linux-kernel - [PATCH 1/3] tools/liblockdep: add userspace version of READ

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Message-Id: <1455147212-2389-2-git-send-email-alfredoalvarezernandez@gmail.com>
Date:	Thu, 11 Feb 2016 00:33:30 +0100
From:	Alfredo Alvarez Fernandez <alfredoalvarezfernandez@...il.com>
To:	mingo@...hat.com, peterz@...radead.org, sasha.levin@...cle.com
Cc:	linux-kernel@...r.kernel.org,
	Alfredo Alvarez Fernandez <alfredoalvarezfernandez@...il.com>
Subject: [PATCH 1/3] tools/liblockdep: add userspace version of READ_ONCE

From: Alfredo Alvarez Fernandez <alfredoalvarezfernandez@...il.com>

This was added to the kernel code in 1658d35ead5d ("list: Use
READ_ONCE() when testing for empty lists")
There's nothing special we need to do about it in userspace.

Signed-off-by: Alfredo Alvarez Fernandez <alfredoalvarezfernandez@...il.com>
---
 tools/lib/lockdep/uinclude/linux/compiler.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/lockdep/uinclude/linux/compiler.h b/tools/lib/lockdep/uinclude/linux/compiler.h
index 6386dc3..fd3e56a 100644
--- a/tools/lib/lockdep/uinclude/linux/compiler.h
+++ b/tools/lib/lockdep/uinclude/linux/compiler.h
@@ -3,6 +3,7 @@
 
 #define __used		__attribute__((__unused__))
 #define unlikely
+#define READ_ONCE(x) (x)
 #define WRITE_ONCE(x, val) x=(val)
 #define RCU_INIT_POINTER(p, v) p=(v)
 
-- 
2.5.0