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[PATCH v22 01/28] mm: VM_SHADOW_STACK definition for riscv

From: Deepak Gupta <hidden>
Date: 2025-10-22 23:29:39
Also in: linux-arch, linux-doc, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, rust-for-linux
Subsystem: memory management - core, the rest · Maintainers: Andrew Morton, David Hildenbrand, Linus Torvalds 

VM_HIGH_ARCH_5 is used for riscv

Reviewed-by: Zong Li <redacted>
Reviewed-by: Alexandre Ghiti <redacted>
Acked-by: David Hildenbrand <redacted>
Signed-off-by: Deepak Gupta <redacted>
---
 include/linux/mm.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index d16b33bacc32..2032d3f195f1 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -380,6 +380,13 @@ extern unsigned int kobjsize(const void *objp);
 # define VM_SHADOW_STACK	VM_HIGH_ARCH_6
 #endif
 
+#if defined(CONFIG_RISCV_USER_CFI)
+/*
+ * Following x86 and picking up the same bitpos.
+ */
+# define VM_SHADOW_STACK	VM_HIGH_ARCH_5
+#endif
+
 #ifndef VM_SHADOW_STACK
 # define VM_SHADOW_STACK	VM_NONE
 #endif

-- 
2.43.0
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