[PATCH] tiny: Make x86 doublefault handling optional

This adds configurable support for doublefault reporting on x86

add/remove: 0/3 grow/shrink: 0/1 up/down: 0/-13048 (-13048)
function                                     old     new   delta
cpu_init                                     846     786     -60
doublefault_fn                               188       -    -188
doublefault_stack                           4096       -   -4096
doublefault_tss                             8704       -   -8704

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 0c9932f9f06b..0eb65f2ad8c9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -309,6 +309,15 @@ config BUG
           option for embedded systems with no facilities for reporting errors.
           Just say Y.
 
+config DOUBLEFAULT
+        depends X86
+        default y if X86
+        bool "Enable doublefault exception handler" if EMBEDDED
+        help
+          This option allows trapping of rare doublefault exceptions that
+          would otherwise cause a system to silently reboot. Disabling this
+          option saves about 4k.
+
 config BASE_FULL
         default y
         bool "Enable full-sized data structures for core" if EMBEDDED