config/kernel-lookup-bdev.m4

   1 dnl #
   2 dnl # 2.6.27, lookup_bdev() was exported.
   3 dnl # 4.4.0-6.21 - x.y on Ubuntu, lookup_bdev() takes 2 arguments.
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_LOOKUP_BDEV],
   6         [AC_MSG_CHECKING([whether lookup_bdev() wants 1 arg])
   7         ZFS_LINUX_TRY_COMPILE_SYMBOL([
   8                 #include <linux/fs.h>
   9         ], [
  10                 lookup_bdev(NULL);
  11         ], [lookup_bdev], [fs/block_dev.c], [
  12                 AC_MSG_RESULT(yes)
  13                 AC_DEFINE(HAVE_1ARG_LOOKUP_BDEV, 1, [lookup_bdev() wants 1 arg])
  14         ], [
  15                 AC_MSG_RESULT(no)
  16                 AC_MSG_CHECKING([whether lookup_bdev() wants 2 args])
  17                 ZFS_LINUX_TRY_COMPILE_SYMBOL([
  18                         #include <linux/fs.h>
  19                 ], [
  20                         lookup_bdev(NULL, FMODE_READ);
  21                 ], [lookup_bdev], [fs/block_dev.c], [
  22                         AC_MSG_RESULT(yes)
  23                         AC_DEFINE(HAVE_2ARGS_LOOKUP_BDEV, 1,
  24                             [lookup_bdev() wants 2 args])
  25                 ], [
  26                         AC_MSG_RESULT(no)
  27                 ])
  28         ])
  29 ])