[S390] iucv cr0 enablement bit

Do not set the cr0 enablement bit for iucv by default in head[31|64].S,
move the enablement to iucv_init in the iucv base layer.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 7 insertions, 4 deletions

diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index dd0d1e272be9..f21954b44dc1 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -45,7 +45,7 @@ ENTRY(startup_continue)
                                         # virtual and never return ...
         .align  8
 .Lentry:.long   0x00080000,0x80000000 + _stext
-.Lctl:  .long   0x04b50002              # cr0: various things
+.Lctl:  .long   0x04b50000              # cr0: various things
         .long   0                       # cr1: primary space segment table
         .long   .Lduct                  # cr2: dispatchable unit control table
         .long   0                       # cr3: instruction authorization
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 188602898c17..b6d30135e2ec 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -46,7 +46,7 @@ ENTRY(startup_continue)
         .align  16
 .LPG1:
 .Lentry:.quad   0x0000000180000000,_stext
-.Lctl:  .quad   0x04350002              # cr0: various things
+.Lctl:  .quad   0x04350000              # cr0: various things
         .quad   0                       # cr1: primary space segment table
         .quad   .Lduct                  # cr2: dispatchable unit control table
         .quad   0                       # cr3: instruction authorization
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 7f9124914b13..f2b713847b45 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -1988,12 +1988,13 @@ static int __init iucv_init(void)
                 rc = -EPROTONOSUPPORT;
                 goto out;
         }
+        ctl_set_bit(0, 1);
         rc = iucv_query_maxconn();
         if (rc)
-                goto out;
+                goto out_ctl;
         rc = register_external_interrupt(0x4000, iucv_external_interrupt);
         if (rc)
-                goto out;
+                goto out_ctl;
         iucv_root = root_device_register("iucv");
         if (IS_ERR(iucv_root)) {
                 rc = PTR_ERR(iucv_root);
@@ -2055,6 +2056,8 @@ out_free:
         root_device_unregister(iucv_root);
 out_int:
         unregister_external_interrupt(0x4000, iucv_external_interrupt);
+out_ctl:
+        ctl_clear_bit(0, 1);
 out:
         return rc;
 }