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| author | Mark Rutland <mark.rutland@arm.com> | 2017-07-20 12:26:48 +0100 |
|---|---|---|
| committer | Mark Rutland <mark.rutland@arm.com> | 2017-08-15 18:35:14 +0100 |
| commit | f60ad4edcf07238a3d2646d65d8d217032452550 (patch) | |
| tree | 9fcaefe674ed52734edf1c7f5719e69c31ace93a /arch/arm64/include/asm/stacktrace.h | |
| parent | dbc9344a68e506f19f80a9affc8fe7023a9cdc4c (diff) | |
| download | linux-f60ad4edcf07238a3d2646d65d8d217032452550.tar.gz linux-f60ad4edcf07238a3d2646d65d8d217032452550.tar.bz2 linux-f60ad4edcf07238a3d2646d65d8d217032452550.zip | |
arm64: clean up irq stack definitions
Before we add yet another stack to the kernel, it would be nice to
ensure that we consistently organise stack definitions and related
helper functions.
This patch moves the basic IRQ stack defintions to <asm/memory.h> to
live with their task stack counterparts. Helpers used for unwinding are
moved into <asm/stacktrace.h>, where subsequent patches will add helpers
for other stacks. Includes are fixed up accordingly.
This patch is a pure refactoring -- there should be no functional
changes as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/stacktrace.h')
| -rw-r--r-- | arch/arm64/include/asm/stacktrace.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/stacktrace.h b/arch/arm64/include/asm/stacktrace.h index 3bebab378c72..000e24182a5c 100644 --- a/arch/arm64/include/asm/stacktrace.h +++ b/arch/arm64/include/asm/stacktrace.h @@ -16,7 +16,12 @@ #ifndef __ASM_STACKTRACE_H #define __ASM_STACKTRACE_H -struct task_struct; +#include <linux/percpu.h> +#include <linux/sched.h> +#include <linux/sched/task_stack.h> + +#include <asm/memory.h> +#include <asm/ptrace.h> struct stackframe { unsigned long fp; @@ -31,4 +36,22 @@ extern void walk_stackframe(struct task_struct *tsk, struct stackframe *frame, int (*fn)(struct stackframe *, void *), void *data); extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk); +DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); + +static inline bool on_irq_stack(unsigned long sp) +{ + unsigned long low = (unsigned long)raw_cpu_ptr(irq_stack); + unsigned long high = low + IRQ_STACK_SIZE; + + return (low <= sp && sp < high); +} + +static inline bool on_task_stack(struct task_struct *tsk, unsigned long sp) +{ + unsigned long low = (unsigned long)task_stack_page(tsk); + unsigned long high = low + THREAD_SIZE; + + return (low <= sp && sp < high); +} + #endif /* __ASM_STACKTRACE_H */ |