diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2016-11-03 20:23:05 (GMT) |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2017-05-27 03:16:13 (GMT) |
| commit | e16f529356b21a06ca4506590c8479d4e47fee61 (patch) | |
| tree | e8c1b752388e19b559d75425d64de474f9978ceb /arch/arm64/include | |
| parent | e3e1116623928c713232e6b4b53653dac095c960 (diff) | |
| download | linux-e16f529356b21a06ca4506590c8479d4e47fee61.tar.xz | |
arm64: factor out current_stack_pointer
We define current_stack_pointer in <asm/thread_info.h>, though other
files and header relying upon it do not have this necessary include, and
are thus fragile to changes in the header soup.
Subsequent patches will affect the header soup such that directly
including <asm/thread_info.h> may result in a circular header include in
some of these cases, so we can't simply include <asm/thread_info.h>.
Instead, factor current_thread_info into its own header, and have all
existing users include this explicitly.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit a9ea0017ebe8889dfa136cac2aa7ae0ee6915e1f)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/percpu.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/perf_event.h | 2 | ||||
| -rw-r--r-- | arch/arm64/include/asm/stack_pointer.h | 9 | ||||
| -rw-r--r-- | arch/arm64/include/asm/thread_info.h | 6 |
4 files changed, 14 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h index 4afb6fc..3bd498e 100644 --- a/arch/arm64/include/asm/percpu.h +++ b/arch/arm64/include/asm/percpu.h @@ -16,6 +16,8 @@ #ifndef __ASM_PERCPU_H #define __ASM_PERCPU_H +#include <asm/stack_pointer.h> + static inline void set_my_cpu_offset(unsigned long off) { asm volatile("msr tpidr_el1, %0" :: "r" (off) : "memory"); diff --git a/arch/arm64/include/asm/perf_event.h b/arch/arm64/include/asm/perf_event.h index 38b6a2b..8d5cbec 100644 --- a/arch/arm64/include/asm/perf_event.h +++ b/arch/arm64/include/asm/perf_event.h @@ -17,6 +17,8 @@ #ifndef __ASM_PERF_EVENT_H #define __ASM_PERF_EVENT_H +#include <asm/stack_pointer.h> + #define ARMV8_PMU_MAX_COUNTERS 32 #define ARMV8_PMU_COUNTER_MASK (ARMV8_PMU_MAX_COUNTERS - 1) diff --git a/arch/arm64/include/asm/stack_pointer.h b/arch/arm64/include/asm/stack_pointer.h new file mode 100644 index 0000000..ffcdf74 --- /dev/null +++ b/arch/arm64/include/asm/stack_pointer.h @@ -0,0 +1,9 @@ +#ifndef __ASM_STACK_POINTER_H +#define __ASM_STACK_POINTER_H + +/* + * how to get the current stack pointer from C + */ +register unsigned long current_stack_pointer asm ("sp"); + +#endif /* __ASM_STACK_POINTER_H */ diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 76a9559..3a4f85d 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -36,6 +36,7 @@ struct task_struct; +#include <asm/stack_pointer.h> #include <asm/types.h> typedef unsigned long mm_segment_t; @@ -62,11 +63,6 @@ struct thread_info { #define init_stack (init_thread_union.stack) /* - * how to get the current stack pointer from C - */ -register unsigned long current_stack_pointer asm ("sp"); - -/* * how to get the thread information struct from C */ static inline struct thread_info *current_thread_info(void) __attribute_const__; |