linux-kernel - [PATCH 2/3] x86/documentation: Remove STACKFAULT

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Message-Id: <1432223353-19008-2-git-send-email-bp@alien8.de>
Date:	Thu, 21 May 2015 17:49:12 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Michal Marek <mmarek@...e.cz>,
	Peter Zijlstra <peterz@...radead.org>, X86 ML <x86@...nel.org>,
	live-patching@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Brian Gerst <brgerst@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 2/3] x86/documentation: Remove STACKFAULT_STACK bulletpoint

From: Borislav Petkov <bp@...e.de>

Update the documentation after

  6f442be2fb22 ("x86_64, traps: Stop using IST for #SS").

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Michal Marek <mmarek@...e.cz>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: X86 ML <x86@...nel.org>
Cc: live-patching@...r.kernel.org
Cc: lkml <linux-kernel@...r.kernel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
 Documentation/x86/kernel-stacks | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/Documentation/x86/kernel-stacks b/Documentation/x86/kernel-stacks
index e3c8a49d1a2f..c3c935b9d56e 100644
--- a/Documentation/x86/kernel-stacks
+++ b/Documentation/x86/kernel-stacks
@@ -1,3 +1,6 @@
+Kernel stacks on x86-64 bit
+---------------------------
+
 Most of the text from Keith Owens, hacked by AK
 
 x86_64 page size (PAGE_SIZE) is 4K.
@@ -56,13 +59,6 @@ If that assumption is ever broken then the stacks will become corrupt.
 
 The currently assigned IST stacks are :-
 
-* STACKFAULT_STACK.  EXCEPTION_STKSZ (PAGE_SIZE).
-
-  Used for interrupt 12 - Stack Fault Exception (#SS).
-
-  This allows the CPU to recover from invalid stack segments. Rarely
-  happens.
-
 * DOUBLEFAULT_STACK.  EXCEPTION_STKSZ (PAGE_SIZE).
 
   Used for interrupt 8 - Double Fault Exception (#DF).
-- 
2.3.5

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