Re: [PATCH v2 15/20] dax/hmem: Move HMAT and Soft reservation probe initcall level

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On 2/10/23 2:06 AM, Dan Williams wrote:
In preparation for moving more filtering of "hmem" ranges into the
dax_hmem.ko module, update the initcall levels. HMAT range registration
moves to subsys_initcall() to be done before Soft Reservation probing,
and Soft Reservation probing is moved to device_initcall() to be done
before dax_hmem.ko initialization if it is built-in.

Tested-by: Fan Ni <fan.ni@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/167564542109.847146.10113972881782419363.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>

Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>

---
  drivers/acpi/numa/hmat.c  |    2 +-
  drivers/dax/hmem/Makefile |    3 ++-
  drivers/dax/hmem/device.c |    2 +-
  3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 605a0c7053be..ff24282301ab 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -869,4 +869,4 @@ static __init int hmat_init(void)
  	acpi_put_table(tbl);
  	return 0;
  }
-device_initcall(hmat_init);
+subsys_initcall(hmat_init);
diff --git a/drivers/dax/hmem/Makefile b/drivers/dax/hmem/Makefile
index 57377b4c3d47..d4c4cd6bccd7 100644
--- a/drivers/dax/hmem/Makefile
+++ b/drivers/dax/hmem/Makefile
@@ -1,6 +1,7 @@
  # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_DEV_DAX_HMEM) += dax_hmem.o
+# device_hmem.o deliberately precedes dax_hmem.o for initcall ordering
  obj-$(CONFIG_DEV_DAX_HMEM_DEVICES) += device_hmem.o
+obj-$(CONFIG_DEV_DAX_HMEM) += dax_hmem.o
device_hmem-y := device.o
  dax_hmem-y := hmem.o
diff --git a/drivers/dax/hmem/device.c b/drivers/dax/hmem/device.c
index 903325aac991..20749c7fab81 100644
--- a/drivers/dax/hmem/device.c
+++ b/drivers/dax/hmem/device.c
@@ -104,4 +104,4 @@ static __init int hmem_init(void)
   * As this is a fallback for address ranges unclaimed by the ACPI HMAT
   * parsing it must be at an initcall level greater than hmat_init().
   */
-late_initcall(hmem_init);
+device_initcall(hmem_init);





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