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

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Date:	Thu, 24 Sep 2015 14:07:40 +0800
From:	Minfei Huang <mnfhuang@...il.com>
To:	ebiederm@...ssion.com, akpm@...ux-foundation.org, bhe@...hat.com,
	dyoung@...hat.com
Cc:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Minfei Huang <mnfhuang@...il.com>
Subject: [PATCH V2] kexec: Use file name as the output message prefix

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@...il.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

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