On Wed, 3 Aug 2016 18:40:46 +1000 Alexey Kardashevskiy <a...@ozlabs.ru> wrote:
> In some situations the userspace memory context may live longer than > the userspace process itself so if we need to do proper memory context > cleanup, we better cache @mm and use it later when the process is gone > (@current or @current->mm are NULL). > > This changes mm_iommu_xxx API to receive mm_struct instead of using one > from @current. > > This is needed by the following patch to do proper cleanup in time. > This depends on "powerpc/powernv/ioda: Fix endianness when reading TCEs" > to do proper cleanup via tce_iommu_clear() patch. > > To keep API consistent, this replaces mm_context_t with mm_struct; > we stick to mm_struct as mm_iommu_adjust_locked_vm() helper needs > access to &mm->mmap_sem. > > This should cause no behavioral change. > > Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru> Reviewed-by: Nicholas Piggin <npig...@gmail.com> I still have some questions about the use of mm in the driver, but those aren't issues introduced by this patch, so as it is I think the bug fix of this and the next patch is good. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
