patch-2.1.23 linux/include/asm-alpha/uaccess.h

• Lines: 42
• Date: Sun Jan 26 12:07:46 1997
• Orig file: v2.1.22/linux/include/asm-alpha/uaccess.h
• Orig date: Wed Jan 15 19:45:44 1997

diff -u --recursive --new-file v2.1.22/linux/include/asm-alpha/uaccess.h linux/include/asm-alpha/uaccess.h
@@ -71,6 +71,24 @@
   __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
 #define __get_user(x,ptr) \
   __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+  
+/*
+ * The "xxx_ret" versions return constant specified in third argument, if
+ * something bad happens. These macros can be optimized for the
+ * case of just returning from the function xxx_ret is used.
+ */
+
+#define put_user_ret(x,ptr,ret) ({ \
+if (put_user(x,ptr)) return ret; })
+
+#define get_user_ret(x,ptr,ret) ({ \
+if (get_user(x,ptr)) return ret; })
+
+#define __put_user_ret(x,ptr,ret) ({ \
+if (__put_user(x,ptr)) return ret; })
+
+#define __get_user_ret(x,ptr,ret) ({ \
+if (__get_user(x,ptr)) return ret; })
 
 /*
  * The "lda %1, 2b-1b(%0)" bits are magic to get the assembler to
@@ -353,6 +371,16 @@
 			: "$1","$2","$3","$4","$5","$28","memory");	    \
 	}								    \
 	__cu_len;							    \
+})
+
+#define copy_to_user_ret(to,from,n,retval) ({ \
+if (copy_to_user(to,from,n)) \
+	return retval; \
+})
+
+#define copy_from_user_ret(to,from,n,retval) ({ \
+if (copy_from_user(to,from,n)) \
+	return retval; \
 })
 
 extern void __clear_user(void);