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authorAl Viro <viro@zeniv.linux.org.uk>2012-08-15 21:03:26 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-09-26 21:08:55 -0400
commit56007cae94f349387c088e738c7dcb6bc513063b (patch)
treeb501eb1cc30619cb1cc9828a18256808546389de /fs/open.c
parent1983e781da2f7f77906f4ccc2c3dc279cd61d1ff (diff)
downloadlinux-linaro-stable-56007cae94f349387c088e738c7dcb6bc513063b.tar.gz
move put_unused_fd() and fd_install() to fs/file.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/open.c')
-rw-r--r--fs/open.c44
1 files changed, 0 insertions, 44 deletions
diff --git a/fs/open.c b/fs/open.c
index e1f2cdb91a4d..c525bd0e65b6 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -803,50 +803,6 @@ struct file *dentry_open(const struct path *path, int flags,
}
EXPORT_SYMBOL(dentry_open);
-static void __put_unused_fd(struct files_struct *files, unsigned int fd)
-{
- struct fdtable *fdt = files_fdtable(files);
- __clear_open_fd(fd, fdt);
- if (fd < files->next_fd)
- files->next_fd = fd;
-}
-
-void put_unused_fd(unsigned int fd)
-{
- struct files_struct *files = current->files;
- spin_lock(&files->file_lock);
- __put_unused_fd(files, fd);
- spin_unlock(&files->file_lock);
-}
-
-EXPORT_SYMBOL(put_unused_fd);
-
-/*
- * Install a file pointer in the fd array.
- *
- * The VFS is full of places where we drop the files lock between
- * setting the open_fds bitmap and installing the file in the file
- * array. At any such point, we are vulnerable to a dup2() race
- * installing a file in the array before us. We need to detect this and
- * fput() the struct file we are about to overwrite in this case.
- *
- * It should never happen - if we allow dup2() do it, _really_ bad things
- * will follow.
- */
-
-void fd_install(unsigned int fd, struct file *file)
-{
- struct files_struct *files = current->files;
- struct fdtable *fdt;
- spin_lock(&files->file_lock);
- fdt = files_fdtable(files);
- BUG_ON(fdt->fd[fd] != NULL);
- rcu_assign_pointer(fdt->fd[fd], file);
- spin_unlock(&files->file_lock);
-}
-
-EXPORT_SYMBOL(fd_install);
-
static inline int build_open_flags(int flags, umode_t mode, struct open_flags *op)
{
int lookup_flags = 0;