There are some common codes for stack checking, so factors it out into
the function on_stack() and on_valid_stack().
No functional change.
Signed-off-by: Yunfeng Ye <yeyunf...@huawei.com>
---
arch/arm64/include/asm/stacktrace.h | 53 +++++++++++++++++--------------------
arch/arm64/kernel/sdei.c | 28 ++------------------
2 files changed, 26 insertions(+), 55 deletions(-)
diff --git a/arch/arm64/include/asm/stacktrace.h
b/arch/arm64/include/asm/stacktrace.h
index fdb913cc0bcb..b92bef2fb6cd 100644
--- a/arch/arm64/include/asm/stacktrace.h
+++ b/arch/arm64/include/asm/stacktrace.h
@@ -69,27 +69,40 @@ extern void dump_backtrace(struct pt_regs *regs, struct
task_struct *tsk,
DECLARE_PER_CPU(unsigned long *, irq_stack_ptr);
-static inline bool on_irq_stack(unsigned long sp,
+static inline bool on_stack(unsigned long sp, unsigned long low,
+ unsigned long high, enum stack_type type,
struct stack_info *info)
{
- unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
- unsigned long high = low + IRQ_STACK_SIZE;
-
- if (!low)
- return false;
-
if (sp < low || sp >= high)
return false;
if (info) {
info->low = low;
info->high = high;
- info->type = STACK_TYPE_IRQ;
+ info->type = type;
}
-
return true;
}
+static inline bool on_valid_stack(unsigned long sp, unsigned long low,
+ unsigned long high, enum stack_type type,
+ struct stack_info *info)
+{
+ if (!low)
+ return false;
+
+ return on_stack(sp, low, high, type, info);
+}
+
+static inline bool on_irq_stack(unsigned long sp,
+ struct stack_info *info)
+{
+ unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
+ unsigned long high = low + IRQ_STACK_SIZE;
+
+ return on_valid_stack(sp, low, high, STACK_TYPE_IRQ, info);
+}
+
static inline bool on_task_stack(const struct task_struct *tsk,
unsigned long sp,
struct stack_info *info)
@@ -97,16 +110,7 @@ static inline bool on_task_stack(const struct task_struct
*tsk,
unsigned long low = (unsigned long)task_stack_page(tsk);
unsigned long high = low + THREAD_SIZE;
- if (sp < low || sp >= high)
- return false;
-
- if (info) {
- info->low = low;
- info->high = high;
- info->type = STACK_TYPE_TASK;
- }
-
- return true;
+ return on_stack(sp, low, high, STACK_TYPE_TASK, info);
}
#ifdef CONFIG_VMAP_STACK
@@ -118,16 +122,7 @@ static inline bool on_overflow_stack(unsigned long sp,
unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack);
unsigned long high = low + OVERFLOW_STACK_SIZE;
- if (sp < low || sp >= high)
- return false;
-
- if (info) {
- info->low = low;
- info->high = high;
- info->type = STACK_TYPE_OVERFLOW;
- }
-
- return true;
+ return on_stack(sp, low, high, STACK_TYPE_OVERFLOW, info);
}
#else
static inline bool on_overflow_stack(unsigned long sp,
diff --git a/arch/arm64/kernel/sdei.c b/arch/arm64/kernel/sdei.c
index d6259dac62b6..1758fcaa45dd 100644
--- a/arch/arm64/kernel/sdei.c
+++ b/arch/arm64/kernel/sdei.c
@@ -95,19 +95,7 @@ static bool on_sdei_normal_stack(unsigned long sp, struct
stack_info *info)
unsigned long low = (unsigned long)raw_cpu_read(sdei_stack_normal_ptr);
unsigned long high = low + SDEI_STACK_SIZE;
- if (!low)
- return false;
-
- if (sp < low || sp >= high)
- return false;
-
- if (info) {
- info->low = low;
- info->high = high;
- info->type = STACK_TYPE_SDEI_NORMAL;
- }
-
- return true;
+ return on_valid_stack(sp, low, high, STACK_TYPE_SDEI_NORMAL, info);
}
static bool on_sdei_critical_stack(unsigned long sp, struct stack_info *info)
@@ -115,19 +103,7 @@ static bool on_sdei_critical_stack(unsigned long sp,
struct stack_info *info)
unsigned long low = (unsigned
long)raw_cpu_read(sdei_stack_critical_ptr);
unsigned long high = low + SDEI_STACK_SIZE;
- if (!low)
- return false;
-
- if (sp < low || sp >= high)
- return false;
-
- if (info) {
- info->low = low;
- info->high = high;
- info->type = STACK_TYPE_SDEI_CRITICAL;
- }
-
- return true;
+ return on_valid_stack(sp, low, high, STACK_TYPE_SDEI_CRITICAL, info);
}
bool _on_sdei_stack(unsigned long sp, struct stack_info *info)
--
1.8.3.1
