config/kernel-generic_io_acct.m4

   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_3ARG], [
   8         AC_MSG_CHECKING([whether 3 arg generic IO accounting symbols are available])
   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_3ARG, 1,
  22                     [generic_start_io_acct()/generic_end_io_acct() available])
  23         ], [
  24                 AC_MSG_RESULT(no)
  25         ])
  26 ])
  27
  28 dnl #
  29 dnl # Linux 4.14 API,
  30 dnl #
  31 dnl # generic_start_io_acct/generic_end_io_acct now require request_queue to be
  32 dnl # provided. No functional changes, but preparation for inflight accounting
  33 dnl #
  34 AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT_4ARG], [
  35         AC_MSG_CHECKING([whether 4 arg generic IO accounting symbols are available])
  36         ZFS_LINUX_TRY_COMPILE_SYMBOL([
  37                 #include <linux/bio.h>
  38
  39                 void (*generic_start_io_acct_f)(struct request_queue *, int,
  40                     unsigned long, struct hd_struct *) = &generic_start_io_acct;
  41                 void (*generic_end_io_acct_f)(struct request_queue *, int,
  42                     struct hd_struct *, unsigned long) = &generic_end_io_acct;
  43         ], [
  44                 generic_start_io_acct(NULL, 0, 0, NULL);
  45                 generic_end_io_acct(NULL, 0, NULL, 0);
  46         ], [generic_start_io_acct], [block/bio.c], [
  47                 AC_MSG_RESULT(yes)
  48                 AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1,
  49                     [generic_start_io_acct()/generic_end_io_acct() 4 arg available])
  50         ], [
  51                 AC_MSG_RESULT(no)
  52         ])
  53 ])