linux-kernel - Re: [PATCH v9 0/4] RISC-V: mm: Make SV48 the default address space

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Date:   Wed, 9 Aug 2023 08:42:58 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Charlie Jenkins <charlie@...osinc.com>
CC:     <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <conor@...nel.org>, <paul.walmsley@...ive.com>,
        <palmer@...osinc.com>, <aou@...s.berkeley.edu>,
        <anup@...infault.org>, <konstantin@...uxfoundation.org>,
        <linux-doc@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
        <linux-mm@...ck.org>, <mick@....forth.gr>, <jrtc27@...c27.com>,
        <rdunlap@...radead.org>, <alexghiti@...osinc.com>
Subject: Re: [PATCH v9 0/4] RISC-V: mm: Make SV48 the default address space

On Tue, Aug 08, 2023 at 06:51:06PM -0700, Charlie Jenkins wrote:
> Make sv48 the default address space for mmap as some applications
> currently depend on this assumption. Users can now select a
> desired address space using a non-zero hint address to mmap. Previously,
> requesting the default address space from mmap by passing zero as the hint
> address would result in using the largest address space possible. Some
> applications depend on empty bits in the virtual address space, like Go and
> Java, so this patch provides more flexibility for application developers.

This still does not build:
../fs/binfmt_flat.c:900:30: error: call to undeclared function 'is_compat_task'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Reproduceable with allmodconfig.


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