From: "H. Peter Anvin" <hpa@zytor.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Nadav Amit <namit@vmware.com>, Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
linux_dti@icloud.com, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
Andy Lutomirski <luto@kernel.org>,
Kees Cook <keescook@chromium.org>,
Dave Hansen <dave.hansen@intel.com>,
Masami Hiramatsu <mhiramat@kernel.org>
Subject: Re: [PATCH v5 02/10] x86/jump_label: Use text_poke_early() during early init
Date: Tue, 20 Nov 2018 10:23:01 -0800 [thread overview]
Message-ID: <34f7e083-218e-dbdf-73ca-47dd11e750cc@zytor.com> (raw)
In-Reply-To: <20181120181830.GB2131@hirez.programming.kicks-ass.net>
On 11/20/18 10:18 AM, Peter Zijlstra wrote:
>>
>> Can't we make this test in text_poke() directly, please?
>
> He does that in 9/10 iirc.
>
No, in 9/10 he does that change locally for the jump_label, but there is
absolutely no reason not to do that test in text_poke() proper, and
simply use text_poke() everywhere in the kernel.
-hpa
next prev parent reply other threads:[~2018-11-20 18:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-13 13:07 [PATCH v5 00/10] x86/alternative: text_poke() fixes Nadav Amit
2018-11-13 13:07 ` [PATCH v5 01/10] Fix "x86/alternatives: Lockdep-enforce text_mutex in text_poke*()" Nadav Amit
2018-11-13 13:07 ` [PATCH v5 02/10] x86/jump_label: Use text_poke_early() during early init Nadav Amit
2018-11-20 18:10 ` H. Peter Anvin
2018-11-20 18:18 ` Peter Zijlstra
2018-11-20 18:23 ` H. Peter Anvin [this message]
2018-11-20 18:47 ` Nadav Amit
2018-11-13 13:07 ` [PATCH v5 03/10] x86/mm: temporary mm struct Nadav Amit
2018-11-13 13:07 ` [PATCH v5 04/10] fork: provide a function for copying init_mm Nadav Amit
2018-11-13 13:07 ` [PATCH v5 05/10] x86/alternative: initializing temporary mm for patching Nadav Amit
2018-11-13 13:07 ` [PATCH v5 06/10] x86/alternative: use temporary mm for text poking Nadav Amit
2018-11-13 13:07 ` [PATCH v5 07/10] x86/kgdb: avoid redundant comparison of patched code Nadav Amit
2018-11-13 13:07 ` [PATCH v5 08/10] x86: avoid W^X being broken during modules loading Nadav Amit
2018-11-13 13:07 ` [PATCH v5 09/10] x86/jump-label: remove support for custom poker Nadav Amit
2018-11-13 13:07 ` [PATCH v5 10/10] x86/alternative: remove the return value of text_poke_*() Nadav Amit
2018-11-20 12:42 ` [PATCH v5 00/10] x86/alternative: text_poke() fixes Peter Zijlstra
2018-11-20 18:52 ` Nadav Amit
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=34f7e083-218e-dbdf-73ca-47dd11e750cc@zytor.com \
--to=hpa@zytor.com \
--cc=bp@alien8.de \
--cc=dave.hansen@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=keescook@chromium.org \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=linux_dti@icloud.com \
--cc=luto@kernel.org \
--cc=mhiramat@kernel.org \
--cc=mingo@redhat.com \
--cc=namit@vmware.com \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).