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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1fb00c6cbd
It seems ppc64 wants to lock mutexes in early bootup code, with interrupts disabled, and they expect interrupts to stay disabled, else they crash. Work around this bug by making mutex debugging variants save/restore irq flags. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/*
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* Mutexes: blocking mutual exclusion locks
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*
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* started by Ingo Molnar:
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*
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* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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*
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* This file contains mutex debugging related internal prototypes, for the
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* !CONFIG_DEBUG_MUTEXES case. Most of them are NOPs:
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*/
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#define spin_lock_mutex(lock, flags) \
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do { spin_lock(lock); (void)(flags); } while (0)
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#define spin_unlock_mutex(lock, flags) \
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do { spin_unlock(lock); (void)(flags); } while (0)
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#define mutex_remove_waiter(lock, waiter, ti) \
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__list_del((waiter)->list.prev, (waiter)->list.next)
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#define DEBUG_WARN_ON(c) do { } while (0)
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#define debug_mutex_set_owner(lock, new_owner) do { } while (0)
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#define debug_mutex_clear_owner(lock) do { } while (0)
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#define debug_mutex_init_waiter(waiter) do { } while (0)
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#define debug_mutex_wake_waiter(lock, waiter) do { } while (0)
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#define debug_mutex_free_waiter(waiter) do { } while (0)
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#define debug_mutex_add_waiter(lock, waiter, ti, ip) do { } while (0)
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#define debug_mutex_unlock(lock) do { } while (0)
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#define debug_mutex_init(lock, name) do { } while (0)
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/*
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* Return-address parameters/declarations. They are very useful for
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* debugging, but add overhead in the !DEBUG case - so we go the
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* trouble of using this not too elegant but zero-cost solution:
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*/
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#define __IP_DECL__
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#define __IP__
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#define __RET_IP__
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