})
/*
- * This is a type: either unsigned long, if the argument fits into
- * that type, or otherwise unsigned long long.
+ * This is the smallest unsigned integer type that can fit a value
+ * (up to 'long long')
*/
-#define __inttype(x) \
-__typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
+#define __inttype(x) __typeof__( \
+ __typefits(x,char, \
+ __typefits(x,short, \
+ __typefits(x,int, \
+ __typefits(x,long,0ULL)))))
+
+#define __typefits(x,type,not) \
+ __builtin_choose_expr(sizeof(x)<=sizeof(type),(unsigned type)0,not)
/**
* get_user - Get a simple variable from user space.
#else
#define __get_user_asm_u64(x, ptr, retval) \
- __get_user_asm(x, ptr, retval, "q", "", "=r")
+ __get_user_asm(x, ptr, retval, "q", "=r")
#endif
#define __get_user_size(x, ptr, size, retval) \
__chk_user_ptr(ptr); \
switch (size) { \
case 1: \
- __get_user_asm(x, ptr, retval, "b", "b", "=q"); \
+ __get_user_asm(x, ptr, retval, "b", "=q"); \
break; \
case 2: \
- __get_user_asm(x, ptr, retval, "w", "w", "=r"); \
+ __get_user_asm(x, ptr, retval, "w", "=r"); \
break; \
case 4: \
- __get_user_asm(x, ptr, retval, "l", "k", "=r"); \
+ __get_user_asm(x, ptr, retval, "l", "=r"); \
break; \
case 8: \
__get_user_asm_u64(x, ptr, retval); \
} \
} while (0)
-#define __get_user_asm(x, addr, err, itype, rtype, ltype) \
+#define __get_user_asm(x, addr, err, itype, ltype) \
asm volatile("\n" \
- "1: mov"itype" %2,%"rtype"1\n" \
+ "1: mov"itype" %2,%1\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3: mov %3,%0\n" \
- " xor"itype" %"rtype"1,%"rtype"1\n" \
+ " xor"itype" %1,%1\n" \
" jmp 2b\n" \
".previous\n" \
_ASM_EXTABLE_UA(1b, 3b) \