#include "ext4_config.h"#include "ext4_types.h"#include "ext4_misc.h"#include "ext4_debug.h"#include "ext4_bitmap.h" void ext4_bmap_bits_free(u8int *bmap, u32int sbit, u32int bcnt){	u32int i = sbit; 	while(i & 7){		if(bcnt-- == 0)			return;		ext4_bmap_bit_clr(bmap, i++);	}	sbit = i;	bmap += sbit >> 3; 	memset(bmap, 0, bcnt >> 3);	bmap += bcnt >> 3;	bcnt &= 7; 	while(bcnt > 0)		ext4_bmap_bit_clr(bmap, --bcnt);} int ext4_bmap_bit_find_clr(u8int *bmap, u32int sbit, u32int ebit,			   u32int *bit_id, bool *no_space){	u32int i;	u32int bcnt = ebit - sbit; 	i = sbit;	*no_space = false; 	while (i & 7) { 		if(!bcnt){Nospace:			*no_space = true;			return -1;		} 		if (ext4_bmap_is_bit_clr(bmap, i)) {			*bit_id = i;			return 0;		} 		i++;		bcnt--;	} 	sbit = i;	bmap += (sbit >> 3); 	while (bcnt >= 8) {		if (*bmap != 0xFF) {			for (i = 0; i < 8; ++i) {				if (ext4_bmap_is_bit_clr(bmap, i)) {					*bit_id = sbit + i;					return 0;				}			}		} 		bmap += 1;		bcnt -= 8;		sbit += 8;	} 	for (i = 0; i < bcnt; ++i) {		if (ext4_bmap_is_bit_clr(bmap, i)) {			*bit_id = sbit + i;			return 0;		}	} 	goto Nospace;}