fellow_disk_obj: macro for fdsl access

src/fellow_cache.c

@@ -595,6 +595,10 @@ struct fellow_disk_obj {
 	uint8_t			va_data[];
 };
 
+// pointer to the embedded fdsl
+#define fellow_disk_obj_fdsl(fdo)					\
+	(void *)((uint8_t *)fdo + sizeof *fdo + fdo->va_data_len)
+
 // shaved off one pointer...
 #define FCO_FCS(fco)	(&(fco)->fdo_fcs)
 #define FCO_FDO(fco)	fellow_disk_obj(FCO_FCS(fco))
@@ -2221,8 +2225,7 @@ fellow_busy_obj_alloc(struct fellow_cache *fc,
 	fcs->refcnt = 2;
 	fellow_cache_seg_transition_locked_notincore(fcs, FCO_BUSY);
 
-	fdsl = fellow_disk_seglist_init(
-	    (void *)((uint8_t *)fdo + sizeof *fdo + wsl),
+	fdsl = fellow_disk_seglist_init(fellow_disk_obj_fdsl(fdo),
 	    ldsegs, fc->tune->hash_obj);
 	fellow_cache_seglist_associate(&fco->seglist, fdsl, FCS_USABLE);
 //	DBG("fdsl lsegs %u fcsl lsegs %u", fdsl->lsegs, fco->seglist.lsegs);
@@ -5304,7 +5307,7 @@ struct objcore **ocp, uintptr_t priv2, unsigned crit)
 	if (fco->oc)
 		fco->oc->oa_present |= fdoa2oa_present(fdo->fdoa_present);
 
-	fdsl = (void *)((uint8_t *)fdo + sizeof *fdo + fdo->va_data_len);
+	fdsl = fellow_disk_obj_fdsl(fdo);
 	assert(PAOK(fdsl));
 	// XXX load of folow-up seglists could be async
 	// should not be a common case though, we try to make the first