cfd8983f03
We've unconditionally used the queued spinlock for many releases now. Its time to remove the old ticket lock code. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <waiman.long@hpe.com> Cc: Waiman.Long@hpe.com Cc: david.vrabel@citrix.com Cc: dhowells@redhat.com Cc: pbonzini@redhat.com Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20160518184302.GO3193@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
36 lines
925 B
C
36 lines
925 B
C
/*
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* Split spinlock implementation out into its own file, so it can be
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* compiled in a FTRACE-compatible way.
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*/
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#include <linux/spinlock.h>
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#include <linux/export.h>
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#include <linux/jump_label.h>
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#include <asm/paravirt.h>
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__visible void __native_queued_spin_unlock(struct qspinlock *lock)
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{
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native_queued_spin_unlock(lock);
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}
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PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
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bool pv_is_native_spin_unlock(void)
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{
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return pv_lock_ops.queued_spin_unlock.func ==
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__raw_callee_save___native_queued_spin_unlock;
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}
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struct pv_lock_ops pv_lock_ops = {
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#ifdef CONFIG_SMP
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.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
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.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
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.wait = paravirt_nop,
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.kick = paravirt_nop,
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#endif /* SMP */
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};
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EXPORT_SYMBOL(pv_lock_ops);
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struct static_key paravirt_ticketlocks_enabled = STATIC_KEY_INIT_FALSE;
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EXPORT_SYMBOL(paravirt_ticketlocks_enabled);
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