[ARM] 3100/1: simplify a pointer computation

Patch from Nicolas Pitre

Looks clearer this way.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index ba29827..07fb744 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -355,7 +355,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
        struct thread_info *thread = p->thread_info;
        struct pt_regs *childregs;
 
-       childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
+       childregs = (void *)thread + THREAD_START_SP - sizeof(*regs);
        *childregs = *regs;
        childregs->ARM_r0 = 0;
        childregs->ARM_sp = stack_start;