kdb: break out of kdb_ll() when command is terminated

[firefly-linux-kernel-4.4.55.git] / kernel / printk.c

diff --git a/kernel/printk.c b/kernel/printk.c
index 9213b8b5bb4fe4affb913b40d48b0e2c2af0d0e2..444b770c95959261a491b8a673ff42e29a181592 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -33,6 +33,7 @@
 #include <linux/bootmem.h>
 #include <linux/syscalls.h>
 #include <linux/kexec.h>
+#include <linux/kdb.h>
 #include <linux/ratelimit.h>
 #include <linux/kmsg_dump.h>
 #include <linux/syslog.h>
@@ -602,6 +603,14 @@ asmlinkage int printk(const char *fmt, ...)
        va_list args;
        int r;
 
+#ifdef CONFIG_KGDB_KDB
+       if (unlikely(kdb_trap_printk)) {
+               va_start(args, fmt);
+               r = vkdb_printf(fmt, args);
+               va_end(args);
+               return r;
+       }
+#endif
        va_start(args, fmt);
        r = vprintk(fmt, args);
        va_end(args);