diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2006-10-04 02:16:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-04 07:55:28 -0700 |
| commit | e500f57436b9056a245216c53113613928155eba (patch) | |
| tree | 2b93aae3dfbe82fd5387ec7e0cb5945951655d07 /arch/x86_64/kernel/irq.c | |
| parent | 23d0b8b053391afe15c9667d80de77ca88e18b8b (diff) | |
[PATCH] genirq: x86_64 irq: Make the external irq handlers report their vector, not the irq number
This is a small pessimization but it paves the way for making this information
per cpu. Which allows the the maximum number of IRQS to become NR_CPUS*224.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/irq.c')
| -rw-r--r-- | arch/x86_64/kernel/irq.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c index 609f97153b8..4542fb03199 100644 --- a/arch/x86_64/kernel/irq.c +++ b/arch/x86_64/kernel/irq.c @@ -105,7 +105,12 @@ skip: asmlinkage unsigned int do_IRQ(struct pt_regs *regs) { /* high bit used in ret_from_ code */ - unsigned irq = ~regs->orig_rax; + unsigned vector = ~regs->orig_rax; + unsigned irq; + + exit_idle(); + irq_enter(); + irq = vector_irq[vector]; if (unlikely(irq >= NR_IRQS)) { printk(KERN_EMERG "%s: cannot handle IRQ %d\n", @@ -113,8 +118,6 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs) BUG(); } - exit_idle(); - irq_enter(); #ifdef CONFIG_DEBUG_STACKOVERFLOW stack_overflow_check(regs); #endif |