| dnl # |
| dnl # 4.16 kernel: check if struct posix_acl acl.a_refcount is a refcount_t. |
| dnl # It's an atomic_t on older kernels. |
| dnl # |
| AC_DEFUN([ZFS_AC_KERNEL_ACL_HAS_REFCOUNT], [ |
| AC_MSG_CHECKING([whether posix_acl has refcount_t]) |
| ZFS_LINUX_TRY_COMPILE([ |
| #include <linux/backing-dev.h> |
| #include <linux/refcount.h> |
| #include <linux/posix_acl.h> |
| ],[ |
| struct posix_acl acl; |
| refcount_t *r __attribute__ ((unused)) = &acl.a_refcount; |
| ],[ |
| AC_MSG_RESULT(yes) |
| AC_DEFINE(HAVE_ACL_REFCOUNT, 1, [posix_acl has refcount_t]) |
| ],[ |
| AC_MSG_RESULT(no) |
| ]) |
| ]) |