Re: [PATCH v8 20/26] powerpc: book3s64: convert to pin_user_pages() and put_user_page()
From: John Hubbard <jhubbard@nvidia.com>
Date: 2019-12-09 23:46:45
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On 12/9/19 2:53 PM, John Hubbard wrote: ...
quoted hunk ↗ jump to hunk
@@ -212,10 +211,9 @@ static void mm_iommu_unpin(struct mm_iommu_table_group_mem_t *mem) if (!page) continue; - if (mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY) - SetPageDirty(page); + put_user_pages_dirty_lock(&page, 1, + mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY); - put_page(page);
Correction: this is somehow missing the fixes that resulted from Jan Kara's review (he noted that we can't take a page lock in this context). I must have picked up the wrong version of it, when I rebased for -rc1. Will fix in the next version (including the commit description). Here's what the corrected hunk will look like:
@@ -215,7 +214,8 @@ static void mm_iommu_unpin(struct mm_iommu_table_group_mem_t *mem) if (mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY) SetPageDirty(page); - put_page(page); + put_user_page(page); + mem->hpas[i] = 0; } }
thanks, -- John Hubbard NVIDIA