a17ae4c3a6
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the arch/s390/kernel/ files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Stack trace management functions
|
|
*
|
|
* Copyright IBM Corp. 2006
|
|
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/debug.h>
|
|
#include <linux/stacktrace.h>
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/export.h>
|
|
|
|
static int __save_address(void *data, unsigned long address, int nosched)
|
|
{
|
|
struct stack_trace *trace = data;
|
|
|
|
if (nosched && in_sched_functions(address))
|
|
return 0;
|
|
if (trace->skip > 0) {
|
|
trace->skip--;
|
|
return 0;
|
|
}
|
|
if (trace->nr_entries < trace->max_entries) {
|
|
trace->entries[trace->nr_entries++] = address;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int save_address(void *data, unsigned long address, int reliable)
|
|
{
|
|
return __save_address(data, address, 0);
|
|
}
|
|
|
|
static int save_address_nosched(void *data, unsigned long address, int reliable)
|
|
{
|
|
return __save_address(data, address, 1);
|
|
}
|
|
|
|
void save_stack_trace(struct stack_trace *trace)
|
|
{
|
|
unsigned long sp;
|
|
|
|
sp = current_stack_pointer();
|
|
dump_trace(save_address, trace, NULL, sp);
|
|
if (trace->nr_entries < trace->max_entries)
|
|
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace);
|
|
|
|
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
|
|
{
|
|
unsigned long sp;
|
|
|
|
sp = tsk->thread.ksp;
|
|
if (tsk == current)
|
|
sp = current_stack_pointer();
|
|
dump_trace(save_address_nosched, trace, tsk, sp);
|
|
if (trace->nr_entries < trace->max_entries)
|
|
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
|
|
|
|
void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
|
|
{
|
|
unsigned long sp;
|
|
|
|
sp = kernel_stack_pointer(regs);
|
|
dump_trace(save_address, trace, NULL, sp);
|
|
if (trace->nr_entries < trace->max_entries)
|
|
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
|
}
|
|
EXPORT_SYMBOL_GPL(save_stack_trace_regs);
|