Re: [PATCH v1 0/2] net: xfrm: Use seqcount_spinlock_t

[Steffen Klassert]

On Tue, Mar 16, 2021 at 11:56:28AM +0100, Ahmed S. Darwish wrote:
> Hi,
> 
> This is a small series to trasform xfrm_state_hash_generation sequence
> counter to seqcount_spinlock_t, instead of plain seqcount_t.
> 
> In general, seqcount_LOCKNAME_t sequence counters allows to associate
> the lock used for write serialization with the seqcount. This enables
> lockdep to verify that the write serialization lock is always held
> before entering the seqcount write section.
> 
> If lockdep is disabled, this lock association is compiled out and has
> neither storage size nor runtime overhead.
> 
> The first patch is a general mainline fix, and has a Fixes tag.
> 
> Thanks,
> 
> 8<----------
> 
> Ahmed S. Darwish (2):
>   net: xfrm: Localize sequence counter per network namespace
>   net: xfrm: Use sequence counter with associated spinlock

Applied to the ipsec tree, thanks a lot!