diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-09-15 13:11:05 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-17 16:41:05 +0200 |
| commit | d7b6d709a76a4f4ef3108ac41e1b39eb80f5c084 (patch) | |
| tree | 2687f3d932a493f83edd908dc5e20127c3a43237 /arch/x86/kernel/irq_32.c | |
| parent | c063a217bc0726c2560138229de5673dbb253a02 (diff) | |
x86/percpu: Move irq_stack variables next to current_task
Further extend struct pcpu_hot with the hard and soft irq stack
pointers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111145.599170752@infradead.org
Diffstat (limited to 'arch/x86/kernel/irq_32.c')
| -rw-r--r-- | arch/x86/kernel/irq_32.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 01833ebf5e8e..dc1049c01f9b 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -52,9 +52,6 @@ static inline int check_stack_overflow(void) { return 0; } static inline void print_stack_overflow(void) { } #endif -DEFINE_PER_CPU(struct irq_stack *, hardirq_stack_ptr); -DEFINE_PER_CPU(struct irq_stack *, softirq_stack_ptr); - static void call_on_stack(void *func, void *stack) { asm volatile("xchgl %%ebx,%%esp \n" @@ -77,7 +74,7 @@ static inline int execute_on_irq_stack(int overflow, struct irq_desc *desc) u32 *isp, *prev_esp, arg1; curstk = (struct irq_stack *) current_stack(); - irqstk = __this_cpu_read(hardirq_stack_ptr); + irqstk = __this_cpu_read(pcpu_hot.hardirq_stack_ptr); /* * this is where we switch to the IRQ stack. However, if we are @@ -115,7 +112,7 @@ int irq_init_percpu_irqstack(unsigned int cpu) int node = cpu_to_node(cpu); struct page *ph, *ps; - if (per_cpu(hardirq_stack_ptr, cpu)) + if (per_cpu(pcpu_hot.hardirq_stack_ptr, cpu)) return 0; ph = alloc_pages_node(node, THREADINFO_GFP, THREAD_SIZE_ORDER); @@ -127,8 +124,8 @@ int irq_init_percpu_irqstack(unsigned int cpu) return -ENOMEM; } - per_cpu(hardirq_stack_ptr, cpu) = page_address(ph); - per_cpu(softirq_stack_ptr, cpu) = page_address(ps); + per_cpu(pcpu_hot.hardirq_stack_ptr, cpu) = page_address(ph); + per_cpu(pcpu_hot.softirq_stack_ptr, cpu) = page_address(ps); return 0; } @@ -138,7 +135,7 @@ void do_softirq_own_stack(void) struct irq_stack *irqstk; u32 *isp, *prev_esp; - irqstk = __this_cpu_read(softirq_stack_ptr); + irqstk = __this_cpu_read(pcpu_hot.softirq_stack_ptr); /* build the stack frame on the softirq stack */ isp = (u32 *) ((char *)irqstk + sizeof(*irqstk)); |