Commit-ID:  d3035da2c854545f915ff5bcb54572860fe18ee7
Gitweb:     https://git.kernel.org/tip/d3035da2c854545f915ff5bcb54572860fe18ee7
Author:     Kan Liang <kan.li...@intel.com>
AuthorDate: Thu, 18 Jan 2018 13:26:16 -0800
Committer:  Arnaldo Carvalho de Melo <a...@redhat.com>
CommitDate: Tue, 6 Feb 2018 10:11:49 -0300

perf evlist: Remove stale mmap read for backward

perf_evlist__mmap_read_catchup() and perf_evlist__mmap_read_backward()
are only for overwrite mode.

But they read the evlist->mmap buffer which is for non-overwrite mode.

It did not bring any serious problem yet, because there is no one use
it.

Remove the unused interfaces.

Signed-off-by: Kan Liang <kan.li...@intel.com>
Acked-by: Jiri Olsa <jo...@kernel.org>
Acked-by: Wang Nan <wangn...@huawei.com>
Cc: Andi Kleen <a...@linux.intel.com>
Cc: Jin Yao <yao....@linux.intel.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Link: 
http://lkml.kernel.org/r/1516310792-208685-2-git-send-email-kan.li...@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/util/evlist.c | 17 -----------------
 tools/perf/util/evlist.h |  4 ----
 2 files changed, 21 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index ac35cd2..e5fc14e 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -715,28 +715,11 @@ union perf_event *perf_evlist__mmap_read_forward(struct 
perf_evlist *evlist, int
        return perf_mmap__read_forward(md);
 }
 
-union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, 
int idx)
-{
-       struct perf_mmap *md = &evlist->mmap[idx];
-
-       /*
-        * No need to check messup for backward ring buffer:
-        * We can always read arbitrary long data from a backward
-        * ring buffer unless we forget to pause it before reading.
-        */
-       return perf_mmap__read_backward(md);
-}
-
 union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx)
 {
        return perf_evlist__mmap_read_forward(evlist, idx);
 }
 
-void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx)
-{
-       perf_mmap__read_catchup(&evlist->mmap[idx]);
-}
-
 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx)
 {
        perf_mmap__consume(&evlist->mmap[idx], false);
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 75f8e0a..336b838 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -133,10 +133,6 @@ union perf_event *perf_evlist__mmap_read(struct 
perf_evlist *evlist, int idx);
 
 union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist,
                                                 int idx);
-union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist,
-                                                 int idx);
-void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx);
-
 void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx);
 
 int perf_evlist__open(struct perf_evlist *evlist);

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