arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_peek' - different lock contexts for basic block

arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_peek' - different lock contexts for basic block

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Christophe Leroy <christophe.leroy@c-s.fr>
CC: Michael Ellerman <mpe@ellerman.id.au>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d52daa8620c65960e1ef882adc1f92061326bd7a
commit: b020aa9d1e875c1c91b1390acdf42320e7060d84 powerpc: cleanup hw_irq.h
date:   9 months ago
:::::: branch date: 4 hours ago
:::::: commit date: 9 months ago
config: powerpc-randconfig-s032-20200802 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.2-115-g5fc204f2-dirty
        git checkout b020aa9d1e875c1c91b1390acdf42320e7060d84
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

   kernel/trace/ring_buffer.c:696:32: sparse: sparse: incorrect type in return expression (different base types) @@     expected restricted __poll_t @@     got int @@
   kernel/trace/ring_buffer.c:696:32: sparse:     expected restricted __poll_t
   kernel/trace/ring_buffer.c:696:32: sparse:     got int
   kernel/trace/ring_buffer.c: note: in included file (through arch/powerpc/include/asm/irqflags.h, include/linux/irqflags.h, include/linux/spinlock.h, ...):
>> arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_peek' - different lock contexts for basic block
>> arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_consume' - different lock contexts for basic block
>> arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_empty' - different lock contexts for basic block
>> arch/powerpc/include/asm/hw_irq.h:293:17: sparse: sparse: context imbalance in 'ring_buffer_empty_cpu' - different lock contexts for basic block

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b020aa9d1e875c1c91b1390acdf42320e7060d84
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git remote update linus
git checkout b020aa9d1e875c1c91b1390acdf42320e7060d84
vim +/ring_buffer_peek +293 arch/powerpc/include/asm/hw_irq.h

df9ee29270c11db arch/powerpc/include/asm/hw_irq.h David Howells    2010-10-07  287  
df9ee29270c11db arch/powerpc/include/asm/hw_irq.h David Howells    2010-10-07  288  static inline void arch_local_irq_restore(unsigned long flags)
df9ee29270c11db arch/powerpc/include/asm/hw_irq.h David Howells    2010-10-07  289  {
b020aa9d1e875c1 arch/powerpc/include/asm/hw_irq.h Christophe Leroy 2019-08-29  290  	if (IS_ENABLED(CONFIG_BOOKE))
b020aa9d1e875c1 arch/powerpc/include/asm/hw_irq.h Christophe Leroy 2019-08-29  291  		wrtee(flags);
b020aa9d1e875c1 arch/powerpc/include/asm/hw_irq.h Christophe Leroy 2019-08-29  292  	else
df9ee29270c11db arch/powerpc/include/asm/hw_irq.h David Howells    2010-10-07 @293  		mtmsr(flags);
df9ee29270c11db arch/powerpc/include/asm/hw_irq.h David Howells    2010-10-07  294  }
^1da177e4c3f415 include/asm-ppc64/hw_irq.h        Linus Torvalds   2005-04-16  295  

:::::: The code at line 293 was first introduced by commit
:::::: df9ee29270c11dba7d0fe0b83ce47a4d8e8d2101 Fix IRQ flag handling naming

:::::: TO: David Howells <dhowells@redhat.com>
:::::: CC: David Howells <dhowells@redhat.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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