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-rw-r--r--arch/s390/Kconfig14
-rw-r--r--arch/s390/include/asm/thread_info.h5
2 files changed, 6 insertions, 13 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 5f5c29269fb1..8116a3328a19 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -241,19 +241,17 @@ config PACK_STACK
Say Y if you are unsure.
config SMALL_STACK
- bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb"
- depends on PACK_STACK && !LOCKDEP
+ bool "Use 8kb for kernel stack instead of 16kb"
+ depends on PACK_STACK && 64BIT && !LOCKDEP
help
If you say Y here and the compiler supports the -mkernel-backchain
- option the kernel will use a smaller kernel stack size. For 31 bit
- the reduced size is 4kb instead of 8kb and for 64 bit it is 8kb
- instead of 16kb. This allows to run more thread on a system and
- reduces the pressure on the memory management for higher order
- page allocations.
+ option the kernel will use a smaller kernel stack size. The reduced
+ size is 8kb instead of 16kb. This allows to run more threads on a
+ system and reduces the pressure on the memory management for higher
+ order page allocations.
Say N if you are unsure.
-
config CHECK_STACK
bool "Detect kernel stack overflow"
help
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index de3fad60c682..c1eaf9604da7 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -15,13 +15,8 @@
* Size of kernel stack for each process
*/
#ifndef __s390x__
-#ifndef __SMALL_STACK
#define THREAD_ORDER 1
#define ASYNC_ORDER 1
-#else
-#define THREAD_ORDER 0
-#define ASYNC_ORDER 0
-#endif
#else /* __s390x__ */
#ifndef __SMALL_STACK
#define THREAD_ORDER 2
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