ppc64 iSeries: use device_node instead of iSeries_Device_node

There needs to be more cleanup after this.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/arch/powerpc/platforms/iseries/iommu.c b/arch/powerpc/platforms/iseries/iommu.c
index 65c76dd1d3de950a1989705e89d96bae49945cc9..9ac735d5b817d5533ac45de1506854d2f53acfeb 100644 (file)
--- a/arch/powerpc/platforms/iseries/iommu.c
+++ b/arch/powerpc/platforms/iseries/iommu.c
@@ -89,15 +89,17 @@ static void tce_free_iSeries(struct iommu_table *tbl, long index, long npages)
  */
 static struct iommu_table *iommu_table_find(struct iommu_table * tbl)
 {
-       struct iSeries_Device_Node *dp;
+       struct device_node *dp;
 
        list_for_each_entry(dp, &iSeries_Global_Device_List, Device_List) {
-               if ((dp->iommu_table != NULL) &&
-                   (dp->iommu_table->it_type == TCE_PCI) &&
-                   (dp->iommu_table->it_offset == tbl->it_offset) &&
-                   (dp->iommu_table->it_index == tbl->it_index) &&
-                   (dp->iommu_table->it_size == tbl->it_size))
-                       return dp->iommu_table;
+               struct iommu_table *it = PCI_DN(dp)->iommu_table;
+
+               if ((it != NULL) &&
+                   (it->it_type == TCE_PCI) &&
+                   (it->it_offset == tbl->it_offset) &&
+                   (it->it_index == tbl->it_index) &&
+                   (it->it_size == tbl->it_size))
+                       return it;
        }
        return NULL;
 }
@@ -111,7 +113,7 @@ static struct iommu_table *iommu_table_find(struct iommu_table * tbl)
  * 2. TCE table per Bus.
  * 3. TCE Table per IOA.
  */
-static void iommu_table_getparms(struct iSeries_Device_Node* dn,
+static void iommu_table_getparms(struct device_node *dn,
                                 struct iommu_table* tbl)
 {
        struct iommu_table_cb *parms;
@@ -123,7 +125,7 @@ static void iommu_table_getparms(struct iSeries_Device_Node* dn,
        memset(parms, 0, sizeof(*parms));
 
        parms->itc_busno = ISERIES_BUS(dn);
-       parms->itc_slotno = dn->LogicalSlot;
+       parms->itc_slotno = PCI_DN(dn)->LogicalSlot;
        parms->itc_virtbus = 0;
 
        HvCallXm_getTceTableParms(ISERIES_HV_ADDR(parms));
@@ -143,18 +145,19 @@ static void iommu_table_getparms(struct iSeries_Device_Node* dn,
 }
 
 
-void iommu_devnode_init_iSeries(struct iSeries_Device_Node *dn)
+void iommu_devnode_init_iSeries(struct device_node *dn)
 {
        struct iommu_table *tbl;
+       struct pci_dn *pdn = PCI_DN(dn);
 
        tbl = kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
 
        iommu_table_getparms(dn, tbl);
 
        /* Look for existing tce table */
-       dn->iommu_table = iommu_table_find(tbl);
-       if (dn->iommu_table == NULL)
-               dn->iommu_table = iommu_init_table(tbl);
+       pdn->iommu_table = iommu_table_find(tbl);
+       if (pdn->iommu_table == NULL)
+               pdn->iommu_table = iommu_init_table(tbl);
        else
                kfree(tbl);
 }

diff --git a/arch/powerpc/platforms/iseries/pci.c b/arch/powerpc/platforms/iseries/pci.c
index 61a857218bc8a6c0dca5b62c5334059d617af33d..501b1dcbfac51b589acf3b554f467fd4b7b6a4b2 100644 (file)
--- a/arch/powerpc/platforms/iseries/pci.c
+++ b/arch/powerpc/platforms/iseries/pci.c
@@ -48,7 +48,7 @@ extern unsigned long io_page_mask;
 /*
  * Forward declares of prototypes.
  */
-static struct iSeries_Device_Node *find_Device_Node(int bus, int devfn);
+static struct device_node *find_Device_Node(int bus, int devfn);
 static void scan_PHB_slots(struct pci_controller *Phb);
 static void scan_EADS_bridge(HvBusNumber Bus, HvSubBusNumber SubBus, int IdSel);
 static int scan_bridge_slot(HvBusNumber Bus, struct HvCallPci_BridgeInfo *Info);
@@ -85,7 +85,7 @@ static long current_iomm_table_entry;
 /*
  * Lookup Tables.
  */
-static struct iSeries_Device_Node **iomm_table;
+static struct device_node **iomm_table;
 static u8 *iobar_table;
 
