take close-on-exec logics to fs/file.c, clean it up a bit

... and add cond_resched() there, while we are at it.  We can
get large latencies as is...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 35 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 574cf4d..f2b6af5 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1006,40 +1006,6 @@ no_thread_group:
 	return 0;
 }
 
-/*
- * These functions flushes out all traces of the currently running executable
- * so that a new one can be started
- */
-static void flush_old_files(struct files_struct * files)
-{
-	long j = -1;
-	struct fdtable *fdt;
-
-	spin_lock(&files->file_lock);
-	for (;;) {
-		unsigned long set, i;
-
-		j++;
-		i = j * BITS_PER_LONG;
-		fdt = files_fdtable(files);
-		if (i >= fdt->max_fds)
-			break;
-		set = fdt->close_on_exec[j];
-		if (!set)
-			continue;
-		fdt->close_on_exec[j] = 0;
-		spin_unlock(&files->file_lock);
-		for ( ; set ; i++,set >>= 1) {
-			if (set & 1) {
-				sys_close(i);
-			}
-		}
-		spin_lock(&files->file_lock);
-
-	}
-	spin_unlock(&files->file_lock);
-}
-
 char *get_task_comm(char *buf, struct task_struct *tsk)
 {
 	/* buf must be at least sizeof(tsk->comm) in size */
@@ -1050,6 +1016,11 @@ char *get_task_comm(char *buf, struct task_struct *tsk)
 }
 EXPORT_SYMBOL_GPL(get_task_comm);
 
+/*
+ * These functions flushes out all traces of the currently running executable
+ * so that a new one can be started
+ */
+
 void set_task_comm(struct task_struct *tsk, char *buf)
 {
 	task_lock(tsk);
@@ -1171,7 +1142,7 @@ void setup_new_exec(struct linux_binprm * bprm)
 	current->self_exec_id++;
 			
 	flush_signal_handlers(current, 0);
-	flush_old_files(current->files);
+	do_close_on_exec(current->files);
 }
 EXPORT_SYMBOL(setup_new_exec);