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From: Markus Elfring <Markus.Elfring@web.de>
To: Julia Lawall <julia.lawall@lip6.fr>
Cc: Yi Wang <wang.yi59@zte.com.cn>,
	Michal Marek <michal.lkml@markovi.net>,
	Nicolas Palix <nicolas.palix@imag.fr>,
	linux-kernel@vger.kernel.org, Wen Yang <wen.yang99@zte.com.cn>,
	cocci@systeme.lip6.fr
Subject: Re: [Cocci] [4/5] Coccinelle: put_device: Extend when constraints for two SmPL ellipses
Date: Mon, 13 May 2019 14:22:44 +0200
Message-ID: <66250f72-c433-28c7-a224-6f248339ec4c@web.de> (raw)
In-Reply-To: <alpine.DEB.2.20.1905131130530.3616@hadrien>

>> Take additional casts for these code exclusion specifications into account
>> together with optional parentheses.
>
> NACK.

I find this rejection surprising.


> You don't need so many type metavariables.

I got an other software development opinion for this aspect.

Yesterday we started to clarify consequences from the isomorphism specification
“drop_cast” (for SmPL code).
https://github.com/coccinelle/coccinelle/blob/32d3b89ad909316464344a5f61a8092d8d702321/standard.iso#L52

Information like the following influenced my design decision to add three
metavariables here.

elfring@Sonne:~/Projekte/Linux/next-patched> spatch --parse-cocci scripts/coccinelle/free/put_device.cocci
…
warning: iso drop_cast does not match the code below on line -1
T (T )id

pure metavariable T is matched against the following nonpure code:
T
…


> Type metavariables in the same ... can be the same.

I would find it also occasionally nice when multiple SmPL ellipses
can refer to identical type casts.

* The under-documented “type purity” hinders this at the moment.

* But I got the impression that it can be safer to distinguish these
  code variants better.

Regards,
Markus
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  reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-23  6:14 [Cocci] [PATCH] coccinelle: put_device: reduce false positives Wen Yang
2019-03-23 13:41 ` Julia Lawall
2019-03-23 19:44 ` Markus Elfring
2019-03-23 20:06   ` Julia Lawall
2019-03-26  8:45     ` Dan Carpenter
2019-03-26  9:38       ` Julia Lawall
2019-03-26 10:11         ` Dan Carpenter
2019-03-26 10:15           ` Julia Lawall
2019-03-28 13:08             ` Masahiro Yamada
2019-03-28 14:19               ` Julia Lawall
2019-04-01  6:44               ` [Cocci] Coccinelle: " Markus Elfring
2019-04-01 20:04                 ` Julia Lawall
2019-05-13  8:55 ` [Cocci] [PATCH 0/5] Coccinelle: put_device: Adjustments for a SmPL script Markus Elfring
2019-05-13  8:59   ` [Cocci] [PATCH 1/5] Coccinelle: put_device: Adjust a message construction Markus Elfring
2019-05-13  9:35     ` Julia Lawall
2019-05-13 11:33       ` [Cocci] [1/5] " Markus Elfring
2019-05-13 11:36         ` Julia Lawall
2019-05-13 12:48           ` Markus Elfring
2019-07-06 13:13     ` [Cocci] [PATCH 1/5] " Masahiro Yamada
2019-05-13  9:01   ` [Cocci] [PATCH 2/5] Coccinelle: put_device: Add a cast to an expression for an assignment Markus Elfring
2019-05-13  9:33     ` Julia Lawall
2019-07-06 13:13     ` Masahiro Yamada
2019-05-13  9:05   ` [Cocci] [PATCH 3/5] Coccinelle: put_device: Merge four SmPL when constraints into one Markus Elfring
2019-05-13  9:32     ` Julia Lawall
2019-05-13 11:48       ` [Cocci] [3/5] " Markus Elfring
2019-05-13 11:48       ` Markus Elfring
2019-05-13 11:51         ` Julia Lawall
2019-05-13 12:52           ` Markus Elfring
2019-05-13  9:07   ` [Cocci] [PATCH 4/5] Coccinelle: put_device: Extend when constraints for two SmPL ellipses Markus Elfring
2019-05-13  9:31     ` Julia Lawall
2019-05-13 12:22       ` Markus Elfring [this message]
2019-05-14  5:55       ` [Cocci] [4/5] " Markus Elfring
2019-05-14  6:52         ` Julia Lawall
2019-05-14  7:49           ` Markus Elfring
2019-05-14  9:18             ` [Cocci] [4/5] Coccinelle: put_device: Extend when constraints for twoSmPL ellipses wen.yang99
2019-05-14  9:51               ` Markus Elfring
2019-05-14  7:49           ` [Cocci] [4/5] Coccinelle: put_device: Extend when constraints for two SmPL ellipses Markus Elfring
2019-05-13  9:07   ` [Cocci] [PATCH 4/5] " Markus Elfring
2019-05-13  9:10   ` [Cocci] [PATCH 5/5] Coccinelle: put_device: Merge two SmPL when constraints into one Markus Elfring
2019-05-13  9:30     ` Julia Lawall
2019-05-13 12:35       ` [Cocci] [5/5] " Markus Elfring

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