Keys: KEYCTL_SESSION_TO_PARENT needs TIF_NOTIFY_RESUME architecture support

As of commit ee18d64c1f632043a02e6f5ba5e045bb26a5465f ("KEYS: Add a keyctl to
install a process's session keyring on its parent [try #6]"), CONFIG_KEYS=y
fails to build on architectures that haven't implemented TIF_NOTIFY_RESUME yet:

security/keys/keyctl.c: In function 'keyctl_session_to_parent':
security/keys/keyctl.c:1312: error: 'TIF_NOTIFY_RESUME' undeclared (first use in this function)
security/keys/keyctl.c:1312: error: (Each undeclared identifier is reported only once
security/keys/keyctl.c:1312: error: for each function it appears in.)

Make KEYCTL_SESSION_TO_PARENT depend on TIF_NOTIFY_RESUME until
m68k, and xtensa have implemented it.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index 5f830bc6f28..e9c2e7c584d 100644
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1236,6 +1236,7 @@ long keyctl_get_security(key_serial_t keyid,
  */
 long keyctl_session_to_parent(void)
 {
+#ifdef TIF_NOTIFY_RESUME
         struct task_struct *me, *parent;
         const struct cred *mycred, *pcred;
         struct cred *cred, *oldcred;
@@ -1326,6 +1327,15 @@ not_permitted:
 error_keyring:
         key_ref_put(keyring_r);
         return ret;
+
+#else /* !TIF_NOTIFY_RESUME */
+        /*
+         * To be removed when TIF_NOTIFY_RESUME has been implemented on
+         * m68k/xtensa
+         */
+#warning TIF_NOTIFY_RESUME not implemented
+        return -EOPNOTSUPP;
+#endif /* !TIF_NOTIFY_RESUME */
 }
 
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