linux-kernel - Re: [PATCH] riscv: mm: fix truncates issue on RV32

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Message-Id: <168917713755.21773.10817207313937867675.b4-ty@rivosinc.com>
Date:   Wed, 12 Jul 2023 08:52:17 -0700
From:   Palmer Dabbelt <palmer@...osinc.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jisheng Zhang <jszhang@...nel.org>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Randy Dunlap <rdunlap@...radead.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] riscv: mm: fix truncates issue on RV32


On Mon, 10 Jul 2023 01:10:36 +0800, Jisheng Zhang wrote:
> lkp reports below sparse warning when building for RV32:
> arch/riscv/mm/init.c:1204:48: sparse: warning: cast truncates bits from
> constant value (100000000 becomes 0)
> 
> IMO, the reason we didn't see this truncates bug in real world is "0"
> means MEMBLOCK_ALLOC_ACCESSIBLE in memblock and there's no RV32 HW
> with more than 4GB memory.
> 
> [...]

Applied, thanks!

[1/1] riscv: mm: fix truncates issue on RV32
      https://git.kernel.org/palmer/c/b690e266dae2

Best regards,
-- 
Palmer Dabbelt <palmer@...osinc.com>