linux-kernel - Re: [PATCH 2/2] ALSA: compress_offload: avoid 64-bit get

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Message-ID: <Z2BVOUAPIr0+q0Fu@vaman>
Date: Mon, 16 Dec 2024 21:58:41 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	Amadeusz Sławiński <amadeuszx.slawinski@...ux.intel.com>,
	Arnd Bergmann <arnd@...db.de>, Yu Jiaoliang <yujiaoliang@...o.com>,
	Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
	linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ALSA: compress_offload: avoid 64-bit get_user()

On 16-12-24, 10:33, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> On some architectures, get_user() cannot read a 64-bit user variable:
> 
> arm-linux-gnueabi-ld: sound/core/compress_offload.o: in function `snd_compr_ioctl':
> compress_offload.c:(.text.snd_compr_ioctl+0x538): undefined reference to `__get_user_bad'
> 
> Use an equivalent copy_from_user() instead.

Acked-by: Vinod Koul <vkoul@...nel.org>

-- 
~Vinod