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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-10-31 00:59:01 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-07 17:01:31 -0800
commit7c9906ca5e582a773fff696975e312cef58a7386 (patch)
tree1155e2ed10709b9d3efa87b2f4b826cc886e84eb /.gitignore
parentd117c8aa1d511f76401337620b9c4ffb4c886579 (diff)
rcu: Don't redundantly disable irqs in rcu_irq_{enter,exit}()
This commit replaces a local_irq_save()/local_irq_restore() pair with a lockdep assertion that interrupts are already disabled. This should remove the corresponding overhead from the interrupt entry/exit fastpaths. This change was inspired by the fact that Iftekhar Ahmed's mutation testing showed that removing rcu_irq_enter()'s call to local_ird_restore() had no effect, which might indicate that interrupts were always enabled anyway. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions