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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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