linux-kernel - Re: [PATCH][next][V2] rtc: msc313: Fix unintentional sign extension issues with left shift of a u16

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Message-Id: <163312374938.6051.17877024620555330727.b4-ty@bootlin.com>
Date:   Fri,  1 Oct 2021 23:29:41 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     linux-rtc@...r.kernel.org, Colin King <colin.king@...onical.com>,
        Romain Perier <romain.perier@...il.com>,
        Nobuhiro Iwamatsu <iwamatsu@...auri.org>,
        linux-arm-kernel@...ts.infradead.org,
        Daniel Palmer <daniel@...ngy.jp>
Cc:     Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH][next][V2] rtc: msc313: Fix unintentional sign extension issues with left shift of a u16

On Tue, 28 Sep 2021 14:46:54 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Shifting the u16 value returned by readw by 16 bits to the left
> will be promoted to a 32 bit signed int and then sign-extended
> to an unsigned long. If the top bit of the readw is set then
> the shifted value will be sign extended and the top 32 bits of
> the result will be set.
> 
> [...]

Applied, thanks!

[1/1] rtc: msc313: Fix unintentional sign extension issues with left shift of a u16
      commit: f3606687b447c41d28a011c98373b62b1cd52345

Best regards,
-- 
Alexandre Belloni <alexandre.belloni@...tlin.com>