[patch V3 23/32] x86/irq/32: Define IRQ_STACK_SIZE

Thomas Gleixner
2019-04-14T16:04:06Z

On 32-bit IRQ_STACK_SIZE is the same as THREAD_SIZE.

To allow sharing struct irq_stack with 32-bit, define IRQ_STACK_SIZE for
32-bit and use of for struct irq_stack.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/page_32_types.h | 2 ++
arch/x86/include/asm/processor.h | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)

--- a/arch/x86/include/asm/page_32_types.h
+++ b/arch/x86/include/asm/page_32_types.h
@@ -22,6 +22,8 @@
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)

+#define IRQ_STACK_SIZE THREAD_SIZE
+
#define N_EXCEPTION_STACKS 1

#ifdef CONFIG_X86_PAE
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -422,8 +422,8 @@ DECLARE_PER_CPU_ALIGNED(struct stack_can
* per-CPU IRQ handling stacks
*/
struct irq_stack {
- u32 stack[THREAD_SIZE/sizeof(u32)];
-} __aligned(THREAD_SIZE);
+ u32 stack[IRQ_STACK_SIZE / sizeof(u32)];
+} __aligned(IRQ_STACK_SIZE);

DECLARE_PER_CPU(struct irq_stack *, hardirq_stack);
DECLARE_PER_CPU(struct irq_stack *, softirq_stack);