linux-kernel - [PATCH RESEND 1/3] perf sort: Drop ip_[lr] arguments from _sort__sym

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Message-Id: <1360130237-9963-1-git-send-email-namhyung@kernel.org>
Date:	Wed,  6 Feb 2013 14:57:15 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH RESEND 1/3] perf sort: Drop ip_[lr] arguments from _sort__sym_cmp()

From: Namhyung Kim <namhyung.kim@....com>

Current _sort__sym_cmp() function is used for comparing symbols
between two hist entries on symbol, symbol_from and symbol_to sort
keys.  Those functions pass addresses of symbols but it's meaningless
since it gets over-written inside of the _sort__sym_cmp function to a
start address of the symbol.  So just get rid of them.

This might cause a difference than prior output for branch stacks
since it seems not using start address of the symbol but branch
address.  However AFAICS it'd be same as it gets overwritten anyway.

Also remove redundant part of code in sort__sym_cmp().

Acked-by: Jiri Olsa <jolsa@...hat.com>
Cc: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/sort.c | 23 ++++++-----------------
 1 file changed, 6 insertions(+), 17 deletions(-)

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 83336610faa9..03cabe5678d0 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -160,9 +160,10 @@ struct sort_entry sort_dso = {
 
 /* --sort symbol */
 
-static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r,
-			      u64 ip_l, u64 ip_r)
+static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r)
 {
+	u64 ip_l, ip_r;
+
 	if (!sym_l || !sym_r)
 		return cmp_null(sym_l, sym_r);
 
@@ -178,21 +179,10 @@ static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r,
 static int64_t
 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 {
-	u64 ip_l, ip_r;
-
 	if (!left->ms.sym && !right->ms.sym)
 		return right->level - left->level;
 
-	if (!left->ms.sym || !right->ms.sym)
-		return cmp_null(left->ms.sym, right->ms.sym);
-
-	if (left->ms.sym == right->ms.sym)
-		return 0;
-
-	ip_l = left->ms.sym->start;
-	ip_r = right->ms.sym->start;
-
-	return _sort__sym_cmp(left->ms.sym, right->ms.sym, ip_l, ip_r);
+	return _sort__sym_cmp(left->ms.sym, right->ms.sym);
 }
 
 static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
@@ -383,8 +373,7 @@ sort__sym_from_cmp(struct hist_entry *left, struct hist_entry *right)
 	if (!from_l->sym && !from_r->sym)
 		return right->level - left->level;
 
-	return _sort__sym_cmp(from_l->sym, from_r->sym, from_l->addr,
-			     from_r->addr);
+	return _sort__sym_cmp(from_l->sym, from_r->sym);
 }
 
 static int64_t
@@ -396,7 +385,7 @@ sort__sym_to_cmp(struct hist_entry *left, struct hist_entry *right)
 	if (!to_l->sym && !to_r->sym)
 		return right->level - left->level;
 
-	return _sort__sym_cmp(to_l->sym, to_r->sym, to_l->addr, to_r->addr);
+	return _sort__sym_cmp(to_l->sym, to_r->sym);
 }
 
 static int hist_entry__sym_from_snprintf(struct hist_entry *self, char *bf,
-- 
1.7.11.7

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