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Linux 4.16 compat: use correct *_dec_and_test()

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Use refcount_dec_and_test() on 4.16+ kernels, atomic_dec_and_test()
on older kernels.  https://lwn.net/Articles/714974/

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes: #7179
Closes: #7211
This commit is contained in:
Tony Hutter
2018-02-22 09:02:06 -08:00
parent 30ac8de48a
commit e5ba614d05
3 changed files with 26 additions and 1 deletions
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include/linux/vfs_compat.h
+5 -1
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@@ -288,9 +288,13 @@ zpl_posix_acl_release(struct posix_acl *acl)
{
if ((acl == NULL) || (acl == ACL_NOT_CACHED))
return;
#ifdef HAVE_ACL_REFCOUNT
if (refcount_dec_and_test(&acl->a_refcount))
zpl_posix_acl_release_impl(acl);
#else
if (atomic_dec_and_test(&acl->a_refcount))
zpl_posix_acl_release_impl(acl);
#endif
}
#endif /* HAVE_POSIX_ACL_RELEASE */