[PATCH] kill altroot

long overdue...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

31 files changed, 5 insertions, 466 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 6c76e1ee9c45..095818089ac1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -31,7 +31,6 @@
 #include <linux/file.h>
 #include <linux/fcntl.h>
 #include <linux/device_cgroup.h>
-#include <asm/namei.h>
 #include <asm/uaccess.h>
 
 #define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
@@ -562,27 +561,16 @@ out_unlock:
         return result;
 }
 
-static int __emul_lookup_dentry(const char *, struct nameidata *);
-
 /* SMP-safe */
-static __always_inline int
+static __always_inline void
 walk_init_root(const char *name, struct nameidata *nd)
 {
         struct fs_struct *fs = current->fs;
 
         read_lock(&fs->lock);
-        if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-                nd->path = fs->altroot;
-                path_get(&fs->altroot);
-                read_unlock(&fs->lock);
-                if (__emul_lookup_dentry(name,nd))
-                        return 0;
-                read_lock(&fs->lock);
-        }
         nd->path = fs->root;
         path_get(&fs->root);
         read_unlock(&fs->lock);
-        return 1;
 }
 
 /*
@@ -623,12 +611,9 @@ static __always_inline int __vfs_follow_link(struct nameidata *nd, const char *l
 
         if (*link == '/') {
                 path_put(&nd->path);
-                if (!walk_init_root(link, nd))
-                        /* weird __emul_prefix() stuff did it */
-                        goto out;
+                walk_init_root(link, nd);
         }
         res = link_path_walk(link, nd);
-out:
         if (nd->depth || res || nd->last_type!=LAST_NORM)
                 return res;
         /*
@@ -1077,67 +1062,6 @@ static int path_walk(const char *name, struct nameidata *nd)
         return link_path_walk(name, nd);
 }
 
-/* 
- * SMP-safe: Returns 1 and nd will have valid dentry and mnt, if
- * everything is done. Returns 0 and drops input nd, if lookup failed;
- */
-static int __emul_lookup_dentry(const char *name, struct nameidata *nd)
-{
-        if (path_walk(name, nd))
-                return 0;               /* something went wrong... */
-
-        if (!nd->path.dentry->d_inode ||
-            S_ISDIR(nd->path.dentry->d_inode->i_mode)) {
-                struct path old_path = nd->path;
-                struct qstr last = nd->last;
-                int last_type = nd->last_type;
-                struct fs_struct *fs = current->fs;
-
-                /*
-                 * NAME was not found in alternate root or it's a directory.
-                 * Try to find it in the normal root:
-                 */
-                nd->last_type = LAST_ROOT;
-                read_lock(&fs->lock);
-                nd->path = fs->root;
-                path_get(&fs->root);
-                read_unlock(&fs->lock);
-                if (path_walk(name, nd) == 0) {
-                        if (nd->path.dentry->d_inode) {
-                                path_put(&old_path);
-                                return 1;
-                        }
-                        path_put(&nd->path);
-                }
-                nd->path = old_path;
-                nd->last = last;
-                nd->last_type = last_type;
-        }
-        return 1;
-}
-
-void set_fs_altroot(void)
-{
-        char *emul = __emul_prefix();
-        struct nameidata nd;
-        struct path path = {}, old_path;
-        int err;
-        struct fs_struct *fs = current->fs;
-
-        if (!emul)
-                goto set_it;
-        err = path_lookup(emul, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
-        if (!err)
-                path = nd.path;
-set_it:
-        write_lock(&fs->lock);
-        old_path = fs->altroot;
-        fs->altroot = path;
-        write_unlock(&fs->lock);
-        if (old_path.dentry)
-                path_put(&old_path);
-}
-
 /* Returns 0 and nd will be valid on success; Retuns error, otherwise. */
 static int do_path_lookup(int dfd, const char *name,
                                 unsigned int flags, struct nameidata *nd)
@@ -1153,14 +1077,6 @@ static int do_path_lookup(int dfd, const char *name,
 
         if (*name=='/') {
                 read_lock(&fs->lock);
-                if (fs->altroot.dentry && !(nd->flags & LOOKUP_NOALT)) {
-                        nd->path = fs->altroot;
-                        path_get(&fs->altroot);
-                        read_unlock(&fs->lock);
-                        if (__emul_lookup_dentry(name,nd))
-                                goto out; /* found in altroot */
-                        read_lock(&fs->lock);
-                }
                 nd->path = fs->root;
                 path_get(&fs->root);
                 read_unlock(&fs->lock);
@@ -1194,7 +1110,6 @@ static int do_path_lookup(int dfd, const char *name,
         }
 
