drbd: Define the size of res_opts->cpu_mask in a single place

Signed-off-by: Andreas Gruenbacher <[e-mail]>
Signed-off-by: Philipp Reisner <[e-mail]>

drivers/block/drbd/drbd_main.c

···
 
 	/* silently ignore cpu mask on UP kernel */
 	if (nr_cpu_ids > 1 && res_opts->cpu_mask[0] != 0) {
-		/* FIXME: Get rid of constant 32 here */
-		err = bitmap_parse(res_opts->cpu_mask, 32,
+		err = bitmap_parse(res_opts->cpu_mask, DRBD_CPU_MASK_SIZE,
 				   cpumask_bits(new_cpu_mask), nr_cpu_ids);
 		if (err) {
 			drbd_warn(resource, "bitmap_parse() failed with %d\n", err);

include/linux/drbd.h

···
 #define DRBD_MD_INDEX_FLEX_EXT -2
 #define DRBD_MD_INDEX_FLEX_INT -3
 
+#define DRBD_CPU_MASK_SIZE 32
+
 #endif

include/linux/drbd_genl.h

···
 )
 
 GENL_struct(DRBD_NLA_RESOURCE_OPTS, 4, res_opts,
-	__str_field_def(1,	DRBD_GENLA_F_MANDATORY,	cpu_mask,       32)
+	__str_field_def(1,	DRBD_GENLA_F_MANDATORY,	cpu_mask,       DRBD_CPU_MASK_SIZE)
 	__u32_field_def(2,	DRBD_GENLA_F_MANDATORY,	on_no_data, DRBD_ON_NO_DATA_DEF)
 )