powerpc: Make rwlocks endian safe
Our ppc64 spinlocks and rwlocks use a trick where a lock token and
the paca index are placed in the lock with a single store. Since we
are using two u16s they need adjusting for little endian.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 7c345b6..5f54a74 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -32,8 +32,12 @@
#ifdef CONFIG_PPC64
/* use 0x800000yy when locked, where yy == CPU number */
+#ifdef __BIG_ENDIAN__
#define LOCK_TOKEN (*(u32 *)(&get_paca()->lock_token))
#else
+#define LOCK_TOKEN (*(u32 *)(&get_paca()->paca_index))
+#endif
+#else
#define LOCK_TOKEN 1
#endif