Remove the context.id from asm-offsets.c when !MMU

There is no MMU context switching on MMU-less systems.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm/kernel/asm-offsets.c

@@ -88,7 +88,7 @@ int main(void)
   DEFINE(S_OLD_R0,		offsetof(struct pt_regs, ARM_ORIG_r0));
   DEFINE(S_FRAME_SIZE,		sizeof(struct pt_regs));
   BLANK();
-#if __LINUX_ARM_ARCH__ >= 6
+#if defined(CONFIG_MMU) && __LINUX_ARM_ARCH__ >= 6
   DEFINE(MM_CONTEXT_ID,		offsetof(struct mm_struct, context.id));
   BLANK();
 #endif

include/asm-arm/mmu_context.h

@@ -19,7 +19,7 @@
 
 void __check_kvm_seq(struct mm_struct *mm);
 
-#if __LINUX_ARM_ARCH__ >= 6
+#if defined(CONFIG_MMU) && __LINUX_ARM_ARCH__ >= 6
 
 /*
  * On ARMv6, we have the following structure in the Context ID:
@@ -58,8 +58,10 @@ static inline void check_context(struct mm_struct *mm)
 
 static inline void check_context(struct mm_struct *mm)
 {
+#ifdef CONFIG_MMU
 	if (unlikely(mm->context.kvm_seq != init_mm.context.kvm_seq))
 		__check_kvm_seq(mm);
+#endif
 }
 
 #define init_new_context(tsk,mm)	0