linux-kernel - [RFC v16][PATCH 12/43] c/r: add generic '->checkpoint()' f

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Message-Id: <1243445589-32388-13-git-send-email-orenl@cs.columbia.edu>
Date:	Wed, 27 May 2009 13:32:38 -0400
From:	Oren Laadan <orenl@...columbia.edu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...l.org>,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-api@...r.kernel.org, Serge Hallyn <serue@...ibm.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Oren Laadan <orenl@...columbia.edu>
Subject: [RFC v16][PATCH 12/43] c/r: add generic '->checkpoint()' f_op to simple devices

* /dev/null
* /dev/zero
* /dev/random
* /dev/urandom

Signed-off-by: Oren Laadan <orenl@...columbia.edu>
---
 drivers/char/mem.c    |    2 ++
 drivers/char/random.c |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 8f05c38..bfde41f 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -797,6 +797,7 @@ static const struct file_operations null_fops = {
 	.read		= read_null,
 	.write		= write_null,
 	.splice_write	= splice_write_null,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 #ifdef CONFIG_DEVPORT
@@ -813,6 +814,7 @@ static const struct file_operations zero_fops = {
 	.read		= read_zero,
 	.write		= write_zero,
 	.mmap		= mmap_zero,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 /*
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 8c74448..211ca70 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1164,6 +1164,7 @@ const struct file_operations random_fops = {
 	.poll  = random_poll,
 	.unlocked_ioctl = random_ioctl,
 	.fasync = random_fasync,
+	.checkpoint = generic_file_checkpoint,
 };
 
 const struct file_operations urandom_fops = {
@@ -1171,6 +1172,7 @@ const struct file_operations urandom_fops = {
 	.write = random_write,
 	.unlocked_ioctl = random_ioctl,
 	.fasync = random_fasync,
+	.checkpoint = generic_file_checkpoint,
 };
 
 /***************************************************************
-- 
1.6.0.4

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