From: Borislav Petkov <[email protected]>
Update the documentation after
6f442be2fb22 ("x86_64, traps: Stop using IST for #SS").
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: X86 ML <[email protected]>
Cc: [email protected]
Cc: lkml <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Andrew Morton <[email protected]>
---
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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