/*
 * QNX4 file system, Linux implementation.
 *
 * Version : 0.2.1
 *
 * Using parts of the xiafs filesystem.
 *
 * History :
 *
 * 28-05-1998 by Richard Frowijn : first release.
 * 20-06-1998 by Frank Denis : basic optimisations.
 * 25-06-1998 by Frank Denis : qnx4_is_free, qnx4_set_bitmap, qnx4_bmap .
 * 28-06-1998 by Frank Denis : qnx4_free_inode (to be fixed) .
 */

#include <linux/buffer_head.h>
#include <linux/bitops.h>
#include "qnx4.h"

unsigned long qnx4_count_free_blocks(struct super_block *sb)
{
	int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
	int total = 0;
	int total_free = 0;
	int offset = 0;
	int size = le32_to_cpu(qnx4_sb(sb)->BitMap->di_size);
	struct buffer_head *bh;

	while (total < size) {
		int bytes = min(size - total, QNX4_BLOCK_SIZE);

		if ((bh = sb_bread(sb, start + offset)) == NULL) {
			printk(KERN_ERR "qnx4: I/O error in counting free blocks\n");
			break;
		}
		total_free += bytes * BITS_PER_BYTE -
				memweight(bh->b_data, bytes);
		brelse(bh);
		total += bytes;
		offset++;
	}

	return total_free;
}
option value='master'>master</option>
<option value='nds-private-remove' selected='selected'>nds-private-remove</option>
<option value='packet-loop-back'>packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/sound/arm/pxa2xx-ac97.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/arm/pxa2xx-ac97.c'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='01fba20b5976e445676febbdf6dc78d71c6d7b62'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/arm?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>arm</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62'>pxa2xx-ac97.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=01fba20b5976e445676febbdf6dc78d71c6d7b62&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>