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authorPaul Mundt <lethal@linux-sh.org>2009-07-11 20:05:34 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-07-11 20:05:34 +0900
commit9f14b84afda297d301b81a5bcbd65e83d7b02034 (patch)
treec9e65509cb06d0cda8c99c68421196f6b76e6b60 /arch/sh/Kconfig.debug
parent473d1cf4ee623b043790838bcf77e77958840bf2 (diff)
downloadvexpress-lsk-9f14b84afda297d301b81a5bcbd65e83d7b02034.tar.gz
sh: Replace DEBUG_STACKOVERFLOW with STACK_DEBUG.
STACK_DEBUG ties in to mcount in order to do function-granular stack overflow checks as opposed to lazily checking from IRQ context. As the default is nohz, the frequency of overflow checking is too irregular to catch much useful information, and so the mcount approach employed by sparc64 is adopted instead. This kills off the old check entirely from the do_IRQ() path and now adopts CONFIG_MCOUNT instead. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/Kconfig.debug')
-rw-r--r--arch/sh/Kconfig.debug17
1 files changed, 4 insertions, 13 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index 75b5f4e0667..b440fd93671 100644
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -61,12 +61,14 @@ config EARLY_PRINTK
select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using
the kernel command line option to toggle back and forth.
-config DEBUG_STACKOVERFLOW
+config STACK_DEBUG
bool "Check for stack overflows"
depends on DEBUG_KERNEL && SUPERH32
help
This option will cause messages to be printed if free stack space
- drops below a certain limit.
+ drops below a certain limit. Saying Y here will add overhead to
+ every function call and will therefore incur a major
+ performance hit. Most users should say N.
config DEBUG_STACK_USAGE
bool "Stack utilization instrumentation"
@@ -123,17 +125,6 @@ config SH64_SR_WATCH
bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
depends on SUPERH64
-config STACK_DEBUG
- bool "Enable diagnostic checks of the kernel stack"
- depends on FUNCTION_TRACER
- select DEBUG_STACKOVERFLOW
- default n
- help
- This option allows checks to be performed on the kernel stack
- at runtime. Saying Y here will add overhead to every function
- call and will therefore incur a major performance hit. Most
- users should say N.
-
config MCOUNT
def_bool y
depends on SUPERH32