maccess.c 275 B

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. #include <linux/uaccess.h>
  3. #include <linux/kernel.h>
  4. bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
  5. {
  6. /* highest bit set means kernel space */
  7. return (unsigned long)unsafe_src >> (BITS_PER_LONG - 1);
  8. }