/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_MICROBLAZE_CMPXCHG_H #define _ASM_MICROBLAZE_CMPXCHG_H #include <linux/irqflags.h> void __bad_xchg(volatile void *ptr, int size); static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size) { unsigned long ret; unsigned long flags; switch (size) { case 1: local_irq_save(flags); ret = *(volatile unsigned char *)ptr; *(volatile unsigned char *)ptr = x; local_irq_restore(flags); break; case 4: local_irq_save(flags); ret = *(volatile unsigned long *)ptr; *(volatile unsigned long *)ptr = x; local_irq_restore(flags); break; default: __bad_xchg(ptr, size), ret = 0; break; } return ret; } #define xchg(ptr, x) \ ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) #include <asm-generic/cmpxchg.h> #include <asm-generic/cmpxchg-local.h> #endif /* _ASM_MICROBLAZE_CMPXCHG_H */