Explicitly state that zcomp compress/decompress must be
called from non-atomic context.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
 drivers/block/zram/zcomp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index a1d627054bb1..d26a58c67e95 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -146,6 +146,7 @@ int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm,
 	};
 	int ret;
 
+	might_sleep();
 	ret = comp->ops->compress(comp->params, &zstrm->ctx, &req);
 	if (!ret)
 		*dst_len = req.dst_len;
@@ -162,6 +163,7 @@ int zcomp_decompress(struct zcomp *comp, struct zcomp_strm *zstrm,
 		.dst_len = PAGE_SIZE,
 	};
 
+	might_sleep();
 	return comp->ops->decompress(comp->params, &zstrm->ctx, &req);
 }
 
-- 
2.48.1.601.g30ceb7b040-goog