MIPS: irq: Allocate accurate order pages for irq stack (72faa7a7) · Commits · 戴 / test

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: ("MIPS: Introduce irq_stack") Cc: linux-mips@vger.kernel.org Cc: stable@vger.kernel.org # v4.11+

arch/mips/kernel/irq.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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,

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