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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
commit8dea78da5cee153b8af9c07a2745f6c55057fe12 (patch)
treea8f4d49d63b1ecc92f2fddceba0655b2472c5bd9 /include/linux/bug.h
parent406089d01562f1e2bf9f089fd7637009ebaad589 (diff)
Patched in Tegra support.
Diffstat (limited to 'include/linux/bug.h')
-rw-r--r--include/linux/bug.h69
1 files changed, 0 insertions, 69 deletions
diff --git a/include/linux/bug.h b/include/linux/bug.h
index b1cf40de847..d276b5510c8 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -11,75 +11,6 @@ enum bug_trap_type {
11 11
12struct pt_regs; 12struct pt_regs;
13 13
14#ifdef __CHECKER__
15#define BUILD_BUG_ON_NOT_POWER_OF_2(n)
16#define BUILD_BUG_ON_ZERO(e) (0)
17#define BUILD_BUG_ON_NULL(e) ((void*)0)
18#define BUILD_BUG_ON_INVALID(e) (0)
19#define BUILD_BUG_ON(condition)
20#define BUILD_BUG() (0)
21#else /* __CHECKER__ */
22
23/* Force a compilation error if a constant expression is not a power of 2 */
24#define BUILD_BUG_ON_NOT_POWER_OF_2(n) \
25 BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
26
27/* Force a compilation error if condition is true, but also produce a
28 result (of value 0 and type size_t), so the expression can be used
29 e.g. in a structure initializer (or where-ever else comma expressions
30 aren't permitted). */
31#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
32#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
33
34/*
35 * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the
36 * expression but avoids the generation of any code, even if that expression
37 * has side-effects.
38 */
39#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
40
41/**
42 * BUILD_BUG_ON - break compile if a condition is true.
43 * @condition: the condition which the compiler should know is false.
44 *
45 * If you have some code which relies on certain constants being equal, or
46 * other compile-time-evaluated condition, you should use BUILD_BUG_ON to
47 * detect if someone changes it.
48 *
49 * The implementation uses gcc's reluctance to create a negative array, but
50 * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments
51 * to inline functions). So as a fallback we use the optimizer; if it can't
52 * prove the condition is false, it will cause a link error on the undefined
53 * "__build_bug_on_failed". This error message can be harder to track down
54 * though, hence the two different methods.
55 */
56#ifndef __OPTIMIZE__
57#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
58#else
59extern int __build_bug_on_failed;
60#define BUILD_BUG_ON(condition) \
61 do { \
62 ((void)sizeof(char[1 - 2*!!(condition)])); \
63 if (condition) __build_bug_on_failed = 1; \
64 } while(0)
65#endif
66
67/**
68 * BUILD_BUG - break compile if used.
69 *
70 * If you have some code that you expect the compiler to eliminate at
71 * build time, you should use BUILD_BUG to detect if it is
72 * unexpectedly used.
73 */
74#define BUILD_BUG() \
75 do { \
76 extern void __build_bug_failed(void) \
77 __linktime_error("BUILD_BUG failed"); \
78 __build_bug_failed(); \
79 } while (0)
80
81#endif /* __CHECKER__ */
82
83#ifdef CONFIG_GENERIC_BUG 14#ifdef CONFIG_GENERIC_BUG
84#include <asm-generic/bug.h> 15#include <asm-generic/bug.h>
85 16