This allows to call gdbstub_exit without worrying if
- CONFIG_KGDB is enabled
- if an kgdb I/O driver is loaded
- if a gdb frontend is currently attached
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
include/linux/kgdb.h | 1 +
kernel/debug/gdbstub.c | 3 +++
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index fa39183..16410e2 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -306,6 +306,7 @@ extern atomic_t kgdb_active;
extern bool dbg_is_early;
extern void __init dbg_late_init(void);
#else /* ! CONFIG_KGDB */
+static inline void gdbstub_exit(int status) { }
#define in_dbg_master() (0)
#define dbg_late_init()
#endif /* ! CONFIG_KGDB */
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index c22d8c2..5d7ed0a 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -1111,6 +1111,9 @@ void gdbstub_exit(int status)
unsigned char checksum, ch, buffer[3];
int loop;
+ if (!dbg_io_ops || !kgdb_connected)
+ return;
+
buffer[0] = 'W';
buffer[1] = hex_asc_hi(status);
buffer[2] = hex_asc_lo(status);
--
1.7.3.4
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