linux-kernel - [PATCH 1/1] dax: add PROBE_PREFER

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Message-ID: <20251002131900.3252980-1-mclapinski@google.com>
Date: Thu,  2 Oct 2025 15:19:00 +0200
From: Michal Clapinski <mclapinski@...gle.com>
To: Dan Williams <dan.j.williams@...el.com>, Vishal Verma <vishal.l.verma@...el.com>, 
	Dave Jiang <dave.jiang@...el.com>, nvdimm@...ts.linux.dev, linux-cxl@...r.kernel.org
Cc: Pasha Tatashin <pasha.tatashin@...een.com>, linux-kernel@...r.kernel.org, 
	Michal Clapinski <mclapinski@...gle.com>
Subject: [PATCH 1/1] dax: add PROBE_PREFER_ASYNCHRONOUS to the pmem driver

Comments in linux/device/driver.h say that the goal is to do async
probing on all devices. The current behavior unnecessarily slows down
the boot by synchronous probing dax_pmem devices, so let's change that.

Signed-off-by: Michal Clapinski <mclapinski@...gle.com>
---
 drivers/dax/pmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dax/pmem.c b/drivers/dax/pmem.c
index bee93066a849..737654e8c5e8 100644
--- a/drivers/dax/pmem.c
+++ b/drivers/dax/pmem.c
@@ -77,6 +77,7 @@ static struct nd_device_driver dax_pmem_driver = {
 	.probe = dax_pmem_probe,
 	.drv = {
 		.name = "dax_pmem",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.type = ND_DRIVER_DAX_PMEM,
 };
-- 
2.51.0.618.g983fd99d29-goog