[PATCH] init: fix msleep() is not accurate

[Yejune Deng]

See Documentation/timers/timers-howto.rst, msleep() is not
for (1ms - 20ms),use usleep_range() instead.

Signed-off-by: Yejune Deng <yejune.d...@gmail.com>
---
 init/do_mounts.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init/do_mounts.c b/init/do_mounts.c
index a78e44e..e007b47 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -606,7 +606,7 @@ void __init prepare_namespace(void)
                        saved_root_name);
                while (driver_probe_done() != 0 ||
                        (ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
-                       msleep(5);
+                       usleep_range(5000, 6000);
                async_synchronize_full();
        }
 
-- 
1.9.1