diff options
Diffstat (limited to 'arch/ia64/include/asm/cmpxchg.h')
| -rw-r--r-- | arch/ia64/include/asm/cmpxchg.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/cmpxchg.h b/arch/ia64/include/asm/cmpxchg.h new file mode 100644 index 0000000000..d85ee1a0a2 --- /dev/null +++ b/arch/ia64/include/asm/cmpxchg.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_IA64_CMPXCHG_H +#define _ASM_IA64_CMPXCHG_H + +#include <uapi/asm/cmpxchg.h> + +#define arch_xchg(ptr, x) \ +({(__typeof__(*(ptr))) __arch_xchg((unsigned long) (x), (ptr), sizeof(*(ptr)));}) + +#define arch_cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n)) +#define arch_cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n)) + +#define arch_cmpxchg_local arch_cmpxchg +#define arch_cmpxchg64_local arch_cmpxchg64 + +#ifdef CONFIG_IA64_DEBUG_CMPXCHG +# define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128; +# define CMPXCHG_BUGCHECK(v) \ +do { \ + if (_cmpxchg_bugcheck_count-- <= 0) { \ + void *ip; \ + extern int _printk(const char *fmt, ...); \ + ip = (void *) ia64_getreg(_IA64_REG_IP); \ + _printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v));\ + break; \ + } \ +} while (0) +#else /* !CONFIG_IA64_DEBUG_CMPXCHG */ +# define CMPXCHG_BUGCHECK_DECL +# define CMPXCHG_BUGCHECK(v) +#endif /* !CONFIG_IA64_DEBUG_CMPXCHG */ + +#endif /* _ASM_IA64_CMPXCHG_H */ |