17 files changed, 101 insertions, 155 deletions

diff --git a/include/asm-powerpc/iommu.h b/include/asm-powerpc/iommu.h
index 8a8393e50774..d5677cbec200 100644
--- a/include/asm-powerpc/iommu.h
+++ b/include/asm-powerpc/iommu.h
@@ -64,25 +64,6 @@ extern void iommu_free_table(struct device_node *dn);
 
 #endif /* CONFIG_PPC_MULTIPLATFORM */
 
-#ifdef CONFIG_PPC_PSERIES
-
-/* Creates table for an individual device node */
-extern void iommu_devnode_init_pSeries(struct device_node *dn);
-
-#endif /* CONFIG_PPC_PSERIES */
-
-#ifdef CONFIG_PPC_ISERIES
-
-/* Creates table for an individual device node */
-extern void iommu_devnode_init_iSeries(struct device_node *dn);
-/* Get table parameters from HV */
-extern void iommu_table_getparms_iSeries(unsigned long busno,
-                                         unsigned char slotno,
-                                         unsigned char virtbus,
-                                         struct iommu_table* tbl);
-
-#endif /* CONFIG_PPC_ISERIES */
-
 /* Initializes an iommu_table based in values set in the passed-in
  * structure
  */
diff --git a/include/asm-powerpc/iseries/hv_call.h b/include/asm-powerpc/iseries/hv_call.h
index e9f831c9a5e5..162d653ad51f 100644
--- a/include/asm-powerpc/iseries/hv_call.h
+++ b/include/asm-powerpc/iseries/hv_call.h
@@ -1,5 +1,4 @@
 /*
- * HvCall.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
@@ -15,8 +14,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- */
-/*
+ *
  * This file contains the "hypervisor call" interface which is used to
  * drive the hypervisor from the OS.
  */
diff --git a/include/asm-powerpc/iseries/hv_call_event.h b/include/asm-powerpc/iseries/hv_call_event.h
index 46763a30590a..4cec4762076d 100644
--- a/include/asm-powerpc/iseries/hv_call_event.h
+++ b/include/asm-powerpc/iseries/hv_call_event.h
@@ -1,5 +1,4 @@
 /*
- * HvCallEvent.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
@@ -15,8 +14,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- */
-/*
+ *
  * This file contains the "hypervisor call" interface which is used to
  * drive the hypervisor from the OS.
  */
@@ -33,32 +31,9 @@ typedef u8 HvLpEvent_Type;
 typedef u8 HvLpEvent_AckInd;
 typedef u8 HvLpEvent_AckType;
 
-struct  HvCallEvent_PackedParms {
-        u8              xAckType:1;
-        u8              xAckInd:1;
-        u8              xRsvd:1;
-        u8              xTargetLp:5;
-        u8              xType;
-        u16             xSubtype;
-        HvLpInstanceId  xSourceInstId;
-        HvLpInstanceId  xTargetInstId;
-};
-
 typedef u8 HvLpDma_Direction;
 typedef u8 HvLpDma_AddressType;
 
-struct  HvCallEvent_PackedDmaParms {
-        u8              xDirection:1;
-        u8              xLocalAddrType:1;
-        u8              xRemoteAddrType:1;
-        u8              xRsvd1:5;
-        HvLpIndex       xRemoteLp;
-        u8              xType;
-        u8              xRsvd2;
-        HvLpInstanceId  xLocalInstId;
-        HvLpInstanceId  xRemoteInstId;
-};
-
 typedef u64 HvLpEvent_Rc;
 typedef u64 HvLpDma_Rc;
 
