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Subject[PATCH] ia64: disable SCHED_STACK_END_CHECK
SCHED_STACK_END_CHECK assumes stack grows in one direction.
ia64 is a rare case where it is not.

As a result kernel fails at startup as:
Kernel panic - not syncing: corrupted stack end detected inside scheduler

The error does not find a real problem: it's register backing store
is written on top of canary value.

Disable SCHED_STACK_END_CHECK on ia64 as there is no good
place for canary without moving initial stack address.

CC: Tony Luck <>
CC: Fenghua Yu <>
CC: Andrew Morton <>
Signed-off-by: Sergei Trofimovich <>
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4966c4fbe7f7..a097dfe38d2b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1004,7 +1004,7 @@ config SCHEDSTATS

bool "Detect stack corruption on calls to schedule()"
- depends on DEBUG_KERNEL
+ depends on DEBUG_KERNEL && !IA64
default n
This option checks for a stack overrun on calls to schedule().
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