author: Linus Torvalds <torvalds@linux-foundation.org> 2017-11-17 12:54:01 -0800
committer: Linus Torvalds <torvalds@linux-foundation.org> 2017-11-17 12:54:01 -0800
commit: ca5b857cb0f42986520abd9dbb0c2508067342b2
parent: a0e136e5da98f10ecb41a673374a04102af45e2b
Commit Summary:
Diffstat:
1 file changed, 7 insertions, 5 deletions
diff --git a/fs/file.c b/fs/file.c
index 4eecbf4244a5..3b080834b870 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -593,13 +593,16 @@ void __fd_install(struct files_struct *files, unsigned int fd,
{
struct fdtable *fdt;
- might_sleep();
rcu_read_lock_sched();
- while (unlikely(files->resize_in_progress)) {
+ if (unlikely(files->resize_in_progress)) {
rcu_read_unlock_sched();
- wait_event(files->resize_wait, !files->resize_in_progress);
- rcu_read_lock_sched();
+ 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);
+ return;
}
/* coupled with smp_wmb() in expand_fdtable() */
smp_rmb();
@@ -632,7 +635,6 @@ int __close_fd(struct files_struct *files, unsigned fd)
if (!file)
goto out_unlock;
rcu_assign_pointer(fdt->fd[fd], NULL);
- __clear_close_on_exec(fd, fdt);
__put_unused_fd(files, fd);
spin_unlock(&files->file_lock);
return filp_close(file, files);