Add an empty arch_pkeys_enabled() in linux/pkeys.h for the
CONFIG_ARCH_HAS_PKEYS=n case.

Split out of a patch by Ram Pai <linux...@us.ibm.com>.

Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
 include/linux/pkeys.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/pkeys.h b/include/linux/pkeys.h
index 946cb773b79f..2955ba976048 100644
--- a/include/linux/pkeys.h
+++ b/include/linux/pkeys.h
@@ -39,6 +39,11 @@ static inline int arch_set_user_pkey_access(struct 
task_struct *tsk, int pkey,
        return 0;
 }
 
+static inline bool arch_pkeys_enabled(void)
+{
+       return false;
+}
+
 static inline void copy_init_pkru_to_fpregs(void)
 {
 }
-- 
2.14.1

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