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Subject[PATCH] mm: Elide a warning when casting void* -> enum
From: Palmer Dabbelt <>

I recently build the RISC-V port with LLVM trunk, which has introduced a
new warning when casting from a pointer to an enum of a smaller size.
This patch simply casts to a long in the middle to stop the warning.
I'd be surprised this is the only one in the kernel, but it's the only
one I saw.

Signed-off-by: Palmer Dabbelt <>
mm/rmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/rmap.c b/mm/rmap.c
index b3e381919835..b15e9edde2ac 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1376,7 +1376,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
struct page *subpage;
bool ret = true;
struct mmu_notifier_range range;
- enum ttu_flags flags = (enum ttu_flags)arg;
+ enum ttu_flags flags = (enum ttu_flags)(long)arg;

/* munlock has nothing to gain from examining un-locked vmas */
if ((flags & TTU_MUNLOCK) && !(vma->vm_flags & VM_LOCKED))
 \ /
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