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tcp: Remove stale locking comment for TFO.

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The listener -> child locking no longer exists in the fast path
since commit e994b2f0fb ("tcp: do not lock listener to process
SYN packets").

Let's remove the stale comment for reqsk_fastopen_remove().

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250923005441.4131554-1-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima
2025-09-23 00:54:19 +00:00
committed by Jakub Kicinski
parent e8ab231782
commit dc1dea796b
1 changed files with 1 additions and 3 deletions
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4
net/core/request_sock.c
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@@ -77,9 +77,7 @@ void reqsk_queue_alloc(struct request_sock_queue *queue)
* a simple spin lock - one must consider sock_owned_by_user() and arrange
* to use sk_add_backlog() stuff. But what really makes it infeasible is the
* locking hierarchy violation. E.g., inet_csk_listen_stop() may try to
* acquire a child's lock while holding listener's socket lock. A corner
* case might also exist in tcp_v4_hnd_req() that will trigger this locking
* order.
* acquire a child's lock while holding listener's socket lock.
*
* This function also sets "treq->tfo_listener" to false.
* treq->tfo_listener is used by the listener so it is protected by the