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Commit acb64a43 authored by David Woodhouse's avatar David Woodhouse
Browse files

jffs2: Require jffs2_garbage_collect_trigger() to be called with lock held 



We're about to call this from a bunch of places which already hold
c->erase_completion_lock, so add an assertion and change its existing
callers to do the same.

Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent d6ce1710

fs/jffs2/background.c

+1 −2
Original line number Diff line number Diff line
@@ -23,10 +23,9 @@ static int jffs2_garbage_collect_thread(void *); 


void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c)

{

	spin_lock(&c->erase_completion_lock);

	assert_spin_locked(&c->erase_completion_lock);

	if (c->gc_task && jffs2_thread_should_wake(c))

		send_sig(SIGHUP, c->gc_task, 1);

	spin_unlock(&c->erase_completion_lock);

}



/* This must only ever be called when no GC thread is currently running */

fs/jffs2/nodemgmt.c

+2 −0
Original line number Diff line number Diff line
@@ -481,7 +481,9 @@ struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, 
void jffs2_complete_reservation(struct jffs2_sb_info *c)

{

	D1(printk(KERN_DEBUG "jffs2_complete_reservation()\n"));

	spin_lock(&c->erase_completion_lock);

	jffs2_garbage_collect_trigger(c);

	spin_unlock(&c->erase_completion_lock);

	mutex_unlock(&c->alloc_sem);

}

fs/jffs2/super.c

+2 −0
Original line number Diff line number Diff line
@@ -63,7 +63,9 @@ static void jffs2_write_super(struct super_block *sb) 


	if (!(sb->s_flags & MS_RDONLY)) {

		D1(printk(KERN_DEBUG "jffs2_write_super()\n"));

		spin_lock(&c->erase_completion_lock);

		jffs2_garbage_collect_trigger(c);

		spin_unlock(&c->erase_completion_lock);

		jffs2_erase_pending_blocks(c, 0);

		jffs2_flush_wbuf_gc(c, 0);

	}