mutex: __used is needed for function referenced only from inline asm
Impact: fix build failure on llvm-gcc-4.2 According to the gcc manual, the 'used' attribute should be applied to functions referenced only from inline assembly. This fixes a build failure with llvm-gcc-4.2, which deleted __mutex_lock_slowpath, __mutex_unlock_slowpath. Signed-off-by: Török Edwin <edwintorok@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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1 changed files with 4 additions and 4 deletions
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@ -59,7 +59,7 @@ EXPORT_SYMBOL(__mutex_init);
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* We also put the fastpath first in the kernel image, to make sure the
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* branch is predicted by the CPU as default-untaken.
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*/
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static void noinline __sched
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static __used noinline void __sched
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__mutex_lock_slowpath(atomic_t *lock_count);
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/***
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@ -96,7 +96,7 @@ void inline __sched mutex_lock(struct mutex *lock)
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EXPORT_SYMBOL(mutex_lock);
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#endif
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static noinline void __sched __mutex_unlock_slowpath(atomic_t *lock_count);
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static __used noinline void __sched __mutex_unlock_slowpath(atomic_t *lock_count);
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/***
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* mutex_unlock - release the mutex
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@ -268,7 +268,7 @@ __mutex_unlock_common_slowpath(atomic_t *lock_count, int nested)
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/*
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* Release the lock, slowpath:
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*/
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static noinline void
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static __used noinline void
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__mutex_unlock_slowpath(atomic_t *lock_count)
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{
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__mutex_unlock_common_slowpath(lock_count, 1);
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@ -313,7 +313,7 @@ int __sched mutex_lock_killable(struct mutex *lock)
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}
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EXPORT_SYMBOL(mutex_lock_killable);
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static noinline void __sched
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static __used noinline void __sched
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__mutex_lock_slowpath(atomic_t *lock_count)
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{
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struct mutex *lock = container_of(lock_count, struct mutex, count);
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