[144/264] /proc/self/numa_maps: restore "huge" tag for hugetlb vmas

3.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andrew Morton <akpm@linux-foundation.org>

commit fc360bd9cdcf875639a77f07fafec26699c546f3 upstream.

The display of the "huge" tag was accidentally removed in 29ea2f698 ("mm:
use walk_page_range() instead of custom page table walking code").

Reported-by: Stephen Hemminger <redacted>
Tested-by: Stephen Hemminger <redacted>
Reviewed-by: Stephen Wilson <redacted>
Cc: KOSAKI Motohiro <redacted>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Lee Schermerhorn <redacted>
Cc: Alexey Dobriyan <redacted>
Cc: Christoph Lameter <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 fs/proc/task_mmu.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c

@@ -1039,6 +1039,9 @@ static int show_numa_map(struct seq_file
 		seq_printf(m, " stack");
 	}
 
+	if (is_vm_hugetlb_page(vma))
+		seq_printf(m, " huge");
+
 	walk_page_range(vma->vm_start, vma->vm_end, &walk);
 
 	if (!md->pages)