[PATCH] remove vm_area_struct.vm_raend

Remove the unused vm_area_struct.vm_raend.

If someone wants to tune per-VMA readaround then they can alter
vma->vm_file->f_ra.ra_pages.

arch/ia64/kernel/perfmon.c

@@ -783,7 +783,6 @@ pfm_smpl_buffer_alloc(pfm_context_t *ctx, unsigned long *which_pmds, unsigned lo
 	vma->vm_ops	     = &pfm_vm_ops; /* necesarry to get the close() callback */
 	vma->vm_pgoff	     = 0;
 	vma->vm_file	     = NULL;
-	vma->vm_raend	     = 0;
 	vma->vm_private_data = psb;	/* information needed by the pfm_vm_close() function */
 
 	/*

include/linux/mm.h

@@ -70,7 +70,6 @@ struct vm_area_struct {
 	unsigned long vm_pgoff;		/* Offset (within vm_file) in PAGE_SIZE
 					   units, *not* PAGE_CACHE_SIZE */
 	struct file * vm_file;		/* File we map to (can be NULL). */
-	unsigned long vm_raend;		/* XXX: put full readahead info here. */
 	void * vm_private_data;		/* was vm_pte (shared mem) */
 };
 

mm/madvise.c

@@ -32,7 +32,6 @@ static long madvise_behavior(struct vm_area_struct * vma, unsigned long start,
 	}
 
 	spin_lock(&mm->page_table_lock);
-	vma->vm_raend = 0;
 	VM_ClearReadHint(vma);
 
 	switch (behavior) {

mm/mmap.c

@@ -559,7 +559,6 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
 	vma->vm_pgoff = pgoff;
 	vma->vm_file = NULL;
 	vma->vm_private_data = NULL;
-	vma->vm_raend = 0;
 	INIT_LIST_HEAD(&vma->shared);
 
 	if (file) {
@@ -1089,8 +1088,6 @@ int split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
 		new->vm_pgoff += ((addr - vma->vm_start) >> PAGE_SHIFT);
 	}
 
-	new->vm_raend = 0;
-
 	if (new->vm_file)
 		get_file(new->vm_file);
 

mm/mremap.c

@@ -233,7 +233,6 @@ static unsigned long move_vma(struct vm_area_struct * vma,
 			new_vma->vm_start = new_addr;
 			new_vma->vm_end = new_addr+new_len;
 			new_vma->vm_pgoff += (addr - vma->vm_start) >> PAGE_SHIFT;
-			new_vma->vm_raend = 0;
 			if (new_vma->vm_file)
 				get_file(new_vma->vm_file);
 			if (new_vma->vm_ops && new_vma->vm_ops->open)