linux-kernel - Re: [PATCH v4] livepatch: Cleanup module page permission changes

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Message-ID: <20151204141704.GI14230@pathway.suse.cz>
Date:	Fri, 4 Dec 2015 15:17:04 +0100
From:	Petr Mladek <pmladek@...e.com>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Seth Jennings <sjenning@...hat.com>,
	Jiri Kosina <jikos@...nel.org>,
	Vojtech Pavlik <vojtech@...e.com>,
	linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Miroslav Benes <mbenes@...e.cz>
Subject: Re: [PATCH v4] livepatch: Cleanup module page permission changes

On Thu 2015-12-03 16:33:26, Josh Poimboeuf wrote:
> Calling set_memory_rw() and set_memory_ro() for every iteration of the
> loop in klp_write_object_relocations() is messy, inefficient, and
> error-prone.
> 
> Change all the read-only pages to read-write before the loop and convert
> them back to read-only again afterwards.
> 
> Suggested-by: Miroslav Benes <mbenes@...e.cz>
> Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>

This patch looks fine to me.

Reviewed-by: Petr Mladek <pmladek@...e.com>

Thanks,
Petr
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