1 #ifndef __TOOLS_LINUX_KERNEL_H
2 #define __TOOLS_LINUX_KERNEL_H
11 #include <linux/bug.h>
12 #include <linux/byteorder.h>
13 #include <linux/compiler.h>
14 #include <linux/math.h>
15 #include <linux/minmax.h>
17 #define BIT(nr) (1UL << (nr))
18 #define BIT_ULL(nr) (1ULL << (nr))
20 #define __ARG_PLACEHOLDER_1 0,
21 #define __take_second_arg(__ignored, val, ...) val
23 #define __and(x, y) ___and(x, y)
24 #define ___and(x, y) ____and(__ARG_PLACEHOLDER_##x, y)
25 #define ____and(arg1_or_junk, y) __take_second_arg(arg1_or_junk y, 0)
27 #define __or(x, y) ___or(x, y)
28 #define ___or(x, y) ____or(__ARG_PLACEHOLDER_##x, y)
29 #define ____or(arg1_or_junk, y) __take_second_arg(arg1_or_junk 1, y)
31 #define __is_defined(x) ___is_defined(x)
32 #define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val)
33 #define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0)
36 * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
37 * otherwise. For boolean options, this is equivalent to
38 * IS_ENABLED(CONFIG_FOO).
40 #define IS_BUILTIN(option) __is_defined(option)
43 * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
46 #define IS_MODULE(option) __is_defined(option##_MODULE)
49 * IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
50 * code can call a function defined in code compiled based on CONFIG_FOO.
51 * This is similar to IS_ENABLED(), but returns false when invoked from
52 * built-in code when CONFIG_FOO is set to 'm'.
54 #define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
55 __and(IS_MODULE(option), __is_defined(MODULE)))
58 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
61 #define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
62 #define EXPORT_SYMBOL(sym)
64 #define U8_MAX ((u8)~0U)
65 #define S8_MAX ((s8)(U8_MAX>>1))
66 #define S8_MIN ((s8)(-S8_MAX - 1))
67 #define U16_MAX ((u16)~0U)
68 #define S16_MAX ((s16)(U16_MAX>>1))
69 #define S16_MIN ((s16)(-S16_MAX - 1))
70 #define U32_MAX ((u32)~0U)
71 #define S32_MAX ((s32)(U32_MAX>>1))
72 #define S32_MIN ((s32)(-S32_MAX - 1))
73 #define U64_MAX ((u64)~0ULL)
74 #define S64_MAX ((s64)(U64_MAX>>1))
75 #define S64_MIN ((s64)(-S64_MAX - 1))
77 #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
78 #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
80 #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a)))
81 #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
83 #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
84 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
87 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
92 * container_of - cast a member of a structure out to the containing structure
93 * @ptr: the pointer to the member.
94 * @type: the type of the container struct this is embedded in.
95 * @member: the name of the member within the struct.
98 #define container_of(ptr, type, member) ({ \
99 const typeof(((type *)0)->member) * __mptr = (ptr); \
100 (type *)((char *)__mptr - offsetof(type, member)); })
103 #ifndef __struct_group
104 #define __struct_group(TAG, NAME, ATTRS, MEMBERS...) \
106 struct { MEMBERS } ATTRS; \
107 struct TAG { MEMBERS } ATTRS NAME; \
111 #define struct_group(NAME, MEMBERS...) \
112 __struct_group(/* no tag */, NAME, /* no attrs */, MEMBERS)
115 do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
117 /* This counts to 12. Any more, it will return 13th argument. */
118 #define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
119 #define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
121 #define _RET_IP_ (unsigned long)__builtin_return_address(0)
122 #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
124 #define might_sleep()
126 #define cpu_relax() barrier()
127 #define cpu_relax_lowlatency() barrier()
129 #define panic(fmt, ...) \
131 printf(fmt, ##__VA_ARGS__); \
135 int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
136 int __must_check _kstrtol(const char *s, unsigned int base, long *res);
138 int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
139 int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
142 * kstrtoul - convert a string to an unsigned long
143 * @s: The start of the string. The string must be null-terminated, and may also
144 * include a single newline before its terminating null. The first character
145 * may also be a plus sign, but not a minus sign.
