[PATCH] powerpc: thp: Add write barrier after updating the valid bit
Benjamin Herrenschmidt
benh at kernel.crashing.org
Tue Jul 29 17:00:44 EST 2014
On Tue, 2014-07-29 at 12:25 +0530, Aneesh Kumar K.V wrote:
> We want to make sure for usage like below we don't reorder the load.
>
> if (pmd_trans_huge(*pmdp)){
>
> get_hpte_slot_array(pmdp)
> }
Shouldn't we also make sure that we don't have lock set ? (In case it's
in the middle of being updated).
Cheers,
Ben.
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