config/kernel-dentry-alias.m4

   1 dnl #
   2 dnl # 3.18 API change
   3 dnl # Dentry aliases are in d_u struct dentry member
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_SRC_DENTRY_ALIAS_D_U], [
   6         ZFS_LINUX_TEST_SRC([dentry_alias_d_u], [
   7                 #include <linux/fs.h>
   8                 #include <linux/dcache.h>
   9                 #include <linux/list.h>
  10         ], [
  11                 struct inode *inode __attribute__ ((unused)) = NULL;
  12                 struct dentry *dentry __attribute__ ((unused)) = NULL;
  13                 hlist_for_each_entry(dentry, &inode->i_dentry,
  14                     d_u.d_alias) {
  15                         d_drop(dentry);
  16                 }
  17         ])
  18 ])
  19
  20 AC_DEFUN([ZFS_AC_KERNEL_DENTRY_ALIAS_D_U], [
  21         AC_MSG_CHECKING([whether dentry aliases are in d_u member])
  22         ZFS_LINUX_TEST_RESULT([dentry_alias_d_u], [
  23                 AC_MSG_RESULT(yes)
  24                 AC_DEFINE(HAVE_DENTRY_D_U_ALIASES, 1,
  25                     [dentry aliases are in d_u member])
  26         ],[
  27                 AC_MSG_RESULT(no)
  28         ])
  29 ])
  30