vgetrandom.c

 1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <asm/facility.h>
 4#include <uapi/asm-generic/errno.h>
 5#include "vdso.h"
 6
 7ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len)
 8{
 9	if (test_facility(129))
10		return __cvdso_getrandom(buffer, len, flags, opaque_state, opaque_len);
11	if (unlikely(opaque_len == ~0UL && !buffer && !len && !flags))
12		return -ENOSYS;
13	return getrandom_syscall(buffer, len, flags);
14}