Hi Jia-Ju, [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v4.12-rc3 next-20170531] [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/Jia-Ju-Bai/ivtv-Fix-a-sleep-in-atomic-bug-in-snd_ivtv_pcm_hw_free/20170601-131112 base: git://linuxtv.org/media_tree.git master config: xtensa-allmodconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 4.9.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=xtensa Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/media//pci/ivtv/ivtv-alsa-pcm.c: In function 'snd_ivtv_pcm_hw_free': >> drivers/media//pci/ivtv/ivtv-alsa-pcm.c:274:2: warning: 'dma_area' may be used uninitialized in this function [-Wmaybe-uninitialized] vfree(dma_area); ^ vim +/dma_area +274 drivers/media//pci/ivtv/ivtv-alsa-pcm.c 258 params_buffer_bytes(params)); 259 } 260 261 static int snd_ivtv_pcm_hw_free(struct snd_pcm_substream *substream) 262 { 263 struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream); 264 unsigned long flags; 265 unsigned char *dma_area; 266 267 spin_lock_irqsave(&itvsc->slock, flags); 268 if (substream->runtime->dma_area) { 269 dprintk("freeing pcm capture region\n"); 270 dma_area = substream->runtime->dma_area; 271 substream->runtime->dma_area = NULL; 272 } 273 spin_unlock_irqrestore(&itvsc->slock, flags); > 274 vfree(dma_area); 275 276 return 0; 277 } 278 279 static int snd_ivtv_pcm_prepare(struct snd_pcm_substream *substream) 280 { 281 struct snd_ivtv_card *itvsc = snd_pcm_substream_chip(substream); 282 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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