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Message-ID: <20220215144241.3812052-66-Liam.Howlett@oracle.com>
Date: Tue, 15 Feb 2022 14:43:27 +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>
Subject: [PATCH v6 66/71] i915: Use the VMA iterator
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
Replace the linked list in probe_range() with the VMA iterator.
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>
---
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 3cc01c30dd62..59ae919ee109 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -425,12 +425,11 @@ 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;
@@ -438,16 +437,13 @@ 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;
}
/*
--
2.34.1
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