selftests-mm-fix-read_file-return-value-check.patch removed from -mm tree

The quilt patch titled
Subject: selftests/mm: fix read_file() return value check
has been removed from the -mm tree. Its filename was
selftests-mm-fix-read_file-return-value-check.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Hongfu Li <[email protected]>
Subject: selftests/mm: fix read_file() return value check
Date: Fri, 7 Aug 2026 09:35:55 +0800

read_file() returns 0 on open/read failures and never returns negative values. Existing < 0 error checks never trigger, so read failures are silently ignored. Check for zero return to detect read_file() failures.

Also fix misleading error message in get_finfo(). The error string incorrectly references read_num when reading uevent files.

---

 tools/testing/selftests/mm/khugepaged.c |    4 ++--
 tools/testing/selftests/mm/vm_util.c    |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

@@ -141,8 +141,8 @@ static void get_finfo(const char *dir)
 		     major(path_stat.st_dev), minor(path_stat.st_dev))
 	    >= sizeof(path))
 		ksft_exit_fail_msg("%s: Pathname is too long\n", __func__);
-	if (read_file(path, buf, sizeof(buf)) < 0)
-		ksft_exit_fail_perror("read_file(read_num)");
+	if (!read_file(path, buf, sizeof(buf)))
+		ksft_exit_fail_perror("read_file(uevent)");
 	if (strstr(buf, "DEVTYPE=disk")) {
 		/* Found it */
 		if (snprintf(finfo.dev_queue_read_ahead_path,

@@ -942,7 +942,7 @@ unsigned long read_num(const char *path)
 {
 	char buf[21];
 
-	if (read_file(path, buf, sizeof(buf)) < 0)
+	if (!read_file(path, buf, sizeof(buf)))
 		ksft_exit_fail_perror("read_file()");
 
 	return strtoul(buf, NULL, 10);

_

Patches currently in -mm which might be from [email protected] are

mm-use-a-folio-in-the-softleaf_is_device_private-path.patch