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dax: move put_(un)locked_mapping_entry() in dax.c

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No functional change.

The static functions put_locked_mapping_entry() and
put_unlocked_mapping_entry() will soon be used in error cases in
grab_mapping_entry(), so move their definitions above this function.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Ross Zwisler 2016-11-08 11:33:44 +11:00 committed by Dave Chinner
parent fa28f7296a
commit 422476c464
1 changed files with 25 additions and 25 deletions
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50
fs/dax.c
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@ -382,6 +382,31 @@ static void *get_unlocked_mapping_entry(struct address_space *mapping,
}
}
static void put_locked_mapping_entry(struct address_space *mapping,
pgoff_t index, void *entry)
{
if (!radix_tree_exceptional_entry(entry)) {
unlock_page(entry);
put_page(entry);
} else {
dax_unlock_mapping_entry(mapping, index);
}
}
/*
* Called when we are done with radix tree entry we looked up via
* get_unlocked_mapping_entry() and which we didn't lock in the end.
*/
static void put_unlocked_mapping_entry(struct address_space *mapping,
pgoff_t index, void *entry)
{
if (!radix_tree_exceptional_entry(entry))
return;
/* We have to wake up next waiter for the radix tree entry lock */
dax_wake_mapping_entry_waiter(mapping, index, entry, false);
}
/*
* Find radix tree entry at given index. If it points to a page, return with
* the page locked. If it points to the exceptional entry, return with the
@ -486,31 +511,6 @@ void dax_unlock_mapping_entry(struct address_space *mapping, pgoff_t index)
dax_wake_mapping_entry_waiter(mapping, index, entry, false);
}
static void put_locked_mapping_entry(struct address_space *mapping,
pgoff_t index, void *entry)
{
if (!radix_tree_exceptional_entry(entry)) {
unlock_page(entry);
put_page(entry);
} else {
dax_unlock_mapping_entry(mapping, index);
}
}
/*
* Called when we are done with radix tree entry we looked up via
* get_unlocked_mapping_entry() and which we didn't lock in the end.
*/
static void put_unlocked_mapping_entry(struct address_space *mapping,
pgoff_t index, void *entry)
{
if (!radix_tree_exceptional_entry(entry))
return;
/* We have to wake up next waiter for the radix tree entry lock */
dax_wake_mapping_entry_waiter(mapping, index, entry, false);
}
/*
* Delete exceptional DAX entry at @index from @mapping. Wait for radix tree
* entry to get unlocked before deleting it.