hugetlb: allow bulk updating in hugetlb_*_quota()

Add a second parameter 'delta' to hugetlb_get_quota and hugetlb_put_quota to
allow bulk updating of the sbinfo->free_blocks counter.  This will be used by
the next patch in the series.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: Ken Chen <kenchen@google.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: David Gibson <hermes@gibson.dropbear.id.au>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index bc12b0adfa87..1e317465ecd1 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -132,7 +132,7 @@ static void free_huge_page(struct page *page)
         }
         spin_unlock(&hugetlb_lock);
         if (mapping)
-                hugetlb_put_quota(mapping);
+                hugetlb_put_quota(mapping, 1);
         set_page_private(page, 0);
 }
 
@@ -390,7 +390,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
         struct page *page;
         struct address_space *mapping = vma->vm_file->f_mapping;
 
-        if (hugetlb_get_quota(mapping))
+        if (hugetlb_get_quota(mapping, 1))
                 return ERR_PTR(-VM_FAULT_SIGBUS);
 
         if (vma->vm_flags & VM_MAYSHARE)