score: switch to generic sys_execve()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/score/include/asm/syscalls.h

@@ -2,7 +2,6 @@
 #define _ASM_SCORE_SYSCALLS_H
 
 asmlinkage long score_clone(struct pt_regs *regs);
-asmlinkage long score_execve(struct pt_regs *regs);
 asmlinkage long score_sigaltstack(struct pt_regs *regs);
 asmlinkage long score_rt_sigreturn(struct pt_regs *regs);
 

arch/score/include/asm/unistd.h

@@ -4,5 +4,6 @@
 #define __ARCH_WANT_SYSCALL_NO_FLAGS
 #define __ARCH_WANT_SYSCALL_OFF_T
 #define __ARCH_WANT_SYSCALL_DEPRECATED
+#define __ARCH_WANT_SYS_EXECVE
 
 #include <asm-generic/unistd.h>

arch/score/kernel/entry.S

@@ -487,11 +487,6 @@ illegal_syscall:
 	sw	r9, [r0, PT_R7]
 	j	syscall_return
 
-ENTRY(sys_execve)
-	mv	r4, r0
-	la	r8, score_execve
-	br	r8
-
 ENTRY(sys_clone)
 	mv	r4, r0
 	la	r8, score_clone

arch/score/kernel/sys_score.c

@@ -83,27 +83,3 @@ score_vfork(struct pt_regs *regs)
 	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
 			regs->regs[0], regs, 0, NULL, NULL);
 }
-
-/*
- * sys_execve() executes a new program.
- * This is called indirectly via a small wrapper
- */
-asmlinkage long
-score_execve(struct pt_regs *regs)
-{
-	int error;
-	struct filename *filename;
-
-	filename = getname((char __user*)regs->regs[4]);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		return error;
-
-	error = do_execve(filename->name,
-			  (const char __user *const __user *)regs->regs[5],
-			  (const char __user *const __user *)regs->regs[6],
-			  regs);
-
-	putname(filename);
-	return error;
-}