[PATCH v5 2/8] powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.

[Michael Ellerman]

From: Diana Craciun <diana.craciun at nxp.com>

NXP Book3E platforms are not vulnerable to speculative store
bypass, so make the mitigations PPC_BOOK3S_64 specific.

Signed-off-by: Diana Craciun <diana.craciun at nxp.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
---
 arch/powerpc/kernel/security.c | 3 +++
 1 file changed, 3 insertions(+)

v5: No change.

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 79f9397998ed..77f253a6f8c9 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -176,6 +176,7 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
 	return s.len;
 }
 
+#ifdef CONFIG_PPC_BOOK3S_64
 /*
  * Store-forwarding barrier support.
  */
@@ -323,3 +324,5 @@ static __init int stf_barrier_debugfs_init(void)
 }
 device_initcall(stf_barrier_debugfs_init);
 #endif /* CONFIG_DEBUG_FS */
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
-- 
2.14.1