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tools/lib/lockdep: Add userspace version of READ_ONCE()

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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@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1455864533-7536-2-git-send-email-alfredoalvarezernandez@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Alfredo Alvarez Fernandez 2016-02-19 07:48:51 +01:00 committed by Ingo Molnar
parent b2ed0998f6
commit 9d5a23ac8e
1 changed files with 1 additions and 0 deletions
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1
tools/lib/lockdep/uinclude/linux/compiler.h
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@ -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)