UBUNTU: SAUCE: (noup) Update spl to 0.6.5.9-1ubuntu2, zfs to 0.6.5.9-5ubuntu7

[mirror_ubuntu-artful-kernel.git] / zfs / config / kernel-bdi.m4

diff --git a/zfs/config/kernel-bdi.m4 b/zfs/config/kernel-bdi.m4
new file mode 100644 (file)
index 0000000..5394565
--- /dev/null
+++ b/zfs/config/kernel-bdi.m4
@@ -0,0 +1,56 @@
+dnl #
+dnl # 2.6.32 - 2.6.33, bdi_setup_and_register() is not exported.
+dnl # 2.6.34 - 3.19, bdi_setup_and_register() takes 3 arguments.
+dnl # 4.0 - 4.11, bdi_setup_and_register() takes 2 arguments.
+dnl # 4.12 - x.y, super_setup_bdi_name() new interface.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BDI], [
+       AC_MSG_CHECKING([whether super_setup_bdi_name() exists])
+       ZFS_LINUX_TRY_COMPILE_SYMBOL([
+               #include <linux/fs.h>
+               struct super_block sb;
+       ], [
+               char *name = "bdi";
+               int error __attribute__((unused)) =
+                   super_setup_bdi_name(&sb, name);
+       ], [super_setup_bdi_name], [fs/super.c], [
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_SUPER_SETUP_BDI_NAME, 1,
+                   [super_setup_bdi_name() exits])
+       ], [
+               AC_MSG_RESULT(no)
+               AC_MSG_CHECKING(
+                   [whether bdi_setup_and_register() wants 2 args])
+               ZFS_LINUX_TRY_COMPILE_SYMBOL([
+                       #include <linux/backing-dev.h>
+                       struct backing_dev_info bdi;
+               ], [
+                       char *name = "bdi";
+                       int error __attribute__((unused)) =
+                           bdi_setup_and_register(&bdi, name);
+               ], [bdi_setup_and_register], [mm/backing-dev.c], [
+                       AC_MSG_RESULT(yes)
+                       AC_DEFINE(HAVE_2ARGS_BDI_SETUP_AND_REGISTER, 1,
+                           [bdi_setup_and_register() wants 2 args])
+               ], [
+                       AC_MSG_RESULT(no)
+                       AC_MSG_CHECKING(
+                           [whether bdi_setup_and_register() wants 3 args])
+                       ZFS_LINUX_TRY_COMPILE_SYMBOL([
+                               #include <linux/backing-dev.h>
+                               struct backing_dev_info bdi;
+                       ], [
+                               char *name = "bdi";
+                               unsigned int cap = BDI_CAP_MAP_COPY;
+                               int error __attribute__((unused)) =
+                                   bdi_setup_and_register(&bdi, name, cap);
+                       ], [bdi_setup_and_register], [mm/backing-dev.c], [
+                               AC_MSG_RESULT(yes)
+                               AC_DEFINE(HAVE_3ARGS_BDI_SETUP_AND_REGISTER, 1,
+                                   [bdi_setup_and_register() wants 3 args])
+                       ], [
+                               AC_MSG_RESULT(no)
+                       ])
+               ])
+       ])
+])