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x86/irq/32: Make irq stack a character array

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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 <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Pingfan Liu <kernelfans@gmail.com>
Cc: Pu Wen <puwen@hygon.cn>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190414160145.736241969@linutronix.de
This commit is contained in:
Thomas Gleixner 2019-04-14 18:00:00 +02:00 committed by Borislav Petkov
parent aa641c287b
commit 231c4846b1
1 changed files with 1 additions and 1 deletions
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arch/x86/include/asm/processor.h
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@ -422,7 +422,7 @@ DECLARE_PER_CPU_ALIGNED(struct stack_canary, stack_canary);
* 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);