From bb3b2cfeb206f5b10b859e134651b54120e3f530 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 30 Jun 2026 18:05:56 +0100 Subject: ARM: 9480/1: entry: expand comment in __switch_to As per discussion between the developers in the mail thread linked, expand the comment in __switch_to so that readers of the code understand what is going on. Suggested-by: Mark Rutland Acked-by: Mark Rutland Signed-off-by: Linus Walleij > Signed-off-by: Russell King --- tools/perf/util/usage.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 tools/perf/util/usage.c (limited to 'tools/perf/util/usage.c') diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c new file mode 100644 index 000000000..4c8ffbad2 --- /dev/null +++ b/tools/perf/util/usage.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * usage.c + * + * Various reporting routines. + * Originally copied from GIT source. + * + * Copyright (C) Linus Torvalds, 2005 + */ +#include "util.h" +#include +#include +#include + +const char perf_usage_string[] = + "perf [--version] [--help] [OPTIONS] COMMAND [ARGS]"; + +const char perf_more_info_string[] = + "See 'perf help COMMAND' for more information on a specific command."; + +static __noreturn void usage_builtin(const char *err) +{ + fprintf(stderr, "\n Usage: %s\n", err); + exit(129); +} + +/* If we are in a dlopen()ed .so write to a global variable would segfault + * (ugh), so keep things static. */ +static void (*usage_routine)(const char *err) __noreturn = usage_builtin; + +void usage(const char *err) +{ + usage_routine(err); +} -- cgit v1.3.1