From: Christoph Hellwig Date: Tue, 8 Jun 2010 16:14:34 +0000 (+0200) Subject: writeback: fix writeback completion notifications X-Git-Tag: v2.6.35-rc4~43^2~16 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f0e7bed936a0c422641a046551829a01341dd80;p=pandora-kernel.git writeback: fix writeback completion notifications The code dealing with bdi_work->state and completion of a bdi_work is a major mess currently. This patch makes sure we directly use one set of flags to deal with it, and use it consistently, which means: - always notify about completion from the rcu callback. We only ever wait for it from on-stack callers, so this simplification does not even cause a theoretical slowdown currently. It also makes sure we don't miss out on the notification if we ever add other callers to wait for it. - make earlier completion notification depending on the on-stack allocation, not the sync mode. If we introduce new callers that want to do WB_SYNC_NONE writeback from on-stack callers this will be nessecary. Also rename bdi_wait_on_work_clear to bdi_wait_on_work_done and inline a few small functions into their only caller to make the code understandable. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- Reading git-diff-tree failed