# \[PATCH 11/22\] um: mm: use mm\_is\_kernel() in TLB sync

- From: Kevin Brodsky \<hidden\>
- Date: 2026-07-14 14:06:35 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2026/07/17257827
- Thread: https://ratatoskr.run/linux-mm/2026/07/17257816/t.md

```text
The new MMF_KERNEL flag identifies kernel-owned mm's. Checking the
flag with mm_is_kernel() is preferred over comparing directly
against &init_mm.

No functional change, as only init_mm has MMF_KERNEL set for now.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Kevin Brodsky <redacted>
---
 arch/um/kernel/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 1f175716b474..fa34a710203e 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -171,7 +171,7 @@ int um_tlb_sync(struct mm_struct *mm)
 		return 0;
 
 	ops.mm_idp = &mm->context.id;
-	if (mm == &init_mm) {
+	if (mm_is_kernel(mm)) {
 		ops.mmap = kern_map;
 		ops.unmap = kern_unmap;
 	} else {

-- 
2.51.2


```