@@ -92,11 +67,8 @@ static inline void HvCallEvent_setInterLpQueueIndex(u8 queueIndex)
 static inline void HvCallEvent_setLpEventStack(u8 queueIndex,
                 char *eventStackAddr, u32 eventStackSize)
 {
-        u64 abs_addr;
-
-        abs_addr = virt_to_abs(eventStackAddr);
-        HvCall3(HvCallEventSetLpEventStack, queueIndex, abs_addr,
-                        eventStackSize);
+        HvCall3(HvCallEventSetLpEventStack, queueIndex,
+                        virt_to_abs(eventStackAddr), eventStackSize);
 }
 
 static inline void HvCallEvent_setLpEventQueueInterruptProc(u8 queueIndex,
@@ -108,14 +80,7 @@ static inline void HvCallEvent_setLpEventQueueInterruptProc(u8 queueIndex,
 
 static inline HvLpEvent_Rc HvCallEvent_signalLpEvent(struct HvLpEvent *event)
 {
-        u64 abs_addr;
-
-#ifdef DEBUG_SENDEVENT
-        printk("HvCallEvent_signalLpEvent: *event = %016lx\n ",
-                        (unsigned long)event);
-#endif
-        abs_addr = virt_to_abs(event);
-        return HvCall1(HvCallEventSignalLpEvent, abs_addr);
+        return HvCall1(HvCallEventSignalLpEvent, virt_to_abs(event));
 }
 
 static inline HvLpEvent_Rc HvCallEvent_signalLpEventFast(HvLpIndex targetLp,
@@ -127,17 +92,21 @@ static inline HvLpEvent_Rc HvCallEvent_signalLpEventFast(HvLpIndex targetLp,
 {
         /* Pack the misc bits into a single Dword to pass to PLIC */
         union {
-                struct HvCallEvent_PackedParms  parms;
+                struct {
+                        u8              ack_and_target;
+                        u8              type;
+                        u16             subtype;
+                        HvLpInstanceId  src_inst;
+                        HvLpInstanceId  target_inst;
+                } parms;
                 u64             dword;
         } packed;
-        packed.parms.xAckType   = ackType;
-        packed.parms.xAckInd    = ackInd;
-        packed.parms.xRsvd      = 0;
-        packed.parms.xTargetLp  = targetLp;
-        packed.parms.xType      = type;
-        packed.parms.xSubtype   = subtype;
-        packed.parms.xSourceInstId      = sourceInstanceId;
-        packed.parms.xTargetInstId      = targetInstanceId;
+
+        packed.parms.ack_and_target = (ackType << 7) | (ackInd << 6) | targetLp;
+        packed.parms.type = type;
+        packed.parms.subtype = subtype;
+        packed.parms.src_inst = sourceInstanceId;
+        packed.parms.target_inst = targetInstanceId;
 
         return HvCall7(HvCallEventSignalLpEventParms, packed.dword,
                         correlationToken, eventData1, eventData2,
@@ -146,18 +115,12 @@ static inline HvLpEvent_Rc HvCallEvent_signalLpEventFast(HvLpIndex targetLp,
 
 static inline HvLpEvent_Rc HvCallEvent_ackLpEvent(struct HvLpEvent *event)
 {
-        u64 abs_addr;
-
-        abs_addr = virt_to_abs(event);
-        return HvCall1(HvCallEventAckLpEvent, abs_addr);
+        return HvCall1(HvCallEventAckLpEvent, virt_to_abs(event));
 }
 
 static inline HvLpEvent_Rc HvCallEvent_cancelLpEvent(struct HvLpEvent *event)
 {
-        u64 abs_addr;
-
-        abs_addr = virt_to_abs(event);
-        return HvCall1(HvCallEventCancelLpEvent, abs_addr);
+        return HvCall1(HvCallEventCancelLpEvent, virt_to_abs(event));
 }
 
 static inline HvLpInstanceId HvCallEvent_getSourceLpInstanceId(
@@ -195,59 +158,34 @@ static inline HvLpDma_Rc HvCallEvent_dmaBufList(HvLpEvent_Type type,
 {
         /* Pack the misc bits into a single Dword to pass to PLIC */
         union {
-                struct HvCallEvent_PackedDmaParms       parms;
+                struct {
+                        u8              flags;
+                        HvLpIndex       remote;
+                        u8              type;
+                        u8              reserved;
+                        HvLpInstanceId  local_inst;
+                        HvLpInstanceId  remote_inst;
+                } parms;
                 u64             dword;
         } packed;
 
