diff options
| author | Liu Xiang <liu.xiang6@zte.com.cn> | 2019-02-16 17:12:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-23 08:44:23 +0100 |
| commit | 5b98f0928666b8da3ff4a5fc412c55fb092e37d5 (patch) | |
| tree | 4b870eae2647f1b3930f313f9ddb4c1d9fda79c3 /arch | |
| parent | 0adb8a1d60b1949945f4bd16af3c04f4337045a9 (diff) | |
MIPS: irq: Allocate accurate order pages for irq stack
commit 72faa7a773ca59336f3c889e878de81445c5a85c upstream.
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+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -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 dc1180a8bfa1..66736397af9f 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); @@ -59,8 +60,7 @@ 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, |