watchdog: constify watchdog_ops structures

Declare watchdog_ops structures as const as they are only stored in the
ops field of a watchdog_device structure. This field is of type const, so
watchdog_ops structures having this property can be made const too.
Done using Coccinelle:

@r disable optional_qualifier@
identifier x;
position p;
@@
static struct watchdog_ops x@p={...};

@ok@
struct watchdog_device w;
identifier r.x;
position p;
@@
w.ops=&x@p;

@bad@
position p != {r.p,ok.p};
identifier r.x;
@@
x@p

@depends on !bad disable optional_qualifier@
identifier r.x;
@@
+const
struct watchdog_ops x;

File size details before and after patching.
First line of every .o file shows the file size before patching
and second line shows the size after patching.

   text    data     bss     dec     hex filename

   1340	    544	      0	   1884	    75c	drivers/watchdog/bcm_kona_wdt.o
   1436	    440	      0	   1876	    754	drivers/watchdog/bcm_kona_wdt.o

   1176	    544	      4	   1724	    6bc	drivers/watchdog/digicolor_wdt.o
   1272	    440	      4	   1716	    6b4	drivers/watchdog/digicolor_wdt.o

    925	    580	     89	   1594	    63a	drivers/watchdog/ep93xx_wdt.o
   1021	    476	     89	   1586	    632	drivers/watchdog/ep93xx_wdt.o

   4932	    288	     17	   5237	   1475	drivers/watchdog/s3c2410_wdt.o
   5028	    192	     17	   5237	   1475	drivers/watchdog/s3c2410_wdt.o

   1977	    292	      1	   2270	    8de	drivers/watchdog/sama5d4_wdt.o
   2073	    196	      1	   2270	    8de	drivers/watchdog/sama5d4_wdt.o

   1375	    484	      1	   1860	    744	drivers/watchdog/sirfsoc_wdt.o
   1471	    380	      1	   1852	    73c	drivers/watchdog/sirfsoc_wdt.o

Size remains the same for the files drivers/watchdog/diag288_wdt.o
drivers/watchdog/asm9260_wdt.o and drivers/watchdog/atlas7_wdt.o

The following .o files did not compile:
drivers/watchdog/sun4v_wdt.o, drivers/watchdog/sbsa_gwdt.o,
drivers/watchdog/rt2880_wdt.o, drivers/watchdog/booke_wdt.o
drivers/watchdog/mt7621_wdt.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/watchdog/asm9260_wdt.c

@@ -186,7 +186,7 @@ static const struct watchdog_info asm9260_wdt_ident = {
 	.identity         =	"Alphascale asm9260 Watchdog",
 };
 
-static struct watchdog_ops asm9260_wdt_ops = {
+static const struct watchdog_ops asm9260_wdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= asm9260_wdt_enable,
 	.stop		= asm9260_wdt_disable,

drivers/watchdog/atlas7_wdt.c

@@ -105,7 +105,7 @@ static const struct watchdog_info atlas7_wdt_ident = {
 	.identity = "atlas7 Watchdog",
 };
 
-static struct watchdog_ops atlas7_wdt_ops = {
+static const struct watchdog_ops atlas7_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = atlas7_wdt_enable,
 	.stop = atlas7_wdt_disable,

drivers/watchdog/bcm_kona_wdt.c

@@ -266,7 +266,7 @@ static int bcm_kona_wdt_stop(struct watchdog_device *wdog)
 					    SECWDOG_SRSTEN_MASK, 0);
 }
 
-static struct watchdog_ops bcm_kona_wdt_ops = {
+static const struct watchdog_ops bcm_kona_wdt_ops = {
 	.owner =	THIS_MODULE,
 	.start =	bcm_kona_wdt_start,
 	.stop =		bcm_kona_wdt_stop,

drivers/watchdog/booke_wdt.c

@@ -197,7 +197,7 @@ static struct watchdog_info booke_wdt_info __ro_after_init = {
 	.identity = "PowerPC Book-E Watchdog",
 };
 
-static struct watchdog_ops booke_wdt_ops = {
+static const struct watchdog_ops booke_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = booke_wdt_start,
 	.stop = booke_wdt_stop,

drivers/watchdog/diag288_wdt.c

@@ -205,7 +205,7 @@ static int wdt_set_timeout(struct watchdog_device * dev, unsigned int new_to)
 	return wdt_ping(dev);
 }
 
