linux-kernel - [PATCH v1 0/3] No more seq

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Message-Id: <cover.1433193673.git.ydroneaud@opteya.com>
Date:	Mon,  1 Jun 2015 23:32:12 +0200
From:	Yann Droneaud <ydroneaud@...eya.com>
To:	Al Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yann Droneaud <ydroneaud@...eya.com>
Subject: [PATCH v1 0/3] No more seq_file pre-allocation

Hi,

Please find a revised patchset to remove support for
passing pre-allocated struct seq_file to seq_open().

Such feature is undocumented and prone to error.

In particular, if seq_release() is used in release
handler, it will kfree() a pointer which was not
allocated by seq_open().

So, please find a patchset that drop the support for
pre-allocated struct seq_file: it's only of use in
proc_namespace.c and can be easily replaced by using
seq_open_private()/seq_release_private().

Additionally, it documents the use of file->private_data
to hold pointer to struct seq_file by seq_open().

Changes from v0 [0]:
- convert kmalloc() + memset() to kzalloc()
- revised a bit commit messages

[0] [PATCH 0/3] seq_file allocation in seq_open()

http://lkml.kernel.org/r/cover.1430777196.git.ydroneaud@opteya.com
http://lkml.kernel.org/g/cover.1430777196.git.ydroneaud@opteya.com

Yann Droneaud (3):
  fs: use seq_open_private() for proc_mounts
  fs: allocate structure unconditionally in seq_open()
  fs: documents seq_open()'s usage of file->private_data

 fs/mount.h          |  3 ---
 fs/namespace.c      |  6 +++---
 fs/proc_namespace.c | 34 ++++++++++++++++------------------
 fs/seq_file.c       | 19 +++++++++++--------
 4 files changed, 30 insertions(+), 32 deletions(-)

-- 
2.4.2

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