Commit d724a9a5 authored May 26, 2015 by Borislav Petkov Committed by Ingo Molnar May 27, 2015

x86/Documentation: Remove STACKFAULT_STACK bulletpoint

Update the documentation after

  6f442be2 ("x86_64, traps: Stop using IST for #SS").

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: live-patching@vger.kernel.org
Link: http://lkml.kernel.org/r/1432628901-18044-17-git-send-email-bp@alien8.de

Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 54fd1578

Documentation/x86/kernel-stacks

+3 −7

Original line number	Diff line number	Diff line
		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).