dnl #
dnl # 3.19 API addition
dnl #
dnl # torvalds/linux@394ffa503bc40e32d7f54a9b817264e81ce131b4 allows us to
dnl # increment iostat counters without generic_make_request().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
	AC_MSG_CHECKING([whether generic IO accounting symbols are avaliable])
	ZFS_LINUX_TRY_COMPILE_SYMBOL([
		#include <linux/bio.h>

		void (*generic_start_io_acct_f)(int, unsigned long,
		    struct hd_struct *) = &generic_start_io_acct;
		void (*generic_end_io_acct_f)(int, struct hd_struct *,
		    unsigned long) = &generic_end_io_acct;
	], [
		generic_start_io_acct(0, 0, NULL);
		generic_end_io_acct(0, NULL, 0);
	], [generic_start_io_acct], [block/bio.c], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_GENERIC_IO_ACCT, 1,
		    [generic_start_io_acct()/generic_end_io_acct() avaliable])
	], [
		AC_MSG_RESULT(no)
	])
])