linux-kernel - [PATCH 1/4] fanotify: Shrink struct fanotify_event

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Date:	Mon, 22 Nov 2010 00:33:03 +0000
From:	Alexey Zaytsev <alexey.zaytsev@...il.com>
To:	Eric Paris <eparis@...hat.com>
Cc:	Scott Hassan <hassan@...funk.com>, Jan Kara <jack@...e.cz>,
	agruen@...bit.com, linux-kernel@...r.kernel.org,
	stefan@...ttcher.org, Al Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org,
	Tvrtko Ursulin <tvrtko.ursulin@...hos.com>
Subject: [PATCH 1/4] fanotify: Shrink struct fanotify_event_metadata by 32
 bits

And this saves additional 32 bits in the future

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@...il.com>
---
 include/linux/fanotify.h |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index 0f01214..9a7986f 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -86,10 +86,11 @@
 #define FANOTIFY_METADATA_VERSION	2
 
 struct fanotify_event_metadata {
-	__u32 event_len;
-	__u32 vers;
-	__aligned_u64 mask;
+	__u16 event_len;
+	__u8 vers;
+	__u8 reserved;
 	__s32 fd;
+	__aligned_u64 mask;
 	__s32 pid;
 };
 

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