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    Subject[PATCH 16/18] x86/documentation: Remove STACKFAULT_STACK bulletpoint
    Date
    From: Borislav Petkov <bp@suse.de>

    Update the documentation after

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

    Signed-off-by: Borislav Petkov <bp@suse.de>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Michal Marek <mmarek@suse.cz>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: X86 ML <x86@kernel.org>
    Cc: live-patching@vger.kernel.org
    Cc: lkml <linux-kernel@vger.kernel.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Andrew Morton <akpm@linux-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).
    --
    1.9.0.258.g00eda23


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