From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] powerpc: Only make kernel text pages of linear mapping executable
Date: Thu, 28 Aug 2008 16:58:21 +1000 [thread overview]
Message-ID: <1219906701.13162.304.camel@pasglop> (raw)
In-Reply-To: <18614.18410.958014.376185@cargo.ozlabs.ibm.com>
On Thu, 2008-08-28 at 16:38 +1000, Paul Mackerras wrote:
> Commit bc033b63bbfeb6c4b4eb0a1d083c650e4a0d2af8 ("powerpc/mm: Fix
> attribute confusion with htab_bolt_mapping()") moved the check for
> whether we should make pages of the linear mapping executable from
> htab_bolt_mapping into its callers, including htab_initialize.
> A side-effect of this is that the decision is now made once for
> each contiguous section in the LMB array rather than for each page
> individually. This can often mean that the whole of the linear
> mapping ends up being executable.
>
> This reverts to the previous behaviour, where individual pages are
> checked for being part of the kernel text or not, by moving the check
> back down into htab_bolt_mapping.
>
> Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
prev parent reply other threads:[~2008-08-28 6:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-28 6:38 [PATCH] powerpc: Only make kernel text pages of linear mapping executable Paul Mackerras
2008-08-28 6:58 ` Benjamin Herrenschmidt [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1219906701.13162.304.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.