From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Joel Stanley <joel@jms.id.au>, linuxppc-dev@lists.ozlabs.org
Subject: Re: powerpc: Use SWITCH_FRAME_SIZE for prom and rtas entry
Date: Mon, 15 Oct 2018 15:01:10 +1100 (AEDT) [thread overview]
Message-ID: <42YPr63M75zB4MZ@ozlabs.org> (raw)
In-Reply-To: <20181012024406.20658-1-joel@jms.id.au>
On Fri, 2018-10-12 at 02:44:06 UTC, Joel Stanley wrote:
> Commit 6c1719942e19 ("powerpc/of: Remove useless register save/restore
> when calling OF back") removed the saving of srr0 and srr1 when calling
> into OpenFirmware. Commit e31aa453bbc4 ("powerpc: Use LOAD_REG_IMMEDIATE
> only for constants on 64-bit") did the same for rtas.
>
> This means we don't need to save the extra stack space and can use
> the common SWITCH_FRAME_SIZE.
>
> There were already no users of _SRR0 and _SRR1 so we can remove them
> too.
>
> Link: https://github.com/linuxppc/linux/issues/83
> Signed-off-by: Joel Stanley <joel@jms.id.au>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/ed9e84a4d703243a232e6549a13ded
cheers
prev parent reply other threads:[~2018-10-15 4:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-12 2:44 [PATCH] powerpc: Use SWITCH_FRAME_SIZE for prom and rtas entry Joel Stanley
2018-10-15 4:01 ` Michael Ellerman [this message]
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