From: Thomas Gleixner <tglx@linutronix.de>
To: "Andrew Cooper" <andrew.cooper3@citrix.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Steve Wahl" <steve.wahl@hpe.com>,
"Justin Ernst" <justin.ernst@hpe.com>,
"Kyle Meyer" <kyle.meyer@hpe.com>,
"Dimitri Sivanich" <dimitri.sivanich@hpe.com>,
"Russ Anderson" <russ.anderson@hpe.com>,
"Darren Hart" <dvhart@infradead.org>,
"Andy Shevchenko" <andy@infradead.org>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Wei Liu" <wei.liu@kernel.org>,
"Dexuan Cui" <decui@microsoft.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Rob Herring" <robh@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>
Cc: linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH 1/3] x86/apic: Drop apic::delivery_mode
Date: Sat, 04 Nov 2023 20:13:26 +0100 [thread overview]
Message-ID: <8734xljprd.ffs@tglx> (raw)
In-Reply-To: <20231102-x86-apic-v1-1-bf049a2a0ed6@citrix.com>
On Thu, Nov 02 2023 at 12:26, Andrew Cooper wrote:
> This field is set to APIC_DELIVERY_MODE_FIXED in all cases, and is read
> exactly once. Fold the constant in uv_program_mmr() and drop the field.
>
> Searching for the origin of the stale HyperV comment reveals commit
> a31e58e129f7 ("x86/apic: Switch all APICs to Fixed delivery mode") which
> notes:
>
> As a consequence of this change, the apic::irq_delivery_mode field is
> now pointless, but this needs to be cleaned up in a separate patch.
>
> 6 years is long enough for this technical debt to have survived.
Guilty as charged. :)
Thanks for spotting this and cleaning it up!
tglx
next prev parent reply other threads:[~2023-11-04 19:13 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-02 12:26 [PATCH 0/3] x86/apic: Misc pruning Andrew Cooper
2023-11-02 12:26 ` [PATCH 1/3] x86/apic: Drop apic::delivery_mode Andrew Cooper
2023-11-03 20:15 ` Steve Wahl
2023-11-04 19:13 ` Thomas Gleixner [this message]
2023-11-21 8:43 ` [tip: x86/apic] " tip-bot2 for Andrew Cooper
2023-11-21 12:04 ` Borislav Petkov
2023-11-21 12:18 ` x86/apic: Further apic::delivery_mode cleanup Andrew Cooper
2023-11-21 12:30 ` [PATCH RESEND] " Andrew Cooper
2023-11-21 18:04 ` [tip: x86/apic] x86/apic: Drop apic::delivery_mode tip-bot2 for Andrew Cooper
2023-11-02 12:26 ` [PATCH 2/3] x86/apic: Drop enum apic_delivery_modes Andrew Cooper
2023-11-03 20:15 ` Steve Wahl
2023-11-21 8:43 ` [tip: x86/apic] " tip-bot2 for Andrew Cooper
2023-11-21 18:04 ` tip-bot2 for Andrew Cooper
2023-11-02 12:26 ` [PATCH 3/3] x86/apic: Drop struct local_apic Andrew Cooper
2023-11-03 20:16 ` Steve Wahl
2023-11-14 11:32 ` Ilpo Järvinen
2023-11-21 8:43 ` [tip: x86/apic] " tip-bot2 for Andrew Cooper
2023-11-21 18:04 ` tip-bot2 for Andrew Cooper
2023-11-03 19:58 ` Notes on BAD_APICID, Was: [PATCH 0/3] x86/apic: Misc pruning Andrew Cooper
2023-11-04 19:15 ` Thomas Gleixner
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