linux-kernel - include/linux/mm.h:1734:21: sparse: sparse: context imbalance in 'gmap_make_secure'

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Date:   Sun, 9 Aug 2020 09:07:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Ulrich Weigand <Ulrich.Weigand@...ibm.com>
Subject: include/linux/mm.h:1734:21: sparse: sparse: context imbalance in
 'gmap_make_secure' - different lock contexts for basic block

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   06a81c1c7db9bd5de0bd38cd5acc44bb22b99150
commit: 214d9bbcd3a67230b932f6cea83c078ab34d9e70 s390/mm: provide memory management functions for protected KVM guests
date:   5 months ago
config: s390-randconfig-s032-20200809 (attached as .config)
compiler: s390-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: v0.6.2-118-ge1578773-dirty
        git checkout 214d9bbcd3a67230b932f6cea83c078ab34d9e70
        # 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=s390 

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


sparse warnings: (new ones prefixed by >>)

   arch/s390/kernel/uv.c: note: in included file (through include/linux/memblock.h):
>> include/linux/mm.h:1734:21: sparse: sparse: context imbalance in 'gmap_make_secure' - different lock contexts for basic block

vim +/gmap_make_secure +1734 include/linux/mm.h

d08b3851da41d0e Peter Zijlstra 2006-09-25  1731  
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1732  extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1733  			       spinlock_t **ptl);
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26 @1734  static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr,
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1735  				    spinlock_t **ptl)
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1736  {
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1737  	pte_t *ptep;
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1738  	__cond_lock(*ptl, ptep = __get_locked_pte(mm, addr, ptl));
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1739  	return ptep;
25ca1d6c02fe1c6 Namhyung Kim   2010-10-26  1740  }
c9cfcddfd657354 Linus Torvalds 2005-11-29  1741  

:::::: The code at line 1734 was first introduced by commit
:::::: 25ca1d6c02fe1c6d90d918867ef670d323725458 mm: wrap get_locked_pte() using __cond_lock()

:::::: TO: Namhyung Kim <namhyung@...il.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

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

Download attachment ".config.gz" of type "application/gzip" (26682 bytes)