ilo-pona/xv6-65oo2
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Activity

move ialloc body up, avoiding double check for end of loop

Browse source
This commit is contained in:
rsc 2007-08-08 09:53:46 +00:00
parent 32eea7665a
commit 95c07f8267
1 changed files with 7 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
fs.c
View file

@ -201,20 +201,16 @@ ialloc(uint dev, short type)
bp = bread(dev, IBLOCK(inum));
dip = &((struct dinode*)(bp->data))[inum % IPB];
if(dip->type == 0) { // a free inode
break;
memset(dip, 0, sizeof(*dip));
dip->type = type;
bwrite(bp, IBLOCK(inum)); // mark it allocated on the disk
brelse(bp);
ip = iget(dev, inum);
return ip;
}
brelse(bp);
}
if(inum >= ninodes)
panic("ialloc: no inodes left");
memset(dip, 0, sizeof(*dip));
dip->type = type;
bwrite(bp, IBLOCK(inum)); // mark it allocated on the disk
brelse(bp);
ip = iget(dev, inum);
return ip;
panic("ialloc: no inodes");
}
// Free the given inode from its file system.