tree: git://anongit.freedesktop.org/drm-intel drm-intel-nightly
head: 2f9f22b419350cafb06ba7e5342bc461fcb0afca
commit: 43dc7fe2b2118c76fbc2808dec0c57b3158e6dc0 [1077/1091] drm: Mark up accesses of vblank->enabled outside of its spinlock
config: tile-tilegx_defconfig (attached as .config)
compiler: tilegx-linux-gcc (GCC) 4.6.2
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 43dc7fe2b2118c76fbc2808dec0c57b3158e6dc0
# save the attached .config to linux build tree
make.cross ARCH=tile
All errors (new ones prefixed by >>):
drivers/gpu/drm/drm_irq.c: In function 'vblank_disable_and_save':
drivers/gpu/drm/drm_irq.c:341:5: warning: '__x' may be used uninitialized in this function [-Wuninitialized]
>> drivers/gpu/drm/drm_irq.c:341:6: error: call to '__cmpxchg_called_with_bad_pointer' declared with attribute error: Bad argument size for cmpxchg
vim +/__cmpxchg_called_with_bad_pointer +341 drivers/gpu/drm/drm_irq.c
335
336 /*
337 * Only disable vblank interrupts if they're enabled. This avoids
338 * calling the ->disable_vblank() operation in atomic context with the
339 * hardware potentially runtime suspended.
340 */
> 341 if (cmpxchg_relaxed(&vblank->enabled, true, false))
342 __disable_vblank(dev, pipe);
343
344 /*
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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