Re: [PATCH v5 2/9] mm/mmu_notifier: convert user range->blockable to helper function
From: Ralph Campbell
Date: Fri Feb 22 2019 - 14:02:19 EST
On 2/19/19 12:04 PM, jglisse@xxxxxxxxxx wrote:
From: JÃrÃme Glisse <jglisse@xxxxxxxxxx>
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: JÃrÃme Glisse <jglisse@xxxxxxxxxx>
Cc: Christian KÃnig <christian.koenig@xxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Cc: Ross Zwisler <zwisler@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-rdma@xxxxxxxxxxxxxxx
Cc: Arnd Bergmann <arnd@xxxxxxxx>
---
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@xxxxxxxxxx>