xfs: fix uninit warning in xfs_growfs_data

Quiet down this gcc warning:

fs/xfs/xfs_fsops.c: In function ‘xfs_growfs_data’:
fs/xfs/xfs_fsops.c:219:21: error: ‘lastag_extended’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
  219 |                 if (lastag_extended) {
      |                     ^~~~~~~~~~~~~~~
fs/xfs/xfs_fsops.c:100:33: note: ‘lastag_extended’ was declared here
  100 |         bool                    lastag_extended;
      |                                 ^~~~~~~~~~~~~~~

By setting its value explicitly.  From code analysis I don't think this
is a real problem, but I have better things to do than analyse this
closely.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 839ca9a..a19ee48 100644 (file)
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -93,7 +93,7 @@ xfs_growfs_data_private(
        xfs_agnumber_t          nagimax = 0;
        xfs_rfsblock_t          nb, nb_div, nb_mod;
        int64_t                 delta;
-       bool                    lastag_extended;
+       bool                    lastag_extended = false;
        xfs_agnumber_t          oagcount;
        struct xfs_trans        *tp;
        struct aghdr_init_data  id = {};