-        packed.parms.xDirection         = direction;
-        packed.parms.xLocalAddrType     = localAddressType;
-        packed.parms.xRemoteAddrType    = remoteAddressType;
-        packed.parms.xRsvd1             = 0;
-        packed.parms.xRemoteLp          = remoteLp;
-        packed.parms.xType              = type;
-        packed.parms.xRsvd2             = 0;
-        packed.parms.xLocalInstId       = localInstanceId;
-        packed.parms.xRemoteInstId      = remoteInstanceId;
+        packed.parms.flags = (direction << 7) |
+                (localAddressType << 6) | (remoteAddressType << 5);
+        packed.parms.remote = remoteLp;
+        packed.parms.type = type;
+        packed.parms.reserved = 0;
+        packed.parms.local_inst = localInstanceId;
+        packed.parms.remote_inst = remoteInstanceId;
 
         return HvCall4(HvCallEventDmaBufList, packed.dword, localBufList,
                         remoteBufList, transferLength);
 }
 
-static inline HvLpDma_Rc HvCallEvent_dmaSingle(HvLpEvent_Type type,
-                HvLpIndex remoteLp, HvLpDma_Direction direction,
-                HvLpInstanceId localInstanceId,
-                HvLpInstanceId remoteInstanceId,
-                HvLpDma_AddressType localAddressType,
-                HvLpDma_AddressType remoteAddressType,
-                u64 localAddrOrTce, u64 remoteAddrOrTce, u32 transferLength)
-{
-        /* Pack the misc bits into a single Dword to pass to PLIC */
-        union {
-                struct HvCallEvent_PackedDmaParms       parms;
-                u64             dword;
-        } packed;
-
-        packed.parms.xDirection         = direction;
-        packed.parms.xLocalAddrType     = localAddressType;
-        packed.parms.xRemoteAddrType    = remoteAddressType;
-        packed.parms.xRsvd1             = 0;
-        packed.parms.xRemoteLp          = remoteLp;
-        packed.parms.xType              = type;
-        packed.parms.xRsvd2             = 0;
-        packed.parms.xLocalInstId       = localInstanceId;
-        packed.parms.xRemoteInstId      = remoteInstanceId;
-
-        return (HvLpDma_Rc)HvCall4(HvCallEventDmaSingle, packed.dword,
-                        localAddrOrTce, remoteAddrOrTce, transferLength);
-}
-
 static inline HvLpDma_Rc HvCallEvent_dmaToSp(void *local, u32 remote,
                 u32 length, HvLpDma_Direction dir)
 {
-        u64 abs_addr;
-
-        abs_addr = virt_to_abs(local);
-        return HvCall4(HvCallEventDmaToSp, abs_addr, remote, length, dir);
+        return HvCall4(HvCallEventDmaToSp, virt_to_abs(local), remote,
+                        length, dir);
 }
 
 #endif /* _ASM_POWERPC_ISERIES_HV_CALL_EVENT_H */
diff --git a/include/asm-powerpc/iseries/hv_call_sc.h b/include/asm-powerpc/iseries/hv_call_sc.h
index dec7e9d9ab78..f5d210959250 100644
--- a/include/asm-powerpc/iseries/hv_call_sc.h
+++ b/include/asm-powerpc/iseries/hv_call_sc.h
@@ -1,5 +1,4 @@
 /*
- * HvCallSc.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/hv_lp_config.h b/include/asm-powerpc/iseries/hv_lp_config.h
index bc00f036bca0..df8b20739719 100644
--- a/include/asm-powerpc/iseries/hv_lp_config.h
+++ b/include/asm-powerpc/iseries/hv_lp_config.h
@@ -1,5 +1,4 @@
 /*
- * HvLpConfig.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/hv_lp_event.h b/include/asm-powerpc/iseries/hv_lp_event.h
index 499ab1ad0185..4065a4de4935 100644
--- a/include/asm-powerpc/iseries/hv_lp_event.h
+++ b/include/asm-powerpc/iseries/hv_lp_event.h
@@ -1,5 +1,4 @@
 /*
- * HvLpEvent.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
@@ -32,17 +31,8 @@
  * partitions through PLIC.
  */
 
