Messages in this thread | | | Date | Fri, 30 Jul 2021 03:34:35 +0300 | From | Jarkko Sakkinen <> | Subject | Re: [PATCH v3 1/7] x86/sgx: Provide indication of life-cycle of EPC pages |
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On Wed, Jul 28, 2021 at 10:57:07PM +0000, Luck, Tony wrote: > > Wouldn't it be safer to do something like: > > > > page->owner = owner ? owner : (void *)-1; > > > > -1 is non-NULL, but also invalid, which makes it harder for us to poke > > ourselves in the eye. > > Does Linux have some #define INVALID_POINTER thing that > provides a guaranteed bad (e.g. non-canonical) value? > > (void *)-1 seems hacky. > > -Tony
MAP_FAILED?
/Jarkko
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