linux-4.4.1/bitmap_find_next_zero_area_off() の変更点

• 追加された行はこの色です。
• 削除された行はこの色です。
• linux-4.4.1/bitmap_find_next_zero_area_off() へ行く。
• linux-4.4.1/bitmap_find_next_zero_area_off() の差分を削除

*参照元 [#zf94766c]
#backlinks

*説明 [#be1270fa]
-パス: [[linux-4.4.1/lib/bitmap.c]]

-FIXME: これは何？
--説明


**引数 [#xcb8c4fd]
-unsigned long *map
--
-unsigned long size
--
-unsigned long start
--
-unsigned int nr
--
-unsigned long align_mask
--
-unsigned long align_offset
--


**返り値 [#a0d51e9d]
-unsigned long
--


**参考 [#mbba3264]


*実装 [#g9161992]
 /**
  * bitmap_find_next_zero_area_off - find a contiguous aligned zero area
  * @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.
  *
  * 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.
  */
 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)
 {
 	unsigned long index, end, i;
 again:
 	index = find_next_zero_bit(map, size, start);
 
-
--[[linux-4.4.1/find_next_zero_bit()]]

 	/* Align allocation */
 	index = __ALIGN_MASK(index + align_offset, align_mask) - align_offset;
 
-
--[[linux-4.4.1/__ALIGN_MASK()]]

 	end = index + nr;
 	if (end > size)
 		return end;
 	i = find_next_bit(map, end, index);
 	if (i < end) {
 		start = i + 1;
 		goto again;
 	}
-
--[[linux-4.4.1/find_next_bit()]]

 	return index;
 }
 EXPORT_SYMBOL(bitmap_find_next_zero_area_off);
-ライセンスに関係なくシンボルを公開する。
--[[linux-4.4.1/EXPORT_SYMBOL()]]


*コメント [#h6b4b8ab]