2 dnl # 2.6.32 - 2.6.33, bdi_setup_and_register() is not exported.
3 dnl # 2.6.34 - 3.19, bdi_setup_and_register() takes 3 arguments.
4 dnl # 4.0 - 4.11, bdi_setup_and_register() takes 2 arguments.
5 dnl # 4.12 - x.y, super_setup_bdi_name() new interface.
7 AC_DEFUN([ZFS_AC_KERNEL_BDI], [
8 AC_MSG_CHECKING([whether super_setup_bdi_name() exists])
9 ZFS_LINUX_TRY_COMPILE_SYMBOL([
11 struct super_block sb;
14 atomic_long_t zfs_bdi_seq;
15 int error __attribute__((unused)) =
16 super_setup_bdi_name(&sb, "%.28s-%ld", name, atomic_long_inc_return(&zfs_bdi_seq));
17 ], [super_setup_bdi_name], [fs/super.c], [
19 AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1,
20 [super_setup_bdi_name() exits])
24 [whether bdi_setup_and_register() wants 2 args])
25 ZFS_LINUX_TRY_COMPILE_SYMBOL([
26 #include <linux/backing-dev.h>
27 struct backing_dev_info bdi;
30 int error __attribute__((unused)) =
31 bdi_setup_and_register(&bdi, name);
32 ], [bdi_setup_and_register], [mm/backing-dev.c], [
34 AC_DEFINE(HAVE_2ARGS_BDI_SETUP_AND_REGISTER, 1,
35 [bdi_setup_and_register() wants 2 args])
39 [whether bdi_setup_and_register() wants 3 args])
40 ZFS_LINUX_TRY_COMPILE_SYMBOL([
41 #include <linux/backing-dev.h>
42 struct backing_dev_info bdi;
45 unsigned int cap = BDI_CAP_MAP_COPY;
46 int error __attribute__((unused)) =
47 bdi_setup_and_register(&bdi, name, cap);
48 ], [bdi_setup_and_register], [mm/backing-dev.c], [
50 AC_DEFINE(HAVE_3ARGS_BDI_SETUP_AND_REGISTER, 1,
51 [bdi_setup_and_register() wants 3 args])