+ resource-replace-open-coded-resource_overlaps.patch added to mm-nonmm-unstable branch

+ resource-replace-open-coded-resource_overlaps.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: resource: replace open coded resource_overlaps()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     resource-replace-open-coded-resource_overlaps.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/resource-replace-open-coded-resource_overlaps.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: resource: replace open coded resource_overlaps()
Date: Tue, 15 Sep 2026 10:53:53 +0200

In iomem_map_sanity_check() a piece of code resembles the content of the
resource_overlaps().  Replace open coded piece with the call to the
existing helper.

Link: https://lore.kernel.org/20260915085353.3518153-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Bradley Morgan <brads@mainlining.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>
---

 kernel/resource.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

--- a/kernel/resource.c~resource-replace-open-coded-resource_overlaps
+++ a/kernel/resource.c
@@ -1833,7 +1833,7 @@ __setup("reserve=", reserve_setup);
  */
 int iomem_map_sanity_check(resource_size_t addr, unsigned long size)
 {
-	resource_size_t end = addr + size - 1;
+	struct resource mem = DEFINE_RES_MEM(addr, size);
 	struct resource *p;
 	int err = 0;
 
@@ -1843,12 +1843,10 @@ int iomem_map_sanity_check(resource_size
 		 * We can probably skip the resources without
 		 * IORESOURCE_IO attribute?
 		 */
-		if (p->start > end)
+		if (!resource_overlaps(p, &mem))
 			continue;
-		if (p->end < addr)
-			continue;
-		if (PFN_DOWN(p->start) <= PFN_DOWN(addr) &&
-		    PFN_DOWN(p->end) >= PFN_DOWN(end))
+		if (PFN_DOWN(p->start) <= PFN_DOWN(mem.start) &&
+		    PFN_DOWN(p->end) >= PFN_DOWN(mem.end))
 			continue;
 		/*
 		 * if a resource is "BUSY", it's not a hardware resource
@@ -1859,8 +1857,8 @@ int iomem_map_sanity_check(resource_size
 		if (p->flags & IORESOURCE_BUSY)
 			continue;
 
-		pr_debug("resource sanity check: requesting [mem %pa-%pa], which spans more than %s %pR\n",
-			&addr, &end, p->name, p);
+		pr_debug("resource sanity check: requesting %pR, which spans more than %s %pR\n",
+			 &mem, p->name, p);
 		err = -1;
 		break;
 	}
_

Patches currently in -mm which might be from andriy.shevchenko@linux.intel.com are

resource-replace-open-coded-resource_overlaps.patch