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-rw-r--r--fs/dax.c29
-rw-r--r--include/linux/dax.h1
-rw-r--r--mm/truncate.c9
3 files changed, 3 insertions, 36 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 66d79067eedf..38deebb8c86e 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -461,35 +461,6 @@ int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index)
}
/*
- * Invalidate exceptional DAX entry if easily possible. This handles DAX
- * entries for invalidate_inode_pages() so we evict the entry only if we can
- * do so without blocking.
- */
-int dax_invalidate_mapping_entry(struct address_space *mapping, pgoff_t index)
-{
- int ret = 0;
- void *entry, **slot;
- struct radix_tree_root *page_tree = &mapping->page_tree;
-
- spin_lock_irq(&mapping->tree_lock);
- entry = __radix_tree_lookup(page_tree, index, NULL, &slot);
- if (!entry || !radix_tree_exceptional_entry(entry) ||
- slot_locked(mapping, slot))
- goto out;
- if (radix_tree_tag_get(page_tree, index, PAGECACHE_TAG_DIRTY) ||
- radix_tree_tag_get(page_tree, index, PAGECACHE_TAG_TOWRITE))
- goto out;
- radix_tree_delete(page_tree, index);
- mapping->nrexceptional--;
- ret = 1;
-out:
- spin_unlock_irq(&mapping->tree_lock);
- if (ret)
- dax_wake_mapping_entry_waiter(mapping, index, entry, true);
- return ret;
-}
-
-/*
* Invalidate exceptional DAX entry if it is clean.
*/
int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
diff --git a/include/linux/dax.h b/include/linux/dax.h
index d3158e74a59e..d1236d16ef00 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -63,7 +63,6 @@ ssize_t dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size,
const struct iomap_ops *ops);
int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index);
-int dax_invalidate_mapping_entry(struct address_space *mapping, pgoff_t index);
int dax_invalidate_mapping_entry_sync(struct address_space *mapping,
pgoff_t index);
void dax_wake_mapping_entry_waiter(struct address_space *mapping,
diff --git a/mm/truncate.c b/mm/truncate.c
index 83a059e8cd1d..706cff171a15 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -67,17 +67,14 @@ static void truncate_exceptional_entry(struct address_space *mapping,
/*
* Invalidate exceptional entry if easily possible. This handles exceptional
- * entries for invalidate_inode_pages() so for DAX it evicts only unlocked and
- * clean entries.
+ * entries for invalidate_inode_pages().
*/
static int invalidate_exceptional_entry(struct address_space *mapping,
pgoff_t index, void *entry)
{
- /* Handled by shmem itself */
- if (shmem_mapping(mapping))
+ /* Handled by shmem itself, or for DAX we do nothing. */
+ if (shmem_mapping(mapping) || dax_mapping(mapping))
return 1;
- if (dax_mapping(mapping))
- return dax_invalidate_mapping_entry(mapping, index);
clear_shadow_entry(mapping, index, entry);
return 1;
}