4.20-stable review patch. If anyone has any objections, please let me know.
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From: Liu Xiang liu.xiang6@zte.com.cn
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
--- arch/mips/kernel/irq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- 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,