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SubjectRe: [PATCH v16 13/25] mm: pagewalk: Don't lock PTEs for walk_page_range_novma()
Hi Steven,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.5-rc1 next-20191209]
[cannot apply to arm64/for-next/core tip/x86/mm]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see]

base: ad910e36da4ca3a1bd436989f632d062dda0c921
# apt-get install sparse
# sparse version: v0.6.1-101-g82dee2e-dirty
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <>

sparse warnings: (new ones prefixed by >>)

>> include/linux/spinlock.h:378:9: sparse: sparse: context imbalance in 'walk_pte_range' - unexpected unlock

vim +/walk_pte_range +378 include/linux/spinlock.h

c2f21ce2e31286 Thomas Gleixner 2009-12-02 375
3490565b633c70 Denys Vlasenko 2015-07-13 376 static __always_inline void spin_unlock(spinlock_t *lock)
c2f21ce2e31286 Thomas Gleixner 2009-12-02 377 {
c2f21ce2e31286 Thomas Gleixner 2009-12-02 @378 raw_spin_unlock(&lock->rlock);
c2f21ce2e31286 Thomas Gleixner 2009-12-02 379 }
c2f21ce2e31286 Thomas Gleixner 2009-12-02 380

:::::: The code at line 378 was first introduced by commit
:::::: c2f21ce2e31286a0a32f8da0a7856e9ca1122ef3 locking: Implement new raw_spinlock

:::::: TO: Thomas Gleixner <>
:::::: CC: Thomas Gleixner <>

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation

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