 /*
@@ -199,29 +199,35 @@ static void pci_Log_Error(char *Error_Text, int Bus, int SubBus,
 /*
  * build_device_node(u16 Bus, int SubBus, u8 DevFn)
  */
-static struct iSeries_Device_Node *build_device_node(HvBusNumber Bus,
+static struct device_node *build_device_node(HvBusNumber Bus,
                HvSubBusNumber SubBus, int AgentId, int Function)
 {
-       struct iSeries_Device_Node *node;
+       struct device_node *node;
+       struct pci_dn *pdn;
 
        PPCDBG(PPCDBG_BUSWALK,
                        "-build_device_node 0x%02X.%02X.%02X Function: %02X\n",
                        Bus, SubBus, AgentId, Function);
 
-       node = kmalloc(sizeof(struct iSeries_Device_Node), GFP_KERNEL);
+       node = kmalloc(sizeof(struct device_node), GFP_KERNEL);
        if (node == NULL)
                return NULL;
-
-       memset(node, 0, sizeof(struct iSeries_Device_Node));
+       memset(node, 0, sizeof(struct device_node));
+       pdn = kzalloc(sizeof(*pdn), GFP_KERNEL);
+       if (pdn == NULL) {
+               kfree(node);
+               return NULL;
+       }
+       node->data = pdn;
        list_add_tail(&node->Device_List, &iSeries_Global_Device_List);
 #if 0
-       node->DsaAddr = ((u64)Bus << 48) + ((u64)SubBus << 40) + ((u64)0x10 << 32);
+       pdn->DsaAddr = ((u64)Bus << 48) + ((u64)SubBus << 40) + ((u64)0x10 << 32);
 #endif
-       node->DsaAddr.DsaAddr = 0;
-       node->DsaAddr.Dsa.busNumber = Bus;
-       node->DsaAddr.Dsa.subBusNumber = SubBus;
-       node->DsaAddr.Dsa.deviceId = 0x10;
-       node->DevFn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
+       pdn->DsaAddr.DsaAddr = 0;
+       pdn->DsaAddr.Dsa.busNumber = Bus;
+       pdn->DsaAddr.Dsa.subBusNumber = SubBus;
+       pdn->DsaAddr.Dsa.deviceId = 0x10;
+       pdn->devfn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
        return node;
 }
 
@@ -294,7 +300,7 @@ void iSeries_pcibios_init(void)
 void __init iSeries_pci_final_fixup(void)
 {
        struct pci_dev *pdev = NULL;
-       struct iSeries_Device_Node *node;
+       struct device_node *node;
        int DeviceCount = 0;
 
        PPCDBG(PPCDBG_BUSWALK, "iSeries_pcibios_fixup Entry.\n");
@@ -311,7 +317,7 @@ void __init iSeries_pci_final_fixup(void)
                if (node != NULL) {
                        ++DeviceCount;
                        pdev->sysdata = (void *)node;
-                       node->PciDev = pdev;
+                       PCI_DN(node)->pcidev = pdev;
                        PPCDBG(PPCDBG_BUSWALK,
                                        "pdev 0x%p <==> DevNode 0x%p\n",
                                        pdev, node);
@@ -321,7 +327,7 @@ void __init iSeries_pci_final_fixup(void)
                } else
                        printk("PCI: Device Tree not found for 0x%016lX\n",
                                        (unsigned long)pdev);
-               pdev->irq = node->Irq;
+               pdev->irq = PCI_DN(node)->Irq;
        }
        iSeries_activate_IRQs();
        mf_display_src(0xC9000200);
@@ -439,7 +445,7 @@ static void scan_EADS_bridge(HvBusNumber bus, HvSubBusNumber SubBus,
 static int scan_bridge_slot(HvBusNumber Bus,
                struct HvCallPci_BridgeInfo *BridgeInfo)
 {
-       struct iSeries_Device_Node *node;
+       struct device_node *node;
        HvSubBusNumber SubBus = BridgeInfo->subBusNumber;
        u16 VendorId = 0;
        int HvRc = 0;
@@ -489,8 +495,8 @@ static int scan_bridge_slot(HvBusNumber Bus,
 
