Imbus/xv6-riscv-kernel
1
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

comment fixes

Browse source
This commit is contained in:
Robert Morris 2017-08-09 06:54:45 -04:00
parent da3b931ddb
commit 70705966ad
2 changed files with 12 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

15
fs.c
View file

@ -155,10 +155,10 @@ bfree(int dev, uint b)
// have locked the inodes involved; this lets callers create
// multi-step atomic operations.
//
// The icache.lock spin-lock defends ip->ref, ip->dev, and ip->inum.
// Since ip->ref indicates whether an icache entry is free, the
// icache.lock defends icache allocation. icache.lock also defends
// all fields of an unallocated icache entry, during allocation.
// The icache.lock spin-lock defends the allocation of icache
// entries. Since ip->ref indicates whether an entry is free,
// and ip->dev and ip->inum indicate which i-node an entry
// holds, one must hold icache.lock while using any of those fields.
//
// An ip->lock sleep-lock defends all ip-> fields other than ref,
// dev, and inum. One must hold ip->lock in order to
@ -189,8 +189,9 @@ iinit(int dev)
static struct inode* iget(uint dev, uint inum);
//PAGEBREAK!
// Allocate a new inode with the given type on device dev.
// A free inode has a type of zero.
// Allocate an inode on device dev.
// Give it type type.
// Returns an unlocked but allocated and referenced inode.
struct inode*
ialloc(uint dev, short type)
{
@ -214,6 +215,8 @@ ialloc(uint dev, short type)
}
// Copy a modified in-memory inode to disk.
// Must be called after every change to an ip->xxx field
// that lives on disk, since i-node cache is write-through.
// Caller must hold ip->lock.
void
iupdate(struct inode *ip)