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| author | Imre Deak <imre.deak@nokia.com> | 2010-04-11 18:57:07 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-04-14 14:11:30 +0400 |
| commit | 5c5cac63851f347d8308d69f1892c4af51d7c1a4 (patch) | |
| tree | b99f2f97c3ac2bc58b906db62a097ae7b24828b5 /arch/arm/vfp/vfpmodule.c | |
| parent | 7e5a69e83ba7a0d5917ad830f417cba8b8d6aa72 (diff) | |
| download | linux-5c5cac63851f347d8308d69f1892c4af51d7c1a4.tar.xz | |
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>
Diffstat (limited to 'arch/arm/vfp/vfpmodule.c')
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 31 |
1 files changed, 10 insertions, 21 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index a420cb949328..315a540c7ce5 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -428,26 +428,6 @@ static void vfp_pm_init(void) static inline void vfp_pm_init(void) { } #endif /* CONFIG_PM */ -/* - * Synchronise the hardware VFP state of a thread other than current with the - * saved one. This function is used by the ptrace mechanism. - */ -#ifdef CONFIG_SMP -void vfp_sync_hwstate(struct thread_info *thread) -{ -} - -void vfp_flush_hwstate(struct thread_info *thread) -{ - /* - * On SMP systems, the VFP state is automatically saved at every - * context switch. We mark the thread VFP state as belonging to a - * non-existent CPU so that the saved one will be reloaded when - * needed. - */ - thread->vfpstate.hard.cpu = NR_CPUS; -} -#else void vfp_sync_hwstate(struct thread_info *thread) { unsigned int cpu = get_cpu(); @@ -490,9 +470,18 @@ void vfp_flush_hwstate(struct thread_info *thread) last_VFP_context[cpu] = NULL; } +#ifdef CONFIG_SMP + /* + * For SMP we still have to take care of the case where the thread + * migrates to another CPU and then back to the original CPU on which + * the last VFP user is still the same thread. Mark the thread VFP + * state as belonging to a non-existent CPU so that the saved one will + * be reloaded in the above case. + */ + thread->vfpstate.hard.cpu = NR_CPUS; +#endif put_cpu(); } -#endif #include <linux/smp.h> |