ARM: 6050/1: VFP: fix the SMP versions of vfp_{sync,flush}_hwstate
From: Imre Deak <imre.deak@nokia.com> Recently the UP versions of these functions were refactored and as a side effect it became possible to call them for the current thread. This isn't true for the SMP versions however, so fix this up. Signed-off-by: Imre Deak <imre.deak@nokia.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -428,26 +428,6 @@ static void vfp_pm_init(void)
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static inline void vfp_pm_init(void) { }
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#endif /* CONFIG_PM */
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/*
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* Synchronise the hardware VFP state of a thread other than current with the
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* saved one. This function is used by the ptrace mechanism.
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*/
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#ifdef CONFIG_SMP
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void vfp_sync_hwstate(struct thread_info *thread)
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{
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}
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void vfp_flush_hwstate(struct thread_info *thread)
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{
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/*
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* On SMP systems, the VFP state is automatically saved at every
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* context switch. We mark the thread VFP state as belonging to a
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* non-existent CPU so that the saved one will be reloaded when
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* needed.
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*/
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thread->vfpstate.hard.cpu = NR_CPUS;
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}
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#else
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void vfp_sync_hwstate(struct thread_info *thread)
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{
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unsigned int cpu = get_cpu();
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@ -490,9 +470,18 @@ void vfp_flush_hwstate(struct thread_info *thread)
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last_VFP_context[cpu] = NULL;
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}
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#ifdef CONFIG_SMP
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/*
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* For SMP we still have to take care of the case where the thread
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* migrates to another CPU and then back to the original CPU on which
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* the last VFP user is still the same thread. Mark the thread VFP
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* state as belonging to a non-existent CPU so that the saved one will
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* be reloaded in the above case.
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*/
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thread->vfpstate.hard.cpu = NR_CPUS;
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#endif
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put_cpu();
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}
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#endif
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#include <linux/smp.h>
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