text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef __ASM_SH_STACKPROTECTOR_H
  #define __ASM_SH_STACKPROTECTOR_H
  
  #include <linux/random.h>
  #include <linux/version.h>
  
  extern unsigned long __stack_chk_guard;
  
  /*
   * Initialize the stackprotector canary value.
   *
   * NOTE: this must only be called from functions that never return,
   * and it must always be inlined.
   */
  static __always_inline void boot_init_stack_canary(void)
  {
  	unsigned long canary;
  
  	/* Try to get a semi random initial value. */
  	get_random_bytes(&canary, sizeof(canary));
  	canary ^= LINUX_VERSION_CODE;
  	canary &= CANARY_MASK;
  
  	current->stack_canary = canary;
  	__stack_chk_guard = current->stack_canary;
  }
  
  #endif /* __ASM_SH_STACKPROTECTOR_H */
  