vgetrandom.c

 1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <uapi/asm-generic/errno.h>
 4
 5typeof(__cvdso_getrandom) __kernel_getrandom;
 6
 7ssize_t __kernel_getrandom(void *buffer, size_t len, unsigned int flags, void *opaque_state, size_t opaque_len)
 8{
 9	if (alternative_has_cap_likely(ARM64_HAS_FPSIMD))
10		return __cvdso_getrandom(buffer, len, flags, opaque_state, opaque_len);
11
12	if (unlikely(opaque_len == ~0UL && !buffer && !len && !flags))
13		return -ENOSYS;
14	return getrandom_syscall(buffer, len, flags);
15}