tree bf19931ed04b2c873b5f18704e18cb317a506994
parent 3001a9c2d9349cd4eef5043126a55a5365719034
author Liu Xiang <liu.xiang6@zte.com.cn> 1550308344 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1552511094 -0700

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>