github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-04 12:35:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

dax/hmem: Factor HMEM registration into __hmem_register_device()

Browse Source 
Separate the CXL overlap check from the HMEM registration path and keep
the platform-device setup in a dedicated __hmem_register_device().

This makes hmem_register_device() the policy entry point for deciding
whether a range should be deferred to CXL, while __hmem_register_device()
handles the HMEM registration flow.

No functional changes.

Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260322195343.206900-3-Smita.KoralahalliChannabasappa@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Smita Koralahalli 2026-03-22 19:53:35 +00:00 committed by Dave Jiang
parent 14f2e2ebf3
commit 116be1e112
1 changed files with 15 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/dax/hmem/hmem.c
View File

@ -58,21 +58,14 @@ static void release_hmem(void *pdev)
platform_device_unregister(pdev);
}
static int hmem_register_device(struct device *host, int target_nid,
const struct resource *res)
static int __hmem_register_device(struct device *host, int target_nid,
const struct resource *res)
{
struct platform_device *pdev;
struct memregion_info info;
long id;
int rc;
if (IS_ENABLED(CONFIG_CXL_REGION) &&
region_intersects(res->start, resource_size(res), IORESOURCE_MEM,
IORES_DESC_CXL) != REGION_DISJOINT) {
dev_dbg(host, "deferring range to CXL: %pr\n", res);
return 0;
}
rc = region_intersects_soft_reserve(res->start, resource_size(res));
if (rc != REGION_INTERSECTS)
return 0;
@ -123,6 +116,19 @@ static int hmem_register_device(struct device *host, int target_nid,
return rc;
}
static int hmem_register_device(struct device *host, int target_nid,
const struct resource *res)
{
if (IS_ENABLED(CONFIG_CXL_REGION) &&
region_intersects(res->start, resource_size(res), IORESOURCE_MEM,
IORES_DESC_CXL) != REGION_DISJOINT) {
dev_dbg(host, "deferring range to CXL: %pr\n", res);
return 0;
}
return __hmem_register_device(host, target_nid, res);
}
static int dax_hmem_platform_probe(struct platform_device *pdev)
{
return walk_hmem_resources(&pdev->dev, hmem_register_device);