MIPS: Rewrite spinlocks to ticket locks.

Based on patch by Chad Reese of Cavium Networks.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/mips/include/asm/spinlock_types.h b/arch/mips/include/asm/spinlock_types.h
index ce26c5048b1..adeedaa116c 100644
--- a/arch/mips/include/asm/spinlock_types.h
+++ b/arch/mips/include/asm/spinlock_types.h
@@ -6,7 +6,12 @@
 #endif
 
 typedef struct {
-	volatile unsigned int lock;
+	/*
+	 * bits  0..13: serving_now
+	 * bits 14    : junk data
+	 * bits 15..28: ticket
+	 */
+	unsigned int lock;
 } raw_spinlock_t;
 
 #define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }