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authorRusty Russell <rusty@rustcorp.com.au>2009-03-09 12:06:28 -0400
committerRusty Russell <rusty@rustcorp.com.au>2009-03-08 19:36:29 -0400
commit6db6a5f3ae2ca6b874b0fd97ae16fdc9b5cdd6cc (patch)
tree567ab7d3593f6ab63fecfb8c9797fb4efda67ea7 /arch/x86/lguest
parentcbd88c8e6f5cdb8d4b9af01df825305200240382 (diff)
lguest: fix for CONFIG_SPARSE_IRQ=y
Impact: remove lots of lguest boot WARN_ON() when CONFIG_SPARSE_IRQ=y We now need to call irq_to_desc_alloc_cpu() before set_irq_chip_and_handler_name(), but we can't do that from init_IRQ (no kmalloc available). So do it as we use interrupts instead. Also means we only alloc for irqs we use, which was the intent of CONFIG_SPARSE_IRQ anyway. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com>
Diffstat (limited to 'arch/x86/lguest')
-rw-r--r--arch/x86/lguest/boot.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index ba5c05e97f10..960a8d9c049c 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -594,19 +594,21 @@ static void __init lguest_init_IRQ(void)
594 /* Some systems map "vectors" to interrupts weirdly. Lguest has 594 /* Some systems map "vectors" to interrupts weirdly. Lguest has
595 * a straightforward 1 to 1 mapping, so force that here. */ 595 * a straightforward 1 to 1 mapping, so force that here. */
596 __get_cpu_var(vector_irq)[vector] = i; 596 __get_cpu_var(vector_irq)[vector] = i;
597 if (vector != SYSCALL_VECTOR) { 597 if (vector != SYSCALL_VECTOR)
598 set_intr_gate(vector, 598 set_intr_gate(vector, interrupt[i]);
599 interrupt[vector-FIRST_EXTERNAL_VECTOR]);
600 set_irq_chip_and_handler_name(i, &lguest_irq_controller,
601 handle_level_irq,
602 "level");
603 }
604 } 599 }
605 /* This call is required to set up for 4k stacks, where we have 600 /* This call is required to set up for 4k stacks, where we have
606 * separate stacks for hard and soft interrupts. */ 601 * separate stacks for hard and soft interrupts. */
607 irq_ctx_init(smp_processor_id()); 602 irq_ctx_init(smp_processor_id());
608} 603}
609 604
605void lguest_setup_irq(unsigned int irq)
606{
607 irq_to_desc_alloc_cpu(irq, 0);
608 set_irq_chip_and_handler_name(irq, &lguest_irq_controller,
609 handle_level_irq, "level");
610}
611
610/* 612/*
611 * Time. 613 * Time.
612 * 614 *