From: tip-bot for Jan Beulich <JBeulich@suse.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
torvalds@linux-foundation.org, jbeulich@suse.com,
rostedt@goodmis.org, heukelum@mailshack.com, JBeulich@suse.com,
tglx@linutronix.de
Subject: [tip:x86/urgent] x86-64: Fix unwind annotations in recent NMI changes
Date: Thu, 24 Jan 2013 04:27:00 -0800 [thread overview]
Message-ID: <tip-444723dccc3c855fe88ea138cdec46f30e707b74@git.kernel.org> (raw)
In-Reply-To: <51010C9302000078000B9045@nat28.tlf.novell.com>
Commit-ID: 444723dccc3c855fe88ea138cdec46f30e707b74
Gitweb: http://git.kernel.org/tip/444723dccc3c855fe88ea138cdec46f30e707b74
Author: Jan Beulich <JBeulich@suse.com>
AuthorDate: Thu, 24 Jan 2013 09:27:31 +0000
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 24 Jan 2013 10:56:32 +0100
x86-64: Fix unwind annotations in recent NMI changes
While in one case a plain annotation is necessary, in the other
case the stack adjustment can simply be folded into the
immediately preceding RESTORE_ALL, thus getting the correct
annotation for free.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Alexander van Heukelum <heukelum@mailshack.com>
Link: http://lkml.kernel.org/r/51010C9302000078000B9045@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/kernel/entry_64.S | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 07a7a04..cb3c591 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1781,6 +1781,7 @@ first_nmi:
* Leave room for the "copied" frame
*/
subq $(5*8), %rsp
+ CFI_ADJUST_CFA_OFFSET 5*8
/* Copy the stack frame to the Saved frame */
.rept 5
@@ -1863,10 +1864,8 @@ end_repeat_nmi:
nmi_swapgs:
SWAPGS_UNSAFE_STACK
nmi_restore:
- RESTORE_ALL 8
-
- /* Pop the extra iret frame */
- addq $(5*8), %rsp
+ /* Pop the extra iret frame at once */
+ RESTORE_ALL 6*8
/* Clear the NMI executing stack variable */
movq $0, 5*8(%rsp)
prev parent reply other threads:[~2013-01-24 12:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-24 9:27 [PATCH] x86-64: fix unwind annotations in recent NMI changes Jan Beulich
2013-01-24 12:27 ` tip-bot for Jan Beulich [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=tip-444723dccc3c855fe88ea138cdec46f30e707b74@git.kernel.org \
--to=jbeulich@suse.com \
--cc=heukelum@mailshack.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.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