config/kernel-blk-end-request.m4

   1 dnl #
   2 dnl # 2.6.31 API change
   3 dnl # In 2.6.29 kernels blk_end_request() was a GPL-only symbol, this was
   4 dnl # changed in 2.6.31 so it may be used by non-GPL modules.
   5 dnl #
   6 AC_DEFUN([ZFS_AC_KERNEL_BLK_END_REQUEST], [
   7         AC_MSG_CHECKING([whether blk_end_request() is available])
   8         ZFS_LINUX_TRY_COMPILE([
   9                 #include <linux/blkdev.h>
  10         ],[
  11                 struct request *req = NULL;
  12                 (void) blk_end_request(req, 0, 0);
  13         ],[
  14                 AC_MSG_RESULT(yes)
  15                 AC_DEFINE(HAVE_BLK_END_REQUEST, 1,
  16                           [blk_end_request() is available])
  17         ],[
  18                 AC_MSG_RESULT(no)
  19         ])
  20
  21         AC_MSG_CHECKING([whether blk_end_request() is GPL-only])
  22         ZFS_LINUX_TRY_COMPILE([
  23                 #include <linux/module.h>
  24                 #include <linux/blkdev.h>
  25
  26                 MODULE_LICENSE("CDDL");
  27         ],[
  28                 struct request *req = NULL;
  29                 (void) blk_end_request(req, 0, 0);
  30         ],[
  31                 AC_MSG_RESULT(no)
  32         ],[
  33                 AC_MSG_RESULT(yes)
  34                 AC_DEFINE(HAVE_BLK_END_REQUEST_GPL_ONLY, 1,
  35                           [blk_end_request() is GPL-only])
  36         ])
  37 ])