From e9c31b32f1cc6d3aa190119103622fb8e4c257b1 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Wed, 18 Jul 2012 10:35:05 -0700 Subject: [PATCH] debug: Do not permit CONFIG_DEBUG_STACK_USAGE=y on IA64 or PARISC The stack_not_used() function in assumes that stacks grow downwards. This is not true on IA64 or PARISC, so this function would walk off in the wrong direction and into the weeds. Found on IA64 because of a compilation failure with recursive dependencies on IA64_TASKSIZE and IA64_THREAD_INFO_SIZE. Fixing the code is possible, but should be combined with other infrastructure additions to set up the "canary" at the end of the stack. Reported-by: Fengguang Wu (failed allmodconfig build) Signed-off-by: Tony Luck --- lib/Kconfig.debug | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index a42d3ae..5d3e328 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -694,7 +694,7 @@ config STACKTRACE config DEBUG_STACK_USAGE bool "Stack utilization instrumentation" - depends on DEBUG_KERNEL + depends on DEBUG_KERNEL && !IA64 && !PARISC help Enables the display of the minimum amount of free stack which each task has ever had available in the sysrq-T and sysrq-P debug output. -- 2.7.4