coredump: pass struct linux_binfmt as const

We don't actually modify it.

Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Christian Brauner <[e-mail]>

fs/coredump.c

···
 
 static bool coredump_write(struct core_name *cn,
 			  struct coredump_params *cprm,
-			  struct linux_binfmt *binfmt)
+			  const struct linux_binfmt *binfmt)
 {
 
 	if (dump_interrupted())
···
 	struct core_state core_state;
 	struct core_name cn;
 	struct mm_struct *mm = current->mm;
-	struct linux_binfmt *binfmt = mm->binfmt;
+	const struct linux_binfmt *binfmt = mm->binfmt;
 	const struct cred *old_cred;
 	int argc = 0;
 	struct coredump_params cprm = {