xfs: replace on-stack xfs_trans_res with pointer in xfs_create()

There's no need to store a full struct xfs_trans_res on the stack in
xfs_create() and copy the fields. Use a pointer to the appropriate
structures embedded in the xfs_mount.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 8ed049d..2ffb802 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1082,7 +1082,7 @@ xfs_create(
        struct xfs_dquot        *udqp = NULL;
        struct xfs_dquot        *gdqp = NULL;
        struct xfs_dquot        *pdqp = NULL;
-       struct xfs_trans_res    tres;
+       struct xfs_trans_res    *tres;
        uint                    resblks;
 
        trace_xfs_create(dp, name);
@@ -1105,13 +1105,11 @@ xfs_create(
        if (is_dir) {
                rdev = 0;
                resblks = XFS_MKDIR_SPACE_RES(mp, name->len);
-               tres.tr_logres = M_RES(mp)->tr_mkdir.tr_logres;
-               tres.tr_logcount = XFS_MKDIR_LOG_COUNT;
+               tres = &M_RES(mp)->tr_mkdir;
                tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR);
        } else {
                resblks = XFS_CREATE_SPACE_RES(mp, name->len);
-               tres.tr_logres = M_RES(mp)->tr_create.tr_logres;
-               tres.tr_logcount = XFS_CREATE_LOG_COUNT;
+               tres = &M_RES(mp)->tr_create;
                tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE);
        }
 
@@ -1123,17 +1121,16 @@ xfs_create(
         * the case we'll drop the one we have and get a more
         * appropriate transaction later.
         */
-       tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
-       error = xfs_trans_reserve(tp, &tres, resblks, 0);
+       error = xfs_trans_reserve(tp, tres, resblks, 0);
        if (error == -ENOSPC) {
                /* flush outstanding delalloc blocks and retry */
                xfs_flush_inodes(mp);
-               error = xfs_trans_reserve(tp, &tres, resblks, 0);
+               error = xfs_trans_reserve(tp, tres, resblks, 0);
        }
        if (error == -ENOSPC) {
                /* No space at all so try a "no-allocation" reservation */
                resblks = 0;
-               error = xfs_trans_reserve(tp, &tres, 0, 0);
+               error = xfs_trans_reserve(tp, tres, 0, 0);
        }
        if (error) {
                cancel_flags = 0;