Most recent kernel where this bug did not occur: 2.6.16-rc1
Distribution: Gentoo
Hardware Environment: amd64
Problem Description:

reiserfs doesn't build with REISERFS_FS_POSIX_ACL=n

Steps to reproduce:
$ make
  CHK     include/linux/version.h
  SPLIT   include/linux/autoconf.h -> include/config/*
  CHK     include/linux/compile.h
  CHK     usr/initramfs_list
  GZIP    kernel/config_data.gz
  IKCFG   kernel/config_data.h
  CC      kernel/configs.o
  LD      kernel/built-in.o
  CC      fs/reiserfs/xattr.o
fs/reiserfs/xattr.c: In function `reiserfs_check_acl':
fs/reiserfs/xattr.c:1330: error: called object is not a function
make[2]: *** [fs/reiserfs/xattr.o] Error 1
make[1]: *** [fs/reiserfs] Error 2
make: *** [fs] Error 2

Reverting ec191574b9c3cb7bfb95e4f803b63f7c8dc52690
---
[PATCH] reiserfs: use generic_permission
    
Use the generic_permission code with a proper wrapper and callback instead
of having a local copy.
---
fixes the problem, but causes some warnings about unused symbols.