-struct HvEventFlags {
-        u8      xValid:1;       /* Indicates a valid request    x00-x00 */
-        u8      xRsvd1:4;       /* Reserved                     ... */
-        u8      xAckType:1;     /* Immediate or deferred        ... */
-        u8      xAckInd:1;      /* Indicates if ACK required    ... */
-        u8      xFunction:1;    /* Interrupt or Acknowledge     ... */
-};
-
-
 struct HvLpEvent {
-        struct HvEventFlags xFlags;     /* Event flags                x00-x00 */
+        u8      flags;                  /* Event flags                x00-x00 */
         u8      xType;                  /* Type of message            x01-x01 */
         u16     xSubtype;               /* Subtype for event          x02-x03 */
         u8      xSourceLp;              /* Source LP                  x04-x04 */
@@ -126,6 +116,11 @@ extern int HvLpEvent_closePath(HvLpEvent_Type eventType, HvLpIndex lpIndex);
 #define HvLpEvent_AckType_ImmediateAck 0
 #define HvLpEvent_AckType_DeferredAck 1
 
+#define HV_LP_EVENT_INT                 0x01
+#define HV_LP_EVENT_DO_ACK              0x02
+#define HV_LP_EVENT_DEFERRED_ACK        0x04
+#define HV_LP_EVENT_VALID               0x80
+
 #define HvLpDma_Direction_LocalToRemote 0
 #define HvLpDma_Direction_RemoteToLocal 1
 
@@ -139,4 +134,29 @@ extern int HvLpEvent_closePath(HvLpEvent_Type eventType, HvLpIndex lpIndex);
 #define HvLpDma_Rc_InvalidAddress 4
 #define HvLpDma_Rc_InvalidLength 5
 
+static inline int hvlpevent_is_valid(struct HvLpEvent *h)
+{
+        return h->flags & HV_LP_EVENT_VALID;
+}
+
+static inline void hvlpevent_invalidate(struct HvLpEvent *h)
+{
+        h->flags &= ~ HV_LP_EVENT_VALID;
+}
+
+static inline int hvlpevent_is_int(struct HvLpEvent *h)
+{
+        return h->flags & HV_LP_EVENT_INT;
+}
+
+static inline int hvlpevent_is_ack(struct HvLpEvent *h)
+{
+        return !hvlpevent_is_int(h);
+}
+
+static inline int hvlpevent_need_ack(struct HvLpEvent *h)
+{
+        return h->flags & HV_LP_EVENT_DO_ACK;
+}
+
 #endif /* _ASM_POWERPC_ISERIES_HV_LP_EVENT_H */
diff --git a/include/asm-powerpc/iseries/hv_types.h b/include/asm-powerpc/iseries/hv_types.h
index c38f7e3d01dc..c3e6d2a1d1c3 100644
--- a/include/asm-powerpc/iseries/hv_types.h
+++ b/include/asm-powerpc/iseries/hv_types.h
@@ -1,5 +1,4 @@
 /*
- * HvTypes.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/iseries_io.h b/include/asm-powerpc/iseries/iseries_io.h
index 56b2113ff0f5..496aa852b617 100644
--- a/include/asm-powerpc/iseries/iseries_io.h
+++ b/include/asm-powerpc/iseries/iseries_io.h
@@ -6,7 +6,7 @@
 #ifdef CONFIG_PPC_ISERIES
 #include <linux/types.h>
 /*
- * File iSeries_io.h created by Allan Trautman on Thu Dec 28 2000.
+ * Created by Allan Trautman on Thu Dec 28 2000.
  *
  * Remaps the io.h for the iSeries Io
  * Copyright (C) 2000  Allan H Trautman, IBM Corporation
@@ -32,6 +32,7 @@
  * End Change Activity
  */
 
