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scst/include/backport.h: Add an IS_ENABLED() backport

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@8137 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-04-02 04:15:18 +00:00
parent 621e67205f
commit 3c75a7c47e
1 changed files with 19 additions and 0 deletions
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19
scst/include/backport.h
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@@ -532,6 +532,25 @@ static inline struct io_context *get_task_io_context(struct task_struct *task,
}
#endif
/* <linux/kconfig.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0) && !defined(RHEL_MAJOR)
/*
* See also commit 2a11c8ea20bf ("kconfig: Introduce IS_ENABLED(), IS_BUILTIN()
* and IS_MODULE()") # v3.1.
*/
#define __ARG_PLACEHOLDER_1 0,
#define __take_second_arg(__ignored, val, ...) val
#define __or(x, y) ___or(x, y)
#define ___or(x, y) ____or(__ARG_PLACEHOLDER_##x, y)
#define ____or(arg1_or_junk, y) __take_second_arg(arg1_or_junk 1, y)
#define __is_defined(x) ___is_defined(x)
#define ___is_defined(val) ____is_defined(__ARG_PLACEHOLDER_##val)
#define ____is_defined(arg1_or_junk) __take_second_arg(arg1_or_junk 1, 0)
#define IS_BUILTIN(option) __is_defined(option)
#define IS_MODULE(option) __is_defined(option##_MODULE)
#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
#endif
/* <linux/kernel.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)