# HG changeset patch
# User Jeremy Fitzhardinge <jeremy@xensource.com>
# Date
1199317452 28800
# Node ID
f7e7db3facd9406545103164f9be8f9ba1a2b549
# Parent
4d9a413a0f4c1d98dbea704f0366457b5117045d
x86: add _AT() macro to conditionally cast
Define _AT(type, value) to conditionally cast a value when compiling C
code, but not when used in assembler.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* C code. Therefore we cannot annotate them always with
* 'UL' and other type specifiers unilaterally. We
* use the following macros to deal with this.
+ *
+ * Similarly, _AT() will cast an expression with a type in C, but
+ * leave it unchanged in asm.
*/
#ifdef __ASSEMBLY__
#define _AC(X,Y) X
+#define _AT(T,X) X
#else
#define __AC(X,Y) (X##Y)
#define _AC(X,Y) __AC(X,Y)
+#define _AT(T,X) ((T)(X))
#endif
#endif /* !(_LINUX_CONST_H) */