X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;ds=sidebyside;f=kernel%2Fspinlock.c;h=4b082b5cac9eedfd7c31daef7e8dd02974eedbed;hb=0375ec5899a37e80af7be8e813548df3292325ff;hp=5cdd8065a3ce32f6cecadd5a99a59a8ebc937613;hpb=12679a2d7e3bfbdc7586e3e86d1ca90c46659363;p=~andy%2Flinux

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 5cdd8065a3c..4b082b5cac9 100644
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -34,6 +34,20 @@
 #else
 #define raw_read_can_lock(l)	read_can_lock(l)
 #define raw_write_can_lock(l)	write_can_lock(l)
+
+/*
+ * Some architectures can relax in favour of the CPU owning the lock.
+ */
+#ifndef arch_read_relax
+# define arch_read_relax(l)	cpu_relax()
+#endif
+#ifndef arch_write_relax
+# define arch_write_relax(l)	cpu_relax()
+#endif
+#ifndef arch_spin_relax
+# define arch_spin_relax(l)	cpu_relax()
+#endif
+
 /*
  * We build the __lock_function inlines here. They are too large for
  * inlining all over the place, but here is only one user per function