[PATCH v2 31/61] drivers/misc/cxl: Use maple tree iterators for cxl_prefault_vma()
From: Liam Howlett <hidden>
Date: 2021-08-17 15:54:57
Also in:
lkml
Subsystem:
char and misc drivers, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Linus Torvalds
From: "Liam R. Howlett" <redacted> Signed-off-by: Liam R. Howlett <redacted> --- drivers/misc/cxl/fault.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index 60c829113299..60a33b953ef4 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c@@ -313,6 +313,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx) struct vm_area_struct *vma; int rc; struct mm_struct *mm; + MA_STATE(mas, NULL, 0, 0); mm = get_mem_context(ctx); if (mm == NULL) {
@@ -321,8 +322,10 @@ static void cxl_prefault_vma(struct cxl_context *ctx) return; } + mas.tree = &mm->mm_mt; mmap_read_lock(mm); - for (vma = mm->mmap; vma; vma = vma->vm_next) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { for (ea = vma->vm_start; ea < vma->vm_end; ea = next_segment(ea, slb.vsid)) { rc = copro_calculate_slb(mm, ea, &slb);
@@ -336,6 +339,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx) last_esid = slb.esid; } } + rcu_read_unlock(); mmap_read_unlock(mm); mmput(mm);
--
2.30.2