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Date: Fri, 22 Feb 2019 11:02:13 -0800
From: Ralph Campbell <rcampbell@...dia.com>
To: <jglisse@...hat.com>, <linux-mm@...ck.org>,
Andrew Morton <akpm@...ux-foundation.org>
CC: <linux-kernel@...r.kernel.org>,
Christian König <christian.koenig@....com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>, Jan Kara <jack@...e.cz>,
Andrea Arcangeli <aarcange@...hat.com>,
Peter Xu <peterx@...hat.com>,
Felix Kuehling <Felix.Kuehling@....com>,
Jason Gunthorpe <jgg@...lanox.com>,
Ross Zwisler <zwisler@...nel.org>,
Dan Williams <dan.j.williams@...el.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Radim Krčmář <rkrcmar@...hat.com>,
Michal Hocko <mhocko@...nel.org>,
John Hubbard <jhubbard@...dia.com>, <kvm@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>, <linux-rdma@...r.kernel.org>,
Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v5 2/9] mm/mmu_notifier: convert user range->blockable to
helper function
On 2/19/19 12:04 PM, jglisse@...hat.com wrote:
> From: Jérôme Glisse <jglisse@...hat.com>
>
> Use the mmu_notifier_range_blockable() helper function instead of
> directly dereferencing the range->blockable field. This is done to
> make it easier to change the mmu_notifier range field.
>
> This patch is the outcome of the following coccinelle patch:
>
> %<-------------------------------------------------------------------
> @@
> identifier I1, FN;
> @@
> FN(..., struct mmu_notifier_range *I1, ...) {
> <...
> -I1->blockable
> +mmu_notifier_range_blockable(I1)
> ...>
> }
> ------------------------------------------------------------------->%
>
> spatch --in-place --sp-file blockable.spatch --dir .
>
> Signed-off-by: Jérôme Glisse <jglisse@...hat.com>
> Cc: Christian König <christian.koenig@....com>
> Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
> Cc: Jani Nikula <jani.nikula@...ux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
> Cc: Jan Kara <jack@...e.cz>
> Cc: Andrea Arcangeli <aarcange@...hat.com>
> Cc: Peter Xu <peterx@...hat.com>
> Cc: Felix Kuehling <Felix.Kuehling@....com>
> Cc: Jason Gunthorpe <jgg@...lanox.com>
> Cc: Ross Zwisler <zwisler@...nel.org>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim Krčmář <rkrcmar@...hat.com>
> Cc: Michal Hocko <mhocko@...nel.org>
> Cc: Christian Koenig <christian.koenig@....com>
> Cc: Ralph Campbell <rcampbell@...dia.com>
> Cc: John Hubbard <jhubbard@...dia.com>
> Cc: kvm@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org
> Cc: linux-rdma@...r.kernel.org
> Cc: Arnd Bergmann <arnd@...db.de>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c | 8 ++++----
> drivers/gpu/drm/i915/i915_gem_userptr.c | 2 +-
> drivers/gpu/drm/radeon/radeon_mn.c | 4 ++--
> drivers/infiniband/core/umem_odp.c | 5 +++--
> drivers/xen/gntdev.c | 6 +++---
> mm/hmm.c | 6 +++---
> mm/mmu_notifier.c | 2 +-
> virt/kvm/kvm_main.c | 3 ++-
> 8 files changed, 19 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> index 3e6823fdd939..58ed401c5996 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c
> @@ -256,14 +256,14 @@ static int amdgpu_mn_invalidate_range_start_gfx(struct mmu_notifier *mn,
> /* TODO we should be able to split locking for interval tree and
> * amdgpu_mn_invalidate_node
> */
> - if (amdgpu_mn_read_lock(amn, range->blockable))
> + if (amdgpu_mn_read_lock(amn, mmu_notifier_range_blockable(range)))
> return -EAGAIN;
>
> it = interval_tree_iter_first(&amn->objects, range->start, end);
> while (it) {
> struct amdgpu_mn_node *node;
>
> - if (!range->blockable) {
> + if (!mmu_notifier_range_blockable(range)) {
> amdgpu_mn_read_unlock(amn);
> return -EAGAIN;
> }
> @@ -299,7 +299,7 @@ static int amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
> /* notification is exclusive, but interval is inclusive */
> end = range->end - 1;
>
> - if (amdgpu_mn_read_lock(amn, range->blockable))
> + if (amdgpu_mn_read_lock(amn, mmu_notifier_range_blockable(range)))
> return -EAGAIN;
>
> it = interval_tree_iter_first(&amn->objects, range->start, end);
> @@ -307,7 +307,7 @@ static int amdgpu_mn_invalidate_range_start_hsa(struct mmu_notifier *mn,
> struct amdgpu_mn_node *node;
> struct amdgpu_bo *bo;
>
> - if (!range->blockable) {
> + if (!mmu_notifier_range_blockable(range)) {
> amdgpu_mn_read_unlock(amn);
> return -EAGAIN;
> }
> diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
> index 1d3f9a31ad61..777b3f8727e7 100644
> --- a/drivers/gpu/drm/i915/i915_gem_userptr.c
> +++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
> @@ -122,7 +122,7 @@ userptr_mn_invalidate_range_start(struct mmu_notifier *_mn,
> while (it) {
> struct drm_i915_gem_object *obj;
>
> - if (!range->blockable) {
> + if (!mmu_notifier_range_blockable(range)) {
> ret = -EAGAIN;
> break;
> }
> diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c
> index b3019505065a..c9bd1278f573 100644
> --- a/drivers/gpu/drm/radeon/radeon_mn.c
> +++ b/drivers/gpu/drm/radeon/radeon_mn.c
> @@ -133,7 +133,7 @@ static int radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
> /* TODO we should be able to split locking for interval tree and
> * the tear down.
