linux-kernel - Re: [PATCH v2] kheaders: making headers archive reproducible

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Date:   Fri, 4 Oct 2019 17:18:46 +0200
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     Dmitry Goldin <dgoldin@...tonmail.ch>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "joel@...lfernandes.org" <joel@...lfernandes.org>,
        Ben Hutchings <ben@...adent.org.uk>
Subject: Re: [PATCH v2] kheaders: making headers archive reproducible

On Fri, Oct 04, 2019 at 10:40:07AM +0000, Dmitry Goldin wrote:
> From: Dmitry Goldin <dgoldin+lkml@...tonmail.ch>
> 
> In commit 43d8ce9d65a5 ("Provide in-kernel headers to make
> extending kernel easier") a new mechanism was introduced, for kernels
> >=5.2, which embeds the kernel headers in the kernel image or a module
> and exposes them in procfs for use by userland tools.
> 
> The archive containing the header files has nondeterminism caused by
> header files metadata. This patch normalizes the metadata and utilizes
> KBUILD_BUILD_TIMESTAMP if provided and otherwise falls back to the
> default behaviour.
> 
> In commit f7b101d33046 ("kheaders: Move from proc to sysfs") it was
> modified to use sysfs and the script for generation of the archive was
> renamed to what is being patched.
> 
> Signed-off-by: Dmitry Goldin <dgoldin+lkml@...tonmail.ch>


Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>