config/kernel-block-device-operations.m4

   1 dnl #
   2 dnl # 2.6.38 API change
   3 dnl #
   4 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS], [
   5         ZFS_LINUX_TEST_SRC([block_device_operations_check_events], [
   6                 #include <linux/blkdev.h>
   7
   8                 unsigned int blk_check_events(struct gendisk *disk,
   9                     unsigned int clearing) { return (0); }
  10
  11                 static const struct block_device_operations
  12                     bops __attribute__ ((unused)) = {
  13                         .check_events   = blk_check_events,
  14                 };
  15         ], [], [$NO_UNUSED_BUT_SET_VARIABLE])
  16 ])
  17
  18 AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS], [
  19         AC_MSG_CHECKING([whether bops->check_events() exists])
  20         ZFS_LINUX_TEST_RESULT([block_device_operations_check_events], [
  21                 AC_MSG_RESULT(yes)
  22         ],[
  23                 ZFS_LINUX_TEST_ERROR([bops->check_events()])
  24         ])
  25 ])
  26
  27 dnl #
  28 dnl # 3.10.x API change
  29 dnl #
  30 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID], [
  31         ZFS_LINUX_TEST_SRC([block_device_operations_release_void], [
  32                 #include <linux/blkdev.h>
  33
  34                 void blk_release(struct gendisk *g, fmode_t mode) { return; }
  35
  36                 static const struct block_device_operations
  37                     bops __attribute__ ((unused)) = {
  38                         .open           = NULL,
  39                         .release        = blk_release,
  40                         .ioctl          = NULL,
  41                         .compat_ioctl   = NULL,
  42                 };
  43         ], [], [$NO_UNUSED_BUT_SET_VARIABLE])
  44 ])
  45
  46 AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID], [
  47         AC_MSG_CHECKING([whether bops->release() is void])
  48         ZFS_LINUX_TEST_RESULT([block_device_operations_release_void], [
  49                 AC_MSG_RESULT(yes)
  50         ],[
  51                 ZFS_LINUX_TEST_ERROR([bops->release()])
  52         ])
  53 ])
  54
  55 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS], [
  56         ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS
  57         ZFS_AC_KERNEL_SRC_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
  58 ])
  59
  60 AC_DEFUN([ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS], [
  61         ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_CHECK_EVENTS
  62         ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
  63 ])