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To:     Joe Perches <joe@perches.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>
Cc:     Kees Cook <keescook@chromium.org>,
        "Gustavo A . R . Silva" <gustavoars@kernel.org>,
        Julia Lawall <julia.lawall@inria.fr>,
        Alex Dewar <alex.dewar90@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
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 <c22b7006813b1776467a72e716a5970e9277b4b7.camel@perches.com>
From:   Denis Efremov <efremov@linux.com>
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Subject: Re: [PATCH V2] sysfs: Add sysfs_emit and sysfs_emit_at to format
 sysfs output
Message-ID: <8b01dc3a-3642-bc12-ae4d-42b90ec208f1@linux.com>
Date:   Sun, 30 Aug 2020 18:25:29 +0300
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On 8/30/20 3:43 AM, Joe Perches wrote:
> $ cat sysfs_emit.cocci
> @@
> identifier d_show =~ "^.*show.*$";


I think this additional pattern will allow to take more functions into the scope. 

@da@
identifier show, store;
expression name, mode;
@@

(
  DEVICE_ATTR(name, mode, show, store)
|
  DEVICE_ATTR_PREALLOC(name, mode, show, store)
|
  DEVICE_ATTR_IGNORE_LOCKDEP(name, mode, show, store)
)

@@
// I think device_show_ulong, device_show_int, device_show_bool
// functions deserve explicit handling because they are somewhat
// reference implementations.
identifier d_show = { da.show, device_show_ulong, device_show_int, device_show_bool };
identifier dev, attr, buf;
@@

* ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
  {
     ...
  }


I tried also to handle DEVICE_ATTR_RW, but I failed to use fresh identifier.
This doesn't work:

@darw@
identifier name;
@@

(
  DEVICE_ATTR_RW(name)
|
  DEVICE_ATTR_RO(name)
|
  DEVICE_ATTR_WO(name)
)

@@
identifier darw.name;
fresh identifier d_show = name ## "_show"; // <== parse error
identifier dev, attr, buf;
@@

* ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
  {
     ...
  }


Regards,
Denis