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authorFrederic Weisbecker <fweisbec@gmail.com>2013-09-05 15:49:45 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2013-10-01 12:53:25 +0200
commit7d65f4a6553203da6a22097821d151fbbe7e4956 (patch)
tree4ac4162ca37756530112c29e8dbf1d2568313d81 /kernel/softirq.c
parentded797547548a5b8e7b92383a41e4c0e6b0ecb7f (diff)
downloadlinux-7d65f4a6553203da6a22097821d151fbbe7e4956.tar.bz2
irq: Consolidate do_softirq() arch overriden implementations
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 <torvalds@linux-foundation.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@au1.ibm.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/softirq.c')
-rw-r--r--kernel/softirq.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/softirq.c b/kernel/softirq.c
index d7d498d8cc4f..26ee72725d29 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -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.
*/