kdb: Switch to nolock variants of kmsg_dump functions
The locked variants are prone to deadlocks (suppose we got to the
debugger w/ the logbuf lock held), so let's switch to nolock variants.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index df17c93..1f91413 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2072,8 +2072,8 @@
kdb_set(2, setargs);
}
- kmsg_dump_rewind(&dumper);
- while (kmsg_dump_get_line(&dumper, 1, NULL, 0, NULL))
+ kmsg_dump_rewind_nolock(&dumper);
+ while (kmsg_dump_get_line_nolock(&dumper, 1, NULL, 0, NULL))
n++;
if (lines < 0) {
@@ -2105,8 +2105,8 @@
if (skip >= n || skip < 0)
return 0;
- kmsg_dump_rewind(&dumper);
- while (kmsg_dump_get_line(&dumper, 1, buf, sizeof(buf), &len)) {
+ kmsg_dump_rewind_nolock(&dumper);
+ while (kmsg_dump_get_line_nolock(&dumper, 1, buf, sizeof(buf), &len)) {
if (skip) {
skip--;
continue;