asm-generic/uaccess.h: don't mess with __copy_{to,from}_user

only h8300 actually used those; might as well define them there.

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

2 files changed, 52 insertions, 1 deletions

diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild
index f14e4e6ccbde..757cdeb24e6e 100644
--- a/arch/h8300/include/asm/Kbuild
+++ b/arch/h8300/include/asm/Kbuild
@@ -69,7 +69,6 @@ generic-y += tlbflush.h
 generic-y += trace_clock.h
 generic-y += topology.h
 generic-y += types.h
-generic-y += uaccess.h
 generic-y += ucontext.h
 generic-y += unaligned.h
 generic-y += vga.h
diff --git a/arch/h8300/include/asm/uaccess.h b/arch/h8300/include/asm/uaccess.h
new file mode 100644
index 000000000000..c156a416a279
--- /dev/null
+++ b/arch/h8300/include/asm/uaccess.h
@@ -0,0 +1,52 @@
+#ifndef _ASM_UACCESS_H
+#define _ASM_UACCESS_H
+
+#include <linux/string.h>
+
+static inline __must_check long __copy_from_user(void *to,
+		const void __user * from, unsigned long n)
+{
+	if (__builtin_constant_p(n)) {
+		switch(n) {
+		case 1:
+			*(u8 *)to = *(u8 __force *)from;
+			return 0;
+		case 2:
+			*(u16 *)to = *(u16 __force *)from;
+			return 0;
+		case 4:
+			*(u32 *)to = *(u32 __force *)from;
+			return 0;
+		}
+	}
+
+	memcpy(to, (const void __force *)from, n);
+	return 0;
+}
+
+static inline __must_check long __copy_to_user(void __user *to,
+		const void *from, unsigned long n)
+{
+	if (__builtin_constant_p(n)) {
+		switch(n) {
+		case 1:
+			*(u8 __force *)to = *(u8 *)from;
+			return 0;
+		case 2:
+			*(u16 __force *)to = *(u16 *)from;
+			return 0;
+		case 4:
+			*(u32 __force *)to = *(u32 *)from;
+			return 0;
+		default:
+			break;
+		}
+	}
+
+	memcpy((void __force *)to, from, n);
+	return 0;
+}
+
+#include <asm-generic/uaccess.h>
+
+#endif