[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>
diff --git a/init/Kconfig b/init/Kconfig
index 0c9932f..0eb65f2 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -309,6 +309,15 @@
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