MIPS: Introduce irq_stack
authorMatt Redfearn <matt.redfearn@imgtec.com>
Mon, 19 Dec 2016 14:20:56 +0000 (14:20 +0000)
committerRalf Baechle <ralf@linux-mips.org>
Tue, 3 Jan 2017 15:34:34 +0000 (16:34 +0100)
commitfe8bd18ffea5327344d4ec2bf11f47951212abd0
tree928a7f758616975d5cc5b66512aa24939c3e9e3f
parentae2f5e5ed04a17c1aa1f0a3714c725e12c21d2a9
MIPS: Introduce irq_stack

Allocate a per-cpu irq stack for use within interrupt handlers.

Also add a utility function on_irq_stack to determine if a given stack
pointer is within the irq stack for that cpu.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Acked-by: Jason A. Donenfeld <jason@zx2c4.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14740/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/include/asm/irq.h
arch/mips/kernel/asm-offsets.c
arch/mips/kernel/irq.c