linux-kernel - Re: [PATCH RESEND] MIPS: Fix PKMAP with 32-bit MIPS huge page support

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Date:   Wed, 30 Jun 2021 14:42:14 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Wei Li <liwei391@...wei.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Paul Cercueil <paul@...pouillou.net>,
        Daniel Silsby <dansilsby@...il.com>,
        Paul Burton <paulburton@...nel.org>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        huawei.libin@...wei.com
Subject: Re: [PATCH RESEND] MIPS: Fix PKMAP with 32-bit MIPS huge page support

On Tue, Jun 29, 2021 at 10:14:20PM +0800, Wei Li wrote:
> When 32-bit MIPS huge page support is enabled, we halve the number of
> pointers a PTE page holds, making its last half go to waste.
> Correspondingly, we should halve the number of kmap entries, as we just
> initialized only a single pte table for that in pagetable_init().
> 
> Fixes: 35476311e529 ("MIPS: Add partial 32-bit huge page support")
> Signed-off-by: Wei Li <liwei391@...wei.com>
> ---
>  arch/mips/include/asm/highmem.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

applied to mips-next.

Thomas.

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