diff options
Diffstat (limited to 'arch/ia64/include/uapi/asm/cmpxchg.h')
| -rw-r--r-- | arch/ia64/include/uapi/asm/cmpxchg.h | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/arch/ia64/include/uapi/asm/cmpxchg.h b/arch/ia64/include/uapi/asm/cmpxchg.h deleted file mode 100644 index d69c979936d4..000000000000 --- a/arch/ia64/include/uapi/asm/cmpxchg.h +++ /dev/null @@ -1,155 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ -#ifndef _ASM_IA64_CMPXCHG_H -#define _ASM_IA64_CMPXCHG_H - -/* - * Compare/Exchange, forked from asm/intrinsics.h - * which was: - * - * Copyright (C) 2002-2003 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - */ - -#ifndef __ASSEMBLY__ - -#include <linux/types.h> -/* include compiler specific intrinsics */ -#include <asm/ia64regs.h> -#ifdef __INTEL_COMPILER -# include <asm/intel_intrin.h> -#else -# include <asm/gcc_intrin.h> -#endif - -/* - * This function doesn't exist, so you'll get a linker error if - * something tries to do an invalid xchg(). - */ -extern void ia64_xchg_called_with_bad_pointer(void); - -#define __xchg(x, ptr, size) \ -({ \ - unsigned long __xchg_result; \ - \ - switch (size) { \ - case 1: \ - __xchg_result = ia64_xchg1((__u8 *)ptr, x); \ - break; \ - \ - case 2: \ - __xchg_result = ia64_xchg2((__u16 *)ptr, x); \ - break; \ - \ - case 4: \ - __xchg_result = ia64_xchg4((__u32 *)ptr, x); \ - break; \ - \ - case 8: \ - __xchg_result = ia64_xchg8((__u64 *)ptr, x); \ - break; \ - default: \ - ia64_xchg_called_with_bad_pointer(); \ - } \ - __xchg_result; \ -}) - -#define xchg(ptr, x) \ -((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr)))) - -/* - * Atomic compare and exchange. Compare OLD with MEM, if identical, - * store NEW in MEM. Return the initial value in MEM. Success is - * indicated by comparing RETURN with OLD. - */ - -/* - * This function doesn't exist, so you'll get a linker error - * if something tries to do an invalid cmpxchg(). - */ -extern long ia64_cmpxchg_called_with_bad_pointer(void); - -#define ia64_cmpxchg(sem, ptr, old, new, size) \ -({ \ - __u64 _o_, _r_; \ - \ - switch (size) { \ - case 1: \ - _o_ = (__u8) (long) (old); \ - break; \ - case 2: \ - _o_ = (__u16) (long) (old); \ - break; \ - case 4: \ - _o_ = (__u32) (long) (old); \ - break; \ - case 8: \ - _o_ = (__u64) (long) (old); \ - break; \ - default: \ - break; \ - } \ - switch (size) { \ - case 1: \ - _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \ - break; \ - \ - case 2: \ - _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \ - break; \ - \ - case 4: \ - _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \ - break; \ - \ - case 8: \ - _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \ - break; \ - \ - default: \ - _r_ = ia64_cmpxchg_called_with_bad_pointer(); \ - break; \ - } \ - (__typeof__(old)) _r_; \ -}) - -#define cmpxchg_acq(ptr, o, n) \ - ia64_cmpxchg(acq, (ptr), (o), (n), sizeof(*(ptr))) -#define cmpxchg_rel(ptr, o, n) \ - ia64_cmpxchg(rel, (ptr), (o), (n), sizeof(*(ptr))) - -/* - * Worse still - early processor implementations actually just ignored - * the acquire/release and did a full fence all the time. Unfortunately - * this meant a lot of badly written code that used .acq when they really - * wanted .rel became legacy out in the wild - so when we made a cpu - * that strictly did the .acq or .rel ... all that code started breaking - so - * we had to back-pedal and keep the "legacy" behavior of a full fence :-( - */ - -/* for compatibility with other platforms: */ -#define cmpxchg(ptr, o, n) cmpxchg_acq((ptr), (o), (n)) -#define cmpxchg64(ptr, o, n) cmpxchg_acq((ptr), (o), (n)) - -#define cmpxchg_local cmpxchg -#define cmpxchg64_local 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 /* !__ASSEMBLY__ */ - -#endif /* _ASM_IA64_CMPXCHG_H */ |