| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * |
| * (C) COPYRIGHT 2014-2015, 2018, 2020-2022 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU license. |
| * |
| * 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, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| /* |
| * Kernel-wide include for common macros and types. |
| */ |
| |
| #ifndef _MALISW_H_ |
| #define _MALISW_H_ |
| |
| #include <linux/version.h> |
| |
| /** |
| * MIN - Return the lesser of two values. |
| * @x: value1 |
| * @y: value2 |
| * |
| * As a macro it may evaluate its arguments more than once. |
| * Refer to MAX macro for more details |
| */ |
| #define MIN(x, y) ((x) < (y) ? (x) : (y)) |
| |
| /** |
| * MAX - Return the greater of two values. |
| * @x: value1 |
| * @y: value2 |
| * |
| * As a macro it may evaluate its arguments more than once. |
| * If called on the same two arguments as MIN it is guaranteed to return |
| * the one that MIN didn't return. This is significant for types where not |
| * all values are comparable e.g. NaNs in floating-point types. But if you want |
| * to retrieve the min and max of two values, consider using a conditional swap |
| * instead. |
| */ |
| #define MAX(x, y) ((x) < (y) ? (y) : (x)) |
| |
| /** |
| * CSTD_UNUSED - Function-like macro for suppressing unused variable warnings. |
| * |
| * @x: unused variable |
| * |
| * Where possible such variables should be removed; this macro is present for |
| * cases where we much support API backwards compatibility. |
| */ |
| #define CSTD_UNUSED(x) ((void)(x)) |
| |
| /** |
| * CSTD_NOP - Function-like macro for use where "no behavior" is desired. |
| * @...: no-op |
| * |
| * This is useful when compile time macros turn a function-like macro in to a |
| * no-op, but where having no statement is otherwise invalid. |
| */ |
| #define CSTD_NOP(...) ((void)#__VA_ARGS__) |
| |
| /** |
| * CSTD_STR1 - Function-like macro for stringizing a single level macro. |
| * @x: macro's value |
| * |
| * @code |
| * #define MY_MACRO 32 |
| * CSTD_STR1( MY_MACRO ) |
| * > "MY_MACRO" |
| * @endcode |
| */ |
| #define CSTD_STR1(x) #x |
| |
| /** |
| * CSTD_STR2 - Function-like macro for stringizing a macro's value. |
| * @x: macro's value |
| * |
| * This should not be used if the macro is defined in a way which may have no |
| * value; use the alternative @c CSTD_STR2N macro should be used instead. |
| * @code |
| * #define MY_MACRO 32 |
| * CSTD_STR2( MY_MACRO ) |
| * > "32" |
| * @endcode |
| */ |
| #define CSTD_STR2(x) CSTD_STR1(x) |
| |
| /* LINUX_VERSION_CODE < 5.4 */ |
| #if (KERNEL_VERSION(5, 4, 0) > LINUX_VERSION_CODE) |
| #if defined(GCC_VERSION) && GCC_VERSION >= 70000 |
| #ifndef __fallthrough |
| #define __fallthrough __attribute__((fallthrough)) |
| #endif /* __fallthrough */ |
| #define fallthrough __fallthrough |
| #else |
| #define fallthrough CSTD_NOP(...) /* fallthrough */ |
| #endif /* GCC_VERSION >= 70000 */ |
| #endif /* KERNEL_VERSION(5, 4, 0) */ |
| |
| #endif /* _MALISW_H_ */ |
