FAILED: patch "[PATCH] LoongArch: Check return values for set_memory_{rw,rox}" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-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]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 431ce839dad66d0d56fb604785452c6a57409f35
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026032010-gleaming-other-e253@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From 431ce839dad66d0d56fb604785452c6a57409f35 Mon Sep 17 00:00:00 2001
From: Tiezhu Yang <[email protected]>
Date: Mon, 16 Mar 2026 10:36:01 +0800
Subject: [PATCH] LoongArch: Check return values for set_memory_{rw,rox}

set_memory_rw() and set_memory_rox() may fail, so we should check the return values and return immediately in larch_insn_text_copy().

index 25fdb933119d..6c4ce6892276 100644
@@ -258,6 +258,7 @@ static int text_copy_cb(void *data)
 int larch_insn_text_copy(void *dst, void *src, size_t len)
 {
 	int ret = 0;
+	int err = 0;
 	size_t start, end;
 	struct insn_copy copy = {
 		.dst = dst,

@@ -275,9 +276,19 @@ int larch_insn_text_copy(void *dst, void *src, size_t len)
 	start = round_down((size_t)dst, PAGE_SIZE);
 	end   = round_up((size_t)dst + len, PAGE_SIZE);
 
-	set_memory_rw(start, (end - start) / PAGE_SIZE);
+	err = set_memory_rw(start, (end - start) / PAGE_SIZE);
+	if (err) {
+		pr_info("%s: set_memory_rw() failed\n", __func__);
+		return err;
+	}
+
 	ret = stop_machine_cpuslocked(text_copy_cb, &copy, cpu_online_mask);
-	set_memory_rox(start, (end - start) / PAGE_SIZE);
+
+	err = set_memory_rox(start, (end - start) / PAGE_SIZE);
+	if (err) {
+		pr_info("%s: set_memory_rox() failed\n", __func__);
+		return err;
+	}
 
 	return ret;
 }