linux-kernel - [Patch v2] livepatch: annotate klp_init() with _

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Message-Id: <1432304789-6324-1-git-send-email-mnfhuang@gmail.com>
Date:	Fri, 22 May 2015 22:26:29 +0800
From:	Minfei Huang <mnfhuang@...il.com>
To:	jpoimboe@...hat.com, sjenning@...hat.com, jkosina@...e.cz,
	vojtech@...e.cz
Cc:	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
	mhuang@...hat.com, Minfei Huang <mnfhuang@...il.com>
Subject: [Patch v2] livepatch: annotate klp_init() with __init

Usually we prefer to let compiler put the module initialized function to
section ".init.text". Thus this text in memory will be freed in future.

Once we add the "__init" preceding function name, we can use following
command to find it in specfied section.

  $ objdump -t -j .init.text built-in.o

  built-in.o:     file format elf64-x86-64

  SYMBOL TABLE:
  0000000000000000 l    d  .init.text	0000000000000000 .init.text
  0000000000000000 l     F .init.text	000000000000004e klp_init

Signed-off-by: Minfei Huang <mnfhuang@...il.com>
---
v1:
- modify the subject to make it more concise
---
 kernel/livepatch/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 284e269..86e40b9 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -973,7 +973,7 @@ static struct notifier_block klp_module_nb = {
 	.priority = INT_MIN+1, /* called late but before ftrace notifier */
 };
 
-static int klp_init(void)
+static int __init klp_init(void)
 {
 	int ret;
 
-- 
2.2.2

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