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authorPeter Zijlstra <peterz@infradead.org>2013-11-19 19:13:38 +0400
committerIngo Molnar <mingo@kernel.org>2014-01-13 20:32:27 +0400
commit0bd3a173d711857fc9f583eb5825386cc08f3948 (patch)
tree3807a2744f0e22afa0a009c6c2cb2bf8d7fb746e /include/linux/hardirq.h
parent10b033d434c25a6c9e0f4f4dc2418af1b8236c63 (diff)
downloadlinux-0bd3a173d711857fc9f583eb5825386cc08f3948.tar.xz
sched/preempt, locking: Rework local_bh_{dis,en}able()
Currently local_bh_disable() is out-of-line for no apparent reason. So inline it to save a few cycles on call/return nonsense, the function body is a single add on x86 (a few loads and store extra on load/store archs). Also expose two new local_bh functions: __local_bh_{dis,en}able_ip(unsigned long ip, unsigned int cnt); Which implement the actual local_bh_{dis,en}able() behaviour. The next patch uses the exposed @cnt argument to optimize bh lock functions. With build fixes from Jacob Pan. Cc: rjw@rjwysocki.net Cc: rui.zhang@intel.com Cc: jacob.jun.pan@linux.intel.com Cc: Mike Galbraith <bitbucket@online.de> Cc: hpa@zytor.com Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: lenb@kernel.org Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20131119151338.GF3694@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/hardirq.h')
-rw-r--r--include/linux/hardirq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index d9cf963ac832..12d5f972f23f 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -5,6 +5,7 @@
#include <linux/lockdep.h>
#include <linux/ftrace_irq.h>
#include <linux/vtime.h>
+#include <asm/hardirq.h>
extern void synchronize_irq(unsigned int irq);