From: kernel test robot <lkp@intel.com>
To: cluster-devel.redhat.com
Subject: [Cluster-devel] [gfs2:for-next.bob6b 5/12] arch/mips/include/asm/bitops.h:129:17: sparse: sparse: context imbalance in 'gfs2_remove_from_journal' - different lock contexts for basic block
Date: Sun, 2 Aug 2020 02:18:05 +0800 [thread overview]
Message-ID: <202008020259.6elQySEE%lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next.bob6b
head: 8aef3eb9d3f560027f23e9690d0eca9427ba520d
commit: 338462527fad3a08cda656c2cc2f44d9ae319e42 [5/12] gfs2: Wipe jdata and ail1 in gfs2_journal_wipe, formerly gfs2_meta_wipe
config: mips-randconfig-s031-20200801 (attached as .config)
compiler: mipsel-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 338462527fad3a08cda656c2cc2f44d9ae319e42
# 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=mips
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 >>)
fs/gfs2/meta_io.c: note: in included file (through include/linux/bitops.h, include/linux/kernel.h, include/asm-generic/bug.h, ...):
>> arch/mips/include/asm/bitops.h:129:17: sparse: sparse: context imbalance in 'gfs2_remove_from_journal' - different lock contexts for basic block
vim +/gfs2_remove_from_journal +129 arch/mips/include/asm/bitops.h
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 107
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 108 /*
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 109 * clear_bit - Clears a bit in memory
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 110 * @nr: Bit to clear
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 111 * @addr: Address to start counting from
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 112 *
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 113 * clear_bit() is atomic and may not be reordered. However, it does
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 114 * not contain a memory barrier, so if it is used for locking purposes,
91bbefe6b0fcd29 arch/mips/include/asm/bitops.h Peter Zijlstra 2014-03-13 115 * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 116 * in order to ensure changes are visible on other processors.
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 117 */
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 118 static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 119 {
c042be02d730534 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 120 volatile unsigned long *m = &addr[BIT_WORD(nr)];
c042be02d730534 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 121 int bit = nr % BITS_PER_LONG;
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 122
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 123 if (!kernel_uses_llsc) {
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 124 __mips_clear_bit(nr, addr);
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 125 return;
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 126 }
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 127
59361e9975fd567 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 128 if ((MIPS_ISA_REV >= 2) && __builtin_constant_p(bit)) {
cc99987c375e499 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 @129 __bit_op(*m, __INS "%0, $0, %2, 1", "i"(bit));
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 130 return;
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 131 }
fe7cd97e68fac18 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 132
cc99987c375e499 arch/mips/include/asm/bitops.h Paul Burton 2019-10-01 133 __bit_op(*m, "and\t%0, %2", "ir"(~BIT(bit)));
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 134 }
^1da177e4c3f415 include/asm-mips/bitops.h Linus Torvalds 2005-04-16 135
:::::: The code at line 129 was first introduced by commit
:::::: cc99987c375e499a95572504d69c215591222072 MIPS: bitops: Abstract LL/SC loops
:::::: TO: Paul Burton <paul.burton@mips.com>
:::::: CC: Paul Burton <paul.burton@mips.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all at lists.01.org
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