From: Daniel Borkmann <daniel@iogearbox.net>
Date: Thu, 19 Dec 2019 15:20:49 +0000 (+0100)
Subject: Merge branch 'bpf-fix-xsk-wakeup'
X-Git-Tag: v5.5-rc3~7^2~18^2~3
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ca8d0fa7cfb8abc4f623d49df210e0b81b32f626;p=users%2Fwilly%2Fxarray.git

Merge branch 'bpf-fix-xsk-wakeup'

Maxim Mikityanskiy says:

====================
This series addresses the issue described in the commit message of the
first patch: lack of synchronization between XSK wakeup and destroying
the resources used by XSK wakeup. The idea is similar to napi_synchronize.
The series contains fixes for the drivers that implement XSK.

v2 incorporates changes suggested by Björn:

1. Call synchronize_rcu in Intel drivers only if the XDP program is
   being unloaded.
2. Don't forget rcu_read_lock when wakeup is called from xsk_poll.
3. Use xs->zc as the condition to call ndo_xsk_wakeup.
====================

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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ca8d0fa7cfb8abc4f623d49df210e0b81b32f626