jbd: clean up journal_try_to_free_buffers()

[pandora-kernel.git] / fs / jbd / transaction.c

diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index ed886e6..73242ba 100644 (file)
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -1686,35 +1686,6 @@ out:
        return;
 }
 
-/*
- * journal_try_to_free_buffers() could race with journal_commit_transaction()
- * The latter might still hold the a count on buffers when inspecting
- * them on t_syncdata_list or t_locked_list.
- *
- * journal_try_to_free_buffers() will call this function to
- * wait for the current transaction to finish syncing data buffers, before
- * tryinf to free that buffer.
- *
- * Called with journal->j_state_lock held.
- */
-static void journal_wait_for_transaction_sync_data(journal_t *journal)
-{
-       transaction_t *transaction = NULL;
-       tid_t tid;
-
-       spin_lock(&journal->j_state_lock);
-       transaction = journal->j_committing_transaction;
-
-       if (!transaction) {
-               spin_unlock(&journal->j_state_lock);
-               return;
-       }
-
-       tid = transaction->t_tid;
-       spin_unlock(&journal->j_state_lock);
-       log_wait_commit(journal, tid);
-}
-
 /**
  * int journal_try_to_free_buffers() - try to free page buffers.
  * @journal: journal for operation
@@ -1786,25 +1757,6 @@ int journal_try_to_free_buffers(journal_t *journal,
 
        ret = try_to_free_buffers(page);
 
-       /*
-        * There are a number of places where journal_try_to_free_buffers()
-        * could race with journal_commit_transaction(), the later still
-        * holds the reference to the buffers to free while processing them.
-        * try_to_free_buffers() failed to free those buffers. Some of the
-        * caller of releasepage() request page buffers to be dropped, otherwise
-        * treat the fail-to-free as errors (such as generic_file_direct_IO())
-        *
-        * So, if the caller of try_to_release_page() wants the synchronous
-        * behaviour(i.e make sure buffers are dropped upon return),
-        * let's wait for the current transaction to finish flush of
-        * dirty data buffers, then try to free those buffers again,
-        * with the journal locked.
-        */
-       if (ret == 0 && (gfp_mask & __GFP_WAIT) && (gfp_mask & __GFP_FS)) {
-               journal_wait_for_transaction_sync_data(journal);
-               ret = try_to_free_buffers(page);
-       }
-
 busy:
        return ret;
 }