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Merge commit 'e81a0e771c10de86fdb52c6baf534ff5fdeec72c' into topic/soix
Need to have a baseline of drm-next + acpi-next to merge new cool SOix features for 3.17. No conflicts, so won't cause trouble. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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/* | ||
* IA64 specific ACPICA environments and implementation | ||
* | ||
* Copyright (C) 2014, Intel Corporation | ||
* Author: Lv Zheng <lv.zheng@intel.com> | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License version 2 as | ||
* published by the Free Software Foundation. | ||
*/ | ||
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#ifndef _ASM_IA64_ACENV_H | ||
#define _ASM_IA64_ACENV_H | ||
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#include <asm/intrinsics.h> | ||
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#define COMPILER_DEPENDENT_INT64 long | ||
#define COMPILER_DEPENDENT_UINT64 unsigned long | ||
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/* Asm macros */ | ||
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#ifdef CONFIG_ACPI | ||
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static inline int | ||
ia64_acpi_acquire_global_lock(unsigned int *lock) | ||
{ | ||
unsigned int old, new, val; | ||
do { | ||
old = *lock; | ||
new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); | ||
val = ia64_cmpxchg4_acq(lock, new, old); | ||
} while (unlikely (val != old)); | ||
return (new < 3) ? -1 : 0; | ||
} | ||
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static inline int | ||
ia64_acpi_release_global_lock(unsigned int *lock) | ||
{ | ||
unsigned int old, new, val; | ||
do { | ||
old = *lock; | ||
new = old & ~0x3; | ||
val = ia64_cmpxchg4_acq(lock, new, old); | ||
} while (unlikely (val != old)); | ||
return old & 0x1; | ||
} | ||
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#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \ | ||
((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock)) | ||
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#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \ | ||
((Acq) = ia64_acpi_release_global_lock(&facs->global_lock)) | ||
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#endif | ||
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#endif /* _ASM_IA64_ACENV_H */ |
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