linux-kernel - [RFC][PATCH 10/11] add checkpoint/restart compile helper

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Message-Id: <20090305163912.3A8363E9@kernel>
Date:	Thu, 05 Mar 2009 08:39:12 -0800
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	containers <containers@...ts.linux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Oren Laadan <orenl@...columbia.edu>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>
Subject: [RFC][PATCH 10/11] add checkpoint/restart compile helper


This is to aid the compiler a little bit so that we
don't have to add as many #ifdefs.  Gets used in the
next patch.

Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com>
---

 linux-2.6.git-dave/include/linux/checkpoint.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff -puN include/linux/checkpoint.h~cr-compile-helper include/linux/checkpoint.h
--- linux-2.6.git/include/linux/checkpoint.h~cr-compile-helper	2009-03-05 08:37:04.000000000 -0800
+++ linux-2.6.git-dave/include/linux/checkpoint.h	2009-03-05 08:37:04.000000000 -0800
@@ -115,6 +115,10 @@ static inline void __files_deny_checkpoi
 
 int cr_explain_file(struct file *file, char *explain, int left);
 int cr_file_supported(struct file *file);
+static inline int cr_enabled(void)
+{
+	return 1;
+}
 
 #else /* !CONFIG_CHECKPOINT_RESTART */
 
@@ -128,6 +132,13 @@ static inline int cr_file_supported(stru
 {
 	return 0;
 }
+/*
+ * Use this when you can in lieu of an #ifdef
+ */
+static inline int cr_enabled(void)
+{
+	return 0;
+}
 
 #endif /* CONFIG_CHECKPOINT_RESTART */
 #endif /* _CHECKPOINT_CKPT_H_ */
_
--
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