linux-kernel - [PATCH 1/2] device.h: pack struct dev_links

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Message-Id: <20190226144108.25891-1-gregkh@linuxfoundation.org>
Date:   Tue, 26 Feb 2019 15:41:07 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 1/2] device.h: pack struct dev_links_info

The dev_links_info structure has 4 bytes of padding at the end of it
when embedded in struct device (which is the only place it lives).  To
help reduce the size of struct device pack this structure so we can take
advantage of the hole with later structure reorganizations.

Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 include/linux/device.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index 6cb4640b6160..b63165276a09 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -884,7 +884,7 @@ struct dev_links_info {
 	struct list_head suppliers;
 	struct list_head consumers;
 	enum dl_dev_state status;
-};
+} __packed;
 
 /**
  * struct device - The basic device structure
-- 
2.21.0