The patch titled
genirq: Add reentrancy warning messages
has been added to the -mm tree. Its filename is
genirq-add-irq-chip-support-add-reentrancy-warning-messages.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: genirq: Add reentrancy warning messages
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
The simple and level irq handlers prevent reentrancy. For those irq types
reentrancy should not happen. Instead of silently going back omit a
warning message. Also do not reenable the interrupt in that case.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/irq/chip.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff -puN kernel/irq/chip.c~genirq-add-irq-chip-support-add-reentrancy-warning-messages kernel/irq/chip.c
--- a/kernel/irq/chip.c~genirq-add-irq-chip-support-add-reentrancy-warning-messages
+++ a/kernel/irq/chip.c
@@ -208,8 +208,11 @@ handle_simple_irq(unsigned int irq, stru
spin_lock(&desc->lock);
- if (unlikely(desc->status & IRQ_INPROGRESS))
+ if (unlikely(desc->status & IRQ_INPROGRESS)) {
+ printk(KERN_ERR "handle_simple_irq reentered while "
+ "processing irq %d\n", irq);
goto out_unlock;
+ }
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
kstat_cpu(cpu).irqs[irq]++;
@@ -251,8 +254,11 @@ handle_level_irq(unsigned int irq, struc
spin_lock(&desc->lock);
mask_ack_irq(desc, irq);
- if (unlikely(desc->status & IRQ_INPROGRESS))
+ if (unlikely(desc->status & IRQ_INPROGRESS)) {
+ printk(KERN_ERR "handle_level_irq reentered while "
+ "processing irq %d\n", irq);
goto out;
+ }
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
kstat_cpu(cpu).irqs[irq]++;
@@ -273,9 +279,9 @@ handle_level_irq(unsigned int irq, struc
spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
-out:
if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
desc->chip->unmask(irq);
+out:
spin_unlock(&desc->lock);
}
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
git-mtd.patch
pi-futex-futex-code-cleanups.patch
pi-futex-introduce-debug_check_no_locks_freed.patch
pi-futex-add-plist-implementation.patch
pi-futex-scheduler-support-for-pi.patch
pi-futex-rt-mutex-core.patch
pi-futex-rt-mutex-docs.patch
pi-futex-rt-mutex-debug.patch
pi-futex-rt-mutex-tester.patch
pi-futex-rt-mutex-futex-api.patch
pi-futex-futex_lock_pi-futex_unlock_pi-support.patch
fix-rt-mutex-defaults-and-dependencies.patch
futex_requeue-optimization.patch
genirq-rename-desc-handler-to-desc-chip.patch
genirq-sem2mutex-probe_sem-probing_active.patch
genirq-cleanup-merge-irq_affinity-into-irq_desc.patch
genirq-cleanup-remove-irq_descp.patch
genirq-cleanup-remove-fastcall.patch
genirq-cleanup-misc-code-cleanups.patch
genirq-cleanup-reduce-irq_desc_t-use-mark-it-obsolete.patch
genirq-cleanup-include-linux-irqh.patch
genirq-cleanup-merge-irq_dir-smp_affinity_entry-into-irq_desc.patch
genirq-cleanup-merge-pending_irq_cpumask-into-irq_desc.patch
genirq-cleanup-turn-arch_has_irq_per_cpu-into-config_irq_per_cpu.patch
genirq-debug-better-debug-printout-in-enable_irq.patch
genirq-add-retrigger-irq-op-to-consolidate-hw_irq_resend.patch
genirq-doc-comment-include-linux-irqh-structures.patch
genirq-doc-handle_irq_event-and-__do_irq-comments.patch
genirq-cleanup-no_irq_type-cleanups.patch
genirq-doc-add-design-documentation.patch
genirq-add-genirq-sw-irq-retrigger.patch
genirq-add-irq_noprobe-support.patch
genirq-add-irq_norequest-support.patch
genirq-add-irq_noautoen-support.patch
genirq-update-copyrights.patch
genirq-core.patch
genirq-msi-fixes-2.patch
genirq-add-irq-chip-support.patch
genirq-add-irq-chip-support-fix.patch
genirq-add-irq-chip-support-add-reentrancy-warning-messages.patch
genirq-add-handle_bad_irq.patch
genirq-add-irq-wake-power-management-support.patch
genirq-add-sa_trigger-support.patch
genirq-convert-the-x86_64-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips.patch
genirq-convert-the-i386-architecture-to-irq-chips-fix-2.patch
genirq-more-verbose-debugging-on-unexpected-irq-vectors.patch
genirq-add-chip-eoi-fastack-fasteoi-fix.patch
genirq-allow-usage-of-no_irq_chip.patch
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