Revert "block: improve queue_should_plug() by looking at IO depths"
[linux-2.6.git] / include / linux / stddef.h
1 #ifndef _LINUX_STDDEF_H
2 #define _LINUX_STDDEF_H
3
4 #include <linux/compiler.h>
5
6 #undef NULL
7 #if defined(__cplusplus)
8 #define NULL 0
9 #else
10 #define NULL ((void *)0)
11 #endif
12
13 #ifdef __KERNEL__
14
15 enum {
16         false   = 0,
17         true    = 1
18 };
19
20 #undef offsetof
21 #ifdef __compiler_offsetof
22 #define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
23 #else
24 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
25 #endif
26 #endif /* __KERNEL__ */
27
28 #endif