linux-kernel - [PATCH] usb: host: constify dev_pm

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Date:   Sun, 15 Jan 2017 17:23:25 +0530
From:   Bhumika Goyal <bhumirks@...il.com>
To:     julia.lawall@...6.fr, stern@...land.harvard.edu,
        gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Bhumika Goyal <bhumirks@...il.com>
Subject: [PATCH] usb: host: constify dev_pm_ops structures

Declare dev_pm_ops structures as const as they are only stored in the pm
field of a device_driver structure. This field is of type const, so
dev_pm_ops structures having similar properties can be declared const
too.

Size details after cross compiling the .o file for powerpc
architecture.

File size before:
   text	   data	    bss	    dec	    hex	filename
   3183	    372	      0	   3555	    de3	drivers/usb/host/ehci-fsl.o

File size after:
   text	   data	    bss	    dec	    hex	filename
   3275	    280	      0	   3555	    de3	drivers/usb/host/ehci-fsl.o

Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
---
 drivers/usb/host/ehci-fsl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 91701cc..3733aab 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -600,7 +600,7 @@ static int ehci_fsl_drv_restore(struct device *dev)
 	return 0;
 }
 
-static struct dev_pm_ops ehci_fsl_pm_ops = {
+static const struct dev_pm_ops ehci_fsl_pm_ops = {
 	.suspend = ehci_fsl_drv_suspend,
 	.resume = ehci_fsl_drv_resume,
 	.restore = ehci_fsl_drv_restore,
-- 
1.9.1