vfs: remove rcu lock-unlock from mapping_tagged()

PATCH New Konstantin Khlebnikov 1 participant 1 message Apr 2, 2011

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Konstantin Khlebnikov

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2011-04-02 14:09 UTC #0 lore raw

PATCH 1/1 vfs: remove rcu lock-unlock from mapping_tagged()

radix_tree_tagged() does not require any locking.

Signed-off-by Konstantin Khlebnikov <[email protected]>

---
 mm/page-writeback.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

mm/page-writeback.c +1 -5

index 31f6988..919b45e 100644
@@ -1405,10 +1405,6 @@ EXPORT_SYMBOL(test_set_page_writeback);
  */
 int mapping_tagged(struct address_space *mapping, int tag)
 {
-	int ret;
-	rcu_read_lock();
-	ret = radix_tree_tagged(&mapping->page_tree, tag);
-	rcu_read_unlock();
-	return ret;
+	return radix_tree_tagged(&mapping->page_tree, tag);
 }
 EXPORT_SYMBOL(mapping_tagged);