mmc: core: make mmc_host_class constant

Since commit 43a7206 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the mmc_host_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.

Cc: Greg Kroah-Hartman <[email protected]>
Suggested-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Ricardo B. Marliere <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

Author: rbmarliere

drivers/mmc/core/host.c

@@ -88,7 +88,7 @@ static int mmc_host_classdev_shutdown(struct device *dev)
 	return 0;
 }
 
-static struct class mmc_host_class = {
+static const struct class mmc_host_class = {
 	.name		= "mmc_host",
 	.dev_release	= mmc_host_classdev_release,
 	.shutdown_pre	= mmc_host_classdev_shutdown,