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x86/irq/32: Make irq stack a character array
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
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@ -422,7 +422,7 @@ DECLARE_PER_CPU_ALIGNED(struct stack_canary, stack_canary);
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* per-CPU IRQ handling stacks
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*/
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struct irq_stack {
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u32 stack[IRQ_STACK_SIZE / sizeof(u32)];
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char stack[IRQ_STACK_SIZE];
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} __aligned(IRQ_STACK_SIZE);
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DECLARE_PER_CPU(struct irq_stack *, hardirq_stack);
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