Messages in this thread Patch in this message | | | From | Frederic Weisbecker <> | Subject | [RFC PATCH 14/30] softirq: Introduce local_bh_disable_all() | Date | Thu, 11 Oct 2018 01:12:01 +0200 |
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As we plan to narrow down local_bh_disable() to a per-vector disablement granularity, a shortcut can be handy for code that want to disable all of them and not care about carrying the bh enabled mask state prior to the call.
(TODO: check that it is called while bh are ALL enabled because local_bh_enable_all() is going to re-enable ALL of them. Pretty much like there should be no local_irq_enable() between a pair or local_irq_save() and local_irq_restore()).
Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: David S. Miller <davem@davemloft.net> Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- include/linux/bottom_half.h | 3 +++ kernel/softirq.c | 10 ++++++++++ 2 files changed, 13 insertions(+)
diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h index fd75d1a..192a71c 100644 --- a/include/linux/bottom_half.h +++ b/include/linux/bottom_half.h @@ -64,4 +64,7 @@ static inline void local_bh_enable(void) __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_DISABLE_OFFSET); } +extern void local_bh_disable_all(void); +extern void local_bh_enable_all(void); + #endif /* _LINUX_BH_H */ diff --git a/kernel/softirq.c b/kernel/softirq.c index 75aab25..730a5c9 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -197,6 +197,16 @@ void __local_bh_enable_ip(unsigned long ip, unsigned int cnt) } EXPORT_SYMBOL(__local_bh_enable_ip); +void local_bh_disable_all(void) +{ + local_bh_disable(); +} + +void local_bh_enable_all(void) +{ + local_bh_enable(); +} + /* * We restart softirq processing for at most MAX_SOFTIRQ_RESTART times, * but break the loop if need_resched() is set or after 2 ms. -- 2.7.4
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