New upstream version 0.7.2

[mirror_zfs-debian.git] / config / kernel-file-dentry.m4

diff --git a/config/kernel-file-dentry.m4 b/config/kernel-file-dentry.m4
new file mode 100644 (file)
index 0000000..daf742e
--- /dev/null
+++ b/config/kernel-file-dentry.m4
@@ -0,0 +1,20 @@
+dnl #
+dnl # 4.1 API change
+dnl # struct access file->f_path.dentry was replaced by accessor function
+dnl # since fix torvalds/linux@4bacc9c9234c ("overlayfs: Make f_path always
+dnl # point to the overlay and f_inode to the underlay").
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_FILE_DENTRY], [
+       AC_MSG_CHECKING([whether file_dentry() is available])
+       ZFS_LINUX_TRY_COMPILE([
+               #include <linux/fs.h>
+       ],[
+               struct file *f = NULL;
+               file_dentry(f);
+       ],[
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_FILE_DENTRY, 1, [file_dentry() is available])
+       ],[
+               AC_MSG_RESULT(no)
+       ])
+])