+dnl #
+dnl # 3.10.x API change
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID], [
+ AC_MSG_CHECKING([whether block_device_operations.release is void])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="${NO_UNUSED_BUT_SET_VARIABLE}"
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/blkdev.h>
+
+ void blk_release(struct gendisk *g, fmode_t mode) { return; }
+
+ static const struct block_device_operations
+ bops __attribute__ ((unused)) = {
+ .open = NULL,
+ .release = blk_release,
+ .ioctl = NULL,
+ .compat_ioctl = NULL,
+ };
+ ],[
+ ],[
+ AC_MSG_RESULT(void)
+ AC_DEFINE(HAVE_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID, 1,
+ [struct block_device_operations.release returns void])
+ ],[
+ AC_MSG_RESULT(int)
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+])