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authorThomas Gleixner <tglx@linutronix.de>2010-03-25 20:06:55 -0400
committerThomas Gleixner <tglx@linutronix.de>2010-04-13 10:36:40 -0400
commit6932bf37bed45ce8ed531928b1b0f98162fe6df6 (patch)
tree3b7af6b49608cb8e3474bf6cb56f86e712466942 /kernel/irq/manage.c
parente58aa3d2d0cc01ad8d6f7f640a0670433f794922 (diff)
genirq: Remove IRQF_DISABLED from core code
Remove all code which is related to IRQF_DISABLED from the core kernel code. IRQF_DISABLED still exists as a flag, but becomes a NOOP and will be removed after a grace period. That way we can easily revert to the previous behaviour by just restoring the core code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Miller <davem@davemloft.net> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Linus Torvalds <torvalds@osdl.org> LKML-Reference: <20100326000405.991244690@linutronix.de>
Diffstat (limited to 'kernel/irq/manage.c')
-rw-r--r--kernel/irq/manage.c30
1 files changed, 0 insertions, 30 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 84f32278ff1f..444d5a81a209 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -757,16 +757,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
757 if (new->flags & IRQF_ONESHOT) 757 if (new->flags & IRQF_ONESHOT)
758 desc->status |= IRQ_ONESHOT; 758 desc->status |= IRQ_ONESHOT;
759 759
760 /*
761 * Force MSI interrupts to run with interrupts
762 * disabled. The multi vector cards can cause stack
763 * overflows due to nested interrupts when enough of
764 * them are directed to a core and fire at the same
765 * time.
766 */
767 if (desc->msi_desc)
768 new->flags |= IRQF_DISABLED;
769
770 if (!(desc->status & IRQ_NOAUTOEN)) { 760 if (!(desc->status & IRQ_NOAUTOEN)) {
771 desc->depth = 0; 761 desc->depth = 0;
772 desc->status &= ~IRQ_DISABLED; 762 desc->status &= ~IRQ_DISABLED;
@@ -1027,7 +1017,6 @@ EXPORT_SYMBOL(free_irq);
1027 * Flags: 1017 * Flags:
1028 * 1018 *
1029 * IRQF_SHARED Interrupt is shared 1019 * IRQF_SHARED Interrupt is shared
1030 * IRQF_DISABLED Disable local interrupts while processing
1031 * IRQF_SAMPLE_RANDOM The interrupt can be used for entropy 1020 * IRQF_SAMPLE_RANDOM The interrupt can be used for entropy
1032 * IRQF_TRIGGER_* Specify active edge(s) or level 1021 * IRQF_TRIGGER_* Specify active edge(s) or level
1033 * 1022 *
@@ -1041,25 +1030,6 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler,
1041 int retval; 1030 int retval;
1042 1031
1043 /* 1032 /*
1044 * handle_IRQ_event() always ignores IRQF_DISABLED except for
1045 * the _first_ irqaction (sigh). That can cause oopsing, but
1046 * the behavior is classified as "will not fix" so we need to
1047 * start nudging drivers away from using that idiom.
1048 */
1049 if ((irqflags & (IRQF_SHARED|IRQF_DISABLED)) ==
1050 (IRQF_SHARED|IRQF_DISABLED)) {
1051 pr_warning(
1052 "IRQ %d/%s: IRQF_DISABLED is not guaranteed on shared IRQs\n",
1053 irq, devname);
1054 }
1055
1056#ifdef CONFIG_LOCKDEP
1057 /*
1058 * Lockdep wants atomic interrupt handlers:
1059 */
1060 irqflags |= IRQF_DISABLED;
1061#endif
1062 /*
1063 * Sanity-check: shared interrupts must pass in a real dev-ID, 1033 * Sanity-check: shared interrupts must pass in a real dev-ID,
1064 * otherwise we'll have trouble later trying to figure out 1034 * otherwise we'll have trouble later trying to figure out
1065 * which interrupt is which (messes up the interrupt freeing 1035 * which interrupt is which (messes up the interrupt freeing