| /* |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #ifndef __SHARED_COMPILER_H |
| #define __SHARED_COMPILER_H |
| |
| #define __noinline __attribute__((noinline)) |
| #define __noreturn __attribute__((noreturn)) |
| #define __inline __attribute__((always_inline)) |
| #define __hot __attribute__((hot)) |
| #define __cold __attribute__((cold)) |
| #define __unused __attribute__((unused)) |
| #define __force __attribute__((force)) |
| #define __section(s) __attribute__((section("." # s))) |
| #define __aligned(a) __attribute__((aligned(a))) |
| #define __packed __attribute__((packed)) |
| |
| #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) |
| #define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1) |
| |
| #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1) |
| #define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask)) |
| |
| #define __roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) |
| |
| #define __must_be_array(a) \ |
| BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0]))) |
| #define ARRAY_SIZE(arr) (sizeof((arr)) / sizeof((arr)[0]) + __must_be_array(arr)) |
| |
| #define BIT(b) (1 << (b)) |
| #define MASK(w) (BIT(w) - 1) |
| |
| #undef offsetof |
| #ifdef __compiler_offsetof |
| # define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER) |
| #else |
| # define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) |
| #endif |
| |
| #define likely(x) __builtin_expect(!!(x), 1) |
| #define unlikely(x) __builtin_expect(!!(x), 0) |
| |
| #define min(x, y) ({ \ |
| typeof(x) _min1 = (x); \ |
| typeof(y) _min2 = (y); \ |
| (void) (&_min1 == &_min2); \ |
| _min1 < _min2 ? _min1 : _min2; }) |
| |
| #define max(x, y) ({ \ |
| typeof(x) _max1 = (x); \ |
| typeof(y) _max2 = (y); \ |
| (void) (&_max1 == &_max2); \ |
| _max1 > _max2 ? _max1 : _max2; }) |
| |
| #define min_t(type, x, y) ({ \ |
| type __min1 = (x); \ |
| type __min2 = (y); \ |
| __min1 < __min2 ? __min1 : __min2; }) |
| |
| #define max_t(type, x, y) ({ \ |
| type __max1 = (x); \ |
| type __max2 = (y); \ |
| __max1 > __max2 ? __max1 : __max2; }) |
| |
| |
| #define container_of(ptr, type, member) ({ \ |
| const typeof(((type *)0)->member) * __mptr = (ptr); \ |
| (type *)(((unsigned long)__mptr - offsetof(type, member))); }) |
| |
| #define MAX_ERRNO 4095 |
| |
| #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO) |
| |
| static inline void *ERR_PTR(long errornr) |
| { |
| return (void *) errornr; |
| } |
| |
| static inline long PTR_ERR(const void *ptr) |
| { |
| return (long) ptr; |
| } |
| |
| static inline long IS_ERR(const void *ptr) |
| { |
| return IS_ERR_VALUE((unsigned long)ptr); |
| } |
| |
| static inline long IS_ERR_OR_NULL(const void *ptr) |
| { |
| return !ptr || IS_ERR_VALUE((unsigned long)ptr); |
| } |
| |
| #endif /* __SHARED_COMPILER_H */ |