search for: refcount_dec

...nr_symbols [1] v4.20-rc7 : 96502 [2] [1]+full revert : 96705 (+203) [3] [2]+"asm inline": 96568 (-137) [3]: apply my patch, then replace "asm" -> "asm_inline" for _BUG_FLAGS(), refcount_add(), refcount_inc(), refcount_dec(), annotate_reachable(), annotate_unreachable() Changes in v3: - Split into per-commit revert (per Nadav Amit) - Add some cleanups with preprocessor approach Changes in v2: - Revive clean-ups made by 5bdcd510c2ac (per Peter Zijlstra) - Fix commit quoting style (per Peter Zijlstra...

...nr_symbols [1] v4.20-rc7 : 96502 [2] [1]+full revert : 96705 (+203) [3] [2]+"asm inline": 96568 (-137) [3]: apply my patch, then replace "asm" -> "asm_inline" for _BUG_FLAGS(), refcount_add(), refcount_inc(), refcount_dec(), annotate_reachable(), annotate_unreachable() Changes in v3: - Split into per-commit revert (per Nadav Amit) - Add some cleanups with preprocessor approach Changes in v2: - Revive clean-ups made by 5bdcd510c2ac (per Peter Zijlstra) - Fix commit quoting style (per Peter Zijlstra...

...ls > [1] v4.20-rc7 : 96502 > [2] [1]+full revert : 96705 (+203) > [3] [2]+"asm inline": 96568 (-137) > > [3]: apply my patch, then replace "asm" -> "asm_inline" > for _BUG_FLAGS(), refcount_add(), refcount_inc(), refcount_dec(), > annotate_reachable(), annotate_unreachable() > > > Changes in v3: > - Split into per-commit revert (per Nadav Amit) > - Add some cleanups with preprocessor approach > > Changes in v2: > - Revive clean-ups made by 5bdcd510c2ac (per Peter Zijlstra) &gt...

...d? > + * > + * Take note of the device disappearing, so we can ignore unmap request > + * on stale domains (that is, between this detach and the upcoming > + * free.) > + * > + * vdev->vdomain is protected by group->mutex > + */ > + if (vdev->vdomain) > + refcount_dec(&vdev->vdomain->endpoints); > + > + /* DMA to the stack is forbidden, store request on the heap */ > + req = kzalloc(sizeof(*req), GFP_KERNEL); > + if (!req) > + return -ENOMEM; > + > + *req = (struct virtio_iommu_req_attach) { > + .head.type = VIRTIO_IOMMU_T_ATT...

...PREFIX "incl %0\n\t" - "REFCOUNT_CHECK_LT_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LT_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx"); } static __always_inline void refcount_dec(refcount_t *r) { asm volatile(LOCK_PREFIX "decl %0\n\t" - "REFCOUNT_CHECK_LE_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LE_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx&quo...

...+ * the default domain during initial attach.) + * + * Take note of the device disappearing, so we can ignore unmap request + * on stale domains (that is, between this detach and the upcoming + * free.) + * + * vdev->vdomain is protected by group->mutex + */ + if (vdev->vdomain) + refcount_dec(&vdev->vdomain->endpoints); + + /* DMA to the stack is forbidden, store request on the heap */ + req = kzalloc(sizeof(*req), GFP_KERNEL); + if (!req) + return -ENOMEM; + + *req = (struct virtio_iommu_req_attach) { + .head.type = VIRTIO_IOMMU_T_ATTACH, + .domain = cpu_to_le32(vdomain-&...

...PREFIX "incl %0\n\t" - "REFCOUNT_CHECK_LT_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LT_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx"); } static __always_inline void refcount_dec(refcount_t *r) { asm volatile(LOCK_PREFIX "decl %0\n\t" - "REFCOUNT_CHECK_LE_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LE_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx&quo...

...PREFIX "incl %0\n\t" - "REFCOUNT_CHECK_LT_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LT_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx"); } static __always_inline void refcount_dec(refcount_t *r) { asm volatile(LOCK_PREFIX "decl %0\n\t" - "REFCOUNT_CHECK_LE_ZERO counter=\"%[counter]\"" - : [counter] "+m" (r->refs.counter) + REFCOUNT_CHECK_LE_ZERO + : [var] "+m" (r->refs.counter) : : "cc", "cx&quo...

Implement the virtio-iommu driver following version 0.5 of the specification [1]. Previous version of this code was sent back in April [2], implementing the first public RFC. Since then there has been lots of progress and discussion on the specification side, and I think the driver is in a good shape now. The reason patches 1-3 are only RFC is that I'm waiting on feedback from the Virtio TC

Implement the virtio-iommu driver following version 0.5 of the specification [1]. Previous version of this code was sent back in April [2], implementing the first public RFC. Since then there has been lots of progress and discussion on the specification side, and I think the driver is in a good shape now. The reason patches 1-3 are only RFC is that I'm waiting on feedback from the Virtio TC