         retval = path_walk(name, nd);
-out:
         if (unlikely(!retval && !audit_dummy_context() && nd->path.dentry &&
                                 nd->path.dentry->d_inode))
                 audit_inode(name, nd->path.dentry);
diff --git a/fs/namespace.c b/fs/namespace.c
index f30b11e2240e..c4fcf48acef8 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1972,7 +1972,7 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                 struct fs_struct *fs)
 {
         struct mnt_namespace *new_ns;
-        struct vfsmount *rootmnt = NULL, *pwdmnt = NULL, *altrootmnt = NULL;
+        struct vfsmount *rootmnt = NULL, *pwdmnt = NULL;
         struct vfsmount *p, *q;
 
         new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
@@ -2015,10 +2015,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                                 pwdmnt = p;
                                 fs->pwd.mnt = mntget(q);
                         }
-                        if (p == fs->altroot.mnt) {
-                                altrootmnt = p;
-                                fs->altroot.mnt = mntget(q);
-                        }
                 }
                 p = next_mnt(p, mnt_ns->root);
                 q = next_mnt(q, new_ns->root);
@@ -2029,8 +2025,6 @@ static struct mnt_namespace *dup_mnt_ns(struct mnt_namespace *mnt_ns,
                 mntput(rootmnt);
         if (pwdmnt)
                 mntput(pwdmnt);
-        if (altrootmnt)
-                mntput(altrootmnt);
 
         return new_ns;
 }
diff --git a/fs/open.c b/fs/open.c
index 8e02d42bfe44..d3a2a00f52dc 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -548,7 +548,7 @@ asmlinkage long sys_chroot(const char __user * filename)
         struct nameidata nd;
         int error;
 
-        error = __user_walk(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY | LOOKUP_NOALT, &nd);
+        error = __user_walk(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &nd);
         if (error)
                 goto out;
 
@@ -561,7 +561,6 @@ asmlinkage long sys_chroot(const char __user * filename)
                 goto dput_and_out;
 
