linux-kernel - Re: [PATCH] ARM: kexec: Fix panic after TLB are invalidated

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Message-ID: <20210205004535.GB3319@p4>
Date:   Fri, 5 Feb 2021 00:45:36 +0000
From:   Giancarlo Ferrari <giancarlo.ferrari89@...il.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Mark Rutland <mark.rutland@....com>, linux-kernel@...r.kernel.org,
        penberg@...nel.org, geert@...ux-m68k.org, rppt@...nel.org,
        akpm@...ux-foundation.org, linux-arm-kernel@...ts.infradead.org,
        giancarlo.ferrari@...ia.com
Subject: Re: [PATCH] ARM: kexec: Fix panic after TLB are invalidated

Sorry for polluting,

On Fri, Feb 05, 2021 at 12:40:54AM +0000, Giancarlo Ferrari wrote:
> Russell,
> 
> On Fri, Feb 05, 2021 at 12:18:33AM +0000, Russell King - ARM Linux admin wrote:
> > On Thu, Feb 04, 2021 at 11:48:42PM +0000, Giancarlo Ferrari wrote:
> > > Can I ask about having it integrated ?
> > 
> > Thanks for testing. Are you willing for me to add:
> > 
> > Tested-by: Giancarlo Ferrari <giancarlo.ferrari89@...il.com>
> > 
> > to the commit log?
> > 
> 
> Sure.
> 
> I have a question regarding the patch. I saw that the structure start at
> the end of the relocation code:
> 
> data = reboot_code_buffer + relocate_new_kernel_size;
> 
> which means it overlap with the global symbol relocate_new_kernel_size.
> I think is minor comment as the variable is only used in the fncpy()
> then thrown away. Something like:
> 
> data = reboot_code_buffer + relocate_new_kernel_size + sizeof(long);
> 
> and accordingly in the instruction (arch/arm/kernel/relocate_kernel.S):
> 
> adr	r7, relocate_new_kernel_end
> 

my fault. Do as I didn't talk... one is in virtual memory the other in the
initial code.

> > I can move it into the fixes branch which I want to send to Linus by
> > Saturday at the very latest.
> > 
> 
> I am not used with all the merging process. However it sounds great !
> 
> > -- 
> > RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> > FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
> 
> Thanks in advance,
> 
> 
> GF

Thanks,


GF