linux-kernel - Re: [PATCH 4.19 00/18] 4.19.234-rc1 review

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Date:   Thu, 10 Mar 2022 10:51:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Stable <stable@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Shuah Khan <shuah@...nel.org>, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, Pavel Machek <pavel@...x.de>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Florian Fainelli <f.fainelli@...il.com>, slade@...dewatkins.com
Subject: Re: [PATCH 4.19 00/18] 4.19.234-rc1 review

On Thu, Mar 10, 2022 at 09:41:18AM +0000, Sudip Mukherjee wrote:
> On Thu, Mar 10, 2022 at 9:18 AM Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> >
> > On Wed, Mar 09, 2022 at 06:15:08PM +0000, Sudip Mukherjee wrote:
> > > On Wed, Mar 9, 2022 at 6:08 PM Sudip Mukherjee
> > > <sudipm.mukherjee@...il.com> wrote:
> > > >
> > > > Hi Greg,
> > > >
> > > > On Wed, Mar 9, 2022 at 4:03 PM Greg Kroah-Hartman
> > > > <gregkh@...uxfoundation.org> wrote:
> > > > >
> > > > > This is the start of the stable review cycle for the 4.19.234 release.
> > > > > There are 18 patches in this series, all will be posted as a response
> > > > > to this one.  If anyone has any issues with these being applied, please
> > > > > let me know.
> > > > >
> > > > > Responses should be made by Fri, 11 Mar 2022 15:58:48 +0000.
> > > > > Anything received after that time might be too late.
> > > >
> > > > My tests are still running, but just an initial result for you,
> > > >
> > > > x86_64 defconfig fails with:
> > > > arch/x86/kernel/cpu/bugs.c: In function 'spectre_v2_select_mitigation':
> > > > arch/x86/kernel/cpu/bugs.c:973:41: error: implicit declaration of
> > > > function 'unprivileged_ebpf_enabled'
> > > > [-Werror=implicit-function-declaration]
> > > >   973 |         if (mode == SPECTRE_V2_EIBRS && unprivileged_ebpf_enabled())
> > >
> > > And, lots of failures in arm builds also.
> > > Error:
> > > arch/arm/common/secure_cntvoff.S: Assembler messages:
> > > arch/arm/common/secure_cntvoff.S:24: Error: co-processor register
> > > expected -- `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/common/secure_cntvoff.S:27: Error: co-processor register
> > > expected -- `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/common/secure_cntvoff.S:29: Error: co-processor register
> > > expected -- `mcr p15,0,r0,c7,r5,4'
> > > make[1]: *** [scripts/Makefile.build:403:
> > > arch/arm/common/secure_cntvoff.o] Error 1
> > > make[1]: *** Waiting for unfinished jobs....
> > > arch/arm/kernel/entry-common.S: Assembler messages:
> > > arch/arm/kernel/entry-common.S:178: Error: co-processor register
> > > expected -- `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/kernel/entry-common.S:187: Error: co-processor register
> > > expected -- `mcr p15,0,r0,c7,r5,4'
> > > make[1]: *** [scripts/Makefile.build:403:
> > > arch/arm/kernel/entry-common.o] Error 1
> > > make[1]: *** Waiting for unfinished jobs....
> > > arch/arm/mm/cache-v7.S: Assembler messages:
> > > arch/arm/mm/cache-v7.S:64: Error: co-processor register expected --
> > > `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/mm/cache-v7.S:137: Error: co-processor register expected --
> > > `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/mm/cache-v7.S:171: Error: co-processor register expected --
> > > `mcr p15,0,r0,c7,r5,4'
> > > arch/arm/mm/cache-v7.S:299: Error: co-processor register expected --
> > > `mcr p15,0,r0,c7,r5,4'
> > > make[1]: *** [scripts/Makefile.build:403: arch/arm/mm/cache-v7.o] Error 1
> >
> > All clang builds for arm are known to fail, and some arm64 clang builds
> > will also fail.  I have seen initial patches for arm64, will let the
> > clang developers come up with the arm fix as I have no idea how to
> > handle that.  This just mirrors Linus's tree right now :)
> >
> > Unless this is gcc?
> 
> This is gcc version 11.2.1 20220301
> 
> Guenter has also reported the same: "Almost all arm builds, all
> branches from 4.9.y to 5.16.y:"

Sorry, my email was stalled yesterday.  The fix for this should now be
in the queue, I'm doing some more build testing right now before I'll
release -rc2 for all branches.

thanks,

greg k-h