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Standalone SX shims

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Create a do-nothing version of SX locks. OpenZFS needs them. However,
since the boot loader is single threaded, they can be nops.
This commit is contained in:
Warner Losh 2020-09-29 18:06:02 +00:00
parent cf0fd1f84a
commit dc761d84e2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366265
1 changed files with 22 additions and 0 deletions
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22
sys/sys/sx.h
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@ -300,4 +300,26 @@ __sx_xunlock(struct sx *sx, struct thread *td, const char *file, int line)
#endif /* _KERNEL */
#ifdef _STANDALONE
/* since we have no threads in the boot loader, trivially implement no-op version */
#define sx_xlock(s) (1)
#define sx_try_xlock(s) (1)
#define sx_xunlock(s) (1)
#define SX_DUPOK 0
#define SX_NEW 0
#define SX_NOWITNESS 0
static __inline void
sx_init_flags(struct sx *sx, const char *description, int opts)
{
}
static __inline void
sx_destroy(struct sx *sx)
{
}
#endif /* _STANDALONE */
#endif /* !_SYS_SX_H_ */