score: add address space annotations

Annotate the address space for pointers that are used
correctly with __user and __iomem, so that sparse
can better warn about incorrect casts.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 14 insertions, 12 deletions

diff --git a/arch/score/kernel/ptrace.c b/arch/score/kernel/ptrace.c
index 19911e3..1db876b 100644
--- a/arch/score/kernel/ptrace.c
+++ b/arch/score/kernel/ptrace.c
@@ -267,6 +267,7 @@ long
 arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
 	int ret;
+	unsigned long __user *datap = (void __user *)data;
 
 	switch (request) {
 	/* Read the word at location addr in the USER area.  */
@@ -316,7 +317,7 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			return -EIO;
 		}
 
-		ret = put_user(tmp, (unsigned long *) data);
+		ret = put_user(tmp, (unsigned int __user *) datap);
 		return ret;
 	}
 
@@ -355,11 +356,11 @@ arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	}
 
 	case PTRACE_GETREGS:
-		ret = ptrace_getregs(child, (void __user *)data);
+		ret = ptrace_getregs(child, (void __user *)datap);
 		break;
 
 	case PTRACE_SETREGS:
-		ret = ptrace_setregs(child, (void __user *)data);
+		ret = ptrace_setregs(child, (void __user *)datap);
 		break;
 
 	default:
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index 252f6d9..1634aaa 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -131,13 +131,13 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	if ((ka->sa.sa_flags & SA_ONSTACK) && (!on_sig_stack(sp)))
 		sp = current->sas_ss_sp + current->sas_ss_size;
 
-	return (void *)((sp - frame_size) & ~7);
+	return (void __user*)((sp - frame_size) & ~7);
 }
 
 int score_sigaltstack(struct pt_regs *regs)
 {
-	const stack_t *uss = (const stack_t *) regs->regs[4];
-	stack_t *uoss = (stack_t *) regs->regs[5];
+	const stack_t __user *uss = (const stack_t __user *) regs->regs[4];
+	stack_t __user *uoss = (stack_t __user *) regs->regs[5];
 	unsigned long usp = regs->regs[0];
 
 	return do_sigaltstack(uss, uoss, usp);
@@ -188,7 +188,7 @@ badframe:
 int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
 		int signr, sigset_t *set, siginfo_t *info)
 {
-	struct rt_sigframe *frame;
+	struct rt_sigframe __user *frame;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
@@ -209,7 +209,7 @@ int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
 	err |= copy_siginfo_to_user(&frame->rs_info, info);
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
 	err |= __put_user(0, &frame->rs_uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
+	err |= __put_user((void __user *)current->sas_ss_sp,
 				&frame->rs_uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->regs[0]),
 				&frame->rs_uc.uc_stack.ss_flags);
diff --git a/arch/score/kernel/sys_score.c b/arch/score/kernel/sys_score.c
index eb4d2d3..16ace29 100644
--- a/arch/score/kernel/sys_score.c
+++ b/arch/score/kernel/sys_score.c
@@ -87,18 +87,19 @@ int score_clone(struct pt_regs *regs)
  * sys_execve() executes a new program.
  * This is called indirectly via a small wrapper
  */
-int score_execve(struct pt_regs *regs)
+asmlinkage long
+score_execve(struct pt_regs *regs)
 {
 	int error;
 	char *filename;
 
-	filename = getname((char *) (long) regs->regs[4]);
+	filename = getname((char __user*)regs->regs[4]);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		return error;
 
-	error = do_execve(filename, (char **) (long) regs->regs[5],
-			  (char **) (long) regs->regs[6], regs);
+	error = do_execve(filename, (char __user *__user*)regs->regs[5],
+			  (char __user *__user *) regs->regs[6], regs);
 
 	putname(filename);
 	return error;