[PATCH] ARM: Fix kernel stack offset calculations

Various places in the ARM kernel implicitly assumed that kernel
stacks are always 8K due to hard coded constants.  Replace these
constants with definitions.

Correct the allowable range of kernel stack pointer values within
the allocation.  Arrange for the entire kernel stack to be zeroed,
not just the upper 4K if CONFIG_DEBUG_STACK_USAGE is set.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/asm-arm/thread_info.h b/include/asm-arm/thread_info.h
index a61618fb433..66c585c50cf 100644
--- a/include/asm-arm/thread_info.h
+++ b/include/asm-arm/thread_info.h
@@ -14,6 +14,10 @@
 
 #include <asm/fpstate.h>
 
+#define THREAD_SIZE_ORDER       1
+#define THREAD_SIZE             8192
+#define THREAD_START_SP         (THREAD_SIZE - 8)
+
 #ifndef __ASSEMBLY__
 
 struct task_struct;
@@ -77,8 +81,6 @@ struct thread_info {
 #define init_thread_info        (init_thread_union.thread_info)
 #define init_stack              (init_thread_union.stack)
 
-#define THREAD_SIZE             8192
-
 /*
  * how to get the thread information struct from C
  */