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: /lib/modules/5.11.0-1022-aws/build/arch/c6x/include/asm/ [ drwxr-xr-x ]
name : cmpxchg.h /* SPDX-License-Identifier: GPL-2.0-only */ /* * Port on Texas Instruments TMS320C6x architecture * * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) */ #ifndef _ASM_C6X_CMPXCHG_H #define _ASM_C6X_CMPXCHG_H #include <linux/irqflags.h> /* * Misc. functions */ static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size) { unsigned int tmp; unsigned long flags; local_irq_save(flags); switch (size) { case 1: tmp = 0; tmp = *((unsigned char *) ptr); *((unsigned char *) ptr) = (unsigned char) x; break; case 2: tmp = 0; tmp = *((unsigned short *) ptr); *((unsigned short *) ptr) = x; break; case 4: tmp = 0; tmp = *((unsigned int *) ptr); *((unsigned int *) ptr) = x; break; } local_irq_restore(flags); return tmp; } #define xchg(ptr, x) \ ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \ sizeof(*(ptr)))) #include <asm-generic/cmpxchg-local.h> /* * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make * them available. */ #define cmpxchg_local(ptr, o, n) \ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \ (unsigned long)(o), \ (unsigned long)(n), \ sizeof(*(ptr)))) #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) #include <asm-generic/cmpxchg.h> #endif /* _ASM_C6X_CMPXCHG_H */