linux-kernel - [PATCH 03/60] driver core: Rearrange struct device for better packing

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Date:	Tue,  6 Jan 2009 14:11:22 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Matthew Wilcox <matthew@....cx>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 03/60] driver core: Rearrange struct device for better packing

From: Matthew Wilcox <matthew@....cx>

This minor rearrangement saves 16 bytes from sizeof(struct device)
according to pahole.

Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 include/linux/device.h |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index 4a52005..4e14fad 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -373,9 +373,9 @@ struct device {
 
 	struct kobject kobj;
 	char	bus_id[BUS_ID_SIZE];	/* position on parent bus */
+	unsigned		uevent_suppress:1;
 	const char		*init_name; /* initial name of the device */
 	struct device_type	*type;
-	unsigned		uevent_suppress:1;
 
 	struct semaphore	sem;	/* semaphore to synchronize calls to
 					 * its driver.
@@ -408,12 +408,13 @@ struct device {
 	/* arch specific additions */
 	struct dev_archdata	archdata;
 
+	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
+
 	spinlock_t		devres_lock;
 	struct list_head	devres_head;
 
 	struct klist_node	knode_class;
 	struct class		*class;
-	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
 	struct attribute_group	**groups;	/* optional groups */
 
 	void	(*release)(struct device *dev);
-- 
1.6.0.4

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