sparc: Increase portability of strncpy_from_user() implementation.
Hide details of maximum user address calculation in a new
asm/uaccess.h interface named user_addr_max().
Provide little-endian implementation in find_zero(), which should work
but can probably be improved.
Abstrace alignment check behind IS_UNALIGNED() macro.
Kill double-semicolon, noticed by David Howells.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/uaccess.h b/arch/sparc/include/asm/uaccess.h
index 42a28cfd..20c2acb 100644
--- a/arch/sparc/include/asm/uaccess.h
+++ b/arch/sparc/include/asm/uaccess.h
@@ -6,6 +6,9 @@
#include <asm/uaccess_32.h>
#endif
+#define user_addr_max() \
+ (segment_eq(get_fs(), USER_DS) ? STACK_TOP : ~0UL)
+
extern long strncpy_from_user(char *dest, const char __user *src, long count);
#endif