xfs: Introduce XFS_SB_FEAT_INCOMPAT_NREXT64 and associated per-fs feature bit
XFS_SB_FEAT_INCOMPAT_NREXT64 incompat feature bit will be set on filesystems which support large per-inode extent counters. This commit defines the new incompat feature bit and the corresponding per-fs feature bit (along with inline functions to work on it). Reviewed-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
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