Commit 7b751066 authored by Mingming Cao's avatar Mingming Cao Committed by Theodore Ts'o
Browse files

jbd2: add lockdep support 



Ported from similar patch for the jbd layer.

Signed-off-by: default avatarMingming Cao <cmm@us.ibm.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent b939e376

fs/jbd2/transaction.c

+11 −0
Original line number Diff line number Diff line
@@ -241,6 +241,8 @@ static int start_this_handle(journal_t *journal, handle_t *handle) 
	return ret;

}



static struct lock_class_key jbd2_handle_key;



/* Allocate a new handle.  This should probably be in a slab... */

static handle_t *new_handle(int nblocks)

{
@@ -251,6 +253,9 @@ static handle_t *new_handle(int nblocks) 
	handle->h_buffer_credits = nblocks;

	handle->h_ref = 1;



	lockdep_init_map(&handle->h_lockdep_map, "jbd2_handle",

						&jbd2_handle_key, 0);



	return handle;

}
@@ -293,7 +298,11 @@ handle_t *jbd2_journal_start(journal_t *journal, int nblocks) 
		jbd2_free_handle(handle);

		current->journal_info = NULL;

		handle = ERR_PTR(err);

		goto out;

	}



	lock_acquire(&handle->h_lockdep_map, 0, 0, 0, 2, _THIS_IP_);

out:

	return handle;

}
@@ -1419,6 +1428,8 @@ int jbd2_journal_stop(handle_t *handle) 
		spin_unlock(&journal->j_state_lock);

	}



	lock_release(&handle->h_lockdep_map, 1, _THIS_IP_);



	jbd2_free_handle(handle);

	return err;

}

include/linux/jbd2.h

+4 −0
Original line number Diff line number Diff line
@@ -418,6 +418,10 @@ struct handle_s 
	unsigned int	h_sync:		1;	/* sync-on-close */

	unsigned int	h_jdata:	1;	/* force data journaling */

	unsigned int	h_aborted:	1;	/* fatal error on handle */



#ifdef CONFIG_DEBUG_LOCK_ALLOC

	struct lockdep_map	h_lockdep_map;

#endif

};