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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-04 17:34:01 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-10-04 17:34:01 +0200 |
| commit | 013a8ee6284280f8032cadfec37bcc3cfbfff81b (patch) | |
| tree | a321919a3d94aa4adce6b9e4859d7f0a3763a0f6 /kernel/rcu | |
| parent | Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| parent | rcu: Remove extraneous READ_ONCE()s from rcu_irq_{enter,exit}() (diff) | |
| download | linux-013a8ee6284280f8032cadfec37bcc3cfbfff81b.tar.xz linux-013a8ee6284280f8032cadfec37bcc3cfbfff81b.zip | |
Merge tag 'trace-v4.14-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixlets from Steven Rostedt:
"Two updates:
- A memory fix with left over code from spliting out ftrace_ops and
function graph tracer, where the function graph tracer could reset
the trampoline pointer, leaving the old trampoline not to be freed
(memory leak).
- The update to Paul's patch that added the unnecessary READ_ONCE().
This removes the unnecessary READ_ONCE() instead of having to
rebase the branch to update the patch that added it"
* tag 'trace-v4.14-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
rcu: Remove extraneous READ_ONCE()s from rcu_irq_{enter,exit}()
ftrace: Fix kmemleak in unregister_ftrace_graph
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0c44c7b42e6d..b0ad62b0e7b8 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -884,7 +884,7 @@ void rcu_irq_exit(void) rdtp = this_cpu_ptr(&rcu_dynticks); /* Page faults can happen in NMI handlers, so check... */ - if (READ_ONCE(rdtp->dynticks_nmi_nesting)) + if (rdtp->dynticks_nmi_nesting) return; WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && @@ -1022,7 +1022,7 @@ void rcu_irq_enter(void) rdtp = this_cpu_ptr(&rcu_dynticks); /* Page faults can happen in NMI handlers, so check... */ - if (READ_ONCE(rdtp->dynticks_nmi_nesting)) + if (rdtp->dynticks_nmi_nesting) return; oldval = rdtp->dynticks_nesting; |