1 files changed, 10 insertions, 65 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index 06f8e63f6cb1..c6f54e4c4290 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -27,6 +27,7 @@
 #include <linux/ramfs.h>
 #include <linux/log2.h>
 #include <linux/idr.h>
+#include <linux/fs_struct.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 #include "pnode.h"
@@ -397,11 +398,10 @@ static void __mnt_unmake_readonly(struct vfsmount *mnt)
         spin_unlock(&vfsmount_lock);
 }
 
-int simple_set_mnt(struct vfsmount *mnt, struct super_block *sb)
+void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb)
 {
         mnt->mnt_sb = sb;
         mnt->mnt_root = dget(sb->s_root);
-        return 0;
 }
 
 EXPORT_SYMBOL(simple_set_mnt);
@@ -780,6 +780,7 @@ static void show_mnt_opts(struct seq_file *m, struct vfsmount *mnt)
                 { MNT_NOATIME, ",noatime" },
                 { MNT_NODIRATIME, ",nodiratime" },
                 { MNT_RELATIME, ",relatime" },
+                { MNT_STRICTATIME, ",strictatime" },
                 { 0, NULL }
         };
         const struct proc_fs_info *fs_infop;
@@ -1919,6 +1920,9 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
         if (data_page)
                 ((char *)data_page)[PAGE_SIZE - 1] = 0;
 
+        /* Default to relatime */
+        mnt_flags |= MNT_RELATIME;
+
         /* Separate the per-mountpoint flags */
         if (flags & MS_NOSUID)
                 mnt_flags |= MNT_NOSUID;
@@ -1930,13 +1934,14 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
                 mnt_flags |= MNT_NOATIME;
         if (flags & MS_NODIRATIME)
                 mnt_flags |= MNT_NODIRATIME;
-        if (flags & MS_RELATIME)
-                mnt_flags |= MNT_RELATIME;
+        if (flags & MS_STRICTATIME)
+                mnt_flags &= ~(MNT_RELATIME | MNT_NOATIME);
         if (flags & MS_RDONLY)
                 mnt_flags |= MNT_READONLY;
 
         flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE |
-                   MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT);
+                   MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT |
+                   MS_STRICTATIME);
 
         /* ... and get the mountpoint */
         retval = kern_path(dir_name, LOOKUP_FOLLOW, &path);
@@ -2089,66 +2094,6 @@ out1:
 }
 
 /*
- * Replace the fs->{rootmnt,root} with {mnt,dentry}. Put the old values.
- * It can block. Requires the big lock held.
- */
-void set_fs_root(struct fs_struct *fs, struct path *path)
-{
-        struct path old_root;
-
-        write_lock(&fs->lock);
-        old_root = fs->root;
-        fs->root = *path;
-        path_get(path);
-        write_unlock(&fs->lock);
-        if (old_root.dentry)
-                path_put(&old_root);
-}
-
-/*
- * Replace the fs->{pwdmnt,pwd} with {mnt,dentry}. Put the old values.
- * It can block. Requires the big lock held.
- */
-void set_fs_pwd(struct fs_struct *fs, struct path *path)
-{
-        struct path old_pwd;
-
-        write_lock(&fs->lock);
-        old_pwd = fs->pwd;
-        fs->pwd = *path;
-        path_get(path);
-        write_unlock(&fs->lock);
-
-        if (old_pwd.dentry)
-                path_put(&old_pwd);
-}
-
-static void chroot_fs_refs(struct path *old_root, struct path *new_root)
-{
-        struct task_struct *g, *p;
-        struct fs_struct *fs;
-
-        read_lock(&tasklist_lock);
-        do_each_thread(g, p) {
-                task_lock(p);
-                fs = p->fs;
-                if (fs) {
-                        atomic_inc(&fs->count);
-                        task_unlock(p);
-                        if (fs->root.dentry == old_root->dentry
-                            && fs->root.mnt == old_root->mnt)
-                                set_fs_root(fs, new_root);
-                        if (fs->pwd.dentry == old_root->dentry
-                            && fs->pwd.mnt == old_root->mnt)
-                                set_fs_pwd(fs, new_root);
-                        put_fs_struct(fs);
-                } else
-                        task_unlock(p);
-        } while_each_thread(g, p);
-        read_unlock(&tasklist_lock);
-}
-
-/*
  * pivot_root Semantics:
  * Moves the root file system of the current process to the directory put_old,
  * makes new_root as the new root file system of the current process, and sets