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-rw-r--r--arch/i386/kernel/stacktrace.c11
-rw-r--r--arch/s390/kernel/stacktrace.c17
-rw-r--r--arch/x86_64/kernel/stacktrace.c14
-rw-r--r--include/linux/stacktrace.h7
-rw-r--r--kernel/lockdep.c5
5 files changed, 24 insertions, 30 deletions
diff --git a/arch/i386/kernel/stacktrace.c b/arch/i386/kernel/stacktrace.c
index e62a037ab39..ae3c32a87ad 100644
--- a/arch/i386/kernel/stacktrace.c
+++ b/arch/i386/kernel/stacktrace.c
@@ -61,12 +61,8 @@ save_context_stack(struct stack_trace *trace, unsigned int skip,
/*
* Save stack-backtrace addresses into a stack_trace buffer.
- * If all_contexts is set, all contexts (hardirq, softirq and process)
- * are saved. If not set then only the current context is saved.
*/
-void save_stack_trace(struct stack_trace *trace,
- struct task_struct *task, int all_contexts,
- unsigned int skip)
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
{
unsigned long ebp;
unsigned long *stack = &ebp;
@@ -85,10 +81,9 @@ void save_stack_trace(struct stack_trace *trace,
struct thread_info *context = (struct thread_info *)
((unsigned long)stack & (~(THREAD_SIZE - 1)));
- ebp = save_context_stack(trace, skip, context, stack, ebp);
+ ebp = save_context_stack(trace, trace->skip, context, stack, ebp);
stack = (unsigned long *)context->previous_esp;
- if (!all_contexts || !stack ||
- trace->nr_entries >= trace->max_entries)
+ if (!stack || trace->nr_entries >= trace->max_entries)
break;
trace->entries[trace->nr_entries++] = ULONG_MAX;
if (trace->nr_entries >= trace->max_entries)
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index de83f38288d..d9428a0fc8f 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -59,9 +59,7 @@ static inline unsigned long save_context_stack(struct stack_trace *trace,
}
}
-void save_stack_trace(struct stack_trace *trace,
- struct task_struct *task, int all_contexts,
- unsigned int skip)
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
{
register unsigned long sp asm ("15");
unsigned long orig_sp;
@@ -69,22 +67,23 @@ void save_stack_trace(struct stack_trace *trace,
sp &= PSW_ADDR_INSN;
orig_sp = sp;
- sp = save_context_stack(trace, &skip, sp,
+ sp = save_context_stack(trace, &trace->skip, sp,
S390_lowcore.panic_stack - PAGE_SIZE,
S390_lowcore.panic_stack);
- if ((sp != orig_sp) && !all_contexts)
+ if ((sp != orig_sp) && !trace->all_contexts)
return;
- sp = save_context_stack(trace, &skip, sp,
+ sp = save_context_stack(trace, &trace->skip, sp,
S390_lowcore.async_stack - ASYNC_SIZE,
S390_lowcore.async_stack);
- if ((sp != orig_sp) && !all_contexts)
+ if ((sp != orig_sp) && !trace->all_contexts)
return;
if (task)
- save_context_stack(trace, &skip, sp,
+ save_context_stack(trace, &trace->skip, sp,
(unsigned long) task_stack_page(task),
(unsigned long) task_stack_page(task) + THREAD_SIZE);
else
- save_context_stack(trace, &skip, sp, S390_lowcore.thread_info,
+ save_context_stack(trace, &trace->skip, sp,
+ S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
return;
}
diff --git a/arch/x86_64/kernel/stacktrace.c b/arch/x86_64/kernel/stacktrace.c
index 32cf55eb9af..1c022af8fe1 100644
--- a/arch/x86_64/kernel/stacktrace.c
+++ b/arch/x86_64/kernel/stacktrace.c
@@ -109,9 +109,10 @@ out_restore:
* Save stack-backtrace addresses into a stack_trace buffer:
*/
static inline unsigned long
-save_context_stack(struct stack_trace *trace, unsigned int skip,
+save_context_stack(struct stack_trace *trace,
unsigned long stack, unsigned long stack_end)
{
+ int skip = trace->skip;
unsigned long addr;
#ifdef CONFIG_FRAME_POINTER
@@ -159,12 +160,8 @@ save_context_stack(struct stack_trace *trace, unsigned int skip,
/*
* Save stack-backtrace addresses into a stack_trace buffer.
- * If all_contexts is set, all contexts (hardirq, softirq and process)
- * are saved. If not set then only the current context is saved.
*/
-void save_stack_trace(struct stack_trace *trace,
- struct task_struct *task, int all_contexts,
- unsigned int skip)
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
{
unsigned long stack = (unsigned long)&stack;
int i, nr_stacks = 0, stacks_done[MAX_STACKS];
@@ -207,9 +204,8 @@ void save_stack_trace(struct stack_trace *trace,
return;
stacks_done[nr_stacks] = stack_end;
- stack = save_context_stack(trace, skip, stack, stack_end);
- if (!all_contexts || !stack ||
- trace->nr_entries >= trace->max_entries)
+ stack = save_context_stack(trace, stack, stack_end);
+ if (!stack || trace->nr_entries >= trace->max_entries)
return;
trace->entries[trace->nr_entries++] = ULONG_MAX;
if (trace->nr_entries >= trace->max_entries)
diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
index 9cc81e57222..50e2b01e517 100644
--- a/include/linux/stacktrace.h
+++ b/include/linux/stacktrace.h
@@ -5,15 +5,16 @@
struct stack_trace {
unsigned int nr_entries, max_entries;
unsigned long *entries;
+ int skip; /* input argument: How many entries to skip */
+ int all_contexts; /* input argument: if true do than one stack */
};
extern void save_stack_trace(struct stack_trace *trace,
- struct task_struct *task, int all_contexts,
- unsigned int skip);
+ struct task_struct *task);
extern void print_stack_trace(struct stack_trace *trace, int spaces);
#else
-# define save_stack_trace(trace, task, all, skip) do { } while (0)
+# define save_stack_trace(trace, task) do { } while (0)
# define print_stack_trace(trace) do { } while (0)
#endif
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 9bad1788451..900b4cb1a02 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -224,7 +224,10 @@ static int save_trace(struct stack_trace *trace)
trace->max_entries = MAX_STACK_TRACE_ENTRIES - nr_stack_trace_entries;
trace->entries = stack_trace + nr_stack_trace_entries;
- save_stack_trace(trace, NULL, 0, 3);
+ trace->skip = 3;
+ trace->all_contexts = 0;
+
+ save_stack_trace(trace, NULL);
trace->max_entries = trace->nr_entries;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 09:24:14 +0000