Commit 68f40969 authored May 01, 2014 by Steven Rostedt (Red Hat) Committed by Steven Rostedt May 14, 2014

ftrace: Always inline ftrace_hash_empty() helper function



The ftrace_hash_empty() function is a simple test:

	return !hash || !hash->count;

But gcc seems to want to make it a call. As this is in an extreme
hot path of the function tracer, there's no reason it needs to be
a call. I only wrote it to be a helper function anyway, otherwise
it would have been inlined manually.

Force gcc to inline it, as it could have also been a macro.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

parent 19eab4a4

kernel/trace/ftrace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1105,7 +1105,7 @@ struct ftrace_page {
		static struct ftrace_page *ftrace_pages_start;
		static struct ftrace_page *ftrace_pages;

		static bool ftrace_hash_empty(struct ftrace_hash *hash)
		static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
		{
		return !hash \|\| !hash->count;
		}

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