PPC updates: call schedule_tail only on SMP, update sched_find_first_bit,

include <linux/binfmts.h> in signal.c.

arch/ppc/kernel/entry.S

@@ -277,7 +277,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 
 	.globl	ret_from_fork
 ret_from_fork:
+#ifdef CONFIG_SMP
 	bl	schedule_tail
+#endif
 	rlwinm	r3,r1,0,0,18
 	lwz	r3,TI_FLAGS(r3)
 	andi.	r0,r3,_TIF_SYSCALL_TRACE

arch/ppc/kernel/signal.c

@@ -30,6 +30,7 @@
 #include <linux/stddef.h>
 #include <linux/elf.h>
 #include <linux/tty.h>
+#include <linux/binfmts.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>

include/asm-ppc/mmu_context.h

@@ -10,10 +10,6 @@
 #include <asm/bitops.h>
 #include <asm/mmu.h>
 
-#if MAX_RT_PRIO != 128 || MAX_PRIO != 168
-# error update this function.
-#endif
-
 static inline int sched_find_first_bit(unsigned long *b)
 {
 	if (unlikely(b[0]))
@@ -22,11 +18,9 @@ static inline int sched_find_first_bit(unsigned long *b)
 		return __ffs(b[1]) + 32;
 	if (unlikely(b[2]))
 		return __ffs(b[2]) + 64;
-	if (unlikely(b[3]))
+	if (b[3])
 		return __ffs(b[3]) + 96;
-	if (b[4])
 	return __ffs(b[4]) + 128;
-	return __ffs(b[5]) + 32 + 128;
 }
 
 /*