From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 16/21] arm64: KVM: Add compatibility aliases
Date: Wed, 02 Dec 2015 15:23:56 +0000 [thread overview]
Message-ID: <565F0D0C.9010801@arm.com> (raw)
In-Reply-To: <20151202114920.GB18376@cbox>
On 02/12/15 11:49, Christoffer Dall wrote:
> On Fri, Nov 27, 2015 at 06:50:10PM +0000, Marc Zyngier wrote:
>> So far, we've implemented the new world switch with a completely
>> different namespace, so that we could have both implementation
>> compiled in.
>>
>> Let's take things one step further by adding weak aliases that
>> have the same names as the original implementation. The weak
>> attributes allows the new implementation to be overriden by the
>> old one, and everything still work.
>
> Do I understand correctly that the whole point of this is to keep
> everything compiling nicely while at the same time being able to split
> the patches so that you can have an isolated "remove old code" patch
> that doesn't have to change the callers?
Exactly.
> If so, I think explaining this rationale would be helpful in the commit
> message in case we have to go back and track these changes in connection
> with a regression and don't remember why we did things this way.
Fair enough. I'll update the commit message (possibly by stealing a
large part of the above text!).
> Maybe I'm being over-cautious though...
>
> Otherwise:
>
> Acked-by: Christoffer Dall <christoffer.dall@linaro•org>
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2015-12-02 15:23 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-27 18:49 [PATCH v2 00/21] arm64: KVM: world switch in C Marc Zyngier
2015-11-27 18:49 ` [PATCH v2 01/21] arm64: Add macros to read/write system registers Marc Zyngier
2015-11-30 20:00 ` Christoffer Dall
2015-11-27 18:49 ` [PATCH v2 02/21] arm64: KVM: Add a HYP-specific header file Marc Zyngier
2015-11-30 20:00 ` Christoffer Dall
2015-12-01 11:41 ` Marc Zyngier
2015-12-01 11:47 ` Christoffer Dall
2015-11-27 18:49 ` [PATCH v2 03/21] arm64: KVM: Implement vgic-v2 save/restore Marc Zyngier
2015-11-30 20:00 ` Christoffer Dall
2015-12-01 11:39 ` Marc Zyngier
2015-11-27 18:49 ` [PATCH v2 04/21] arm64: KVM: Implement vgic-v3 save/restore Marc Zyngier
2015-11-30 9:59 ` Alex Bennée
2015-11-30 10:43 ` Marc Zyngier
2015-11-30 19:50 ` Christoffer Dall
2015-12-01 11:32 ` Marc Zyngier
2015-12-01 11:44 ` Christoffer Dall
2015-12-01 11:50 ` Christoffer Dall
2015-12-01 11:57 ` Marc Zyngier
2015-12-01 12:24 ` Christoffer Dall
2015-12-01 12:49 ` Marc Zyngier
2015-12-01 11:54 ` Marc Zyngier
2015-11-27 18:49 ` [PATCH v2 05/21] arm64: KVM: Implement timer save/restore Marc Zyngier
2015-11-30 19:59 ` Christoffer Dall
2015-12-01 11:34 ` Marc Zyngier
2015-11-27 18:50 ` [PATCH v2 06/21] arm64: KVM: Implement system register save/restore Marc Zyngier
2015-12-01 15:53 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 07/21] arm64: KVM: Implement 32bit " Marc Zyngier
2015-12-01 15:52 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 08/21] arm64: KVM: Implement debug save/restore Marc Zyngier
2015-11-30 12:00 ` Alex Bennée
2015-11-30 12:24 ` Marc Zyngier
2015-12-01 12:56 ` Christoffer Dall
2015-12-01 13:06 ` Marc Zyngier
2015-12-01 13:19 ` Alex Bennée
2015-12-01 13:34 ` Marc Zyngier
2015-12-01 14:47 ` Christoffer Dall
2015-12-01 14:56 ` Christoffer Dall
2015-12-01 15:01 ` Marc Zyngier
2015-12-01 15:41 ` Christoffer Dall
2015-12-01 18:34 ` Marc Zyngier
2015-11-27 18:50 ` [PATCH v2 09/21] arm64: KVM: Implement guest entry Marc Zyngier
2015-12-01 15:29 ` Christoffer Dall
2015-12-01 18:41 ` Marc Zyngier
2015-11-27 18:50 ` [PATCH v2 10/21] arm64: KVM: Add patchable function selector Marc Zyngier
2015-12-01 15:39 ` Christoffer Dall
2015-12-01 18:51 ` Marc Zyngier
2015-12-02 9:27 ` Christoffer Dall
2015-12-02 9:47 ` Marc Zyngier
2015-12-02 11:53 ` Christoffer Dall
2015-12-02 13:19 ` Marc Zyngier
2015-12-02 16:19 ` Christoffer Dall
2015-12-02 22:34 ` Andrew Jones
2015-12-03 8:18 ` Marc Zyngier
2015-11-27 18:50 ` [PATCH v2 11/21] arm64: KVM: Implement the core world switch Marc Zyngier
2015-12-01 15:55 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 12/21] arm64: KVM: Implement fpsimd save/restore Marc Zyngier
2015-12-02 11:53 ` Christoffer Dall
2015-12-02 15:29 ` Marc Zyngier
2015-12-02 16:19 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 13/21] arm64: KVM: Implement TLB handling Marc Zyngier
2015-12-02 11:53 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 14/21] arm64: KVM: HYP mode entry points Marc Zyngier
2015-12-02 11:53 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 15/21] arm64: KVM: Add panic handling Marc Zyngier
2015-12-02 11:53 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 16/21] arm64: KVM: Add compatibility aliases Marc Zyngier
2015-12-02 11:49 ` Christoffer Dall
2015-12-02 15:23 ` Marc Zyngier [this message]
2015-11-27 18:50 ` [PATCH v2 17/21] arm64: KVM: Map the kernel RO section into HYP Marc Zyngier
2015-12-02 11:49 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 18/21] arm64: KVM: Move away from the assembly version of the world switch Marc Zyngier
2015-12-02 11:49 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 19/21] arm64: KVM: Turn system register numbers to an enum Marc Zyngier
2015-12-02 11:51 ` Christoffer Dall
2015-12-02 15:26 ` Marc Zyngier
2015-11-27 18:50 ` [PATCH v2 20/21] arm64: KVM: Cleanup asm-offset.c Marc Zyngier
2015-12-02 11:51 ` Christoffer Dall
2015-11-27 18:50 ` [PATCH v2 21/21] arm64: KVM: Remove weak attributes Marc Zyngier
2015-12-02 11:47 ` Christoffer Dall
2015-12-02 15:21 ` Marc Zyngier
2015-12-02 16:21 ` Christoffer Dall
2015-12-02 17:52 ` Marc Zyngier
2015-11-30 20:33 ` [PATCH v2 00/21] arm64: KVM: world switch in C Christoffer Dall
2015-12-01 3:19 ` Mario Smarduch
2015-12-01 9:58 ` Marc Zyngier
2015-12-01 12:00 ` Christoffer Dall
2015-12-01 17:51 ` Marc Zyngier
2015-12-01 19:34 ` Christoffer Dall
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