[PATCH 2/3] fput: move ->f_next_put into a union with ->f_version

From	Oleg Nesterov <oleg@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 2/3] fput: move ->f_next_put into a union with ->f_version
Date	2015-09-08 19:20 +0200
Message-ID	<q6uIP-2hN-27@gated-at.bofh.it> (permalink)
References	<q6uIN-2hN-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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file->f_next_put can share the memory with file->f_version (I hope).

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 include/linux/fs.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3941b86..58faad6 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -860,8 +860,10 @@ struct file {
 	const struct cred	*f_cred;
 	struct file_ra_state	f_ra;
 
-	u64			f_version;
-	struct file		*f_next_put;
+	union {
+		u64		f_version;
+		struct file	*f_next_put;
+	};
 #ifdef CONFIG_SECURITY
 	void			*f_security;
 #endif
-- 
2.4.3

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[PATCH 0/3] task_work: restore fifo ordering guarantee Oleg Nesterov <oleg@redhat.com> - 2015-09-08 19:20 +0200
  [PATCH 1/3] fput: don't abuse task_work_add() when possible Oleg Nesterov <oleg@redhat.com> - 2015-09-08 19:20 +0200
  [PATCH 2/3] fput: move ->f_next_put into a union with ->f_version Oleg Nesterov <oleg@redhat.com> - 2015-09-08 19:20 +0200

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