Linux 2.6.26 compat, lookup_bdev()

[zfs.git] / config / kernel-lookup-bdev.m4

diff --git a/config/kernel-lookup-bdev.m4 b/config/kernel-lookup-bdev.m4
new file mode 100644 (file)
index 0000000..245f95f
--- /dev/null
+++ b/config/kernel-lookup-bdev.m4
@@ -0,0 +1,17 @@
+dnl #
+dnl # 2.6.27 API change
+dnl # lookup_bdev() was exported.
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_LOOKUP_BDEV],
+       [AC_MSG_CHECKING([whether lookup_bdev() is available])
+       ZFS_LINUX_TRY_COMPILE_SYMBOL([
+               #include <linux/fs.h>
+       ], [
+               lookup_bdev(NULL);
+       ], [lookup_bdev], [fs/block_dev.c], [
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_LOOKUP_BDEV, 1, [lookup_bdev() is available])
+       ], [
+               AC_MSG_RESULT(no)
+       ])
+])