Symbol: pc_freeclusters
usr/src/uts/common/fs/pcfs/pc_vfsops.c
917
sp->f_bavail = sp->f_bfree = (fsblkcnt64_t)pc_freeclusters(fsp);
usr/src/uts/common/sys/fs/pc_fs.h
580
extern int pc_freeclusters(struct pcfs *); /* num free clusters in fs */