[PATCH] Handle new do_fork return value on v850

arch/v850/kernel/entry.S

@@ -554,11 +554,14 @@ END(ret_from_long_syscall)
 
 L_ENTRY(sys_fork_wrapper):
 #ifdef CONFIG_MMU
-	addi	SIGCHLD, r0, r6		// Arg 0: flags
+	addi	SIGCHLD, r0, r6		   // Arg 0: flags
 	ld.w	PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
-	movea	PTO, sp, r8		// Arg 2: parent context
-	mov	hilo(CSYM(fork_common)), r18// Where the real work gets done
-	br	save_extra_state_tramp	// Save state and go there
+	movea	PTO, sp, r8		   // Arg 2: parent context
+	mov	r0, r9			   // Arg 3/4/5: 0
+	st.w	r0, 16[sp]
+	st.w	r0, 20[sp]
+	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
+	br	save_extra_state_tramp	   // Save state and go there
 #else
 	// fork almost works, enough to trick you into looking elsewhere :-(
 	addi	-EINVAL, r0, r10
@@ -569,18 +572,24 @@ END(sys_fork_wrapper)
 L_ENTRY(sys_vfork_wrapper):
 	addi	CLONE_VFORK | CLONE_VM | SIGCHLD, r0, r6 // Arg 0: flags
 	ld.w	PTO+PT_GPR(GPR_SP)[sp], r7 // Arg 1: child SP (use parent's)
-	movea	PTO, sp, r8		// Arg 2: parent context
-	mov	hilo(CSYM(fork_common)), r18// Where the real work gets done
-	br	save_extra_state_tramp	// Save state and go there
+	movea	PTO, sp, r8		   // Arg 2: parent context
+	mov	r0, r9			   // Arg 3/4/5: 0
+	st.w	r0, 16[sp]
+	st.w	r0, 20[sp]
+	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
+	br	save_extra_state_tramp	   // Save state and go there
 END(sys_vfork_wrapper)
 
 L_ENTRY(sys_clone_wrapper):
-	ld.w	PTO+PT_GPR(GPR_SP)[sp], r19 // parent's stack pointer
-        cmp	r7, r0			// See if child SP arg (arg 1) is 0.
-	cmov	z, r19, r7, r7		// ... and use the parent's if so. 
-	movea	PTO, sp, r8		// Arg 2: parent context
-	mov	hilo(CSYM(fork_common)), r18// Where the real work gets done
-	br	save_extra_state_tramp	// Save state and go there
+	ld.w	PTO+PT_GPR(GPR_SP)[sp], r19// parent's stack pointer
+	cmp	r7, r0			   // See if child SP arg (arg 1) is 0.
+	cmov	z, r19, r7, r7		   // ... and use the parent's if so.
+	movea	PTO, sp, r8		   // Arg 2: parent context
+	mov	r0, r9			   // Arg 3/4/5: 0
+	st.w	r0, 16[sp]
+	st.w	r0, 20[sp]
+	mov	hilo(CSYM(do_fork)), r18   // Where the real work gets done
+	br	save_extra_state_tramp	   // Save state and go there
 END(sys_clone_wrapper)
 
 

arch/v850/kernel/process.c

@@ -200,14 +200,6 @@ int sys_execve (char *name, char **argv, char **envp, struct pt_regs *regs)
 	return error;
 }
 
-/* This is the common part of the various fork-like system calls (which
-   are in entry.S).  */
-int fork_common (int flags, unsigned long new_sp, struct pt_regs *regs)
-{
-	struct task_struct *p = do_fork (flags, new_sp, regs, 0, 0, 0);
-	return IS_ERR (p) ? PTR_ERR (p) : p->pid;
-}
-
 
 /*
  * These bracket the sleeping functions..