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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 10:15:30 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 10:15:30 -0800 |
commit | d772794637451c424729dd71690d7ac158523108 (patch) | |
tree | 1ac5db7ba0a237e519e6d123e1f95d79dc4baa34 /mm | |
parent | c1488798adaf71461c5b679e5b54c2963be5e61c (diff) | |
parent | 475c5ee193fd682c6383b5e418e65e46a477d176 (diff) | |
download | linux-stable-d772794637451c424729dd71690d7ac158523108.tar.gz linux-stable-d772794637451c424729dd71690d7ac158523108.tar.bz2 linux-stable-d772794637451c424729dd71690d7ac158523108.zip |
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
"The main RCU changes in this cycle were:
- Updates to use cond_resched() instead of cond_resched_rcu_qs()
where feasible (currently everywhere except in kernel/rcu and in
kernel/torture.c). Also a couple of fixes to avoid sending IPIs to
offline CPUs.
- Updates to simplify RCU's dyntick-idle handling.
- Updates to remove almost all uses of smp_read_barrier_depends() and
read_barrier_depends().
- Torture-test updates.
- Miscellaneous fixes"
* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (72 commits)
torture: Save a line in stutter_wait(): while -> for
torture: Eliminate torture_runnable and perf_runnable
torture: Make stutter less vulnerable to compilers and races
locking/locktorture: Fix num reader/writer corner cases
locking/locktorture: Fix rwsem reader_delay
torture: Place all torture-test modules in one MAINTAINERS group
rcutorture/kvm-build.sh: Skip build directory check
rcutorture: Simplify functions.sh include path
rcutorture: Simplify logging
rcutorture/kvm-recheck-*: Improve result directory readability check
rcutorture/kvm.sh: Support execution from any directory
rcutorture/kvm.sh: Use consistent help text for --qemu-args
rcutorture/kvm.sh: Remove unused variable, `alldone`
rcutorture: Remove unused script, config2frag.sh
rcutorture/configinit: Fix build directory error message
rcutorture: Preempt RCU-preempt readers more vigorously
torture: Reduce #ifdefs for preempt_schedule()
rcu: Remove have_rcu_nocb_mask from tree_plugin.h
rcu: Add comment giving debug strategy for double call_rcu()
tracing, rcu: Hide trace event rcu_nocb_wake when not used
...
Diffstat (limited to 'mm')
-rw-r--r-- | mm/ksm.c | 9 | ||||
-rw-r--r-- | mm/mlock.c | 2 |
2 files changed, 2 insertions, 9 deletions
@@ -675,15 +675,8 @@ static struct page *get_ksm_page(struct stable_node *stable_node, bool lock_it) expected_mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM); again: - kpfn = READ_ONCE(stable_node->kpfn); + kpfn = READ_ONCE(stable_node->kpfn); /* Address dependency. */ page = pfn_to_page(kpfn); - - /* - * page is computed from kpfn, so on most architectures reading - * page->mapping is naturally ordered after reading node->kpfn, - * but on Alpha we need to be more careful. - */ - smp_read_barrier_depends(); if (READ_ONCE(page->mapping) != expected_mapping) goto stale; diff --git a/mm/mlock.c b/mm/mlock.c index 30472d438794..f7f54fd2e13f 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -779,7 +779,7 @@ static int apply_mlockall_flags(int flags) /* Ignore errors */ mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags); - cond_resched_rcu_qs(); + cond_resched(); } out: return 0; |