linux-kernel - Re: [PATCH v8 15/18] nitro_enclaves: Add Makefile for the Nitro Enclaves driver

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Date:   Mon, 7 Sep 2020 18:05:23 +0300
From:   "Paraschiv, Andra-Irina" <andraprs@...zon.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     linux-kernel <linux-kernel@...r.kernel.org>,
        Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        David Duncan <davdunc@...zon.com>,
        Bjoern Doebel <doebel@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        "Frank van der Linden" <fllinden@...zon.com>,
        Alexander Graf <graf@...zon.de>,
        "Karen Noel" <knoel@...hat.com>,
        Martin Pohlack <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Balbir Singh <sblbir@...zon.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "Stefan Hajnoczi" <stefanha@...hat.com>,
        Stewart Smith <trawets@...zon.com>,
        "Uwe Dannowski" <uwed@...zon.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        kvm <kvm@...r.kernel.org>,
        ne-devel-upstream <ne-devel-upstream@...zon.com>
Subject: Re: [PATCH v8 15/18] nitro_enclaves: Add Makefile for the Nitro
 Enclaves driver



On 07/09/2020 17:08, Greg KH wrote:
>
> On Mon, Sep 07, 2020 at 04:35:23PM +0300, Paraschiv, Andra-Irina wrote:
>>
>> On 07/09/2020 12:00, Greg KH wrote:
>>>
>>> On Fri, Sep 04, 2020 at 08:37:15PM +0300, Andra Paraschiv wrote:
>>>> Signed-off-by: Andra Paraschiv <andraprs@...zon.com>
>>>> Reviewed-by: Alexander Graf <graf@...zon.com>
>>>> ---
>>>> Changelog
>>>>
>>>> v7 -> v8
>>>>
>>>> * No changes.
>>>>
>>>> v6 -> v7
>>>>
>>>> * No changes.
>>>>
>>>> v5 -> v6
>>>>
>>>> * No changes.
>>>>
>>>> v4 -> v5
>>>>
>>>> * No changes.
>>>>
>>>> v3 -> v4
>>>>
>>>> * No changes.
>>>>
>>>> v2 -> v3
>>>>
>>>> * Remove the GPL additional wording as SPDX-License-Identifier is
>>>>     already in place.
>>>>
>>>> v1 -> v2
>>>>
>>>> * Update path to Makefile to match the drivers/virt/nitro_enclaves
>>>>     directory.
>>>> ---
>>>>    drivers/virt/Makefile                |  2 ++
>>>>    drivers/virt/nitro_enclaves/Makefile | 11 +++++++++++
>>>>    2 files changed, 13 insertions(+)
>>>>    create mode 100644 drivers/virt/nitro_enclaves/Makefile
>>>>
>>>> diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile
>>>> index fd331247c27a..f28425ce4b39 100644
>>>> --- a/drivers/virt/Makefile
>>>> +++ b/drivers/virt/Makefile
>>>> @@ -5,3 +5,5 @@
>>>>
>>>>    obj-$(CONFIG_FSL_HV_MANAGER) += fsl_hypervisor.o
>>>>    obj-y                                += vboxguest/
>>>> +
>>>> +obj-$(CONFIG_NITRO_ENCLAVES) += nitro_enclaves/
>>>> diff --git a/drivers/virt/nitro_enclaves/Makefile b/drivers/virt/nitro_enclaves/Makefile
>>>> new file mode 100644
>>>> index 000000000000..e9f4fcd1591e
>>>> --- /dev/null
>>>> +++ b/drivers/virt/nitro_enclaves/Makefile
>>>> @@ -0,0 +1,11 @@
>>>> +# SPDX-License-Identifier: GPL-2.0
>>>> +#
>>>> +# Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
>>>> +
>>>> +# Enclave lifetime management support for Nitro Enclaves (NE).
>>>> +
>>>> +obj-$(CONFIG_NITRO_ENCLAVES) += nitro_enclaves.o
>>>> +
>>>> +nitro_enclaves-y := ne_pci_dev.o ne_misc_dev.o
>>>> +
>>>> +ccflags-y += -Wall
>>> That flag is _really_ risky over time, are you _SURE_ that all new
>>> versions of clang and gcc will never produce any warnings?  People work
>>> to fix up build warnings quite quickly for new compilers, you shouldn't
>>> prevent the code from being built at all just for that, right?
>>>
>> That would also need Werror, to have warnings treated as errors and prevent
>> building the codebase. If it's about something more, just let me know.
> No, you are right, Werror would be needed here too.
>
> W=1 gives you -Wall if you really want that, no need to add it by hand.

Good, we are on the some page then. :) Thanks for the heads-up with 
regard to the W=1 option.

Andra



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