[PATCH V2] kexec: Use file name as the output message prefix

[Minfei Huang <mnfhuang@gmail.com>]

kexec output message misses the prefix "kexec", when Dave Young split
the kexec code. Now, we use file name as the output message prefix.

Currectly, the format of output message:
[  140.290795] SYSC_kexec_load: hello, world
[  140.291534] kexec: sanity_check_segment_list: hello, world

Ideally, the format of output message:
[   30.791503] kexec: SYSC_kexec_load, Hello, world
[   79.182752] kexec_core: sanity_check_segment_list, Hello, world

Remove the custom prefix "kexec" in output message.

Signed-off-by: Minfei Huang <mnfhuang@gmail.com>
---
v2: Use KBUILD_MODNAME as prefix, instead of custom string "kexec"
---
 kernel/kexec.c      | 2 ++
 kernel/kexec_core.c | 4 ++--
 kernel/kexec_file.c | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 4c5edc3..df772fc 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -18,6 +18,8 @@
 
 #include "kexec_internal.h"
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 static int copy_user_segment_list(struct kimage *image,
 				  unsigned long nr_segments,
 				  struct kexec_segment __user *segments)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index 201b453..dd21c78 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -6,7 +6,7 @@
  * Version 2.  See the file COPYING for more details.
  */
 
-#define pr_fmt(fmt)	"kexec: " fmt
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/capability.h>
 #include <linux/mm.h>
@@ -1027,7 +1027,7 @@ static int __init crash_notes_memory_init(void)
 
 	crash_notes = __alloc_percpu(size, align);
 	if (!crash_notes) {
-		pr_warn("Kexec: Memory allocation for saving cpu register states failed\n");
+		pr_warn("Memory allocation for saving cpu register states failed\n");
 		return -ENOMEM;
 	}
 	return 0;
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 6a9a3f2..66a5dc8 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -22,6 +22,8 @@
 #include <linux/vmalloc.h>
 #include "kexec_internal.h"
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 /*
  * Declare these symbols weak so that if architecture provides a purgatory,
  * these will be overridden.
-- 
1.9.1