diff options
| author | Liu Xiang <liu.xiang6@zte.com.cn> | 2019-02-16 17:12:24 +0800 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-02-19 12:45:01 -0800 |
| commit | 72faa7a773ca59336f3c889e878de81445c5a85c (patch) | |
| tree | 2d7240cb8daa56078451ea784820c90f9c9f5a16 | |
| parent | d411da06abbe4c7cad0cc16b509d10b43da783a8 (diff) | |
MIPS: irq: Allocate accurate order pages for irq stack
The irq_pages is the number of pages for irq stack, but not the
order which is needed by __get_free_pages().
We can use get_order() to calculate the accurate order.
Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: fe8bd18ffea5 ("MIPS: Introduce irq_stack")
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # v4.11+
| -rw-r--r-- | arch/mips/kernel/irq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c index ba150c755fcc..85b6c60f285d 100644 --- a/arch/mips/kernel/irq.c +++ b/arch/mips/kernel/irq.c @@ -52,6 +52,7 @@ asmlinkage void spurious_interrupt(void) void __init init_IRQ(void) { int i; + unsigned int order = get_order(IRQ_STACK_SIZE); for (i = 0; i < NR_IRQS; i++) irq_set_noprobe(i); @@ -62,8 +63,7 @@ void __init init_IRQ(void) arch_init_irq(); for_each_possible_cpu(i) { - int irq_pages = IRQ_STACK_SIZE / PAGE_SIZE; - void *s = (void *)__get_free_pages(GFP_KERNEL, irq_pages); + void *s = (void *)__get_free_pages(GFP_KERNEL, order); irq_stack[i] = s; pr_debug("CPU%d IRQ stack at 0x%p - 0x%p\n", i, |