From: Jinshan Xiong <jinshan.xi...@intel.com>

Otherwise it will hit the assertion at cl_lock.c:

 cl_lock.c:1967:discard_cb())
  ASSERTION( (!(page->cp_type == CPT_CACHEABLE) ||
  (!PageWriteback(cl_page_vmpage(env, page)))) ) failed:

This is because in osc_lock_flush() we have to make sure the IO
is finished before discarding the pages.

Signed-off-by: Jinshan Xiong <jinshan.xi...@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2779
Reviewed-on: http://review.whamcloud.com/5419
Reviewed-by: Bobi Jam <bobi...@gmail.com>
Reviewed-by: Oleg Drokin <oleg.dro...@intel.com>
Signed-off-by: James Simmons <jsimm...@infradead.org>
---
 drivers/staging/lustre/lustre/osc/osc_cache.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c 
b/drivers/staging/lustre/lustre/osc/osc_cache.c
index 846be76..a341160 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cache.c
+++ b/drivers/staging/lustre/lustre/osc/osc_cache.c
@@ -965,7 +965,7 @@ static int osc_extent_wait(const struct lu_env *env, struct 
osc_extent *ext,
                        "%s: wait ext to %d timedout, recovery in progress?\n",
                        osc_export(obj)->exp_obd->obd_name, state);
 
-               lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
+               lwi = LWI_INTR(NULL, NULL);
                rc = l_wait_event(ext->oe_waitq, extent_wait_cb(ext, state),
                                  &lwi);
        }
-- 
1.7.1

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