arch/arm64/kernel/vdso/vgetrandom.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <uapi/asm-generic/errno.h>
   4
   5 typeof(__cvdso_getrandom) __kernel_getrandom;
   6
   7 ssize_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 }