uml: fold mmu_context_skas into mm_context

This patch folds mmu_context_skas into struct mm_context, changing all users
of these structures as needed.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index 9ce1c49..0297e63 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -65,5 +65,5 @@
 	if (current->mm == NULL)
 		return 0;
 
-	return current->mm->context.skas.id.stack;
+	return current->mm->context.id.stack;
 }