FAILED: Patch "mm/highmem: fix __kmap_to_page() build error" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 94350fe6cad77b46c3dcb8c96543bef7647efbc0 Mon Sep 17 00:00:00 2001
From: William Tambe <[email protected]>
Date: Thu, 11 Dec 2025 12:38:19 -0800
Subject: [PATCH] mm/highmem: fix __kmap_to_page() build error

This changes fixes following build error which is a miss from ef6e06b2ef87 ("highmem: fix kmap_to_page() for kmap_local_page() addresses").

mm/highmem.c:184:66: error: 'pteval' undeclared (first use in this function); did you mean 'pte_val'?
184 | idx = arch_kmap_local_map_idx(i, pte_pfn(pteval));

In __kmap_to_page(), pteval is used but does not exist in the function.

(akpm: affects xtensa only)

---
 mm/highmem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

index b5c8e4c2d5d49..a33e411839517 100644
@@ -180,12 +180,13 @@ struct page *__kmap_to_page(void *vaddr)
 		for (i = 0; i < kctrl->idx; i++) {
 			unsigned long base_addr;
 			int idx;
+			pte_t pteval = kctrl->pteval[i];
 
 			idx = arch_kmap_local_map_idx(i, pte_pfn(pteval));
 			base_addr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 
 			if (base_addr == base)
-				return pte_page(kctrl->pteval[i]);
+				return pte_page(pteval);
 		}
 	}
 

2.51.0