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authorAlfredo Alvarez Fernandez <alfredoalvarezfernandez@gmail.com>2016-02-19 09:48:51 +0300
committerIngo Molnar <mingo@kernel.org>2016-02-29 12:29:27 +0300
commit9d5a23ac8e0ede14a2b23740d231727ba5be483a (patch)
tree82ddd4196527b6d8d49ed2e63b762544efd08a2e /tools/lib/lockdep
parentb2ed0998f66c4f68d3cccd2558c627b194e30415 (diff)
downloadlinux-9d5a23ac8e0ede14a2b23740d231727ba5be483a.tar.xz
tools/lib/lockdep: Add userspace version of READ_ONCE()
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>
Diffstat (limited to 'tools/lib/lockdep')
-rw-r--r--tools/lib/lockdep/uinclude/linux/compiler.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/lockdep/uinclude/linux/compiler.h b/tools/lib/lockdep/uinclude/linux/compiler.h
index 6386dc3182a0..fd3e56a83fc2 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)