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From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>,
	linux-tip-commits@vger.kernel.org, linux-kernel@vger.kernel.org,
	keescook@chromium.org, ast@plumgrid.com, fweisbec@gmail.com,
	oleg@redhat.com, tglx@linutronix.de,
	torvalds@linux-foundation.org, hpa@zytor.com, wad@chromium.org,
	rostedt@goodmis.org
Subject: Re: [tip:x86/asm] x86/asm/entry/64: Remove unused thread_struct::usersp
Date: Tue, 17 Mar 2015 08:13:16 +0100	[thread overview]
Message-ID: <20150317071316.GA22758@gmail.com> (raw)
In-Reply-To: <20150317070830.GA19645@pd.tnic>


* Borislav Petkov <bp@alien8.de> wrote:

> On Mon, Mar 16, 2015 at 11:20:38PM +0100, Denys Vlasenko wrote:
> > What's your config?
> 
> Attached.

Could you try just this patch (on top of broken tip:master):

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 66a1954439ea..997e6a1c288f 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -496,6 +496,7 @@ struct thread_struct {
 #ifdef CONFIG_X86_32
 	unsigned long		sysenter_cs;
 #else
+	unsigned long		usersp;	/* Copy from PDA */
 	unsigned short		es;
 	unsigned short		ds;
 	unsigned short		fsindex;

to see whether it's the changed values of old_rsp, or the change in 
sizeof(thread_struct), that causes the regression?

Thanks,

	Ingo

  reply	other threads:[~2015-03-17  7:13 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-10 10:45 [PATCH 2/4] x86: entry_64.S: remove stub_iopl Denys Vlasenko
2015-03-10 10:45 ` [PATCH 4/4] x86: entry_64.S: remove unused thread_struct::usersp Denys Vlasenko
2015-03-11 12:55   ` Borislav Petkov
2015-03-11 15:19     ` Denys Vlasenko
2015-03-16 12:05   ` [tip:x86/asm] x86/asm/entry/64: Remove unused thread_struct:: usersp tip-bot for Denys Vlasenko
2015-03-16 16:47     ` Borislav Petkov
2015-03-16 22:20       ` [tip:x86/asm] x86/asm/entry/64: Remove unused thread_struct::usersp Denys Vlasenko
2015-03-17  7:08         ` Borislav Petkov
2015-03-17  7:13           ` Ingo Molnar [this message]
2015-03-17  7:21             ` Ingo Molnar
2015-03-17  7:39               ` Borislav Petkov
2015-03-17 12:22                 ` Denys Vlasenko
2015-03-17 12:51                   ` Denys Vlasenko
2015-03-17  7:51               ` Ingo Molnar
2015-03-17  8:06                 ` Borislav Petkov
2015-03-17  8:27                   ` Ingo Molnar
2015-03-17  9:01                     ` Borislav Petkov
2015-03-11 12:08 ` [PATCH 2/4] x86: entry_64.S: remove stub_iopl Borislav Petkov
2015-03-16 12:05 ` [tip:x86/asm] x86/asm/entry/64: Remove stub_iopl tip-bot for Denys Vlasenko

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