From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/qnx4/bitmap.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 kernel/fs/qnx4/bitmap.c (limited to 'kernel/fs/qnx4/bitmap.c') diff --git a/kernel/fs/qnx4/bitmap.c b/kernel/fs/qnx4/bitmap.c new file mode 100644 index 000000000..76a7a697b --- /dev/null +++ b/kernel/fs/qnx4/bitmap.c @@ -0,0 +1,44 @@ +/* + * 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 +#include +#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; +} -- cgit 1.2.3-korg