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[PATCH] x86: Some preparationary cleanup for stack trace 

- Remove unused all_contexts parameter
No caller used it
- Move skip argument into the structure (needed for
followon patches)

Cc: mingo@elte.hu

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:34 +02:00 committed by Andi Kleen
parent 4ea8a5d8b5
commit 5a1b3999d6
5 changed files with 24 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/i386/kernel/stacktrace.c
View File

@ -61,12 +61,8 @@ save_context_stack(struct stack_trace *trace, unsigned int skip,
/* /*
* Save stack-backtrace addresses into a stack_trace buffer. * 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, void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
struct task_struct *task, int all_contexts,
unsigned int skip)
{ {
unsigned long ebp; unsigned long ebp;
unsigned long *stack = &ebp; unsigned long *stack = &ebp;
@ -85,10 +81,9 @@ void save_stack_trace(struct stack_trace *trace,
struct thread_info *context = (struct thread_info *) struct thread_info *context = (struct thread_info *)
((unsigned long)stack & (~(THREAD_SIZE - 1))); ((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; stack = (unsigned long *)context->previous_esp;
if (!all_contexts || !stack || if (!stack || trace->nr_entries >= trace->max_entries)
trace->nr_entries >= trace->max_entries)
break; break;
trace->entries[trace->nr_entries++] = ULONG_MAX; trace->entries[trace->nr_entries++] = ULONG_MAX;
if (trace->nr_entries >= trace->max_entries) if (trace->nr_entries >= trace->max_entries)

17
arch/s390/kernel/stacktrace.c
View File

@ -59,9 +59,7 @@ static inline unsigned long save_context_stack(struct stack_trace *trace,
} }
} }
void save_stack_trace(struct stack_trace *trace, void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
struct task_struct *task, int all_contexts,
unsigned int skip)
{ {
register unsigned long sp asm ("15"); register unsigned long sp asm ("15");
unsigned long orig_sp; unsigned long orig_sp;
@ -69,22 +67,23 @@ void save_stack_trace(struct stack_trace *trace,
sp &= PSW_ADDR_INSN; sp &= PSW_ADDR_INSN;
orig_sp = sp; 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 - PAGE_SIZE,
S390_lowcore.panic_stack); S390_lowcore.panic_stack);
if ((sp != orig_sp) && !all_contexts) if ((sp != orig_sp) && !trace->all_contexts)
return; 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 - ASYNC_SIZE,
S390_lowcore.async_stack); S390_lowcore.async_stack);
if ((sp != orig_sp) && !all_contexts) if ((sp != orig_sp) && !trace->all_contexts)
return; return;
if (task) 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),
(unsigned long) task_stack_page(task) + THREAD_SIZE); (unsigned long) task_stack_page(task) + THREAD_SIZE);
else 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); S390_lowcore.thread_info + THREAD_SIZE);
return; return;
} }

14
arch/x86_64/kernel/stacktrace.c
View File

@ -109,9 +109,10 @@ out_restore:
* Save stack-backtrace addresses into a stack_trace buffer: * Save stack-backtrace addresses into a stack_trace buffer:
*/ */
static inline unsigned long 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) unsigned long stack, unsigned long stack_end)
{ {
int skip = trace->skip;
unsigned long addr; unsigned long addr;
#ifdef CONFIG_FRAME_POINTER #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. * 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, void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
struct task_struct *task, int all_contexts,
unsigned int skip)
{ {
unsigned long stack = (unsigned long)&stack; unsigned long stack = (unsigned long)&stack;
int i, nr_stacks = 0, stacks_done[MAX_STACKS]; int i, nr_stacks = 0, stacks_done[MAX_STACKS];
@ -207,9 +204,8 @@ void save_stack_trace(struct stack_trace *trace,
return; return;
stacks_done[nr_stacks] = stack_end; stacks_done[nr_stacks] = stack_end;
stack = save_context_stack(trace, skip, stack, stack_end); stack = save_context_stack(trace, stack, stack_end);
if (!all_contexts || !stack || if (!stack || trace->nr_entries >= trace->max_entries)
trace->nr_entries >= trace->max_entries)
return; return;
trace->entries[trace->nr_entries++] = ULONG_MAX; trace->entries[trace->nr_entries++] = ULONG_MAX;
if (trace->nr_entries >= trace->max_entries) if (trace->nr_entries >= trace->max_entries)

7
include/linux/stacktrace.h
View File

@ -5,15 +5,16 @@
struct stack_trace { struct stack_trace {
unsigned int nr_entries, max_entries; unsigned int nr_entries, max_entries;
unsigned long *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, extern void save_stack_trace(struct stack_trace *trace,
struct task_struct *task, int all_contexts, struct task_struct *task);
unsigned int skip);
extern void print_stack_trace(struct stack_trace *trace, int spaces); extern void print_stack_trace(struct stack_trace *trace, int spaces);
#else #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) # define print_stack_trace(trace) do { } while (0)
#endif #endif

5
kernel/lockdep.c
View File

@ -224,7 +224,10 @@ static int save_trace(struct stack_trace *trace)
trace->max_entries = MAX_STACK_TRACE_ENTRIES - nr_stack_trace_entries; trace->max_entries = MAX_STACK_TRACE_ENTRIES - nr_stack_trace_entries;
trace->entries = stack_trace + 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; trace->max_entries = trace->nr_entries;