Re: [PATCH 1/2] IB/mad: Agent registration is process context only

[Jason Gunthorpe]

On Fri, Jun 08, 2018 at 10:42:17AM -0700, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> 
> Document this (it's implicitly true due to sleeping operations already
> in use in both registration and deregistration).  Use this fact to use
> spin_lock_irq instead of spin_lock_irqsave.  This improves performance
> slightly.
> 
> Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> ---
>  drivers/infiniband/core/mad.c | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)

In the mean time, this patch is straightfoward, applied to the interm
for-next..

Jason