sh: switch to generic strncpy_from_user().
This kills off the special sh32/64 versions and adopts the generic
version. It should be possible to optimize this for SH-4A unaligned
loads, but this is a corner case that can be supported incrementally.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h
index 050f221..3df7eee 100644
--- a/arch/sh/include/asm/uaccess.h
+++ b/arch/sh/include/asm/uaccess.h
@@ -25,6 +25,8 @@
(__chk_user_ptr(addr), \
__access_ok((unsigned long __force)(addr), (size)))
+#define user_addr_max() (current_thread_info()->addr_limit.seg)
+
/*
* Uh, these should become the main single-value transfer routines ...
* They automatically use the right size if we just have the right
@@ -100,6 +102,8 @@
# include "uaccess_64.h"
#endif
+extern long strncpy_from_user(char *dest, const char __user *src, long count);
+
/* Generic arbitrary sized copy. */
/* Return the number of bytes NOT copied */
__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n);
@@ -137,37 +141,6 @@
__cl_size; \
})
-/**
- * strncpy_from_user: - Copy a NUL terminated string from userspace.
- * @dst: Destination address, in kernel space. This buffer must be at
- * least @count bytes long.
- * @src: Source address, in user space.
- * @count: Maximum number of bytes to copy, including the trailing NUL.
- *
- * Copies a NUL-terminated string from userspace to kernel space.
- *
- * On success, returns the length of the string (not including the trailing
- * NUL).
- *
- * If access to userspace fails, returns -EFAULT (some data may have been
- * copied).
- *
- * If @count is smaller than the length of the string, copies @count bytes
- * and returns @count.
- */
-#define strncpy_from_user(dest,src,count) \
-({ \
- unsigned long __sfu_src = (unsigned long)(src); \
- int __sfu_count = (int)(count); \
- long __sfu_res = -EFAULT; \
- \
- if (__access_ok(__sfu_src, __sfu_count)) \
- __sfu_res = __strncpy_from_user((unsigned long)(dest), \
- __sfu_src, __sfu_count); \
- \
- __sfu_res; \
-})
-
static inline unsigned long
copy_from_user(void *to, const void __user *from, unsigned long n)
{