---
name: "bitmap_find_next_zero_area_off"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/bitmap_find_next_zero_area_off"
---

# bitmap\_find\_next\_zero\_area\_off(9)

find a contiguous aligned zero area

## NAME

bitmap\_find\_next\_zero\_area\_off - find a contiguous aligned zero area

## SYNOPSIS

**unsigned long bitmap\_find\_next\_zero\_area\_off(unsigned long \*** *map***, unsigned long** *size***, unsigned long** *start***, unsigned int** *nr***, unsigned long** *align\_mask***, unsigned long** *align\_offset***);**

## ARGUMENTS

*map*

The address to base the search on

*size*

The bitmap size in bits

*start*

The bitnumber to start searching at

*nr*

The number of zeroed bits we're looking for

*align\_mask*

Alignment mask for zero area

*align\_offset*

Alignment offset for zero area.

## DESCRIPTION

The *align\_mask* should be one less than a power of 2; the effect is that the bit offset of all zero areas this function finds plus *align\_offset* is multiple of that power of 2.

## COPYRIGHT