[mirror_zfs-debian.git] / config / kernel-generic_io_acct.m4

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)
	])
])
Commit	Line	Data
e10b0808 AX	1	dnl #
	2	dnl # 3.19 API addition
	3	dnl #
	4	dnl # torvalds/linux@394ffa503bc40e32d7f54a9b817264e81ce131b4 allows us to
	5	dnl # increment iostat counters without generic_make_request().
	6	dnl #
	7	AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
	8	AC_MSG_CHECKING([whether generic IO accounting symbols are avaliable])
	9	ZFS_LINUX_TRY_COMPILE_SYMBOL([
	10	#include <linux/bio.h>
	11
	12	void (*generic_start_io_acct_f)(int, unsigned long,
	13	struct hd_struct *) = &generic_start_io_acct;
	14	void (generic_end_io_acct_f)(int, struct hd_struct ,
	15	unsigned long) = &generic_end_io_acct;
	16	], [
	17	generic_start_io_acct(0, 0, NULL);
	18	generic_end_io_acct(0, NULL, 0);
	19	], [generic_start_io_acct], [block/bio.c], [
	20	AC_MSG_RESULT(yes)
	21	AC_DEFINE(HAVE_GENERIC_IO_ACCT, 1,
	22	[generic_start_io_acct()/generic_end_io_acct() avaliable])
	23	], [
	24	AC_MSG_RESULT(no)
	25	])
	26	])