[XFS] Dynamically allocate vattr in places it makes sense to do so, to

reduce stack use.  Also re-use vattr in some places so that multiple
copies are not held on-stack.

SGI-PV: 947312
SGI-Modid: xfs-linux-melb:xfs-kern:25369a

Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 269995ddfbdf..ce8fe40e1628 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -420,7 +420,7 @@ linvfs_file_mmap(
 {
         struct inode    *ip = filp->f_dentry->d_inode;
         vnode_t         *vp = LINVFS_GET_VP(ip);
-        vattr_t         va = { .va_mask = XFS_AT_UPDATIME };
+        vattr_t         *vattr;
         int             error;
 
         vma->vm_ops = &linvfs_file_vm_ops;
@@ -431,9 +431,14 @@ linvfs_file_mmap(
         }
 #endif /* CONFIG_XFS_DMAPI */
 
-        VOP_SETATTR(vp, &va, XFS_AT_UPDATIME, NULL, error);
-        if (!error)
-                vn_revalidate(vp);      /* update Linux inode flags */
+        vattr = kmalloc(sizeof(*vattr), GFP_KERNEL);
+        if (unlikely(!vattr))
+                return -ENOMEM;
+        vattr->va_mask = XFS_AT_UPDATIME;
+        VOP_SETATTR(vp, vattr, XFS_AT_UPDATIME, NULL, error);
+        if (likely(!error))
+                __vn_revalidate(vp, vattr);     /* update flags */
+        kfree(vattr);
         return 0;
 }