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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-20 10:28:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-20 10:28:56 -0700 |
| commit | 0bbfcaff9b2a69c71a95e6902253487ab30cb498 (patch) | |
| tree | f422bbfb8ba57909bf6e43f1d560b3f056cc3c61 /arch | |
| parent | 5928a2b60cfdbad730f93696acab142d0b607280 (diff) | |
| parent | e04268b0effc0ceea366c50b3107baad9edadafa (diff) | |
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq/core changes for v3.4 from Ingo Molnar
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq: Remove paranoid warnons and bogus fixups
genirq: Flush the irq thread on synchronization
genirq: Get rid of unnecessary IRQTF_DIED flag
genirq: No need to check IRQTF_DIED before stopping a thread handler
genirq: Get rid of unnecessary irqaction field in task_struct
genirq: Fix incorrect check for forced IRQ thread handler
softirq: Reduce invoke_softirq() code duplication
genirq: Fix long-term regression in genirq irq_set_irq_type() handling
x86-32/irq: Don't switch to irq stack for a user-mode irq
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/irq_32.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 40fc86161d9..58b7f27cb3e 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -100,13 +100,8 @@ execute_on_irq_stack(int overflow, struct irq_desc *desc, int irq) irqctx->tinfo.task = curctx->tinfo.task; irqctx->tinfo.previous_esp = current_stack_pointer; - /* - * Copy the softirq bits in preempt_count so that the - * softirq checks work in the hardirq context. - */ - irqctx->tinfo.preempt_count = - (irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) | - (curctx->tinfo.preempt_count & SOFTIRQ_MASK); + /* Copy the preempt_count so that the [soft]irq checks work. */ + irqctx->tinfo.preempt_count = curctx->tinfo.preempt_count; if (unlikely(overflow)) call_on_stack(print_stack_overflow, isp); @@ -196,7 +191,7 @@ bool handle_irq(unsigned irq, struct pt_regs *regs) if (unlikely(!desc)) return false; - if (!execute_on_irq_stack(overflow, desc, irq)) { + if (user_mode_vm(regs) || !execute_on_irq_stack(overflow, desc, irq)) { if (unlikely(overflow)) print_stack_overflow(); desc->handle_irq(irq, desc); |