xfs: mark __xfs_rtgroup_extents static

__xfs_rtgroup_extents is not used outside of xfs_rtgroup.c, so mark it
static.  Move it and xfs_rtgroup_extents up in the file to avoid forward
declarations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

Author: Christoph Hellwig

fs/xfs/libxfs/xfs_rtgroup.c

@@ -48,6 +48,31 @@ xfs_rtgroup_min_block(
 	return 0;
 }
 
+/* Compute the number of rt extents in this realtime group. */
+static xfs_rtxnum_t
+__xfs_rtgroup_extents(
+	struct xfs_mount	*mp,
+	xfs_rgnumber_t		rgno,
+	xfs_rgnumber_t		rgcount,
+	xfs_rtbxlen_t		rextents)
+{
+	ASSERT(rgno < rgcount);
+	if (rgno == rgcount - 1)
+		return rextents - ((xfs_rtxnum_t)rgno * mp->m_sb.sb_rgextents);
+
+	ASSERT(xfs_has_rtgroups(mp));
+	return mp->m_sb.sb_rgextents;
+}
+
+xfs_rtxnum_t
+xfs_rtgroup_extents(
+	struct xfs_mount	*mp,
+	xfs_rgnumber_t		rgno)
+{
+	return __xfs_rtgroup_extents(mp, rgno, mp->m_sb.sb_rgcount,
+			mp->m_sb.sb_rextents);
+}
+
 /* Precompute this group's geometry */
 void
 xfs_rtgroup_calc_geometry(
@@ -136,31 +161,6 @@ xfs_initialize_rtgroups(
 	return error;
 }
 
-/* Compute the number of rt extents in this realtime group. */
-xfs_rtxnum_t
-__xfs_rtgroup_extents(
-	struct xfs_mount	*mp,
-	xfs_rgnumber_t		rgno,
-	xfs_rgnumber_t		rgcount,
-	xfs_rtbxlen_t		rextents)
-{
-	ASSERT(rgno < rgcount);
-	if (rgno == rgcount - 1)
-		return rextents - ((xfs_rtxnum_t)rgno * mp->m_sb.sb_rgextents);
-
-	ASSERT(xfs_has_rtgroups(mp));
-	return mp->m_sb.sb_rgextents;
-}
-
-xfs_rtxnum_t
-xfs_rtgroup_extents(
-	struct xfs_mount	*mp,
-	xfs_rgnumber_t		rgno)
-{
-	return __xfs_rtgroup_extents(mp, rgno, mp->m_sb.sb_rgcount,
-			mp->m_sb.sb_rextents);
-}
-
 /*
  * Update the rt extent count of the previous tail rtgroup if it changed during
  * recovery (i.e. recovery of a growfs).

fs/xfs/libxfs/xfs_rtgroup.h

@@ -285,8 +285,6 @@ void xfs_free_rtgroups(struct xfs_mount *mp, xfs_rgnumber_t first_rgno,
 int xfs_initialize_rtgroups(struct xfs_mount *mp, xfs_rgnumber_t first_rgno,
 		xfs_rgnumber_t end_rgno, xfs_rtbxlen_t rextents);
 
-xfs_rtxnum_t __xfs_rtgroup_extents(struct xfs_mount *mp, xfs_rgnumber_t rgno,
-		xfs_rgnumber_t rgcount, xfs_rtbxlen_t rextents);
 xfs_rtxnum_t xfs_rtgroup_extents(struct xfs_mount *mp, xfs_rgnumber_t rgno);
 void xfs_rtgroup_calc_geometry(struct xfs_mount *mp, struct xfs_rtgroup *rtg,
 		xfs_rgnumber_t rgno, xfs_rgnumber_t rgcount,