X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=config%2Fkernel-bdi-setup-and-register.m4;fp=config%2Fkernel-bdi-setup-and-register.m4;h=56fab8757374bedad28515f75972cea13ab4c3c8;hb=5547c2f1bf49802835fd6c52f15115ba344a2a8b;hp=0000000000000000000000000000000000000000;hpb=591fb62f19ee2431983a4cbeb0d200b1b8e7daf5;p=zfs.git

diff --git a/config/kernel-bdi-setup-and-register.m4 b/config/kernel-bdi-setup-and-register.m4
new file mode 100644
index 0000000..56fab87
--- /dev/null
+++ b/config/kernel-bdi-setup-and-register.m4
@@ -0,0 +1,15 @@
+dnl #
+dnl # 2.6.34 API change
+dnl # The bdi_setup_and_register() helper function is avilable and
+dnl # exported by the kernel.  This is a trivial helper function but
+dnl # using it significantly simplifies the code surrounding setting
+dnl # up and tearing down the bdi structure.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER], [
+	ZFS_CHECK_SYMBOL_EXPORT(
+		[bdi_setup_and_register],
+		[mm/backing-dev.c],
+		[AC_DEFINE(HAVE_BDI_SETUP_AND_REGISTER, 1,
+		[bdi_setup_and_register() is available])],
+		[])
+])