Commit a7402c94 authored Feb 06, 2018 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Feb 16, 2018

perf tools: Fix comment for sort__* compare functions



In commit 2f15bd8c ("perf tools: Fix "Command" sort_entry's cmp and
collapse function") we switched from pointer to string comparison.

But failed to remove related comments. Removing them and adding another
one to warn before pointer comparison in here.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180206181813.10943-18-jolsa@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent fdf7c49c

tools/perf/util/sort.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -111,17 +111,20 @@ struct sort_entry sort_thread = {

		/* --sort comm */

		/*
		* We can't use pointer comparison in functions below,
		* because it gives different results based on pointer
		* values, which could break some sorting assumptions.
		*/
		static int64_t
		sort__comm_cmp(struct hist_entry left, struct hist_entry right)
		{
		/* Compare the addr that should be unique among comm */
		return strcmp(comm__str(right->comm), comm__str(left->comm));
		}

		static int64_t
		sort__comm_collapse(struct hist_entry left, struct hist_entry right)
		{
		/* Compare the addr that should be unique among comm */
		return strcmp(comm__str(right->comm), comm__str(left->comm));
		}