From: Borislav Petkov <bp@alien8.de>
To: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Andy Lutomirski <luto@amacapital.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Oleg Nesterov <oleg@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Alexei Starovoitov <ast@plumgrid.com>,
Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] x86: stop using PER_CPU_VAR(kernel_stack)
Date: Mon, 23 Mar 2015 18:14:44 +0100 [thread overview]
Message-ID: <20150323171443.GA3880@pd.tnic> (raw)
In-Reply-To: <551048E9.6060800@redhat.com>
On Mon, Mar 23, 2015 at 06:10:01PM +0100, Denys Vlasenko wrote:
> We want to get rid of kernel_stack, since it is redundant:
> in 64-bits, PER_CPU_VAR(cpu_tss + TSS_sp0) can be used instead,
> in 32-bits, PER_CPU_VAR(cpu_current_top_of_stack) can be used instead.
We probably should have a macro unifying those on both bitness.
Especially 64-bit is really non-telling - I can't really deduce from
"cpu_tss + TSS_sp0" that it is the kernel stack ptr.
Thanks.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
next prev parent reply other threads:[~2015-03-23 17:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-21 20:44 [PATCH 1/2] x86: stop using PER_CPU_VAR(kernel_stack) Denys Vlasenko
2015-03-21 20:44 ` [PATCH 2/2] x86: remove unused kernel_stack per-cpu variable Denys Vlasenko
2015-03-23 14:18 ` [PATCH 1/2] x86: stop using PER_CPU_VAR(kernel_stack) Steven Rostedt
2015-03-23 17:10 ` Denys Vlasenko
2015-03-23 17:14 ` Borislav Petkov [this message]
2015-03-23 17:28 ` Steven Rostedt
2015-03-23 17:38 ` Denys Vlasenko
2015-03-23 17:45 ` Steven Rostedt
2015-03-23 17:51 ` Denys Vlasenko
2015-03-23 18:27 ` Andy Lutomirski
2015-04-24 15:29 ` Denys Vlasenko
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=20150323171443.GA3880@pd.tnic \
--to=bp@alien8.de \
--cc=ast@plumgrid.com \
--cc=dvlasenk@redhat.com \
--cc=fweisbec@gmail.com \
--cc=hpa@zytor.com \
--cc=keescook@chromium.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@amacapital.net \
--cc=mingo@kernel.org \
--cc=oleg@redhat.com \
--cc=rostedt@goodmis.org \
--cc=torvalds@linux-foundation.org \
--cc=wad@chromium.org \
--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 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.