linux-kernel - [PATCH v2] macintosh: rack-meter: make of_device

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Message-Id: <7ce0e2734a7e95d3341c7424d124ddfd4bc82034.1497850925.git.arvind.yadav.cs@gmail.com>
Date:   Mon, 19 Jun 2017 11:14:25 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     benh@...nel.crashing.org, mingo@...nel.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] macintosh: rack-meter: make of_device_ids const.

of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
    407	    576	      0	    983	    3d7	drivers/macintosh/rack-meter.o

File size after constify rackmeter_match.
   text	   data	    bss	    dec	    hex	filename
    807	    176	      0	    983	    3d7	drivers/macintosh/rack-meter.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
Changes in v1:
              Subject was wrong. It should be constify rackmeter_match.

 drivers/macintosh/rack-meter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/macintosh/rack-meter.c b/drivers/macintosh/rack-meter.c
index e199fd6..35582eb 100644
--- a/drivers/macintosh/rack-meter.c
+++ b/drivers/macintosh/rack-meter.c
@@ -579,7 +579,7 @@ static int rackmeter_shutdown(struct macio_dev* mdev)
 	return 0;
 }

-static struct of_device_id rackmeter_match[] = {
+static const struct of_device_id rackmeter_match[] = {
 	{ .name = "i2s" },
 	{ }
 };
-- 
1.9.1