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Subject[PATCH 06/10] perf sort: Drop ip_[lr] arguments from _sort__sym_cmp()
Date
From: Namhyung Kim <namhyung.kim@lge.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().

Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.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 a36051b34901..c02964cabdd0 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,
@@ -380,8 +370,7 @@ 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
@@ -393,7 +382,7 @@ 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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