[patch V2 22/29] x86/irq/32: Make irq stack a character array

[Thomas Gleixner]

There is no reason to have an u32 array in struct irq_stack. The only
purpose of the array is to size the struct properly.

Preparatory change for sharing struct irq_stack with 64-bit.

Signed-off-by: Thomas Gleixner <t...@linutronix.de>
---
 arch/x86/include/asm/processor.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -422,7 +422,7 @@ DECLARE_PER_CPU_ALIGNED(struct stack_can
  * per-CPU IRQ handling stacks
  */
 struct irq_stack {
-       u32                     stack[IRQ_STACK_SIZE / sizeof(u32)];
+       char                    stack[IRQ_STACK_SIZE];
 } __aligned(IRQ_STACK_SIZE);
 
 DECLARE_PER_CPU(struct irq_stack *, hardirq_stack);