Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support

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Subject: Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 31 Jan 2022 04:26:13 -0800
Cc: palmer@xxxxxxxxxxx, arnd@xxxxxxxx, anup@xxxxxxxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx, liush@xxxxxxxxxxxxxxxxx, wefu@xxxxxxxxxx, drew@xxxxxxxxxxxxxxx, wangjunqiang@xxxxxxxxxxx, hch@xxxxxx, hch@xxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-csky@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
In-reply-to: <20220129121728.1079364-17-guoren@kernel.org>

Given that most rv64 implementations can't run in rv32 mode, what is the
failure mode if someone tries it with the compat mode enabled?

Follow-Ups:
- Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
  - From: Guo Ren

References:
- [PATCH V4 00/17] riscv: compat: Add COMPAT mode support for rv64
  - From: guoren
- [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
  - From: guoren

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