linux-kernel - [PATCH -mm v2 0/3] Phase 2 of task comm cleanups

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Date:   Sat, 11 Dec 2021 06:39:46 +0000
From:   Yafang Shao <laoar.shao@...il.com>
To:     akpm@...ux-foundation.org, rostedt@...dmis.org,
        keescook@...omium.org, pmladek@...e.com, david@...hat.com,
        arnaldo.melo@...il.com, andrii.nakryiko@...il.com,
        alexei.starovoitov@...il.com
Cc:     linux-mm@...ck.org, bpf@...r.kernel.org,
        linux-perf-users@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yafang Shao <laoar.shao@...il.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Michal Miroslaw <mirq-linux@...e.qmqm.pl>,
        Peter Zijlstra <peterz@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: [PATCH -mm v2 0/3] Phase 2 of task comm cleanups 

This is the followup work of task comm cleanups[1].

In this phase, the hard-coded 16 is replaced by TASK_COMM_LEN_16 to make
it grepable. The difference between this two marcos is: 
- TASK_COMM_LEN
  The size should be same with the TASK_COMM_LEN defined in linux/sched.h.
- TASK_COMM_LEN_16
  The size must be a fixed-size 16 no matter what TASK_COMM_LEN is. It may
  be exposed to userspace so we can't change it. 

1. https://lore.kernel.org/lkml/20211120112738.45980-1-laoar.shao@gmail.com/

Changes since v1:
- use TASK_COMM_LEN_16 instead of TASK_COMM_LEN in patch #3 (Steven)
- avoid changing samples/bpf and bpf/progs (Alexei)

Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: Michal Miroslaw <mirq-linux@...e.qmqm.pl>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: David Hildenbrand <david@...hat.com>
Cc: Al Viro <viro@...iv.linux.org.uk>
Cc: Kees Cook <keescook@...omium.org>
Cc: Petr Mladek <pmladek@...e.com>

Yafang Shao (3):
  elfcore: replace old hard-code 16 with TASK_COMM_LEN_16
  cn_proc: replaced old hard-coded 16 with TASK_COMM_LEN_16
  tools/perf: replace old hard-coded 16 with TASK_COMM_LEN_16

 include/linux/elfcore-compat.h    | 8 ++------
 include/linux/elfcore.h           | 9 ++-------
 include/linux/sched.h             | 5 +++++
 include/uapi/linux/cn_proc.h      | 4 +++-
 tools/perf/tests/evsel-tp-sched.c | 8 +++++---
 5 files changed, 17 insertions(+), 17 deletions(-)

-- 
2.17.1