                        ++DeviceCount;
                        node = build_device_node(Bus, SubBus, EADsIdSel, Function);
-                       node->Irq = Irq;
-                       node->LogicalSlot = BridgeInfo->logicalSlotNumber;
+                       PCI_DN(node)->Irq = Irq;
+                       PCI_DN(node)->LogicalSlot = BridgeInfo->logicalSlotNumber;
 
                } /* for (Function = 0; Function < 8; ++Function) */
        } /* for (IdSel = 1; IdSel <= MaxAgents; ++IdSel) */
@@ -540,15 +546,16 @@ EXPORT_SYMBOL(iSeries_memcpy_fromio);
 /*
  * Look down the chain to find the matching Device Device
  */
-static struct iSeries_Device_Node *find_Device_Node(int bus, int devfn)
+static struct device_node *find_Device_Node(int bus, int devfn)
 {
        struct list_head *pos;
 
        list_for_each(pos, &iSeries_Global_Device_List) {
-               struct iSeries_Device_Node *node =
-                       list_entry(pos, struct iSeries_Device_Node, Device_List);
+               struct device_node *node =
+                       list_entry(pos, struct device_node, Device_List);
 
-               if ((bus == ISERIES_BUS(node)) && (devfn == node->DevFn))
+               if ((bus == ISERIES_BUS(node)) &&
+                               (devfn == PCI_DN(node)->devfn))
                        return node;
        }
        return NULL;
@@ -560,12 +567,12 @@ static struct iSeries_Device_Node *find_Device_Node(int bus, int devfn)
  * Sanity Check Node PciDev to passed pci_dev
  * If none is found, returns a NULL which the client must handle.
  */
-static struct iSeries_Device_Node *get_Device_Node(struct pci_dev *pdev)
+static struct device_node *get_Device_Node(struct pci_dev *pdev)
 {
-       struct iSeries_Device_Node *node;
+       struct device_node *node;
 
        node = pdev->sysdata;
-       if (node == NULL || node->PciDev != pdev)
+       if (node == NULL || PCI_DN(node)->pcidev != pdev)
                node = find_Device_Node(pdev->bus->number, pdev->devfn);
        return node;
 }
@@ -593,7 +600,7 @@ static u64 hv_cfg_write_func[4] = {
 static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
                int offset, int size, u32 *val)
 {
-       struct iSeries_Device_Node *node = find_Device_Node(bus->number, devfn);
+       struct device_node *node = find_Device_Node(bus->number, devfn);
        u64 fn;
        struct HvCallPci_LoadReturn ret;
 
@@ -605,7 +612,7 @@ static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
        }
 
        fn = hv_cfg_read_func[(size - 1) & 3];
-       HvCall3Ret16(fn, &ret, node->DsaAddr.DsaAddr, offset, 0);
+       HvCall3Ret16(fn, &ret, PCI_DN(node)->DsaAddr.DsaAddr, offset, 0);
 
        if (ret.rc != 0) {
                *val = ~0;
@@ -623,7 +630,7 @@ static int iSeries_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
                int offset, int size, u32 val)
 {
-       struct iSeries_Device_Node *node = find_Device_Node(bus->number, devfn);
+       struct device_node *node = find_Device_Node(bus->number, devfn);
        u64 fn;
        u64 ret;
 
