unsigned paravirt_patch_call(void *insnbuf,
			     const void *target, u16 tgt_clobbers,
			     unsigned long addr, u16 site_clobbers,
			     unsigned len)
{
	struct branch *b = insnbuf;
	unsigned long delta = (unsigned long)target - (addr+5);

	if (len < 5) {
#ifdef CONFIG_RETPOLINE
		WARN_ONCE("Failing to patch indirect CALL in %ps\n", (void *)addr);
#endif
		return len;	/* call too long for patch site */
	}

	b->opcode = 0xe8; /* call */
	b->delta = delta;
	BUILD_BUG_ON(sizeof(*b) != 5);

	return 5;
}
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