From 01babeb9e2e73962dd2dc3dff9c881085410fcf1 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Tue, 16 Mar 2021 15:57:18 -0400 Subject: [PATCH] cxl rcu fix Signed-off-by: Liam R. Howlett --- drivers/misc/cxl/fault.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c index b1e5ded5ee90..b26aebb21b09 100644 --- a/drivers/misc/cxl/fault.c +++ b/drivers/misc/cxl/fault.c @@ -324,6 +324,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx) mas.tree = &mm->mm_mt; mmap_read_lock(mm); + 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)) { @@ -338,6 +339,7 @@ static void cxl_prefault_vma(struct cxl_context *ctx) last_esid = slb.esid; } } + rcu_read_unlock(); mmap_read_unlock(mm); mmput(mm); -- 2.50.1