Several reviewers noticed that initialization and destruction of the
mm->context is unnecessary, since the entire MM struct is zeroed on
allocation anyways.

Verified with BUG_ON(mm->context.ldt || mm->context.ldt_pages);

Signed-off-by: Zachary Amsden <zach@vmware.com>
Index: linux-2.6.13/include/asm-i386/mmu_context.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/mmu_context.h	2005-08-15 11:23:32.000000000 -0700
+++ linux-2.6.13/include/asm-i386/mmu_context.h	2005-08-16 11:35:11.000000000 -0700
@@ -16,7 +16,6 @@
 	struct mm_struct * old_mm;
 	int retval = 0;
 
-	memset(&mm->context, 0, sizeof(mm->context));
 	init_MUTEX(&mm->context.sem);
 	old_mm = current->mm;
 	if (old_mm && unlikely(old_mm->context.ldt)) {
Index: linux-2.6.13/arch/i386/kernel/ldt.c
===================================================================
--- linux-2.6.13.orig/arch/i386/kernel/ldt.c	2005-08-15 11:23:32.000000000 -0700
+++ linux-2.6.13/arch/i386/kernel/ldt.c	2005-08-16 11:12:59.000000000 -0700
@@ -105,7 +105,6 @@
 		vfree(mm->context.ldt);
 	else
 		kfree(mm->context.ldt);
-	mm->context.ldt_pages = 0;
 }
 
 static int read_ldt(void __user * ptr, unsigned long bytecount)