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  1. 28 Apr, 2016 35 commits
  2. 27 Apr, 2016 5 commits
    • Linus Torvalds's avatar
      Merge branch 'for-4.6-fixes' of git:// · b75a2bf8
      Linus Torvalds authored
      Pull workqueue fix from Tejun Heo:
       "So, it turns out we had a silly bug in the most fundamental part of
        workqueue for a very long time.  AFAICS, this dates back to pre-git
        era and has quite likely been there from the time workqueue was first
        A work item uses its PENDING bit to synchronize multiple queuers.
        Anyone who wins the PENDING bit owns the pending state of the work
        item.  Whether a queuer wins or loses the race, one thing should be
        guaranteed - there will soon be at least one execution of the work
        item - where "after" means that the execution instance would be able
        to see all the changes that the queuer has made prior to the queueing
        Unfortunately, we were missing a smp_mb() after clearing PENDING for
        execution, so nothing guaranteed visibility of the changes that a
        queueing loser has made, which manifested as a reproducible blk-mq
        Lots of kudos to Roman for debugging the problem.  The patch for
        -stable is the minimal one.  For v3.7, Peter is working on a patch to
        make the code path slightly more efficient and less fragile"
      * 'for-4.6-fixes' of git://
        workqueue: fix ghost PENDING flag while doing MQ IO
    • Linus Torvalds's avatar
      Merge branch 'for-4.6-fixes' of git:// · 763cfc86
      Linus Torvalds authored
      Pull cgroup fixes from Tejun Heo:
       "Two patches to fix a deadlock which can be easily triggered if memcg
        charge moving is used.
        This bug was introduced while converting threadgroup locking to a
        global percpu_rwsem and is caused by cgroup controller task migration
        path depending on the ability to create new kthreads.  cpuset had a
        similar issue which was fixed by performing heavy-lifting operations
        asynchronous to task migration.  The two patches fix the same issue in
        memcg in a similar way.  The first patch makes the mechanism generic
        and the second relocates memcg charge moving outside the migration
        Given that we don't want to perform heavy operations while
        writelocking threadgroup lock anyway, moving them out of the way is a
        desirable solution.  One thing to note is that the problem was
        difficult to debug because lockdep couldn't figure out the deadlock
        condition.  Looking into how to improve that"
      * 'for-4.6-fixes' of git://
        memcg: relocate charge moving from ->attach to ->post_attach
        cgroup, cpuset: replace cpuset_post_attach_flush() with cgroup_subsys->post_attach callback
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git:// · 3118e5f9
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "I2C has one buildfix, one ABBA deadlock fix, and three simple 'add ID'
      * 'i2c/for-current' of git://
        i2c: exynos5: Fix possible ABBA deadlock by keeping I2C clock prepared
        i2c: cpm: Fix build break due to incompatible pointer types
        i2c: ismt: Add Intel DNV PCI ID
        i2c: xlp9xx: add support for Broadcom Vulcan
        i2c: rk3x: add support for rk3228
    • Linus Torvalds's avatar
      Merge tag 'arc-4.6-rc6-fixes' of git:// · 24131a61
      Linus Torvalds authored
      Pull ARC fixes from Vineet Gupta:
       - lockdep now works for ARCv2 builds
       - enable DT reserved-memory binding (for forthcoming HDMI driver)
      * tag 'arc-4.6-rc6-fixes' of git://
        ARC: add support for reserved memory defined by device tree
        ARC: support generic per-device coherent dma mem
        Documentation: dt: arc: fix spelling mistakes
        ARCv2: Enable LOCKDEP
    • Linus Torvalds's avatar
      Merge tag 'nios2-v4.6-fix' of git:// · 508fea71
      Linus Torvalds authored
      Pull arch/nios2 fix from Ley Foon Tan:
       "memset: use the right constraint modifier for the %4 output operand"
      * tag 'nios2-v4.6-fix' of git://
        nios2: memset: use the right constraint modifier for the %4 output operand