linux-kernel - [PATCH v3 03/11] cxl/region: Rename misleading variable name @hpa to @range

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Message-ID: <20250912144514.526441-4-rrichter@amd.com>
Date: Fri, 12 Sep 2025 16:45:05 +0200
From: Robert Richter <rrichter@....com>
To: Alison Schofield <alison.schofield@...el.com>, Vishal Verma
	<vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>, Dan Williams
	<dan.j.williams@...el.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Dave Jiang <dave.jiang@...el.com>, Davidlohr Bueso <dave@...olabs.net>
CC: <linux-cxl@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Gregory Price
	<gourry@...rry.net>, "Fabio M. De Francesco"
	<fabio.m.de.francesco@...ux.intel.com>, Terry Bowman <terry.bowman@....com>,
	Joshua Hahn <joshua.hahnjy@...il.com>, Robert Richter <rrichter@....com>
Subject: [PATCH v3 03/11] cxl/region: Rename misleading variable name @hpa to @range

@hpa is actually a @range, rename variables accordingly.

Signed-off-by: Robert Richter <rrichter@....com>
---
 drivers/cxl/core/region.c | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 777d04870180..13113920aba7 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -3367,9 +3367,9 @@ static int match_decoder_by_range(struct device *dev, const void *data)
 }
 
 static struct cxl_decoder *
-cxl_port_find_switch_decoder(struct cxl_port *port, struct range *hpa)
+cxl_port_find_switch_decoder(struct cxl_port *port, struct range *range)
 {
-	struct device *cxld_dev = device_find_child(&port->dev, hpa,
+	struct device *cxld_dev = device_find_child(&port->dev, range,
 						    match_decoder_by_range);
 
 	return cxld_dev ? to_cxl_decoder(cxld_dev) : NULL;
@@ -3382,14 +3382,14 @@ cxl_find_root_decoder(struct cxl_endpoint_decoder *cxled)
 	struct cxl_port *port = cxled_to_port(cxled);
 	struct cxl_root *cxl_root __free(put_cxl_root) = find_cxl_root(port);
 	struct cxl_decoder *root, *cxld = &cxled->cxld;
-	struct range *hpa = &cxld->hpa_range;
+	struct range *range = &cxld->hpa_range;
 
-	root = cxl_port_find_switch_decoder(&cxl_root->port, hpa);
+	root = cxl_port_find_switch_decoder(&cxl_root->port, range);
 	if (!root) {
 		dev_err(cxlmd->dev.parent,
 			"%s:%s no CXL window for range %#llx:%#llx\n",
 			dev_name(&cxlmd->dev), dev_name(&cxld->dev),
-			cxld->hpa_range.start, cxld->hpa_range.end);
+			range->start, range->end);
 		return NULL;
 	}
 
@@ -3458,7 +3458,7 @@ static int __construct_region(struct cxl_region *cxlr,
 {
 	struct cxl_root_decoder *cxlrd = cxlr->cxlrd;
 	struct cxl_memdev *cxlmd = cxled_to_memdev(cxled);
-	struct range *hpa = &cxled->cxld.hpa_range;
+	struct range *range = &cxled->cxld.hpa_range;
 	struct cxl_region_params *p;
 	struct resource *res;
 	int rc;
@@ -3474,13 +3474,13 @@ static int __construct_region(struct cxl_region *cxlr,
 	}
 
 	set_bit(CXL_REGION_F_AUTO, &cxlr->flags);
-	cxlr->hpa_range = *hpa;
+	cxlr->hpa_range = *range;
 
 	res = kmalloc(sizeof(*res), GFP_KERNEL);
 	if (!res)
 		return -ENOMEM;
 
-	*res = DEFINE_RES_MEM_NAMED(hpa->start, range_len(hpa),
+	*res = DEFINE_RES_MEM_NAMED(range->start, range_len(range),
 				    dev_name(&cxlr->dev));
 
 	rc = cxl_extended_linear_cache_resize(cxlr, res);
@@ -3559,11 +3559,11 @@ static struct cxl_region *construct_region(struct cxl_root_decoder *cxlrd,
 }
 
 static struct cxl_region *
-cxl_find_region_by_range(struct cxl_root_decoder *cxlrd, struct range *hpa)
+cxl_find_region_by_range(struct cxl_root_decoder *cxlrd, struct range *range)
 {
 	struct device *region_dev;
 
-	region_dev = device_find_child(&cxlrd->cxlsd.cxld.dev, hpa,
+	region_dev = device_find_child(&cxlrd->cxlsd.cxld.dev, range,
 				       match_region_by_range);
 	if (!region_dev)
 		return NULL;
@@ -3573,7 +3573,7 @@ cxl_find_region_by_range(struct cxl_root_decoder *cxlrd, struct range *hpa)
 
 int cxl_add_to_region(struct cxl_endpoint_decoder *cxled)
 {
-	struct range *hpa = &cxled->cxld.hpa_range;
+	struct range *range = &cxled->cxld.hpa_range;
 	struct cxl_region_params *p;
 	bool attach = false;
 	int rc;
@@ -3584,12 +3584,13 @@ int cxl_add_to_region(struct cxl_endpoint_decoder *cxled)
 		return -ENXIO;
 
 	/*
-	 * Ensure that if multiple threads race to construct_region() for @hpa
-	 * one does the construction and the others add to that.
+	 * Ensure that if multiple threads race to construct_region()
+	 * for the HPA range one does the construction and the others
+	 * add to that.
 	 */
 	mutex_lock(&cxlrd->range_lock);
 	struct cxl_region *cxlr __free(put_cxl_region) =
-		cxl_find_region_by_range(cxlrd, hpa);
+		cxl_find_region_by_range(cxlrd, range);
 	if (!cxlr)
 		cxlr = construct_region(cxlrd, cxled);
 	mutex_unlock(&cxlrd->range_lock);
-- 
2.39.5