File lscpu-fix-parameter-order-for-ul_prefix_fopen.patch of Package util-linux.34260

From: "Tom Abraham" <tabraham@suse.com>
Subject: Fix incorrect parameter order for ul_prefix_fopen when reading hypervisor features
Reference: bsc#1215918
Git-mainline: never, upstream rewrote this code in v2.40

For some reason, this code uses ul_prefix_fopen instead of ul_path_fopen and 
has a different parameter order.

Incorrect order of parameters passed to ul_prefix_fopen when reading
/sys/hypervisor/properties/features results in a silent failure and
possible misidentification.

The function as defined in include/path.h is:

FILE *ul_prefix_fopen(const char *prefix, const char *path, const char *mode);

In later changes, this code was moved from lscpu.c to lscpu-virt.c and
commit 8e58a3f11d ("lib/path: remove ul_prefix_fopen") changed this to use 
ul_path_fopen in v2.40-rc1

This is a simpler backport of that fix.

--- a/sys-utils/lscpu.c.orig
+++ b/sys-utils/lscpu.c
@@ -939,7 +939,7 @@ read_hypervisor(struct lscpu_desc *desc,
 		if (desc->hyper == HYPER_XEN) {
 			uint32_t features;
 
-			fd = ul_prefix_fopen(desc->prefix, "r", _PATH_SYS_HYP_FEATURES);
+			fd = ul_prefix_fopen(desc->prefix, _PATH_SYS_HYP_FEATURES, "r");
 
 			if (fd && fscanf(fd, "%x", &features) == 1) {
 				/* Xen PV domain */