From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Xu Subject: [PATCH 2/2] iommu/amd: Remove clear_flush_young notifier Date: Wed, 30 Jan 2019 13:57:58 +0800 Message-ID: <20190130055758.3994-3-peterx@redhat.com> References: <20190130055758.3994-1-peterx@redhat.com> Return-path: In-Reply-To: <20190130055758.3994-1-peterx@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: joro@8bytes.org, Jason Wang , peterx@redhat.com, Jerome Glisse List-Id: iommu@lists.linux-foundation.org AMD IOMMU driver is using the clear_flush_young() to do cache flushing but that's actually already covered by invalidate_range(). Remove the extra notifier and the chunks. Signed-off-by: Peter Xu --- drivers/iommu/amd_iommu_v2.c | 24 ------------------------ 1 file changed, 24 deletions(-) diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 23dae9348ace..5d7ef750e4a0 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -370,29 +370,6 @@ static struct pasid_state *mn_to_state(struct mmu_notifier *mn) return container_of(mn, struct pasid_state, mn); } -static void __mn_flush_page(struct mmu_notifier *mn, - unsigned long address) -{ - struct pasid_state *pasid_state; - struct device_state *dev_state; - - pasid_state = mn_to_state(mn); - dev_state = pasid_state->device_state; - - amd_iommu_flush_page(dev_state->domain, pasid_state->pasid, address); -} - -static int mn_clear_flush_young(struct mmu_notifier *mn, - struct mm_struct *mm, - unsigned long start, - unsigned long end) -{ - for (; start < end; start += PAGE_SIZE) - __mn_flush_page(mn, start); - - return 0; -} - static void mn_invalidate_range(struct mmu_notifier *mn, struct mm_struct *mm, unsigned long start, unsigned long end) @@ -430,7 +407,6 @@ static void mn_release(struct mmu_notifier *mn, struct mm_struct *mm) static const struct mmu_notifier_ops iommu_mn = { .release = mn_release, - .clear_flush_young = mn_clear_flush_young, .invalidate_range = mn_invalidate_range, }; -- 2.17.1