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path: root/kernel/debug/kdb/kdb_bt.c
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Diffstat (limited to 'kernel/debug/kdb/kdb_bt.c')
-rw-r--r--kernel/debug/kdb/kdb_bt.c61
1 files changed, 34 insertions, 27 deletions
diff --git a/kernel/debug/kdb/kdb_bt.c b/kernel/debug/kdb/kdb_bt.c
index 120fc686c919..d9af139f9a31 100644
--- a/kernel/debug/kdb/kdb_bt.c
+++ b/kernel/debug/kdb/kdb_bt.c
@@ -101,6 +101,27 @@ kdb_bt1(struct task_struct *p, unsigned long mask, bool btaprompt)
return 0;
}
+static void
+kdb_bt_cpu(unsigned long cpu)
+{
+ struct task_struct *kdb_tsk;
+
+ if (cpu >= num_possible_cpus() || !cpu_online(cpu)) {
+ kdb_printf("WARNING: no process for cpu %ld\n", cpu);
+ return;
+ }
+
+ /* If a CPU failed to round up we could be here */
+ kdb_tsk = KDB_TSK(cpu);
+ if (!kdb_tsk) {
+ kdb_printf("WARNING: no task for cpu %ld\n", cpu);
+ return;
+ }
+
+ kdb_set_current_task(kdb_tsk);
+ kdb_bt1(kdb_tsk, ~0UL, false);
+}
+
int
kdb_bt(int argc, const char **argv)
{
@@ -161,7 +182,6 @@ kdb_bt(int argc, const char **argv)
} else if (strcmp(argv[0], "btc") == 0) {
unsigned long cpu = ~0;
struct task_struct *save_current_task = kdb_current_task;
- char buf[80];
if (argc > 1)
return KDB_ARGCOUNT;
if (argc == 1) {
@@ -169,35 +189,22 @@ kdb_bt(int argc, const char **argv)
if (diag)
return diag;
}
- /* Recursive use of kdb_parse, do not use argv after
- * this point */
- argv = NULL;
if (cpu != ~0) {
- if (cpu >= num_possible_cpus() || !cpu_online(cpu)) {
- kdb_printf("no process for cpu %ld\n", cpu);
- return 0;
- }
- sprintf(buf, "btt 0x%px\n", KDB_TSK(cpu));
- kdb_parse(buf);
- return 0;
- }
- kdb_printf("btc: cpu status: ");
- kdb_parse("cpu\n");
- for_each_online_cpu(cpu) {
- void *kdb_tsk = KDB_TSK(cpu);
-
- /* If a CPU failed to round up we could be here */
- if (!kdb_tsk) {
- kdb_printf("WARNING: no task for cpu %ld\n",
- cpu);
- continue;
+ kdb_bt_cpu(cpu);
+ } else {
+ /*
+ * Recursive use of kdb_parse, do not use argv after
+ * this point.
+ */
+ argv = NULL;
+ kdb_printf("btc: cpu status: ");
+ kdb_parse("cpu\n");
+ for_each_online_cpu(cpu) {
+ kdb_bt_cpu(cpu);
+ touch_nmi_watchdog();
}
-
- sprintf(buf, "btt 0x%px\n", kdb_tsk);
- kdb_parse(buf);
- touch_nmi_watchdog();
+ kdb_set_current_task(save_current_task);
}
- kdb_set_current_task(save_current_task);
return 0;
} else {
if (argc) {