[PATCH v12 01/28] mm: VM_SHADOW_STACK definition for riscv

Deepak Gupta
2025-03-14T21:39:30Z

VM_HIGH_ARCH_5 is used for riscv

Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
---
include/linux/mm.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b1068ddcbb7..1ef231cbc8fe 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -378,6 +378,13 @@ 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

--
2.34.1