unmap_region      124 arch/powerpc/platforms/powernv/vas-window.c static void unmap_region(void *addr, u64 start, int len)
unmap_region     2938 drivers/scsi/scsi_debug.c static void unmap_region(sector_t lba, unsigned int len)
unmap_region     2605 mm/mmap.c      static void unmap_region(struct mm_struct *mm,