Follow mingo's scheduling changes for x86.

arch/alpha/kernel/entry.S

@@ -489,10 +489,8 @@ alpha_switch_to:
 	.prologue 0
 	bsr	$1,do_switch_stack
 	call_pal PAL_swpctx
-	unop
-	bsr	$1,undo_switch_stack
 	lda	$8,0x3fff
-	mov	$17,$0
+	bsr	$1,undo_switch_stack
 	bic	$30,$8,$8
 	ret	$31,($26),1
 .end alpha_switch_to
@@ -503,7 +501,7 @@ alpha_switch_to:
 .ent ret_from_fork
 ret_from_fork:
 	lda	$26,ret_from_sys_call
-	mov	$0,$16
+	mov	$17,$16
 	jmp	$31,schedule_tail
 .end ret_from_fork
 #endif

include/asm-alpha/bitops.h

@@ -460,6 +460,27 @@ find_next_bit(void * addr, unsigned long size, unsigned long offset)
 
 #ifdef __KERNEL__
 
+/*
+ * Every architecture must define this function. It's the fastest
+ * way of searching a 140-bit bitmap where the first 100 bits are
+ * unlikely to be set. It's guaranteed that at least one of the 140
+ * bits is set.
+ */
+static inline unsigned long
+sched_find_first_bit(unsigned long b[3])
+{
+	unsigned long b0 = b[0], b1 = b[1], b2 = b[2];
+	unsigned long ofs;
+
+	ofs = (b1 ? 64 : 128);
+	b1 = (b1 ? b1 : b2);
+	ofs = (b0 ? 0 : ofs);
+	b0 = (b0 ? b0 : b1);
+
+	return __ffs(b0) + ofs;
+}
+
+
 #define ext2_set_bit                 __test_and_set_bit
 #define ext2_clear_bit               __test_and_clear_bit
 #define ext2_test_bit                test_bit

include/asm-alpha/mmu_context.h

@@ -21,28 +21,6 @@
 #include <asm/io.h>
 #endif
 
-/* ??? This does not belong here.  */
-/*
- * Every architecture must define this function. It's the fastest
- * way of searching a 140-bit bitmap where the first 100 bits are
- * unlikely to be set. It's guaranteed that at least one of the 140
- * bits is cleared.
- */
-
-static inline int
-sched_find_first_bit(unsigned long *b)
-{
-	unsigned long b0 = b[0], b1 = b[1], b2 = b[2];
-	unsigned long offset = 128;
-
-	if (unlikely(b0 | b1)) {
-		b2 = (b0 ? b0 : b1);
-		offset = (b0 ? 0 : 64);
-	}
-
-	return __ffs(b2) + offset;
-}
-
 
 extern inline unsigned long
 __reload_thread(struct pcb_struct *pcb)

include/asm-alpha/system.h

@@ -131,15 +131,13 @@ extern void halt(void) __attribute__((noreturn));
 #define __halt() __asm__ __volatile__ ("call_pal %0 #halt" : : "i" (PAL_halt))
 
 #define prepare_to_switch()	do { } while(0)
-#define switch_to(prev,next,last)			\
+#define switch_to(prev,next)						  \
 do {									  \
-	unsigned long pcbb;				\
-	pcbb = virt_to_phys(&(next)->thread_info->pcb);	\
-	(last) = alpha_switch_to(pcbb, (prev));		\
+	alpha_switch_to(virt_to_phys(&(next)->thread_info->pcb), (prev)); \
 	check_mmu_context();						  \
 } while (0)
 
-extern struct task_struct* alpha_switch_to(unsigned long, struct task_struct*);
+extern void alpha_switch_to(unsigned long, struct task_struct*);
 
 #define mb() \
 __asm__ __volatile__("mb": : :"memory")