[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, 1 insertions, 1 deletions

diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index ef32577da304..f897ce2ccf0d 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -302,7 +302,7 @@ long execve(const char *filename, char **argv, char **envp)
                 "b      ret_to_user"
                 :
                 : "r" (current_thread_info()),
-                  "Ir" (THREAD_SIZE - 8 - sizeof(regs)),
+                  "Ir" (THREAD_START_SP - sizeof(regs)),
                   "r" (&regs),
                   "Ir" (sizeof(regs))
                 : "r0", "r1", "r2", "r3", "ip", "memory");