From: Anton Vorontsov Date: Sat, 21 Jul 2012 00:28:25 +0000 (-0700) Subject: kdb: Switch to nolock variants of kmsg_dump functions X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c064da47144b11be4697a4611f640086a663016a;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: Linus Torvalds --- 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;