146 * @base: The number base to use. The maximum supported base is 16. If base is
147 * given as 0, then the base of the string is automatically detected with the
148 * conventional semantics - If it begins with 0x the number will be parsed as a
149 * hexadecimal (case insensitive), if it otherwise begins with 0, it will be
150 * parsed as an octal number. Otherwise it will be parsed as a decimal.
151 * @res: Where to write the result of the conversion on success.
153 * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
154 * Used as a replacement for the obsolete simple_strtoull. Return code must
157 static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
160 * We want to shortcut function call, but
161 * __builtin_types_compatible_p(unsigned long, unsigned long long) = 0.
163 if (sizeof(unsigned long) == sizeof(unsigned long long) &&
164 __alignof__(unsigned long) == __alignof__(unsigned long long))
165 return kstrtoull(s, base, (unsigned long long *)res);
167 return _kstrtoul(s, base, res);
171 * kstrtol - convert a string to a long
172 * @s: The start of the string. The string must be null-terminated, and may also
173 * include a single newline before its terminating null. The first character
174 * may also be a plus sign or a minus sign.
175 * @base: The number base to use. The maximum supported base is 16. If base is
176 * given as 0, then the base of the string is automatically detected with the
177 * conventional semantics - If it begins with 0x the number will be parsed as a
178 * hexadecimal (case insensitive), if it otherwise begins with 0, it will be
179 * parsed as an octal number. Otherwise it will be parsed as a decimal.
180 * @res: Where to write the result of the conversion on success.
182 * Returns 0 on success, -ERANGE on overflow and -EINVAL on parsing error.
183 * Used as a replacement for the obsolete simple_strtoull. Return code must
186 static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
189 * We want to shortcut function call, but
190 * __builtin_types_compatible_p(long, long long) = 0.
192 if (sizeof(long) == sizeof(long long) &&
193 __alignof__(long) == __alignof__(long long))
194 return kstrtoll(s, base, (long long *)res);
196 return _kstrtol(s, base, res);
199 int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
200 int __must_check kstrtoint(const char *s, unsigned int base, int *res);
202 static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
204 return kstrtoull(s, base, res);
207 static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res)
209 return kstrtoll(s, base, res);
212 static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res)
214 return kstrtouint(s, base, res);
217 static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res)
219 return kstrtoint(s, base, res);
223 extern void prt_u64(struct printbuf *out, u64 num);
225 extern __printf(2, 0) void prt_vprintf(struct printbuf *out, const char *fmt, va_list args);
226 extern __printf(2, 3) void prt_printf(struct printbuf *out, const char *fmt, ...);
228 static const char hex_asc[] = "0123456789abcdef";
229 #define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
230 #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
231 static const char hex_asc_upper[] = "0123456789ABCDEF";
232 #define hex_asc_upper_lo(x) hex_asc_upper[((x) & 0x0f)]
233 #define hex_asc_upper_hi(x) hex_asc_upper[((x) & 0xf0) >> 4]
235 /* The hash is always the low bits of hash_len */
236 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
237 #define HASH_LEN_DECLARE u32 hash; u32 len
239 #define HASH_LEN_DECLARE u32 len; u32 hash
249 const unsigned char *name;
252 #define QSTR_INIT(n,l) { { { .len = l } }, .name = n }
254 #define POISON_FREE 0x6b
256 static inline void dump_stack(void) {}
258 #define unsafe_memcpy(dst, src, bytes, justification) \
259 memcpy(dst, src, bytes)
261 #ifdef __DECLARE_FLEX_ARRAY
262 #define DECLARE_FLEX_ARRAY(TYPE, NAME) __DECLARE_FLEX_ARRAY(TYPE, NAME)
264 #define DECLARE_FLEX_ARRAY(T, member) T member[0]