Shift the logic for defining THREAD_SHIFT logic to Kconfig in order to
allow override by users.
Signed-off-by: Hamish Martin <hamish.mar...@alliedtelesis.co.nz>
Reviewed-by: Chris Packham <chris.pack...@alliedtelesis.co.nz>
---
arch/powerpc/Kconfig | 10 ++++++++++
arch/powerpc/include/asm/thread_info.h | 10 +---------
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 281f4f1fcd1f..cd4dd9354b3c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -669,6 +669,16 @@ config PPC_256K_PAGES
endchoice
+config THREAD_SHIFT
+ int "Thread shift" if EXPERT
+ range 13 15
+ default "15" if PPC_256K_PAGES
+ default "14" if PPC64
+ default "13"
+ help
+ Used to define the stack size. The default is almost always what you
+ want. Only change this if you know what you are doing.
+
config FORCE_MAX_ZONEORDER
int "Maximum zone order"
range 8 9 if PPC64 && PPC_64K_PAGES
diff --git a/arch/powerpc/include/asm/thread_info.h
b/arch/powerpc/include/asm/thread_info.h
index 87e4b2d8dcd4..2e17d668c472 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -10,15 +10,7 @@
#ifdef __KERNEL__
-/* We have 8k stacks on ppc32 and 16k on ppc64 */
-
-#if defined(CONFIG_PPC64)
-#define THREAD_SHIFT 14
-#elif defined(CONFIG_PPC_256K_PAGES)
-#define THREAD_SHIFT 15
-#else
-#define THREAD_SHIFT 13
-#endif
+#define THREAD_SHIFT CONFIG_THREAD_SHIFT
#define THREAD_SIZE (1 << THREAD_SHIFT)
--
2.11.0
