diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2008-11-07 13:18:30 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-09 22:23:49 +0100 |
| commit | f6d87f4bd259cf33e092cd1a8fde05f291c47af1 (patch) | |
| tree | abaa66af3c80fb18a20004b8d97261c680551792 /kernel/irq/internals.h | |
| parent | Merge branch 'for-2.6.28' of git://linux-nfs.org/~bfields/linux (diff) | |
| download | linux-f6d87f4bd259cf33e092cd1a8fde05f291c47af1.tar.xz linux-f6d87f4bd259cf33e092cd1a8fde05f291c47af1.zip | |
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.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index c9767e641980..64c1c7253dae 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: */ |