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>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index df17c935d3c6..1f91413edb87 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2072,8 +2072,8 @@ static int kdb_dmesg(int argc, const char **argv)
                 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 @@ static int kdb_dmesg(int argc, const char **argv)
         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;