orangefs: move orangefs_xattr_handlers to .rodata

This makes it harder for accidental or malicious changes to
orangefs_xattr_handlers at runtime.

Cc: Mike Marshall <[e-mail]>
Cc: Martin Brandenburg <[e-mail]>
Cc: [e-mail]
Signed-off-by: Wedson Almeida Filho <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Christian Brauner <[e-mail]>

fs/orangefs/orangefs-kernel.h

···
 #define ORANGEFS_CACHE_CREATE_FLAGS 0
 #endif
 
-extern const struct xattr_handler *orangefs_xattr_handlers[];
+extern const struct xattr_handler * const orangefs_xattr_handlers[];
 
 extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu);
 extern int orangefs_set_acl(struct mnt_idmap *idmap,

fs/orangefs/xattr.c

···
 	.set = orangefs_xattr_set_default,
 };
 
-const struct xattr_handler *orangefs_xattr_handlers[] = {
+const struct xattr_handler * const orangefs_xattr_handlers[] = {
 	&orangefs_xattr_default_handler,
 	NULL
 };