OMAP: dmtimer: enable all timers to be wakeup events

[linux-2.6-omap-h63xx.git] / fs / compat.c

diff --git a/fs/compat.c b/fs/compat.c
index 0949b43794a4896827dd70714d3b3b7b9a0ae6ed..55efdfebdf5ae14f5937add03075fdc8e716819d 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -378,6 +378,34 @@ out:
        return error;
 }
 
+/*
+ * This is a copy of sys_ustat, just dealing with a structure layout.
+ * Given how simple this syscall is that apporach is more maintainable
+ * than the various conversion hacks.
+ */
+asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
+{
+       struct super_block *sb;
+       struct compat_ustat tmp;
+       struct kstatfs sbuf;
+       int err;
+
+       sb = user_get_super(new_decode_dev(dev));
+       if (!sb)
+               return -EINVAL;
+       err = vfs_statfs(sb->s_root, &sbuf);
+       drop_super(sb);
+       if (err)
+               return err;
+
+       memset(&tmp, 0, sizeof(struct compat_ustat));
+       tmp.f_tfree = sbuf.f_bfree;
+       tmp.f_tinode = sbuf.f_ffree;
+       if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
+               return -EFAULT;
+       return 0;
+}
+
 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
 {
        if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
@@ -1392,12 +1420,17 @@ int compat_do_execve(char * filename,
 {
        struct linux_binprm *bprm;
        struct file *file;
+       struct files_struct *displaced;
        int retval;
 
+       retval = unshare_files(&displaced);
+       if (retval)
+               goto out_ret;
+
        retval = -ENOMEM;
        bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
        if (!bprm)
-               goto out_ret;
+               goto out_files;
 
        retval = mutex_lock_interruptible(&current->cred_exec_mutex);
        if (retval < 0)
@@ -1408,7 +1441,7 @@ int compat_do_execve(char * filename,
        bprm->cred = prepare_exec_creds();
        if (!bprm->cred)
                goto out_unlock;
-       check_unsafe_exec(bprm, current->files);
+       check_unsafe_exec(bprm);
 
        file = open_exec(filename);
        retval = PTR_ERR(file);
@@ -1459,6 +1492,8 @@ int compat_do_execve(char * filename,
        mutex_unlock(&current->cred_exec_mutex);
        acct_update_integrals(current);
        free_bprm(bprm);
+       if (displaced)
+               put_files_struct(displaced);
        return retval;
 
 out:
@@ -1478,6 +1513,9 @@ out_unlock:
 out_free:
        free_bprm(bprm);
 
+out_files:
+       if (displaced)
+               reset_files_struct(displaced);
 out_ret:
        return retval;
 }