1#ifndef __LINUX_COMPILER_TYPES_H
2#define __LINUX_COMPILER_TYPES_H
3
4#ifndef __ASSEMBLY__
5
6#ifdef __CHECKER__
7# define __user __attribute__((noderef, address_space(1)))
8# define __kernel __attribute__((address_space(0)))
9# define __safe __attribute__((safe))
10# define __force __attribute__((force))
11# define __nocast __attribute__((nocast))
12# define __iomem __attribute__((noderef, address_space(2)))
13# define __must_hold(x) __attribute__((context(x,1,1)))
14# define __acquires(x) __attribute__((context(x,0,1)))
15# define __releases(x) __attribute__((context(x,1,0)))
16# define __acquire(x) __context__(x,1)
17# define __release(x) __context__(x,-1)
18# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
19# define __percpu __attribute__((noderef, address_space(3)))
20# define __rcu __attribute__((noderef, address_space(4)))
21# define __private __attribute__((noderef))
22extern void __chk_user_ptr(const volatile void __user *);
23extern void __chk_io_ptr(const volatile void __iomem *);
24# define ACCESS_PRIVATE(p, member) (*((typeof((p)->member) __force *) &(p)->member))
25#else /* __CHECKER__ */
26# ifdef STRUCTLEAK_PLUGIN
27# define __user __attribute__((user))
28# else
29# define __user
30# endif
31# define __kernel
32# define __safe
33# define __force
34# define __nocast
35# define __iomem
36# define __chk_user_ptr(x) (void)0
37# define __chk_io_ptr(x) (void)0
38# define __builtin_warning(x, y...) (1)
39# define __must_hold(x)
40# define __acquires(x)
41# define __releases(x)
42# define __acquire(x) (void)0
43# define __release(x) (void)0
44# define __cond_lock(x,c) (c)
45# define __percpu
46# define __rcu
47# define __private
48# define ACCESS_PRIVATE(p, member) ((p)->member)
49#endif /* __CHECKER__ */
50
51/* Indirect macros required for expanded argument pasting, eg. __LINE__. */
52#define ___PASTE(a,b) a##b
53#define __PASTE(a,b) ___PASTE(a,b)
54
55#ifdef __KERNEL__
56
57#ifdef __GNUC__
58#include <linux/compiler-gcc.h>
59#endif
60
61#if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
62#define notrace __attribute__((hotpatch(0,0)))
63#else
64#define notrace __attribute__((no_instrument_function))
65#endif
66
67/* Intel compiler defines __GNUC__. So we will overwrite implementations
68 * coming from above header files here
69 */
70#ifdef __INTEL_COMPILER
71# include <linux/compiler-intel.h>
72#endif
73
74/* Clang compiler defines __GNUC__. So we will overwrite implementations
75 * coming from above header files here
76 */
77#ifdef __clang__
78#include <linux/compiler-clang.h>
79#endif
80
81/*
82 * Generic compiler-dependent macros required for kernel
83 * build go below this comment. Actual compiler/compiler version
84 * specific implementations come from the above header files
85 */
86
87struct ftrace_branch_data {
88 const char *func;
89 const char *file;
90 unsigned line;
91 union {
92 struct {
93 unsigned long correct;
94 unsigned long incorrect;
95 };
96 struct {
97 unsigned long miss;
98 unsigned long hit;
99 };
100 unsigned long miss_hit[2];
101 };
102};
103
104struct ftrace_likely_data {
105 struct ftrace_branch_data data;
106 unsigned long constant;
107};
108
109#endif /* __KERNEL__ */
110
111#endif /* __ASSEMBLY__ */
112
113#ifdef __KERNEL__
114
115/* Don't. Just don't. */
116#define __deprecated
117#define __deprecated_for_modules
118
119#ifndef __must_check
120#define __must_check
121#endif
122
123#ifndef CONFIG_ENABLE_MUST_CHECK
124#undef __must_check
125#define __must_check
126#endif
127
128#ifndef __malloc
129#define __malloc
130#endif
131
132/*
133 * Allow us to avoid 'defined but not used' warnings on functions and data,
134 * as well as force them to be emitted to the assembly file.
