From: kbuild test robot <fengguang.wu@intel.com>
To: Vladimir Davydov <vdavydov@parallels.com>
Cc: kbuild-all@01.org, Johannes Weiner <hannes@cmpxchg.org>,
Andres Lagar-Cavilla <andreslc@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: [mmotm:master 260/385] include/linux/mmu_notifier.h:247:19: sparse: context imbalance in 'kpageidle_clear_pte_refs_one' - unexpected unlock
Date: Fri, 24 Jul 2015 19:14:46 +0800 [thread overview]
Message-ID: <201507241941.wqF1a0kN%fengguang.wu@intel.com> (raw)
tree: git://git.cmpxchg.org/linux-mmotm.git master
head: 61f5f835b6f06fbc233481b5d3c0afd71ecf54e8
commit: a06e045a2c99e39bf342ccb5dbbd6655f3814238 [260/385] proc: add kpageidle file
reproduce:
# apt-get install sparse
git checkout a06e045a2c99e39bf342ccb5dbbd6655f3814238
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> include/linux/mmu_notifier.h:247:19: sparse: context imbalance in 'kpageidle_clear_pte_refs_one' - unexpected unlock
vim +/kpageidle_clear_pte_refs_one +247 include/linux/mmu_notifier.h
cddb8a5c Andrea Arcangeli 2008-07-28 231
cddb8a5c Andrea Arcangeli 2008-07-28 232 static inline void mmu_notifier_release(struct mm_struct *mm)
cddb8a5c Andrea Arcangeli 2008-07-28 233 {
cddb8a5c Andrea Arcangeli 2008-07-28 234 if (mm_has_notifiers(mm))
cddb8a5c Andrea Arcangeli 2008-07-28 235 __mmu_notifier_release(mm);
cddb8a5c Andrea Arcangeli 2008-07-28 236 }
cddb8a5c Andrea Arcangeli 2008-07-28 237
cddb8a5c Andrea Arcangeli 2008-07-28 238 static inline int mmu_notifier_clear_flush_young(struct mm_struct *mm,
57128468 Andres Lagar-Cavilla 2014-09-22 239 unsigned long start,
57128468 Andres Lagar-Cavilla 2014-09-22 240 unsigned long end)
cddb8a5c Andrea Arcangeli 2008-07-28 241 {
cddb8a5c Andrea Arcangeli 2008-07-28 242 if (mm_has_notifiers(mm))
57128468 Andres Lagar-Cavilla 2014-09-22 243 return __mmu_notifier_clear_flush_young(mm, start, end);
cddb8a5c Andrea Arcangeli 2008-07-28 244 return 0;
cddb8a5c Andrea Arcangeli 2008-07-28 245 }
cddb8a5c Andrea Arcangeli 2008-07-28 246
59eaee21 Vladimir Davydov 2015-07-23 @247 static inline int mmu_notifier_clear_young(struct mm_struct *mm,
59eaee21 Vladimir Davydov 2015-07-23 248 unsigned long start,
59eaee21 Vladimir Davydov 2015-07-23 249 unsigned long end)
59eaee21 Vladimir Davydov 2015-07-23 250 {
59eaee21 Vladimir Davydov 2015-07-23 251 if (mm_has_notifiers(mm))
59eaee21 Vladimir Davydov 2015-07-23 252 return __mmu_notifier_clear_young(mm, start, end);
59eaee21 Vladimir Davydov 2015-07-23 253 return 0;
59eaee21 Vladimir Davydov 2015-07-23 254 }
59eaee21 Vladimir Davydov 2015-07-23 255
:::::: The code at line 247 was first introduced by commit
:::::: 59eaee21bfc9e38e75a18a8c28cc145f21be7314 mmu-notifier: add clear_young callback
:::::: TO: Vladimir Davydov <vdavydov@parallels.com>
:::::: CC: Johannes Weiner <hannes@cmpxchg.org>
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next reply other threads:[~2015-07-24 11:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-24 11:14 kbuild test robot [this message]
2015-07-24 11:54 ` Vladimir Davydov
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