From d1a1dc0be866219f7a613c6368c6a036b8eefe03 Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Mon, 1 Jul 2013 13:04:42 -0700 Subject: consolidate per-arch stack overflow debugging options Original posting: http://lkml.kernel.org/r/20121214184202.F54094D9@kernel.stglabs.ibm.com Several architectures have similar stack debugging config options. They all pretty much do the same thing, some with slightly differing help text. This patch changes the architectures to instead enable a Kconfig boolean, and then use that boolean in the generic Kconfig.debug to present the actual menu option. This removes a bunch of duplication and adds consistency across arches. Signed-off-by: Dave Hansen Reviewed-by: H. Peter Anvin Reviewed-by: James Hogan Acked-by: Chris Metcalf [for tile] Signed-off-by: Dave Hansen Signed-off-by: Linus Torvalds --- lib/Kconfig.debug | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'lib') diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 566cf2bc08ea..cc443bc6edfc 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1475,6 +1475,27 @@ config ASYNC_RAID6_TEST If unsure, say N. +config HAVE_DEBUG_STACKOVERFLOW + bool + +config DEBUG_STACKOVERFLOW + bool "Check for stack overflows" + depends on DEBUG_KERNEL && HAVE_DEBUG_STACKOVERFLOW + ---help--- + Say Y here if you want to check for overflows of kernel, IRQ + and exception stacks (if your archicture uses them). This + option will show detailed messages if free stack space drops + below a certain limit. + + These kinds of bugs usually occur when call-chains in the + kernel get too deep, especially when interrupts are + involved. + + Use this in cases where you see apparently random memory + corruption, especially if it appears in 'struct thread_info' + + If in doubt, say "N". + source "samples/Kconfig" source "lib/Kconfig.kgdb" -- cgit v1.2.3