> */
> - if (range->blockable)
> + if (mmu_notifier_range_blockable(range))
> mutex_lock(&rmn->lock);
> else if (!mutex_trylock(&rmn->lock))
> return -EAGAIN;
> @@ -144,7 +144,7 @@ static int radeon_mn_invalidate_range_start(struct mmu_notifier *mn,
> struct radeon_bo *bo;
> long r;
>
> - if (!range->blockable) {
> + if (!mmu_notifier_range_blockable(range)) {
> ret = -EAGAIN;
> goto out_unlock;
> }
> diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c
> index 012044f16d1c..3a3f1538d295 100644
> --- a/drivers/infiniband/core/umem_odp.c
> +++ b/drivers/infiniband/core/umem_odp.c
> @@ -151,7 +151,7 @@ static int ib_umem_notifier_invalidate_range_start(struct mmu_notifier *mn,
> struct ib_ucontext_per_mm *per_mm =
> container_of(mn, struct ib_ucontext_per_mm, mn);
>
> - if (range->blockable)
> + if (mmu_notifier_range_blockable(range))
> down_read(&per_mm->umem_rwsem);
> else if (!down_read_trylock(&per_mm->umem_rwsem))
> return -EAGAIN;
> @@ -169,7 +169,8 @@ static int ib_umem_notifier_invalidate_range_start(struct mmu_notifier *mn,
> return rbt_ib_umem_for_each_in_range(&per_mm->umem_tree, range->start,
> range->end,
> invalidate_range_start_trampoline,
> - range->blockable, NULL);
> + mmu_notifier_range_blockable(range),
> + NULL);
> }
>
> static int invalidate_range_end_trampoline(struct ib_umem_odp *item, u64 start,
> diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
> index 5efc5eee9544..9da8f7192f46 100644
> --- a/drivers/xen/gntdev.c
> +++ b/drivers/xen/gntdev.c
> @@ -526,20 +526,20 @@ static int mn_invl_range_start(struct mmu_notifier *mn,
> struct gntdev_grant_map *map;
> int ret = 0;
>
> - if (range->blockable)
> + if (mmu_notifier_range_blockable(range))
> mutex_lock(&priv->lock);
> else if (!mutex_trylock(&priv->lock))
> return -EAGAIN;
>
> list_for_each_entry(map, &priv->maps, next) {
> ret = unmap_if_in_range(map, range->start, range->end,
> - range->blockable);
> + mmu_notifier_range_blockable(range));
> if (ret)
> goto out_unlock;
> }
> list_for_each_entry(map, &priv->freeable_maps, next) {
> ret = unmap_if_in_range(map, range->start, range->end,
> - range->blockable);
> + mmu_notifier_range_blockable(range));
> if (ret)
> goto out_unlock;
> }
> diff --git a/mm/hmm.c b/mm/hmm.c
> index 3c9781037918..a03b5083d880 100644
> --- a/mm/hmm.c
> +++ b/mm/hmm.c
> @@ -205,9 +205,9 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
> update.start = nrange->start;
> update.end = nrange->end;
> update.event = HMM_UPDATE_INVALIDATE;
> - update.blockable = nrange->blockable;
> + update.blockable = mmu_notifier_range_blockable(nrange);
>
> - if (nrange->blockable)
> + if (mmu_notifier_range_blockable(nrange))
> mutex_lock(&hmm->lock);
> else if (!mutex_trylock(&hmm->lock)) {
> ret = -EAGAIN;
> @@ -222,7 +222,7 @@ static int hmm_invalidate_range_start(struct mmu_notifier *mn,
> }
> mutex_unlock(&hmm->lock);
>
> - if (nrange->blockable)
> + if (mmu_notifier_range_blockable(nrange))
> down_read(&hmm->mirrors_sem);
> else if (!down_read_trylock(&hmm->mirrors_sem)) {
> ret = -EAGAIN;
> diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
> index 9c884abc7850..abd88c466eb2 100644
> --- a/mm/mmu_notifier.c
> +++ b/mm/mmu_notifier.c
> @@ -180,7 +180,7 @@ int __mmu_notifier_invalidate_range_start(struct mmu_notifier_range *range)
> if (_ret) {
> pr_info("%pS callback failed with %d in %sblockable context.\n",
> mn->ops->invalidate_range_start, _ret,
> - !range->blockable ? "non-" : "");
> + !mmu_notifier_range_blockable(range) ? "non-" : "");
> ret = _ret;
> }
> }
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 38df17b7760e..629760c0fb95 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -386,7 +386,8 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
> spin_unlock(&kvm->mmu_lock);
>
> ret = kvm_arch_mmu_notifier_invalidate_range(kvm, range->start,
> - range->end, range->blockable);
> + range->end,
> + mmu_notifier_range_blockable(range));
>
> srcu_read_unlock(&kvm->srcu, idx);
>
>
Reviewed-by: Ralph Campbell <rcampbell@...dia.com>
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