linux-kernel - [PATCH v3 64/66] i915: Use the maple tree iterator for vdso

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Date:   Tue, 5 Oct 2021 01:31:15 +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>,
        David Hildenbrand <david@...hat.com>,
        Douglas Gilbert <dgilbert@...erlog.com>
CC:     Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v3 64/66] i915: Use the maple tree iterator for vdso

Remove the use of the vma linked list in favour of mas_for_each()

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 8ea0fa665e53..a67d62159e5b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -423,11 +423,12 @@ static int
 probe_range(struct mm_struct *mm, unsigned long addr, unsigned long len)
 {
 	const unsigned long end = addr + len;
+	MA_STATE(mas, &mm->mm_mt, addr, addr);
 	struct vm_area_struct *vma;
 	int ret = -EFAULT;
 
 	mmap_read_lock(mm);
-	for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
+	mas_for_each(&mas, vma, ULONG_MAX) {
 		/* Check for holes, note that we also update the addr below */
 		if (vma->vm_start > addr)
 			break;
-- 
2.30.2