135 *
136 * As of gcc 3.4, static functions that are not marked with attribute((used))
137 * may be elided from the assembly file. As of gcc 3.4, static data not so
138 * marked will not be elided, but this may change in a future gcc version.
139 *
140 * NOTE: Because distributions shipped with a backported unit-at-a-time
141 * compiler in gcc 3.3, we must define __used to be __attribute__((used))
142 * for gcc >=3.3 instead of 3.4.
143 *
144 * In prior versions of gcc, such functions and data would be emitted, but
145 * would be warned about except with attribute((unused)).
146 *
147 * Mark functions that are referenced only in inline assembly as __used so
148 * the code is emitted even though it appears to be unreferenced.
149 */
150#ifndef __used
151# define __used /* unimplemented */
152#endif
153
154#ifndef __maybe_unused
155# define __maybe_unused /* unimplemented */
156#endif
157
158#ifndef __always_unused
159# define __always_unused /* unimplemented */
160#endif
161
162#ifndef noinline
163#define noinline
164#endif
165
166/*
167 * Rather then using noinline to prevent stack consumption, use
168 * noinline_for_stack instead. For documentation reasons.
169 */
170#define noinline_for_stack noinline
171
172#ifndef __always_inline
173#define __always_inline inline
174#endif
175
176#endif /* __KERNEL__ */
177
178/*
179 * From the GCC manual:
180 *
181 * Many functions do not examine any values except their arguments,
182 * and have no effects except the return value. Basically this is
183 * just slightly more strict class than the `pure' attribute above,
184 * since function is not allowed to read global memory.
185 *
186 * Note that a function that has pointer arguments and examines the
187 * data pointed to must _not_ be declared `const'. Likewise, a
188 * function that calls a non-`const' function usually must not be
189 * `const'. It does not make sense for a `const' function to return
190 * `void'.
191 */
192#ifndef __attribute_const__
193# define __attribute_const__ /* unimplemented */
194#endif
195
196#ifndef __designated_init
197# define __designated_init
198#endif
199
200#ifndef __latent_entropy
201# define __latent_entropy
202#endif
203
204#ifndef __randomize_layout
205# define __randomize_layout __designated_init
206#endif
207
208#ifndef __no_randomize_layout
209# define __no_randomize_layout
210#endif
211
212#ifndef randomized_struct_fields_start
213# define randomized_struct_fields_start
214# define randomized_struct_fields_end
215#endif
216
217/*
218 * Tell gcc if a function is cold. The compiler will assume any path
219 * directly leading to the call is unlikely.
220 */
221
222#ifndef __cold
223#define __cold
224#endif
225
226/* Simple shorthand for a section definition */
227#ifndef __section
228# define __section(S) __attribute__ ((__section__(#S)))
229#endif
230
231#ifndef __visible
232#define __visible
233#endif
234
235#ifndef __nostackprotector
236# define __nostackprotector
237#endif
238
239/*
240 * Assume alignment of return value.
241 */
242#ifndef __assume_aligned
243#define __assume_aligned(a, ...)
244#endif
245
246
247/* Are two types/vars the same type (ignoring qualifiers)? */
248#ifndef __same_type
249# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
250#endif
251
252/* Is this type a native word size -- useful for atomic operations */
253#ifndef __native_word
254# define __native_word(t) (sizeof(t) == sizeof(char) || sizeof(t) == sizeof(short) || sizeof(t) == sizeof(int) || sizeof(t) == sizeof(long))
255#endif
256
257#ifndef __diag
258#define __diag(string)
259#endif
260
261#ifndef __diag_GCC
262#define __diag_GCC(version, severity, string)
263#endif
264
265#define __diag_push() __diag(push)
266#define __diag_pop() __diag(pop)
267
268#define __diag_ignore(compiler, version, option, comment) \
269 __diag_ ## compiler(version, ignore, option)
270#define __diag_warn(compiler, version, option, comment) \
271 __diag_ ## compiler(version, warn, option)
272#define __diag_error(compiler, version, option, comment) \
273 __diag_ ## compiler(version, error, option)
274
275#endif /* __LINUX_COMPILER_TYPES_H */
276