[PATCH] sched: cleanup context switch locking

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-sparc64 / system.h

diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h
index fd12ca386f486047b141926aa41890f2d129d095..f9be2c5b4dc97360013fb5ddfe2d54c23aeaad90 100644 (file)
--- a/include/asm-sparc64/system.h
+++ b/include/asm-sparc64/system.h
@@ -139,19 +139,13 @@ extern void __flushw_user(void);
 #define flush_user_windows flushw_user
 #define flush_register_windows flushw_all
 
-#define prepare_arch_switch(rq, next)          \
-do {   spin_lock(&(next)->switch_lock);        \
-       spin_unlock(&(rq)->lock);               \
+/* Don't hold the runqueue lock over context switch */
+#define __ARCH_WANT_UNLOCKED_CTXSW
+#define prepare_arch_switch(next)              \
+do {                                           \
        flushw_all();                           \
 } while (0)
 
-#define finish_arch_switch(rq, prev)           \
-do {   spin_unlock_irq(&(prev)->switch_lock);  \
-} while (0)
-
-#define task_running(rq, p) \
-       ((rq)->curr == (p) || spin_is_locked(&(p)->switch_lock))
-
        /* See what happens when you design the chip correctly?
         *
         * We tell gcc we clobber all non-fixed-usage registers except