@@ -1,3 +1,4 @@
 libapi-y += fs.o
 libapi-y += tracing_path.o
 libapi-y += cgroup.o
+libapi-y += fncache.o

@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Manage a cache of file names' existence */
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <linux/list.h>
+#include "fs.h"
+
+struct fncache {
+	struct hlist_node nd;
+	bool res;
+	char name[];
+};
+
+#define FNHSIZE 61
+
+static struct hlist_head fncache_hash[FNHSIZE];
+
+static unsigned shash(const unsigned char *s)
+{
+	unsigned h = 0;
+	while (*s)
+		h = 65599 * h + *s++;
+	return h ^ (h >> 16);
+}
+
+static bool lookup_fncache(const char *name, bool *res)
+{
+	int h = shash((const unsigned char *)name) % FNHSIZE;
+	struct fncache *n;
+
+	hlist_for_each_entry(n, &fncache_hash[h], nd) {
+		if (!strcmp(n->name, name)) {
+			*res = n->res;
+			return true;
+		}
+	}
+	return false;
+}
+
+static void update_fncache(const char *name, bool res)
+{
+	struct fncache *n = malloc(sizeof(struct fncache) + strlen(name) + 1);
+	int h = shash((const unsigned char *)name) % FNHSIZE;
+
+	if (!n)
+		return;
+	strcpy(n->name, name);
+	n->res = res;
+	hlist_add_head(&n->nd, &fncache_hash[h]);
+}
+
+/* No LRU, only use when bounded in some other way. */
+bool file_available(const char *name)
+{
+	bool res;
+
+	if (lookup_fncache(name, &res))
+		return res;
+	res = access(name, R_OK) == 0;
+	update_fncache(name, res);
+	return res;
+}

@@ -59,4 +59,6 @@ int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
 int sysfs__read_bool(const char *entry, bool *value);
 
 int sysfs__write_int(const char *entry, int value);
+
+bool file_available(const char *name);
 #endif /* __API_FS__ */

@@ -13,7 +13,6 @@
 #include "../../../util/intel-pt.h"
 #include "../../../util/intel-bts.h"
 #include "../../../util/pmu.h"
-#include "../../../util/fncache.h"
 
 #define TEMPLATE_ALIAS	"%s/bus/event_source/devices/%s/alias"
 

@@ -9,7 +9,6 @@
 #include "pmu-hybrid.h"
 #include <dirent.h>
 #include <errno.h>
-#include "fncache.h"
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>

@@ -52,7 +52,6 @@ perf-y += header.o
 perf-y += callchain.o
 perf-y += values.o
 perf-y += debug.o
-perf-y += fncache.o
 perf-y += machine.o
 perf-y += map.o
 perf-y += pstack.o

@@ -1,63 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Manage a cache of file names' existence */
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <linux/list.h>
-#include "fncache.h"
-
-struct fncache {
-	struct hlist_node nd;
-	bool res;
-	char name[];
-};
-
-#define FNHSIZE 61
-
-static struct hlist_head fncache_hash[FNHSIZE];
-
-unsigned shash(const unsigned char *s)
-{
-	unsigned h = 0;
-	while (*s)
-		h = 65599 * h + *s++;
-	return h ^ (h >> 16);
-}
-
-static bool lookup_fncache(const char *name, bool *res)
-{
-	int h = shash((const unsigned char *)name) % FNHSIZE;
-	struct fncache *n;
-
-	hlist_for_each_entry(n, &fncache_hash[h], nd) {
-		if (!strcmp(n->name, name)) {
-			*res = n->res;
-			return true;
-		}
-	}
-	return false;
-}
-
-static void update_fncache(const char *name, bool res)
-{
-	struct fncache *n = malloc(sizeof(struct fncache) + strlen(name) + 1);
-	int h = shash((const unsigned char *)name) % FNHSIZE;
-
-	if (!n)
-		return;
-	strcpy(n->name, name);
-	n->res = res;
-	hlist_add_head(&n->nd, &fncache_hash[h]);
-}
-
-/* No LRU, only use when bounded in some other way. */
-bool file_available(const char *name)
-{
-	bool res;
-
-	if (lookup_fncache(name, &res))
-		return res;
-	res = access(name, R_OK) == 0;
-	update_fncache(name, res);
-	return res;
-}

@@ -1,7 +0,0 @@
-#ifndef _FCACHE_H
-#define _FCACHE_H 1
-
-unsigned shash(const unsigned char *s);
-bool file_available(const char *name);
-
-#endif

@@ -13,7 +13,6 @@
 #include <stdarg.h>
 #include <locale.h>
 #include <api/fs/fs.h>
-#include "fncache.h"
 #include "pmu-hybrid.h"
 
 LIST_HEAD(perf_pmu__hybrid_pmus);

@@ -26,7 +26,6 @@
 #include "header.h"
 #include "string2.h"
 #include "strbuf.h"
-#include "fncache.h"
 #include "pmu-hybrid.h"
 
 struct perf_pmu perf_pmu__fake;

@@ -39,4 +39,3 @@ util/affinity.c
 util/rwsem.c
 util/hashmap.c
 util/pmu-hybrid.c
-util/fncache.c

@@ -16,7 +16,7 @@
 #include "srccode.h"
 #include "debug.h"
 #include <internal/lib.h> // page_size
-#include "fncache.h"
+#include <api/fs/fs.h>
 
 #define MAXSRCCACHE (32*1024*1024)
 #define MAXSRCFILES     64

@@ -86,6 +86,14 @@ static void free_srcfile(struct srcfile *sf)
 	num_srcfiles--;
 }
 
+static unsigned shash(const unsigned char *s)
+{
+	unsigned h = 0;
+	while (*s)
+		h = 65599 * h + *s++;
+	return h ^ (h >> 16);
+}
+
 static struct srcfile *find_srcfile(char *fn)
 {
 	struct stat st;