         set_fs_root(current->fs, &nd.path);
-        set_fs_altroot();
         error = 0;
 dput_and_out:
         path_put(&nd.path);
diff --git a/include/asm-alpha/namei.h b/include/asm-alpha/namei.h
deleted file mode 100644
index 5cc9bb39499d..000000000000
--- a/include/asm-alpha/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 1996/12/13 14:48:21 jj Exp $
- * linux/include/asm-alpha/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __ALPHA_NAMEI_H
-#define __ALPHA_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __ALPHA_NAMEI_H */
diff --git a/include/asm-arm/namei.h b/include/asm-arm/namei.h
deleted file mode 100644
index a402d3b9d0f7..000000000000
--- a/include/asm-arm/namei.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* 
- * linux/include/asm-arm/namei.h
- *
- * Routines to handle famous /usr/gnemul
- * Derived from the Sparc version of this file
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __ASMARM_NAMEI_H
-#define __ASMARM_NAMEI_H
-
-#define ARM_BSD_EMUL "usr/gnemul/bsd/"
-
-static inline char *__emul_prefix(void)
-{
-        switch (current->personality) {
-        case PER_BSD:
-                return ARM_BSD_EMUL;
-        default:
-                return NULL;
-        }
-}
-
-#endif /* __ASMARM_NAMEI_H */
diff --git a/include/asm-avr32/namei.h b/include/asm-avr32/namei.h
deleted file mode 100644
index f0a26de06cab..000000000000
--- a/include/asm-avr32/namei.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef __ASM_AVR32_NAMEI_H
-#define __ASM_AVR32_NAMEI_H
-
-/* This dummy routine may be changed to something useful */
-#define __emul_prefix() NULL
-
-#endif /* __ASM_AVR32_NAMEI_H */
diff --git a/include/asm-blackfin/namei.h b/include/asm-blackfin/namei.h
deleted file mode 100644
index 8b89a2d65cb4..000000000000
--- a/include/asm-blackfin/namei.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * linux/include/asm/namei.h
- *
- * Included from linux/fs/namei.c
- *
- * Changes made by Lineo Inc.    May 2001
- */
-
-#ifndef __BFIN_NAMEI_H
-#define __BFIN_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif
diff --git a/include/asm-cris/namei.h b/include/asm-cris/namei.h
deleted file mode 100644
index 8a3be7a6d9f6..000000000000
--- a/include/asm-cris/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 2000/07/10 16:32:31 bjornw Exp $
- * linux/include/asm-cris/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __CRIS_NAMEI_H
-#define __CRIS_NAMEI_H
-
-/* used to find file-system prefixes for doing emulations
- * see for example asm-sparc/namei.h
- * we don't use it...
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __CRIS_NAMEI_H */
diff --git a/include/asm-frv/namei.h b/include/asm-frv/namei.h
deleted file mode 100644
index 4ea57171d951..000000000000
--- a/include/asm-frv/namei.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * include/asm-frv/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __ASM_NAMEI_H
-#define __ASM_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif
-
diff --git a/include/asm-h8300/namei.h b/include/asm-h8300/namei.h
deleted file mode 100644
index ab6f196db6e0..000000000000
--- a/include/asm-h8300/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-h8300/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __H8300_NAMEI_H
-#define __H8300_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif
diff --git a/include/asm-ia64/namei.h b/include/asm-ia64/namei.h
deleted file mode 100644
index 78e768079083..000000000000
--- a/include/asm-ia64/namei.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef _ASM_IA64_NAMEI_H
-#define _ASM_IA64_NAMEI_H
-
-/*
- * Modified 1998, 1999, 2001
- *      David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
- */
-
-#include <asm/ptrace.h>
-#include <asm/system.h>
-
-#define EMUL_PREFIX_LINUX_IA32 "/emul/ia32-linux/"
-
-static inline char *
-__emul_prefix (void)
-{
-        switch (current->personality) {
-              case PER_LINUX32:
-                return EMUL_PREFIX_LINUX_IA32;
-              default:
-                return NULL;
-        }
-}
-
-#endif /* _ASM_IA64_NAMEI_H */
diff --git a/include/asm-m32r/namei.h b/include/asm-m32r/namei.h
deleted file mode 100644
index 210f8056b805..000000000000
--- a/include/asm-m32r/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _ASM_M32R_NAMEI_H
-#define _ASM_M32R_NAMEI_H
-
-/*
- * linux/include/asm-m32r/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* _ASM_M32R_NAMEI_H */
diff --git a/include/asm-m68k/namei.h b/include/asm-m68k/namei.h
deleted file mode 100644
index f33f243b644a..000000000000
--- a/include/asm-m68k/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-m68k/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __M68K_NAMEI_H
-#define __M68K_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif
diff --git a/include/asm-m68knommu/namei.h b/include/asm-m68knommu/namei.h
deleted file mode 100644
index 31a85d27b931..000000000000
--- a/include/asm-m68knommu/namei.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-m68k/namei.h>
diff --git a/include/asm-mips/namei.h b/include/asm-mips/namei.h
deleted file mode 100644
index a6605a752469..000000000000
--- a/include/asm-mips/namei.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef _ASM_NAMEI_H
-#define _ASM_NAMEI_H
-
-/*
- * This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* _ASM_NAMEI_H */
diff --git a/include/asm-mn10300/namei.h b/include/asm-mn10300/namei.h
deleted file mode 100644
index bd9ce94aeb65..000000000000
--- a/include/asm-mn10300/namei.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* Emulation stuff
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#ifndef _ASM_NAMEI_H
-#define _ASM_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* _ASM_NAMEI_H */
diff --git a/include/asm-parisc/namei.h b/include/asm-parisc/namei.h
deleted file mode 100644
index 8d29b3d9fb33..000000000000
--- a/include/asm-parisc/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.1 1996/12/13 14:48:21 jj Exp $
- * linux/include/asm-parisc/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __PARISC_NAMEI_H
-#define __PARISC_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __PARISC_NAMEI_H */
diff --git a/include/asm-powerpc/namei.h b/include/asm-powerpc/namei.h
deleted file mode 100644
index 657443474a6a..000000000000
--- a/include/asm-powerpc/namei.h
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef _ASM_POWERPC_NAMEI_H
-#define _ASM_POWERPC_NAMEI_H
-
-#ifdef __KERNEL__
-
-/*
- * Adapted from include/asm-alpha/namei.h
- *
- * Included from fs/namei.c
- */
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif  /* __KERNEL__ */
-#endif  /* _ASM_POWERPC_NAMEI_H */
diff --git a/include/asm-s390/namei.h b/include/asm-s390/namei.h
deleted file mode 100644
index 3e286bdde4b0..000000000000
--- a/include/asm-s390/namei.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- *  include/asm-s390/namei.h
- *
- *  S390 version
- *
- *  Derived from "include/asm-i386/namei.h"
- *
- *  Included from linux/fs/namei.c
- */
-
-#ifndef __S390_NAMEI_H
-#define __S390_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __S390_NAMEI_H */
diff --git a/include/asm-sh/namei.h b/include/asm-sh/namei.h
deleted file mode 100644
index 338a5d947143..000000000000
--- a/include/asm-sh/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* $Id: namei.h,v 1.3 2000/07/04 06:24:49 gniibe Exp $
- * linux/include/asm-sh/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __ASM_SH_NAMEI_H
-#define __ASM_SH_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __ASM_SH_NAMEI_H */
diff --git a/include/asm-sparc/namei.h b/include/asm-sparc/namei.h
deleted file mode 100644
index eff944b8e321..000000000000
--- a/include/asm-sparc/namei.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef ___ASM_SPARC_NAMEI_H
-#define ___ASM_SPARC_NAMEI_H
-#if defined(__sparc__) && defined(__arch64__)
-#include <asm-sparc/namei_64.h>
-#else
-#include <asm-sparc/namei_32.h>
-#endif
-#endif
diff --git a/include/asm-sparc64/namei.h b/include/asm-sparc64/namei.h
deleted file mode 100644
index 1344a910ba2f..000000000000
--- a/include/asm-sparc64/namei.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-sparc/namei.h>
diff --git a/include/asm-um/namei.h b/include/asm-um/namei.h
deleted file mode 100644
index 002984d5bc85..000000000000
--- a/include/asm-um/namei.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __UM_NAMEI_H
-#define __UM_NAMEI_H
-
-#include "asm/arch/namei.h"
-
-#endif
diff --git a/include/asm-v850/namei.h b/include/asm-v850/namei.h
deleted file mode 100644
index ee8339b23843..000000000000
--- a/include/asm-v850/namei.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * linux/include/asm-v850/namei.h
- *
- * Included from linux/fs/namei.c
- */
-
-#ifndef __V850_NAMEI_H__
-#define __V850_NAMEI_H__
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* __V850_NAMEI_H__ */
diff --git a/include/asm-x86/namei.h b/include/asm-x86/namei.h
deleted file mode 100644
index 415ef5d9550e..000000000000
--- a/include/asm-x86/namei.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#ifndef _ASM_X86_NAMEI_H
-#define _ASM_X86_NAMEI_H
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif /* _ASM_X86_NAMEI_H */
diff --git a/include/asm-xtensa/namei.h b/include/asm-xtensa/namei.h
deleted file mode 100644
index 3fdff039d27d..000000000000
--- a/include/asm-xtensa/namei.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * include/asm-xtensa/namei.h
- *
- * Included from linux/fs/namei.c
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_NAMEI_H
-#define _XTENSA_NAMEI_H
-
-#ifdef __KERNEL__
-
-/* This dummy routine maybe changed to something useful
- * for /usr/gnemul/ emulation stuff.
- * Look at asm-sparc/namei.h for details.
- */
-
-#define __emul_prefix() NULL
-
-#endif  /* __KERNEL__ */
-#endif  /* _XTENSA_NAMEI_H */
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 282f54219129..9e5a06e78d02 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -7,7 +7,7 @@ struct fs_struct {
         atomic_t count;
         rwlock_t lock;
         int umask;
-        struct path root, pwd, altroot;
+        struct path root, pwd;
 };
 