+#ifdef CONFIG_PCI
 extern u8   iSeries_Read_Byte(const volatile void __iomem * IoAddress);
 extern u16  iSeries_Read_Word(const volatile void __iomem * IoAddress);
 extern u32  iSeries_Read_Long(const volatile void __iomem * IoAddress);
@@ -44,6 +45,17 @@ extern void iSeries_memcpy_toio(volatile void __iomem *dest, void *source,
                 size_t n);
 extern void iSeries_memcpy_fromio(void *dest,
                 const volatile void __iomem *source, size_t n);
+#else
+static inline u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
+{
+        return 0xff;
+}
+
+static inline void iSeries_Write_Byte(u8 IoData,
+                volatile void __iomem *IoAddress)
+{
+}
+#endif  /* CONFIG_PCI */
 
 #endif /* CONFIG_PPC_ISERIES */
 #endif /* _ASM_POWERPC_ISERIES_ISERIES_IO_H */
diff --git a/include/asm-powerpc/iseries/it_exp_vpd_panel.h b/include/asm-powerpc/iseries/it_exp_vpd_panel.h
index 66a17a230c52..304a609ae21a 100644
--- a/include/asm-powerpc/iseries/it_exp_vpd_panel.h
+++ b/include/asm-powerpc/iseries/it_exp_vpd_panel.h
@@ -1,5 +1,4 @@
 /*
- * ItExtVpdPanel.h
  * Copyright (C) 2002  Dave Boutcher IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/it_lp_naca.h b/include/asm-powerpc/iseries/it_lp_naca.h
index c3ef1de45d82..4fdcf052927f 100644
--- a/include/asm-powerpc/iseries/it_lp_naca.h
+++ b/include/asm-powerpc/iseries/it_lp_naca.h
@@ -1,5 +1,4 @@
 /*
- * ItLpNaca.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
@@ -37,17 +36,13 @@ struct ItLpNaca {
         u8      xLpIndex;               // LP Index                     x0B-x0B
         u16     xMaxLpQueues;           // Number of allocated queues   x0C-x0D
         u16     xLpQueueOffset;         // Offset to start of LP queues x0E-x0F
-        u8      xPirEnvironMode:8;      // Piranha or hardware          x10-x10
-        u8      xPirConsoleMode:8;      // Piranha console indicator    x11-x11
-        u8      xPirDasdMode:8;         // Piranha dasd indicator       x12-x12
+        u8      xPirEnvironMode;        // Piranha or hardware          x10-x10
+        u8      xPirConsoleMode;        // Piranha console indicator    x11-x11
+        u8      xPirDasdMode;           // Piranha dasd indicator       x12-x12
         u8      xRsvd1_0[5];            // Reserved for Piranha related x13-x17
-        u8      xLparInstalled:1;       // Is LPAR installed on system  x18-x1F
-        u8      xSysPartitioned:1;      // Is the system partitioned    ...
-        u8      xHwSyncedTBs:1;         // Hardware synced TBs          ...
-        u8      xIntProcUtilHmt:1;      // Utilize HMT for interrupts   ...
-        u8      xRsvd1_1:4;             // Reserved                     ...
-        u8      xSpVpdFormat:8;         // VPD areas are in CSP format  ...
-        u8      xIntProcRatio:8;        // Ratio of int procs to procs  ...
+        u8      flags;                  // flags, see below             x18-x1F
+        u8      xSpVpdFormat;           // VPD areas are in CSP format  ...
+        u8      xIntProcRatio;          // Ratio of int procs to procs  ...
         u8      xRsvd1_2[5];            // Reserved                     ...
         u16     xRsvd1_3;               // Reserved                     x20-x21
         u16     xPlicVrmIndex;          // VRM index of PLIC            x22-x23
@@ -77,4 +72,9 @@ struct ItLpNaca {
 
 extern struct ItLpNaca          itLpNaca;
 
