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fs comment nits

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This commit is contained in:
Robert Morris 2017-08-08 13:24:38 -04:00
parent 5cbccef811
commit 9cec455b17
1 changed files with 7 additions and 7 deletions
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14
fs.c
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@ -112,20 +112,20 @@ bfree(int dev, uint b)
// inodes include book-keeping information that is // inodes include book-keeping information that is
// not stored on disk: ip->ref and ip->flags. // not stored on disk: ip->ref and ip->flags.
// //
// An inode and its in-memory represtative go through a // An inode and its in-memory representation go through a
// sequence of states before they can be used by the // sequence of states before they can be used by the
// rest of the file system code. // rest of the file system code.
// //
// * Allocation: an inode is allocated if its type (on disk) // * Allocation: an inode is allocated if its type (on disk)
// is non-zero. ialloc() allocates, iput() frees if // is non-zero. ialloc() allocates, and iput() frees if
// the link count has fallen to zero. // the reference and link counts have fallen to zero.
// //
// * Referencing in cache: an entry in the inode cache // * Referencing in cache: an entry in the inode cache
// is free if ip->ref is zero. Otherwise ip->ref tracks // is free if ip->ref is zero. Otherwise ip->ref tracks
// the number of in-memory pointers to the entry (open // the number of in-memory pointers to the entry (open
// files and current directories). iget() to find or // files and current directories). iget() finds or
// create a cache entry and increment its ref, iput() // creates a cache entry and increments its ref; iput()
// to decrement ref. // decrements ref.
// //
// * Valid: the information (type, size, &c) in an inode // * Valid: the information (type, size, &c) in an inode
// cache entry is only correct when the I_VALID bit // cache entry is only correct when the I_VALID bit
@ -283,7 +283,7 @@ ilock(struct inode *ip)
acquiresleep(&ip->lock); acquiresleep(&ip->lock);
if(!(ip->flags & I_VALID)){ if((ip->flags & I_VALID) == 0){
bp = bread(ip->dev, IBLOCK(ip->inum, sb)); bp = bread(ip->dev, IBLOCK(ip->inum, sb));
dip = (struct dinode*)bp->data + ip->inum%IPB; dip = (struct dinode*)bp->data + ip->inum%IPB;
ip->type = dip->type; ip->type = dip->type;