From: Greg KH <gregkh@linuxfoundation.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
will@kernel.org, mark.rutland@arm.com, catalin.marinas@arm.com
Subject: Re: [PATCH] arm64: cpufeature: Fix truncating a feature value
Date: Fri, 11 Oct 2019 06:55:38 +0200 [thread overview]
Message-ID: <20191011045538.GA977916@kroah.com> (raw)
In-Reply-To: <20191010131943.26822-1-suzuki.poulose@arm.com>
On Thu, Oct 10, 2019 at 02:19:43PM +0100, Suzuki K Poulose wrote:
> A signed feature value is truncated to turn to an unsigned value
> causing bad state in the system wide infrastructure. This affects
> the discovery of FP/ASIMD support on arm64. Fix this by making sure
> we cast it properly.
>
> This was inadvertently fixed upstream in v4.6 onwards with the following :
> commit 28c5dcb22f90113dea ("arm64: Rename cpuid_feature field extract routines")
What prevents us from just taking that commit instead? You did not
document that here at all, which I thought I asked for.
Also, you only need 12 digits for a sha1, 28c5dcb22f90 ("arm64: Rename
cpuid_feature field extract routines") would be just fine :)
thanks,
greg k-h
next prev parent reply other threads:[~2019-10-11 4:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-10 11:08 [PATCH] arm64: cpufeature: Fix truncating a feature value Suzuki K Poulose
2019-10-10 11:12 ` Suzuki K Poulose
2019-10-10 12:29 ` Greg KH
2019-10-10 12:46 ` Suzuki K Poulose
2019-10-10 13:16 ` Greg KH
2019-10-10 13:19 ` Suzuki K Poulose
2019-10-11 4:55 ` Greg KH [this message]
2019-10-11 10:31 ` Suzuki K Poulose
2019-10-11 12:13 ` Greg KH
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