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Date: Tue, 13 Feb 2018 04:04:21 -0800 From: tip-bot for Kan Liang <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: peterz@...radead.org, wangnan0@...wei.com, hpa@...or.com, acme@...hat.com, yao.jin@...ux.intel.com, linux-kernel@...r.kernel.org, namhyung@...nel.org, mingo@...nel.org, tglx@...utronix.de, jolsa@...nel.org, ak@...ux.intel.com, kan.liang@...el.com Subject: [tip:perf/urgent] perf evlist: Remove stale mmap read for backward Commit-ID: d3035da2c854545f915ff5bcb54572860fe18ee7 Gitweb: https://git.kernel.org/tip/d3035da2c854545f915ff5bcb54572860fe18ee7 Author: Kan Liang <kan.liang@...el.com> AuthorDate: Thu, 18 Jan 2018 13:26:16 -0800 Committer: Arnaldo Carvalho de Melo <acme@...hat.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.liang@...el.com> Acked-by: Jiri Olsa <jolsa@...nel.org> Acked-by: Wang Nan <wangnan0@...wei.com> Cc: Andi Kleen <ak@...ux.intel.com> Cc: Jin Yao <yao.jin@...ux.intel.com> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Peter Zijlstra <peterz@...radead.org> Link: http://lkml.kernel.org/r/1516310792-208685-2-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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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