From: Alexander Duyck <alexander.h.duyck@linux.intel.com> mainline inclusion from mainline-v5.1-rc1 commit c37e20eaf4b21125898fd454f3ea6b212865d0a6 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBP35K CVE: CVE-2022-49385 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- Call the asynchronous probe routines on a CPU local to the device node. By doing this we should be able to improve our initialization time significantly as we can avoid having to access the device from a remote node which may introduce higher latency. For example, in the case of initializing memory for NVDIMM this can have a significant impact as initialing 3TB on remote node can take up to 39 seconds while initialing it on a local node only takes 23 seconds. It is situations like this where we will see the biggest improvement. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yin Tirui <yintirui@huawei.com> Reviewed-by: Weilong Chen <chenweilong@huawei.com> --- drivers/base/dd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index b69691f5d217..76a40017bb7f 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -832,7 +832,7 @@ static int __device_attach(struct device *dev, bool allow_async) */ dev_dbg(dev, "scheduling asynchronous probe\n"); get_device(dev); - async_schedule(__device_attach_async_helper, dev); + async_schedule_dev(__device_attach_async_helper, dev); } else { pm_request_idle(dev); } @@ -1001,7 +1001,7 @@ static int __driver_attach(struct device *dev, void *data) if (!dev->driver) { get_device(dev); dev->p->async_driver = drv; - async_schedule(__driver_attach_async_helper, dev); + async_schedule_dev(__driver_attach_async_helper, dev); } device_unlock(dev); return 0; -- 2.22.0