/usr/src/zfs-0.7.5/config/kernel-file-dentry.m4 is in zfs-dkms 0.7.5-1ubuntu15.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 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)
])
])
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