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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-16 14:33:20 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-16 16:05:15 -0400 |
| commit | cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159 (patch) | |
| tree | 804a98f6f928a5f27bf69f1b31f40d26867b78aa /arch/x86/xen/spinlock.c | |
| parent | ef35a4e6d9eef3bd904b8c6b85618a2e878e801e (diff) | |
| download | linux-stable-cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159.tar.gz linux-stable-cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159.tar.bz2 linux-stable-cb9c6f15f318aa3aeb62fe525aa5c6dcf6eee159.zip | |
xen/spinlock: Check against default value of -1 for IRQ line.
The default (uninitialized) value of the IRQ line is -1.
Check if we already have allocated an spinlock interrupt line
and if somebody is trying to do it again. Also set it to -1
when we offline the CPU.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/spinlock.c')
| -rw-r--r-- | arch/x86/xen/spinlock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index f7a080ef0354..47ae032f8d97 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -364,6 +364,9 @@ void __cpuinit xen_init_lock_cpu(int cpu) int irq; const char *name; + WARN(per_cpu(lock_kicker_irq, cpu) > 0, "spinlock on CPU%d exists on IRQ%d!\n", + cpu, per_cpu(lock_kicker_irq, cpu)); + name = kasprintf(GFP_KERNEL, "spinlock%d", cpu); irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR, cpu, @@ -383,6 +386,7 @@ void __cpuinit xen_init_lock_cpu(int cpu) void xen_uninit_lock_cpu(int cpu) { unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL); + per_cpu(lock_kicker_irq, cpu) = -1; } void __init xen_init_spinlocks(void) |