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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-05-21 05:57:18 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-07-19 21:38:53 -0700 |
| commit | be0e1e21ef707be4d16ea6a96ac9997463e4b8d2 (patch) | |
| tree | fe53c0731f5c3a6e56e2358eee9b8f17c3af83f4 /kernel/posix-cpu-timers.c | |
| parent | rcu: Fix RCU_BOOST race handling current->rcu_read_unlock_special (diff) | |
| download | linux-dev-be0e1e21ef707be4d16ea6a96ac9997463e4b8d2.tar.xz linux-dev-be0e1e21ef707be4d16ea6a96ac9997463e4b8d2.zip | |
rcu: Streamline code produced by __rcu_read_unlock()
Given some common flag combinations, particularly -Os, gcc will inline
rcu_read_unlock_special() despite its being in an unlikely() clause.
Use noinline to prohibit this misoptimization.
In addition, move the second barrier() in __rcu_read_unlock() so that
it is not on the common-case code path. This will allow the compiler to
generate better code for the common-case path through __rcu_read_unlock().
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Diffstat (limited to 'kernel/posix-cpu-timers.c')
0 files changed, 0 insertions, 0 deletions