Messages in this thread | | | Date | Tue, 22 May 2018 19:21:16 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH RT] arm64: fpsimd: use a local_lock() in addition to local_bh_disable() |
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On 2018-05-22 13:10:04 [-0400], Steven Rostedt wrote: > On Thu, 17 May 2018 14:40:06 +0200 > Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote: > > > +static DEFINE_LOCAL_IRQ_LOCK(fpsimd_lock); > > /* > > * Update current's FPSIMD/SVE registers from thread_struct. > > * > > @@ -594,6 +595,7 @@ int sve_set_vector_length(struct task_struct *task, > > * non-SVE thread. > > */ > > if (task == current) { > > + local_lock(fpsimd_lock); > > local_bh_disable(); > > I'm surprised that we don't have a "local_lock_bh()"?
right. Like the last time when we introduced a global lock with no locking context?
> -- Steve > > > > > task_fpsimd_save();
Sebastian
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