x86-32: Align IRQ stacks properly
As suggested by Steven Rostedt we need to align the IRQ stacks to the
stack size, not just the page size to make them work for stack traces
and other things that depend on finding the stack slot itself with 8k
stacks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
LKML-Reference: <20100727121313.GA19976@lst.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 67f5f9f..3b5609f 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -55,7 +55,7 @@
union irq_ctx {
struct thread_info tinfo;
u32 stack[THREAD_SIZE/sizeof(u32)];
-} __attribute__((aligned(PAGE_SIZE)));
+} __attribute__((aligned(THREAD_SIZE)));
static DEFINE_PER_CPU(union irq_ctx *, hardirq_ctx);
static DEFINE_PER_CPU(union irq_ctx *, softirq_ctx);