Fix 32-bit build after r367229.
The use of atomic_sub_64() in zfs_zstd.c was breaking the 32-bit build on platforms without native 64-bit atomics due to atomic_sub_64() not being available, and no fallback being provided in _STANDALONE. Provide a standalone stub to match atomic_add_64() using simple math. While this is not actually atomic, it does not matter in libsa context, since it always runs single-threaded and does not run under a scheduler. Reviewed by: mjg (in email)
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=367235
@ -188,6 +188,8 @@ atomic_cas_ptr(volatile void *target, void *cmp, void *newval)
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*/
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#undef atomic_add_64
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#define atomic_add_64(ptr, val) *(ptr) += val
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#undef atomic_sub_64
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#define atomic_sub_64(ptr, val) *(ptr) -= val
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#endif /* !_STANDALONE */
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#endif /* !_OPENSOLARIS_SYS_ATOMIC_H_ */
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