[PATCH 1/4] check_unsafe_exec: use while_each_thread() rather than next_thread()

[Oleg Nesterov <oleg@redhat.com>]

next_thread() should be avoided, change check_unsafe_exec()
to use while_each_thread(). This also saves 32 bytes.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 fs/exec.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/exec.c b/fs/exec.c
index 1dee8ef..0cd9c25 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1245,10 +1245,11 @@ static int check_unsafe_exec(struct linux_binprm *bprm)
 	if (current->no_new_privs)
 		bprm->unsafe |= LSM_UNSAFE_NO_NEW_PRIVS;
 
+	t = p;
 	n_fs = 1;
 	spin_lock(&p->fs->lock);
 	rcu_read_lock();
-	for (t = next_thread(p); t != p; t = next_thread(t)) {
+	while_each_thread(p, t) {
 		if (t->fs == p->fs)
 			n_fs++;
 	}
-- 
1.5.5.1