-static struct watchdog_ops wdt_ops = {
+static const struct watchdog_ops wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = wdt_start,
 	.stop = wdt_stop,

drivers/watchdog/digicolor_wdt.c

@@ -96,7 +96,7 @@ static unsigned int dc_wdt_get_timeleft(struct watchdog_device *wdog)
 	return count / clk_get_rate(wdt->clk);
 }
 
-static struct watchdog_ops dc_wdt_ops = {
+static const struct watchdog_ops dc_wdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= dc_wdt_start,
 	.stop		= dc_wdt_stop,

drivers/watchdog/ep93xx_wdt.c

@@ -99,7 +99,7 @@ static const struct watchdog_info ep93xx_wdt_ident = {
 	.identity	= "EP93xx Watchdog",
 };
 
-static struct watchdog_ops ep93xx_wdt_ops = {
+static const struct watchdog_ops ep93xx_wdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= ep93xx_wdt_start,
 	.stop		= ep93xx_wdt_stop,

drivers/watchdog/mt7621_wdt.c

@@ -110,7 +110,7 @@ static struct watchdog_info mt7621_wdt_info = {
 	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 };
 
-static struct watchdog_ops mt7621_wdt_ops = {
+static const struct watchdog_ops mt7621_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = mt7621_wdt_start,
 	.stop = mt7621_wdt_stop,

drivers/watchdog/rt2880_wdt.c

@@ -124,7 +124,7 @@ static struct watchdog_info rt288x_wdt_info = {
 	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 };
 
-static struct watchdog_ops rt288x_wdt_ops = {
+static const struct watchdog_ops rt288x_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = rt288x_wdt_start,
 	.stop = rt288x_wdt_stop,

drivers/watchdog/s3c2410_wdt.c

@@ -394,7 +394,7 @@ static const struct watchdog_info s3c2410_wdt_ident = {
 	.identity         =	"S3C2410 Watchdog",
 };
 
-static struct watchdog_ops s3c2410wdt_ops = {
+static const struct watchdog_ops s3c2410wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = s3c2410wdt_start,
 	.stop = s3c2410wdt_stop,

drivers/watchdog/sama5d4_wdt.c

@@ -107,7 +107,7 @@ static const struct watchdog_info sama5d4_wdt_info = {
 	.identity = "Atmel SAMA5D4 Watchdog",
 };
 
-static struct watchdog_ops sama5d4_wdt_ops = {
+static const struct watchdog_ops sama5d4_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = sama5d4_wdt_start,
 	.stop = sama5d4_wdt_stop,

drivers/watchdog/sbsa_gwdt.c

@@ -215,7 +215,7 @@ static const struct watchdog_info sbsa_gwdt_info = {
 			  WDIOF_CARDRESET,
 };
 
-static struct watchdog_ops sbsa_gwdt_ops = {
+static const struct watchdog_ops sbsa_gwdt_ops = {
 	.owner		= THIS_MODULE,
 	.start		= sbsa_gwdt_start,
 	.stop		= sbsa_gwdt_stop,

drivers/watchdog/sirfsoc_wdt.c

@@ -127,7 +127,7 @@ static const struct watchdog_info sirfsoc_wdt_ident = {
 	.identity         =	"SiRFSOC Watchdog",
 };
 
-static struct watchdog_ops sirfsoc_wdt_ops = {
+static const struct watchdog_ops sirfsoc_wdt_ops = {
 	.owner = THIS_MODULE,
 	.start = sirfsoc_wdt_enable,
 	.stop = sirfsoc_wdt_disable,

drivers/watchdog/sun4v_wdt.c

@@ -77,7 +77,7 @@ static const struct watchdog_info sun4v_wdt_ident = {
 	.firmware_version = 0,
 };
 
-static struct watchdog_ops sun4v_wdt_ops = {
+static const struct watchdog_ops sun4v_wdt_ops = {
 	.owner =	THIS_MODULE,
 	.start =	sun4v_wdt_ping,
 	.stop =		sun4v_wdt_stop,