This fixes a build break introduced in with the recent round of CPU bug patches.

arch/powerpc/kernel/security.c: In function ‘setup_barrier_nospec’: arch/powerpc/kernel/security.c:59:21: error: implicit declaration of function ‘cpu_mitigations_off’ [-Werror=implicit-function-declaration] if (!no_nospec && !cpu_mitigations_off()) ^~~~~~~~~~~~~~~~~~~

Fixes: 782e69efb3df ("powerpc/speculation: Support 'mitigations=' cmdline option") Signed-off-by: Joel Stanley joel@jms.id.au --- This should be applied to the 4.14 and 4.19 trees. There is no issue with 5.1. The commit message contains a fixes line for the commit in Linus tree. --- arch/powerpc/kernel/security.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c index e9af5d9badf2..68d4ec373cfc 100644 --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -4,6 +4,7 @@ // // Copyright 2018, Michael Ellerman, IBM Corporation.

+#include <linux/cpu.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/seq_buf.h>