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irq: Consolidate do_softirq() arch overriden implementations

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All arch overriden implementations of do_softirq() share the following
common code: disable irqs (to avoid races with the pending check),
check if there are softirqs pending, then execute __do_softirq() on
a specific stack.

Consolidate the common parts such that archs only worry about the
stack switch.

Acked-by: Linus Torvalds <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: James Hogan <[email protected]>
Cc: James E.J. Bottomley <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Andrew Morton <[email protected]>
This commit is contained in:
Frederic Weisbecker 2013-09-05 15:49:45 +02:00
commit 7d65f4a655
11 changed files with 98 additions and 202 deletions
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8
kernel/softirq.c
View file

@ -29,7 +29,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/irq.h>
#include <asm/irq.h>
/*
- No shared variables, all the data are CPU local.
- If a softirq needs serialization, let it serialize itself
@ -283,7 +282,7 @@ restart:
tsk_restore_flags(current, old_flags, PF_MEMALLOC);
}
#ifndef __ARCH_HAS_DO_SOFTIRQ
asmlinkage void do_softirq(void)
{
@ -298,13 +297,12 @@ asmlinkage void do_softirq(void)
pending = local_softirq_pending();
if (pending)
__do_softirq();
do_softirq_own_stack();
WARN_ON_ONCE(softirq_count());
local_irq_restore(flags);
}
#endif
/*
* Enter an interrupt context.
*/