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Date: Sun, 17 Jul 2022 02:46:57 +0000 From: Liam Howlett <liam.howlett@...cle.com> To: "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, Yu Zhao <yuzhao@...gle.com>, Hugh Dickins <hughd@...gle.com> Subject: [PATCH v11 64/69] i915: use the VMA iterator From: "Matthew Wilcox (Oracle)" <willy@...radead.org> Replace the linked list in probe_range() with the VMA iterator. Link: https://lkml.kernel.org/r/20220504011345.662299-49-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20220621204632.3370049-65-Liam.Howlett@oracle.com Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org> Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com> Acked-by: Vlastimil Babka <vbabka@...e.cz> Cc: Catalin Marinas <catalin.marinas@....com> Cc: David Howells <dhowells@...hat.com> Cc: SeongJae Park <sj@...nel.org> Cc: Will Deacon <will@...nel.org> Cc: Davidlohr Bueso <dave@...olabs.net> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org> --- drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c index 094f06b4ce33..a509f7da104b 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c @@ -426,12 +426,11 @@ static const struct drm_i915_gem_object_ops i915_gem_userptr_ops = { static int probe_range(struct mm_struct *mm, unsigned long addr, unsigned long len) { - const unsigned long end = addr + len; + VMA_ITERATOR(vmi, mm, addr); struct vm_area_struct *vma; - int ret = -EFAULT; mmap_read_lock(mm); - for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) { + for_each_vma_range(vmi, vma, addr + len) { /* Check for holes, note that we also update the addr below */ if (vma->vm_start > addr) break; @@ -439,16 +438,13 @@ probe_range(struct mm_struct *mm, unsigned long addr, unsigned long len) if (vma->vm_flags & (VM_PFNMAP | VM_MIXEDMAP)) break; - if (vma->vm_end >= end) { - ret = 0; - break; - } - addr = vma->vm_end; } mmap_read_unlock(mm); - return ret; + if (vma) + return -EFAULT; + return 0; } /* -- 2.35.1
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