[PATCH stable v4.4 37/52] powerpc/64: Make meltdown reporting Book3S 64 specific

[Michael Ellerman]

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

commit 406d2b6ae3420f5bb2b3db6986dc6f0b6dbb637b upstream.

In a subsequent patch we will enable building security.c for Book3E.
However the NXP platforms are not vulnerable to Meltdown, so make the
Meltdown vulnerability reporting PPC_BOOK3S_64 specific.

Signed-off-by: Diana Craciun <diana.craciun at nxp.com>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
---
 arch/powerpc/kernel/security.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index b5b7f047fb19..e04afd171b13 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -93,6 +93,7 @@ static __init int barrier_nospec_debugfs_init(void)
 device_initcall(barrier_nospec_debugfs_init);
 #endif /* CONFIG_DEBUG_FS */
 
+#ifdef CONFIG_PPC_BOOK3S_64
 ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	bool thread_priv;
@@ -125,6 +126,7 @@ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, cha
 
 	return sprintf(buf, "Vulnerable\n");
 }
+#endif
 
 ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf)
 {
-- 
2.20.1