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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-08-16 01:06:33 (GMT) |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-27 01:08:55 (GMT) |
| commit | f869e8a7f753e3fd43d6483e796774776f645edb (patch) | |
| tree | 3b215f30a040812eb7488bd4596a5c3ae0b50e51 /drivers | |
| parent | 56007cae94f349387c088e738c7dcb6bc513063b (diff) | |
| download | linux-f869e8a7f753e3fd43d6483e796774776f645edb.tar.xz | |
expose a low-level variant of fd_install() for binder
Similar situation to that of __alloc_fd(); do not use unless you
really have to. You should not touch any descriptor table other
than your own; it's a sure sign of a really bad API design.
As with __alloc_fd(), you *must* use a first-class reference to
struct files_struct; something obtained by get_files_struct(some task)
(let alone direct task->files) will not do. It must be either
current->files, or obtained by get_files_struct(current) by the
owner of that sucker and given to you.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/android/binder.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index 4946d28..9e1a98a 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -386,17 +386,8 @@ int task_get_unused_fd_flags(struct binder_proc *proc, int flags) static void task_fd_install( struct binder_proc *proc, unsigned int fd, struct file *file) { - struct files_struct *files = proc->files; - struct fdtable *fdt; - - if (files == NULL) - return; - - 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); + if (proc->files) + __fd_install(proc->files, fd, file); } /* |