tools headers uapi: Grab a copy of fadvise.h

Will be used to generate the string table for fadvise64's 'advice'
argument.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-muswpnft8q9krktv052yrgsc@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/include/uapi/linux/fadvise.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef FADVISE_H_INCLUDED
+#define FADVISE_H_INCLUDED
+
+#define POSIX_FADV_NORMAL	0 /* No further special treatment.  */
+#define POSIX_FADV_RANDOM	1 /* Expect random page references.  */
+#define POSIX_FADV_SEQUENTIAL	2 /* Expect sequential page references.  */
+#define POSIX_FADV_WILLNEED	3 /* Will need these pages.  */
+
+/*
+ * The advise values for POSIX_FADV_DONTNEED and POSIX_ADV_NOREUSE
+ * for s390-64 differ from the values for the rest of the world.
+ */
+#if defined(__s390x__)
+#define POSIX_FADV_DONTNEED	6 /* Don't need these pages.  */
+#define POSIX_FADV_NOREUSE	7 /* Data will be accessed once.  */
+#else
+#define POSIX_FADV_DONTNEED	4 /* Don't need these pages.  */
+#define POSIX_FADV_NOREUSE	5 /* Data will be accessed once.  */
+#endif
+
+#endif	/* FADVISE_H_INCLUDED */

tools/perf/check-headers.sh

@@ -4,6 +4,7 @@
 HEADERS='
 include/uapi/drm/drm.h
 include/uapi/drm/i915_drm.h
+include/uapi/linux/fadvise.h
 include/uapi/linux/fcntl.h
 include/uapi/linux/fs.h
 include/uapi/linux/kcmp.h