> /* Look up the first VA which satisfies addr < va_end, NULL if none. */ > -static struct vmap_area *find_vmap_area_exceed_addr(unsigned long addr) > +static struct vmap_area *find_vmap_area_exceed_addr(unsigned long addr, struct rb_root *root) Please avoid the overly long line. > + struct cpu_vmap_zone *z = addr_to_cvz(va->va_start); > + > /* > * Remove from the busy tree/list. > */ > - spin_lock(&vmap_area_lock); > - unlink_va(va, &vmap_area_root); > - spin_unlock(&vmap_area_lock); > + fbl_lock(z, BUSY); > + unlink_va(va, &fbl_root(z, BUSY)); > + fbl_unlock(z, BUSY); I find the BUSY magic here very confusing, and would prefer to just spell the actual lock reference out.
