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kill I_LOCK

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After I_SYNC was split from I_LOCK the leftover is always used together with
I_NEW and thus superflous.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig
2009-12-17 14:25:01 +01:00
committed by Al Viro
parent 7a0ad10c36
commit eaff8079d4
9 changed files with 39 additions and 44 deletions
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fs/inode.c
+13 -13
View File
@@ -113,7 +113,7 @@ static void wake_up_inode(struct inode *inode)
* Prevent speculative execution through spin_unlock(&inode_lock);
*/
smp_mb();
wake_up_bit(&inode->i_state, __I_LOCK);
wake_up_bit(&inode->i_state, __I_NEW);
}
/**
@@ -690,17 +690,17 @@ void unlock_new_inode(struct inode *inode)
}
#endif
/*
* This is special! We do not need the spinlock when clearing I_LOCK,
* This is special! We do not need the spinlock when clearing I_NEW,
* because we're guaranteed that nobody else tries to do anything about
* the state of the inode when it is locked, as we just created it (so
* there can be no old holders that haven't tested I_LOCK).
* there can be no old holders that haven't tested I_NEW).
* However we must emit the memory barrier so that other CPUs reliably
* see the clearing of I_LOCK after the other inode initialisation has
* see the clearing of I_NEW after the other inode initialisation has
* completed.
*/
smp_mb();
WARN_ON((inode->i_state & (I_LOCK|I_NEW)) != (I_LOCK|I_NEW));
inode->i_state &= ~(I_LOCK|I_NEW);
WARN_ON(!(inode->i_state & I_NEW));
inode->i_state &= ~I_NEW;
wake_up_inode(inode);
}
EXPORT_SYMBOL(unlock_new_inode);
@@ -731,7 +731,7 @@ static struct inode *get_new_inode(struct super_block *sb,
goto set_failed;
__inode_add_to_lists(sb, head, inode);
inode->i_state = I_LOCK|I_NEW;
inode->i_state = I_NEW;
spin_unlock(&inode_lock);
/* Return the locked inode with I_NEW set, the
@@ -778,7 +778,7 @@ static struct inode *get_new_inode_fast(struct super_block *sb,
if (!old) {
inode->i_ino = ino;
__inode_add_to_lists(sb, head, inode);
inode->i_state = I_LOCK|I_NEW;
inode->i_state = I_NEW;
spin_unlock(&inode_lock);
/* Return the locked inode with I_NEW set, the
@@ -1083,7 +1083,7 @@ int insert_inode_locked(struct inode *inode)
ino_t ino = inode->i_ino;
struct hlist_head *head = inode_hashtable + hash(sb, ino);
inode->i_state |= I_LOCK|I_NEW;
inode->i_state |= I_NEW;
while (1) {
struct hlist_node *node;
struct inode *old = NULL;
@@ -1120,7 +1120,7 @@ int insert_inode_locked4(struct inode *inode, unsigned long hashval,
struct super_block *sb = inode->i_sb;
struct hlist_head *head = inode_hashtable + hash(sb, hashval);
inode->i_state |= I_LOCK|I_NEW;
inode->i_state |= I_NEW;
while (1) {
struct hlist_node *node;
@@ -1510,7 +1510,7 @@ EXPORT_SYMBOL(inode_wait);
* until the deletion _might_ have completed. Callers are responsible
* to recheck inode state.
*
* It doesn't matter if I_LOCK is not set initially, a call to
* It doesn't matter if I_NEW is not set initially, a call to
* wake_up_inode() after removing from the hash list will DTRT.
*
* This is called with inode_lock held.
@@ -1518,8 +1518,8 @@ EXPORT_SYMBOL(inode_wait);
static void __wait_on_freeing_inode(struct inode *inode)
{
wait_queue_head_t *wq;
DEFINE_WAIT_BIT(wait, &inode->i_state, __I_LOCK);
wq = bit_waitqueue(&inode->i_state, __I_LOCK);
DEFINE_WAIT_BIT(wait, &inode->i_state, __I_NEW);
wq = bit_waitqueue(&inode->i_state, __I_NEW);
prepare_to_wait(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
spin_unlock(&inode_lock);
schedule();