/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_RISCV_STACKPROTECTOR_H#define _ASM_RISCV_STACKPROTECTOR_H #include <linux/random.h>#include <linux/version.h>#include <asm/timex.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;	unsigned long tsc; 	/* Try to get a semi random initial value. */	get_random_bytes(&canary, sizeof(canary));	tsc = get_cycles();	canary += tsc + (tsc << BITS_PER_LONG/2);	canary ^= LINUX_VERSION_CODE;	canary &= CANARY_MASK; 	current->stack_canary = canary;	__stack_chk_guard = current->stack_canary;}#endif /* _ASM_RISCV_STACKPROTECTOR_H */