From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Paul Walmsley <paul.walmsley@sifive.com>,
Guo Ren <guoren@kernel.org>,
linux-riscv@lists.infradead.org,
Michael Ellerman <mpe@ellerman.id.au>,
linux-arch@vger.kernel.org, Palmer Dabbelt <palmer@dabbelt.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH] asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
Date: Fri, 17 Jul 2020 11:43:43 +0100 [thread overview]
Message-ID: <159497652409.524891.6561966096386113237.b4-ty@kernel.org> (raw)
In-Reply-To: <20200716112816.7356-1-will@kernel.org>
On Thu, 16 Jul 2020 12:28:16 +0100, Will Deacon wrote:
> Although mmiowb() is concerned only with serialising MMIO writes occuring
> in contexts where a spinlock is held, the call to mmiowb_set_pending()
> from the MMIO write accessors can occur in preemptible contexts, such
> as during driver probe() functions where ordering between CPUs is not
> usually a concern, assuming that the task migration path provides the
> necessary ordering guarantees.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
https://git.kernel.org/arm64/c/bd024e82e4cd
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>
Cc: linux-arch@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
catalin.marinas@arm.com, Paul Walmsley <paul.walmsley@sifive.com>,
Guo Ren <guoren@kernel.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Palmer Dabbelt <palmer@dabbelt.com>,
linux-riscv@lists.infradead.org, kernel-team@android.com
Subject: Re: [PATCH] asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
Date: Fri, 17 Jul 2020 11:43:43 +0100 [thread overview]
Message-ID: <159497652409.524891.6561966096386113237.b4-ty@kernel.org> (raw)
In-Reply-To: <20200716112816.7356-1-will@kernel.org>
On Thu, 16 Jul 2020 12:28:16 +0100, Will Deacon wrote:
> Although mmiowb() is concerned only with serialising MMIO writes occuring
> in contexts where a spinlock is held, the call to mmiowb_set_pending()
> from the MMIO write accessors can occur in preemptible contexts, such
> as during driver probe() functions where ordering between CPUs is not
> usually a concern, assuming that the task migration path provides the
> necessary ordering guarantees.
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()
https://git.kernel.org/arm64/c/bd024e82e4cd
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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next prev parent reply other threads:[~2020-07-17 10:44 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 11:28 [PATCH] asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible() Will Deacon
2020-07-16 11:28 ` Will Deacon
2020-07-16 11:54 ` Emil Renner Berthing
2020-07-16 11:54 ` Emil Renner Berthing
2020-07-16 19:00 ` Palmer Dabbelt
2020-07-16 19:00 ` Palmer Dabbelt
2020-07-16 19:00 ` Palmer Dabbelt
2020-07-17 10:43 ` Will Deacon [this message]
2020-07-17 10:43 ` Will Deacon
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