Proclikefs compiles on Linux 3.13.

config-linuxmodule.h.in

@@ -55,6 +55,9 @@
 /* Define if you have the d_make_root function. */
 #undef HAVE_LINUX_D_MAKE_ROOT
 
+/* Define if 'struct dentry' has a 'd_child' member. */
+#undef HAVE_LINUX_DENTRY_D_CHILD
+
 /* Define if your Linux kernel has dev_ioctl. */
 #undef HAVE_LINUX_DEV_IOCTL
 

configure

@@ -769,7 +769,6 @@ infodir
 docdir
 oldincludedir
 includedir
-runstatedir
 localstatedir
 sharedstatedir
 sysconfdir
@@ -906,7 +905,6 @@ datadir='${datarootdir}'
 sysconfdir='${prefix}/etc'
 sharedstatedir='${prefix}/com'
 localstatedir='${prefix}/var'
-runstatedir='${localstatedir}/run'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
 docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
@@ -1159,15 +1157,6 @@ do
   | -silent | --silent | --silen | --sile | --sil)
     silent=yes ;;
 
-  -runstatedir | --runstatedir | --runstatedi | --runstated \
-  | --runstate | --runstat | --runsta | --runst | --runs \
-  | --run | --ru | --r)
-    ac_prev=runstatedir ;;
-  -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
-  | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
-  | --run=* | --ru=* | --r=*)
-    runstatedir=$ac_optarg ;;
-
   -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
     ac_prev=sbindir ;;
   -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
@@ -1305,7 +1294,7 @@ fi
 for ac_var in	exec_prefix prefix bindir sbindir libexecdir datarootdir \
 		datadir sysconfdir sharedstatedir localstatedir includedir \
 		oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
-		libdir localedir mandir runstatedir
+		libdir localedir mandir
 do
   eval ac_val=\$$ac_var
   # Remove trailing slashes.
@@ -1458,7 +1447,6 @@ Fine tuning of the installation directories:
   --sysconfdir=DIR        read-only single-machine data [PREFIX/etc]
   --sharedstatedir=DIR    modifiable architecture-independent data [PREFIX/com]
   --localstatedir=DIR     modifiable single-machine data [PREFIX/var]
-  --runstatedir=DIR       modifiable per-process data [LOCALSTATEDIR/run]
   --libdir=DIR            object code libraries [EPREFIX/lib]
   --includedir=DIR        C header files [PREFIX/include]
   --oldincludedir=DIR     C header files for non-gcc [/usr/include]
@@ -12673,6 +12661,62 @@ $as_echo "#define HAVE_LINUX_D_MAKE_ROOT 1" >>confdefs.h
 
     fi
 
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct dentry has a d_child member" >&5
+$as_echo_n "checking whether struct dentry has a d_child member... " >&6; }
+if ${ac_cv_linuxmodule_dentry_d_child+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#define KBUILD_STR(s) #s
+#define KBUILD_BASENAME KBUILD_STR(click)
+#define KBUILD_MODNAME KBUILD_STR(click)
+#define new linux_new
+#define this linux_this
+#define delete linux_delete
+#define class linux_class
+#define virtual linux_virtual
+#define typename linux_typename
+#define private linux_private
+#define protected linux_protected
+#define public linux_public
+#define namespace linux_namespace
+#define false linux_false
+#define true linux_true
+#define CLICK_CXX_PROTECTED 1
+$linux_autoconf_include
+#include <asm/types.h>
+#include <linux/fs.h>
+#include <linux/dcache.h>
+int
+main ()
+{
+extern struct dentry* de; de->d_child.next = 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_linuxmodule_dentry_d_child=yes
+else
+  ac_cv_linuxmodule_dentry_d_child=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_linuxmodule_dentry_d_child" >&5
+$as_echo "$ac_cv_linuxmodule_dentry_d_child" >&6; }
+    if test $ac_cv_linuxmodule_dentry_d_child = yes; then
+
+$as_echo "#define HAVE_LINUX_DENTRY_D_CHILD 1" >>confdefs.h
+
+    fi
+
     fi
     CC="$save_cc"
     CXX="$save_cxx"

configure.in

@@ -1812,6 +1812,17 @@ CFLAGS="$save_cflags"
         AC_DEFINE([HAVE_LINUX_D_MAKE_ROOT], [1], [Define if you have the d_make_root function.])
     fi
 
+    AC_CACHE_CHECK([whether struct dentry has a d_child member], [ac_cv_linuxmodule_dentry_d_child],
+        [AC_LANG_C
+        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([CLICK_LINUXMODULE_PROLOGUE()[
+#include <linux/fs.h>
+#include <linux/dcache.h>]],
+[[extern struct dentry* de; de->d_child.next = 0;]])],
+        [ac_cv_linuxmodule_dentry_d_child=yes], [ac_cv_linuxmodule_dentry_d_child=no])])
+    if test $ac_cv_linuxmodule_dentry_d_child = yes; then
+        AC_DEFINE([HAVE_LINUX_DENTRY_D_CHILD], [1], [Define if 'struct dentry' has a 'd_child' member.])
+    fi
+
     fi dnl ac_cv_cxx_aware_system
 
     CC="$save_cc"

linuxmodule/proclikefs.c

@@ -254,14 +254,14 @@ proclikefs_kill_super(struct super_block *sb)
 	struct dentry *active = dentry_tree;
 	/* Process this dentry, move to next */
 	active->d_op = &proclikefs_null_dentry_operations;
-	dentry_tree = (struct dentry *)active->d_fsdata;
+	dentry_tree = (struct dentry*) active->d_fsdata;
 	/* Prepend children to dentry_tree */
 	next = active->d_subdirs.next;
 	while (next != &active->d_subdirs) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 16)
-	    struct dentry *child = list_entry(next, struct dentry, d_u.d_child);
+#if HAVE_LINUX_DENTRY_D_CHILD
+            struct dentry* child = list_entry(next, struct dentry, d_child);
 #else
-	    struct dentry *child = list_entry(next, struct dentry, d_child);
+	    struct dentry* child = list_entry(next, struct dentry, d_u.d_child);
 #endif
 	    next = next->next;
 	    d_drop(child);