diff mbox series

[RESEND,1/2] ARC: fix incorrect THREAD_SHIFT definition

Message ID 20230525160813.39408-2-minhuadotchen@gmail.com
State New
Headers show
Series ARC: fix THREAD_SHIFT and rename 16KSTACKS | expand

Commit Message

Min-Hua Chen May 25, 2023, 4:08 p.m. UTC 
Current definition of THREAD_SHIFT is (PAGE_SHIFT << THREAD_SIZE_ORDER)
It should be (PAGE_SHIFT + THREAD_SIZE_ORDER) because the following
equation should hold:

Say PAGE_SHIFT == 13 (as the default value in ARC)
THREAD_SIZE_ORDER == 1 (as CONFIG_16KSTACKS=y)

THREAD_SIZE == (1 << THREAD_SHIFT)
            == (1 << (PAGE_SHIFT + THREAD_SIZE_ORDER))
	    == (1 << 14)
	    == 16KB

Signed-off-by: Min-Hua Chen <minhuadotchen@gmail.com>
---
 arch/arc/include/asm/thread_info.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h
index 6ba7fe417095..9f9dd021501c 100644
--- a/arch/arc/include/asm/thread_info.h
+++ b/arch/arc/include/asm/thread_info.h
@@ -22,7 +22,7 @@ 
 #endif
 
 #define THREAD_SIZE     (PAGE_SIZE << THREAD_SIZE_ORDER)
-#define THREAD_SHIFT	(PAGE_SHIFT << THREAD_SIZE_ORDER)
+#define THREAD_SHIFT	(PAGE_SHIFT + THREAD_SIZE_ORDER)
 
 #ifndef __ASSEMBLY__