From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
---
fs/dax.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index e6b25ef112f2..494e8fb7a98f 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -498,9 +498,9 @@ static void *dax_insert_mapping_entry(struct address_space *mapping,
void *entry, sector_t sector,
unsigned long flags, bool dirty)
{
- struct radix_tree_root *pages = &mapping->pages;
void *new_entry;
pgoff_t index = vmf->pgoff;
+ XA_STATE(xas, &mapping->pages, index);
if (dirty)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
@@ -516,7 +516,7 @@ static void *dax_insert_mapping_entry(struct address_space *mapping,
PAGE_SIZE, 0);
}
- xa_lock_irq(&mapping->pages);
+ xas_lock_irq(&xas);
new_entry = dax_radix_locked_entry(sector, flags);
if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) {
@@ -528,21 +528,15 @@ static void *dax_insert_mapping_entry(struct address_space *mapping,
* existing entry is a PMD, we will just leave the PMD in the
* tree and dirty it if necessary.
*/
- struct radix_tree_node *node;
- void **slot;
- void *ret;
-
- ret = __radix_tree_lookup(pages, index, &node, &slot);
- WARN_ON_ONCE(ret != entry);
- __radix_tree_replace(pages, node, slot,
- new_entry, NULL);
+ void *prev = xas_store(&xas, new_entry);
+ WARN_ON_ONCE(prev != entry);
entry = new_entry;
}
if (dirty)
- radix_tree_tag_set(pages, index, PAGECACHE_TAG_DIRTY);
+ xas_set_tag(&xas, PAGECACHE_TAG_DIRTY);
- xa_unlock_irq(&mapping->pages);
+ xas_unlock_irq(&xas);
return entry;
}
--
2.15.1
--
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