linux-kernel - Re: [PATCH] ARM: mvebu: check the validation of memory allocation

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Message-ID: <tencent_3A32A3E4AA726450348797294DFCCB81600A@qq.com>
Date:   Sun, 1 May 2022 15:01:58 +0800
From:   <xkernel.wang@...mail.com>
To:     <linux@...linux.org.uk>
Cc:     <andrew@...n.ch>, <gregory.clement@...tlin.com>,
        <sebastian.hesselbarth@...il.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: mvebu: check the validation of memory allocation

On Friday, April 29, 2022 11:19 PM +0800, linux@...linux.org.uk wrote:
> Are these failures silent, or will they be reported in the kernel log to
> make their failure obvious to those who debug the kernel?

According to chapter 14 of the coding style document:
"These generic allocation functions all emit a stack dump on failure when used
without __GFP_NOWARN so there is no use in emitting an additional failure
message when NULL is returned."

I think that these failures are not silent since __GFP_NOWARN is not
enabled.

Regards,
Xiaoke Wang