From mboxrd@z Thu Jan  1 00:00:00 1970
From: afd@ti.com (Andrew F. Davis)
Date: Mon, 9 May 2016 13:07:58 -0500
Subject: [Cocci] Ignoring all code in #ifdef blocks
Message-ID: <5730D1FE.5020100@ti.com>
To: cocci@systeme.lip6.fr
List-Id: cocci@systeme.lip6.fr

Hello all,

I am working on a cocci script to remove unneeded code and I have
hopefully a simple question. My script attempts to remove a macro's use,
but only when a relevant struct definition is *not* blocked off by #if
and/or #ifdef CONFIG_OF. I think I would just like to have cocci ignore
all code in-between any blocks but I cannot seem to get it to work. I
have tried --no-includes and --undefined CONFIG_OF, but it still removes
the target macro, even when the struct is in an ifdef block. Example:

static const struct of_device_id gpio_ids[];

static int somefunction()
{
	const struct of_device_id *match;

	match = of_match_device(of_match_ptr(davinci_gpio_ids));
}

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id gpio_ids[] = {
	{ .compatible = "gpio", },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, gpio_ids);
#endif

static struct platform_driver gpio_driver = {
	.probe		= gpio_probe,
	.driver		= {
		.name		= "gpio",
		.of_match_table	= of_match_ptr(gpio_ids),
	},
};

None of the of_match_ptr should be removed in the above file, but if the
#if/endif were remove all should be removed, but I'm not sure how to
match for the ifdef?

Here is my script so far:

@s@
identifier arr;
@@
(
  struct of_device_id arr[] = {
  	...
  };
)

@depends on s@
identifier s.arr;
@@
(
- of_match_ptr(arr)
+ arr
)

Thanks,
Andrew