->private_data; 23 DEFINE_WAIT(wait); > 24 union snd_firewire_event event = {0}; 25 26 spin_lock_irq(&tscm->lock); 27 28 while (!tscm->dev_lock_changed) { 29 prepare_to_wait(&tscm->hwdep_wait, &wait, TASK_INTERRUPTIBLE); 30 spin_unlock_irq(&tscm->lock); 31 schedule(); 32 finish_wait(&tscm->hwdep_wait, &wait); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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