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authorThomas Gleixner <tglx@linutronix.de>2008-11-07 13:18:30 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-09 22:23:49 +0100
commitf6d87f4bd259cf33e092cd1a8fde05f291c47af1 (patch)
treeabaa66af3c80fb18a20004b8d97261c680551792 /kernel/irq/internals.h
parent8b805ef617cf0e02f6d18b891f8deb6246421b01 (diff)
genirq: keep affinities set from userspace across free/request_irq()
Impact: preserve user-modified affinities on interrupts Kumar Galak noticed that commit 18404756765c713a0be4eb1082920c04822ce588 (genirq: Expose default irq affinity mask (take 3)) overrides an already set affinity setting across a free / request_irq(). Happens e.g. with ifdown/ifup of a network device. Change the logic to mark the affinities as set and keep them intact. This also fixes the unlocked access to irq_desc in irq_select_affinity() when called from irq_affinity_proc_write() Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/internals.h')
-rw-r--r--kernel/irq/internals.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index c9767e64198..64c1c7253da 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -25,6 +25,8 @@ static inline void unregister_handler_proc(unsigned int irq,
struct irqaction *action) { }
#endif
+extern int irq_select_affinity_usr(unsigned int irq);
+
/*
* Debugging printout:
*/