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| 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 /include | |
| parent | 8b805ef617cf0e02f6d18b891f8deb6246421b01 (diff) | |
| download | linux-stable-f6d87f4bd259cf33e092cd1a8fde05f291c47af1.tar.gz linux-stable-f6d87f4bd259cf33e092cd1a8fde05f291c47af1.tar.bz2 linux-stable-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 'include')
| -rw-r--r-- | include/linux/irq.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index d058c57be02d..36b186eb318b 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -63,7 +63,8 @@ typedef void (*irq_flow_handler_t)(unsigned int irq, #define IRQ_MOVE_PENDING 0x00200000 /* need to re-target IRQ destination */ #define IRQ_NO_BALANCING 0x00400000 /* IRQ is excluded from balancing */ #define IRQ_SPURIOUS_DISABLED 0x00800000 /* IRQ was disabled by the spurious trap */ -#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ +#define IRQ_MOVE_PCNTXT 0x01000000 /* IRQ migration from process context */ +#define IRQ_AFFINITY_SET 0x02000000 /* IRQ affinity was set from userspace*/ #ifdef CONFIG_IRQ_PER_CPU # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU) @@ -210,7 +211,6 @@ extern int setup_irq(unsigned int irq, struct irqaction *new); #ifdef CONFIG_GENERIC_PENDING_IRQ -void set_pending_irq(unsigned int irq, cpumask_t mask); void move_native_irq(int irq); void move_masked_irq(int irq); @@ -228,10 +228,6 @@ static inline void move_masked_irq(int irq) { } -static inline void set_pending_irq(unsigned int irq, cpumask_t mask) -{ -} - #endif /* CONFIG_GENERIC_PENDING_IRQ */ #else /* CONFIG_SMP */ |