linux-kernel - [PATCH 1/1] checkpoint: define pid==0 as self-checkpoint

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Date:	Thu, 5 Mar 2009 11:49:51 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Oren Laadan <orenl@...columbia.edu>,
	Dave Hansen <haveblue@...ibm.com>
Cc:	Linux Containers <containers@...ts.osdl.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/1] checkpoint: define pid==0 as self-checkpoint

[ this is on top of Dave's version of Oren's patchset, i.e.
http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/daveh/linux-2.6-cr.git;a=shortlog;h=dave-v13.4 ]

Define pid=0 when calling sys_checkpoint as asking for
a self-checkpoint.

Signed-off-by: Serge E. Hallyn <serue@...ibm.com>
---
 checkpoint/sys.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/checkpoint/sys.c b/checkpoint/sys.c
index 4a51ed3..acc5121 100644
--- a/checkpoint/sys.c
+++ b/checkpoint/sys.c
@@ -224,6 +224,8 @@ asmlinkage long sys_checkpoint(pid_t pid, int fd, unsigned long flags)
 	if (flags)
 		return -EINVAL;
 
+	if (pid == 0)
+		pid = current->pid;
 	ctx = cr_ctx_alloc(fd, flags | CR_CTX_CKPT);
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
-- 
1.5.4.3

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