linux-kernel - Re: [PATCH net] page_pool: fix inconsistency for page_pool_ring

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Message-Id: <168489961948.3716.18030218604369017925.git-patchwork-notify@kernel.org>
Date:   Wed, 24 May 2023 03:40:19 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Yunsheng Lin <linyunsheng@...wei.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        hawk@...nel.org, ilias.apalodimas@...aro.org, edumazet@...gle.com,
        lorenzo@...nel.org, daniel@...earbox.net, john.fastabend@...il.com
Subject: Re: [PATCH net] page_pool: fix inconsistency for
 page_pool_ring_[un]lock()

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Mon, 22 May 2023 11:17:14 +0800 you wrote:
> page_pool_ring_[un]lock() use in_softirq() to decide which
> spin lock variant to use, and when they are called in the
> context with in_softirq() being false, spin_lock_bh() is
> called in page_pool_ring_lock() while spin_unlock() is
> called in page_pool_ring_unlock(), because spin_lock_bh()
> has disabled the softirq in page_pool_ring_lock(), which
> causes inconsistency for spin lock pair calling.
> 
> [...]

Here is the summary with links:
  - [net] page_pool: fix inconsistency for page_pool_ring_[un]lock()
    https://git.kernel.org/netdev/net/c/368d3cb406cd

You are awesome, thank you!
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