linux-kernel - [PATCH v3 0/2] perf tests: Check for ARM [vectors] page

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Date:   Thu, 20 Dec 2018 19:43:35 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     cphealy@...il.com, Florian Fainelli <f.fainelli@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Kim Phillips <kim.phillips@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        rmk+kernel@...linux.org.uk, l.stach@...gutronix.de
Subject: [PATCH v3 0/2] perf tests: Check for ARM [vectors] page

Hi all,

I just painfully learned that perf would segfault when
CONFIG_KUSER_HELPERS is disabled because it unconditionally makes use of
it. This patch series adds an ARM test for that by leveraging the
existing find_vdso_map() function and making it more generic and capable
of location any map within /proc/self/maps.

Changes in v3:

- remove find_vdso_map() call find_map() with VDSO__MAP_NAME

Changes in v2:

- use strlen() instead of sizeof() -1 since we made the page name a
  parameter
- use TEST_OK/TEST_FAIL in lieu of 0/-1
- added an error message indicating CONFIG_KUSER_HELPERS might be
  disabled

Florian Fainelli (2):
  perf tools: Make find_vdso_map() more modular
  perf tests: Add a test for the ARM 32-bit [vectors] page

 tools/perf/Makefile.perf                      |  4 ++--
 tools/perf/arch/arm/tests/Build               |  1 +
 tools/perf/arch/arm/tests/arch-tests.c        |  4 ++++
 tools/perf/arch/arm/tests/vectors-page.c      | 24 +++++++++++++++++++
 tools/perf/perf-read-vdso.c                   |  6 ++---
 tools/perf/tests/tests.h                      |  5 ++++
 .../perf/util/{find-vdso-map.c => find-map.c} |  7 +++---
 tools/perf/util/vdso.c                        |  6 ++---
 8 files changed, 45 insertions(+), 12 deletions(-)
 create mode 100644 tools/perf/arch/arm/tests/vectors-page.c
 rename tools/perf/util/{find-vdso-map.c => find-map.c} (71%)

-- 
2.17.1