linux-kernel - [PATCH] libata: reorder ata_device to remove 8 bytes of padding on 64 bits

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Message-Id: <1219326420.1276.8.camel@castor.localdomain>
Date:	Thu, 21 Aug 2008 14:47:00 +0100
From:	Richard Kennedy <richard@....demon.co.uk>
To:	jgarzik@...ox.com
Cc:	lkml <linux-kernel@...r.kernel.org>, linux-ide@...r.kernel.org
Subject: [PATCH] libata: reorder ata_device to remove 8 bytes of padding on
	64 bits

reduce size by 8 bytes from 1160 to 1152 allowing it to fit in 1 fewer
cachelines.
    
Signed-off-by: Richard Kennedy <richard@....demon.co.uk>

---
patch against 2.6.27-rc4 compiled & run on AMD64.

Richard


diff --git a/include/linux/libata.h b/include/linux/libata.h
index 06b8033..84a7a0d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -553,8 +553,8 @@ struct ata_ering {
 struct ata_device {
 	struct ata_link		*link;
 	unsigned int		devno;		/* 0 or 1 */
-	unsigned long		flags;		/* ATA_DFLAG_xxx */
 	unsigned int		horkage;	/* List of broken features */
+	unsigned long		flags;		/* ATA_DFLAG_xxx */
 	struct scsi_device	*sdev;		/* attached SCSI device */
 #ifdef CONFIG_ATA_ACPI
 	acpi_handle		acpi_handle;


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