+#define ITLPNACA_LPAR           0x80    /* Is LPAR installed on the system */
+#define ITLPNACA_PARTITIONED    0x40    /* Is the system partitioned */
+#define ITLPNACA_HWSYNCEDTBS    0x20    /* Hardware synced TBs */
+#define ITLPNACA_HMTINT         0x10    /* Utilize MHT for interrupts */
+
 #endif /* _ASM_POWERPC_ISERIES_IT_LP_NACA_H */
diff --git a/include/asm-powerpc/iseries/it_lp_queue.h b/include/asm-powerpc/iseries/it_lp_queue.h
index a60d03afbf95..b7c6fc12cce2 100644
--- a/include/asm-powerpc/iseries/it_lp_queue.h
+++ b/include/asm-powerpc/iseries/it_lp_queue.h
@@ -1,5 +1,4 @@
 /*
- * ItLpQueue.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/it_lp_reg_save.h b/include/asm-powerpc/iseries/it_lp_reg_save.h
index 81824e1bb767..5403b756f654 100644
--- a/include/asm-powerpc/iseries/it_lp_reg_save.h
+++ b/include/asm-powerpc/iseries/it_lp_reg_save.h
@@ -1,5 +1,4 @@
 /*
- * ItLpRegSave.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
@@ -83,4 +82,4 @@ struct ItLpRegSave {
 
 extern struct ItLpRegSave iseries_reg_save[];
 
-#endif /* _ITLPREGSAVE_H */
+#endif /* _ASM_POWERPC_ISERIES_IT_LP_REG_SAVE_H */
diff --git a/include/asm-powerpc/iseries/lpar_map.h b/include/asm-powerpc/iseries/lpar_map.h
index 84fc321615bf..2ec384d66abb 100644
--- a/include/asm-powerpc/iseries/lpar_map.h
+++ b/include/asm-powerpc/iseries/lpar_map.h
@@ -1,5 +1,4 @@
 /*
- * LparMap.h
  * Copyright (C) 2001  Mike Corrigan IBM Corporation
  *
  * This program is free software; you can redistribute it and/or modify
diff --git a/include/asm-powerpc/iseries/mf.h b/include/asm-powerpc/iseries/mf.h
index e7bd57a03fb1..857e5202fc78 100644
--- a/include/asm-powerpc/iseries/mf.h
+++ b/include/asm-powerpc/iseries/mf.h
@@ -1,5 +1,4 @@
 /*
- * mf.h
  * Copyright (C) 2001  Troy D. Armstrong IBM Corporation
  * Copyright (C) 2004  Stephen Rothwell IBM Corporation
  *
diff --git a/include/asm-powerpc/iseries/vio.h b/include/asm-powerpc/iseries/vio.h
index 7e3a469420dd..72a97d37aac3 100644
--- a/include/asm-powerpc/iseries/vio.h
+++ b/include/asm-powerpc/iseries/vio.h
@@ -1,5 +1,4 @@
 /* -*- linux-c -*-
- *  drivers/char/vio.h
  *
  *  iSeries Virtual I/O Message Path header
  *
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
index b0d816fe2e27..38de92d41a14 100644
--- a/include/asm-powerpc/pci-bridge.h
+++ b/include/asm-powerpc/pci-bridge.h
@@ -142,8 +142,6 @@ void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
 
 extern int pcibios_remove_root_bus(struct pci_controller *phb);
 
-extern void phbs_remap_io(void);
-
 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
 {
         struct device_node *busdn = bus->sysdata;
diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h
index 1be629b4fb97..9b822afa7d0e 100644
--- a/include/asm-powerpc/system.h
+++ b/include/asm-powerpc/system.h
@@ -133,6 +133,14 @@ extern int fix_alignment(struct pt_regs *);
 extern void cvt_fd(float *from, double *to, struct thread_struct *thread);
 extern void cvt_df(double *from, float *to, struct thread_struct *thread);
 
+#ifndef CONFIG_SMP
+extern void discard_lazy_cpu_state(void);
+#else
+static inline void discard_lazy_cpu_state(void)
+{
+}
+#endif
+
 #ifdef CONFIG_ALTIVEC
 extern void flush_altivec_to_thread(struct task_struct *);
 #else