 #define INIT_FS {                               \
@@ -19,7 +19,6 @@ struct fs_struct {
 extern struct kmem_cache *fs_cachep;
 
 extern void exit_fs(struct task_struct *);
-extern void set_fs_altroot(void);
 extern void set_fs_root(struct fs_struct *, struct path *);
 extern void set_fs_pwd(struct fs_struct *, struct path *);
 extern struct fs_struct *copy_fs_struct(struct fs_struct *);
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 3cf62d26d493..768773d57857 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -47,7 +47,6 @@ enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
 #define LOOKUP_DIRECTORY         2
 #define LOOKUP_CONTINUE          4
 #define LOOKUP_PARENT           16
-#define LOOKUP_NOALT            32
 #define LOOKUP_REVAL            64
 /*
  * Intent data
diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c
index c1ef192aa655..0d407e886735 100644
--- a/kernel/exec_domain.c
+++ b/kernel/exec_domain.c
@@ -168,7 +168,6 @@ __set_personality(u_long personality)
         current->personality = personality;
         oep = current_thread_info()->exec_domain;
         current_thread_info()->exec_domain = ep;
-        set_fs_altroot();
 
         module_put(oep->module);
         return 0;
diff --git a/kernel/exit.c b/kernel/exit.c
index 6cdf60712bd2..0caf590548a0 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -565,8 +565,6 @@ void put_fs_struct(struct fs_struct *fs)
         if (atomic_dec_and_test(&fs->count)) {
                 path_put(&fs->root);
                 path_put(&fs->pwd);
-                if (fs->altroot.dentry)
-                        path_put(&fs->altroot);
                 kmem_cache_free(fs_cachep, fs);
         }
 }
diff --git a/kernel/fork.c b/kernel/fork.c
index abb3ed6298f6..5e050c1317c4 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -657,13 +657,6 @@ static struct fs_struct *__copy_fs_struct(struct fs_struct *old)
                 path_get(&old->root);
                 fs->pwd = old->pwd;
                 path_get(&old->pwd);
-                if (old->altroot.dentry) {
-                        fs->altroot = old->altroot;
-                        path_get(&old->altroot);
-                } else {
-                        fs->altroot.mnt = NULL;
-                        fs->altroot.dentry = NULL;
-                }
                 read_unlock(&old->lock);
         }
         return fs;