powerpc/iommu: Stop using @current in mm_iommu_xxx

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[ Upstream commit d7baee6901 ]

This changes mm_iommu_xxx helpers to take mm_struct as a parameter
instead of getting it from @current which in some situations may
not have a valid reference to mm.

This changes helpers to receive @mm and moves all references to @current
to the caller, including checks for !current and !current->mm;
checks in mm_iommu_preregistered() are removed as there is no caller
yet.

This moves the mm_iommu_adjust_locked_vm() call to the caller as
it receives mm_iommu_table_group_mem_t but it needs mm.

This should cause no behavioral change.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Alexey Kardashevskiy 2017-03-17 00:48:27 +00:00 • committed by Greg Kroah-Hartman

parent 2ba7ef2182

commit 5b34666bd2

3 changed files with 36 additions and 40 deletions

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16

arch/powerpc/include/asm/mmu_context.h

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46

arch/powerpc/mm/mmu_context_iommu.c

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14

drivers/vfio/vfio_iommu_spapr_tce.c

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