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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_SCORE_CMPXCHG_H #define _ASM_SCORE_CMPXCHG_H #include <linux/irqflags.h> struct __xchg_dummy { unsigned long a[100]; }; #define __xg(x) ((struct __xchg_dummy *)(x)) static inline unsigned long __xchg(volatile unsigned long *m, unsigned long val) { unsigned long retval; unsigned long flags; local_irq_save(flags); retval = *m; *m = val; local_irq_restore(flags); return retval; } #define xchg(ptr, v) \ ((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr), \ (unsigned long)(v))) static inline unsigned long __cmpxchg(volatile unsigned long *m, unsigned long old, unsigned long new) { unsigned long retval; unsigned long flags; local_irq_save(flags); retval = *m; if (retval == old) *m = new; local_irq_restore(flags); return retval; } #define cmpxchg(ptr, o, n) \ ((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \ (unsigned long)(o), \ (unsigned long)(n))) #include <asm-generic/cmpxchg-local.h> #endif /* _ASM_SCORE_CMPXCHG_H */