On Wed, Jan 30, 2019 at 02:38:07PM +0800, Feng Tang wrote: > Asynchronous driver probing can help much on kernel fastboot, and > this option can provide a flexible way to optimize and quickly verify > async driver probe. > > Also it will help in below cases: > * Some driver actually covers several families of HWs, some of which > could use async probing while others don't. So we can't simply > turn on the PROBE_PREFER_ASYNCHRONOUS flag in driver, but use this > cmdline option, like igb driver async patch discussed at > https://www.spinics.net/lists/netdev/msg545986.html > > * For SOC (System on Chip) with multiple spi or i2c controllers, most > of the slave spi/i2c devices will be assigned with fixed controller > number, while async probing may make those controllers get different > index for each boot, which prevents those controller drivers to be > async probed. For platforms not using these spi/i2c slave devices, > they can use this cmdline option to benefit from the async probing. > > Suggested-by: Alexander Duyck <alexander.h.du...@linux.intel.com> > Signed-off-by: Feng Tang <feng.t...@intel.com> > --- > drivers/base/dd.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+)
This is v3 and yet no change information below the --- line saying what is different from previous versions at all? Not good, please fix. greg k-h
