[PATCH 2/3] rseq: remove redundant access_ok()

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

After commit 8f2817701492 ("rseq: Use get_user/put_user rather
than __get_user/__put_user") we no longer need
an access_ok() call from __rseq_handle_notify_resume()

Signed-off-by: Eric Dumazet <eduma...@google.com>
Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: "Paul E. McKenney" <paul...@kernel.org>
Cc: Boqun Feng <boqun.f...@gmail.com>
Cc: Arjun Roy <arjun...@google.com>
Cc: Ingo Molnar <mi...@kernel.org>
---
 kernel/rseq.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/rseq.c b/kernel/rseq.c
index 
d2689ccbb132c0fc8ec0924008771e5ee1ca855e..57344f9abb43905c7dd2b6081205ff508d963e1e
 100644
--- a/kernel/rseq.c
+++ b/kernel/rseq.c
@@ -273,8 +273,6 @@ void __rseq_handle_notify_resume(struct ksignal *ksig, 
struct pt_regs *regs)
 
        if (unlikely(t->flags & PF_EXITING))
                return;
-       if (unlikely(!access_ok(t->rseq, sizeof(*t->rseq))))
-               goto error;
        ret = rseq_ip_fixup(regs);
        if (unlikely(ret < 0))
                goto error;
-- 
2.31.1.295.g9ea45b61b8-goog