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Allow atomic ops to be somewhat safely used in userland. We always use

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lock prefixes in the userland case so that the binaries will work on both
SMP and UP systems.
This commit is contained in:
John Baldwin 2001-10-08 20:58:24 +00:00
parent 275d9b59d3
commit 2a89a48fbd
2 changed files with 14 additions and 6 deletions
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10
sys/amd64/include/atomic.h
View File

@ -75,15 +75,19 @@ void atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v);
#else /* !KLD_MODULE */
#if defined(SMP)
/*
* For userland, assume the SMP case and use lock prefixes so that
* the binaries will run on both types of systems.
*/
#if defined(SMP) || !defined(_KERNEL)
#if defined(LOCORE)
#define MPLOCKED lock ;
#else /* !LOCORE */
#define MPLOCKED "lock ; "
#endif /* LOCORE */
#else /* !SMP */
#else /* SMP || !_KERNEL */
#define MPLOCKED
#endif /* SMP */
#endif /* SMP || !_KERNEL */
#if !defined(LOCORE)
/*

10
sys/i386/include/atomic.h
View File

@ -75,15 +75,19 @@ void atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v);
#else /* !KLD_MODULE */
#if defined(SMP)
/*
* For userland, assume the SMP case and use lock prefixes so that
* the binaries will run on both types of systems.
*/
#if defined(SMP) || !defined(_KERNEL)
#if defined(LOCORE)
#define MPLOCKED lock ;
#else /* !LOCORE */
#define MPLOCKED "lock ; "
#endif /* LOCORE */
#else /* !SMP */
#else /* SMP || !_KERNEL */
#define MPLOCKED
#endif /* SMP */
#endif /* SMP || !_KERNEL */
#if !defined(LOCORE)
/*