staging: lustre: lnet: Constify kernel_param_ops structure

The structure is used as an argument to module_param macro. This
macro calls a bunch of other macros and finally assigns the instance
of the kernel_param_ops structure to the const struct
kernel_param_ops* field of a variable of type kernel_param. Hence,
const can be added to the structure.

Coccinelle Script:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct kernel_param_ops i@p = { ... };

@ok1@
identifier r.i;
expression e;
position p;
@@
e = i@p

@script:python s@
i << r.i;
t;
@@
coccinelle.t = i[10:];

@ok2@
declarer name module_param;
expression e1,e2;
position p;
@@
module_param(e1,s.t@p,e2);

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
@@
e@i@p

@Depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct kernel_param_ops i = { ... };

Signed-off-by: Gargi Sharma <[email protected]>
Reviewed-by: James Simmons <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/staging/lustre/lnet/libcfs/debug.c

@@ -80,7 +80,7 @@ static int libcfs_param_debug_mb_set(const char *val,
  * it needs quite a bunch of extra processing, so we define special
  * debugmb parameter type with corresponding methods to handle this case
  */
-static struct kernel_param_ops param_ops_debugmb = {
+static const struct kernel_param_ops param_ops_debugmb = {
 	.set = libcfs_param_debug_mb_set,
 	.get = param_get_uint,
 };
@@ -138,7 +138,7 @@ static int param_set_console_max_delay(const char *val,
 				      libcfs_console_min_delay, INT_MAX);
 }
 
-static struct kernel_param_ops param_ops_console_max_delay = {
+static const struct kernel_param_ops param_ops_console_max_delay = {
 	.set = param_set_console_max_delay,
 	.get = param_get_delay,
 };
@@ -156,7 +156,7 @@ static int param_set_console_min_delay(const char *val,
 				      1, libcfs_console_max_delay);
 }
 
-static struct kernel_param_ops param_ops_console_min_delay = {
+static const struct kernel_param_ops param_ops_console_min_delay = {
 	.set = param_set_console_min_delay,
 	.get = param_get_delay,
 };
@@ -188,7 +188,7 @@ static int param_set_uintpos(const char *val, const struct kernel_param *kp)
 	return param_set_uint_minmax(val, kp, 1, -1);
 }
 
-static struct kernel_param_ops param_ops_uintpos = {
+static const struct kernel_param_ops param_ops_uintpos = {
 	.set = param_set_uintpos,
 	.get = param_get_uint,
 };