@@ -633,7 +640,7 @@ static int iSeries_pci_write_config(struct pci_bus *bus, unsigned int devfn,
                return PCIBIOS_BAD_REGISTER_NUMBER;
 
        fn = hv_cfg_write_func[(size - 1) & 3];
-       ret = HvCall4(fn, node->DsaAddr.DsaAddr, offset, val, 0);
+       ret = HvCall4(fn, PCI_DN(node)->DsaAddr.DsaAddr, offset, val, 0);
 
        if (ret != 0)
                return PCIBIOS_DEVICE_NOT_FOUND;
@@ -655,14 +662,16 @@ static struct pci_ops iSeries_pci_ops = {
  * PCI: Device 23.90 ReadL Retry( 1)
  * PCI: Device 23.90 ReadL Retry Successful(1)
  */
-static int CheckReturnCode(char *TextHdr, struct iSeries_Device_Node *DevNode,
+static int CheckReturnCode(char *TextHdr, struct device_node *DevNode,
                int *retry, u64 ret)
 {
        if (ret != 0)  {
+               struct pci_dn *pdn = PCI_DN(DevNode);
+
                ++Pci_Error_Count;
                (*retry)++;
                printk("PCI: %s: Device 0x%04X:%02X  I/O Error(%2d): 0x%04X\n",
-                               TextHdr, DevNode->DsaAddr.Dsa.busNumber, DevNode->DevFn,
+                               TextHdr, pdn->DsaAddr.Dsa.busNumber, pdn->devfn,
                                *retry, (int)ret);
                /*
                 * Bump the retry and check for retry count exceeded.
@@ -685,14 +694,14 @@ static int CheckReturnCode(char *TextHdr, struct iSeries_Device_Node *DevNode,
  * Note: Make sure the passed variable end up on the stack to avoid
  * the exposure of being device global.
  */
-static inline struct iSeries_Device_Node *xlate_iomm_address(
+static inline struct device_node *xlate_iomm_address(
                const volatile void __iomem *IoAddress,
                u64 *dsaptr, u64 *BarOffsetPtr)
 {
        unsigned long OrigIoAddr;
        unsigned long BaseIoAddr;
        unsigned long TableIndex;
-       struct iSeries_Device_Node *DevNode;
+       struct device_node *DevNode;
 
        OrigIoAddr = (unsigned long __force)IoAddress;
        if ((OrigIoAddr < BASE_IO_MEMORY) || (OrigIoAddr >= max_io_memory))
@@ -703,7 +712,7 @@ static inline struct iSeries_Device_Node *xlate_iomm_address(
 
        if (DevNode != NULL) {
                int barnum = iobar_table[TableIndex];
-               *dsaptr = DevNode->DsaAddr.DsaAddr | (barnum << 24);
+               *dsaptr = PCI_DN(DevNode)->DsaAddr.DsaAddr | (barnum << 24);
                *BarOffsetPtr = BaseIoAddr % IOMM_TABLE_ENTRY_SIZE;
        } else
                panic("PCI: Invalid PCI IoAddress detected!\n");
@@ -725,7 +734,7 @@ u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        struct HvCallPci_LoadReturn ret;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {
@@ -755,7 +764,7 @@ u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        struct HvCallPci_LoadReturn ret;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {
@@ -786,7 +795,7 @@ u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        struct HvCallPci_LoadReturn ret;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {
@@ -824,7 +833,7 @@ void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        u64 rc;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {
@@ -852,7 +861,7 @@ void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        u64 rc;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {
@@ -880,7 +889,7 @@ void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
        u64 dsa;
        int retry = 0;
        u64 rc;
-       struct iSeries_Device_Node *DevNode =
+       struct device_node *DevNode =
                xlate_iomm_address(IoAddress, &dsa, &BarOffset);
 
        if (DevNode == NULL) {

diff --git a/arch/powerpc/platforms/iseries/vpdinfo.c b/arch/powerpc/platforms/iseries/vpdinfo.c
index 8b62f3bf1d268517a37f1876bbe3e0abe93db940..d8a6796924e26c6f79ebbe9b0e4d9d6e5afa0c1b 100644 (file)
--- a/arch/powerpc/platforms/iseries/vpdinfo.c
+++ b/arch/powerpc/platforms/iseries/vpdinfo.c
@@ -240,7 +240,7 @@ out_free:
  */
 void __init iSeries_Device_Information(struct pci_dev *PciDev, int count)
 {
-       struct iSeries_Device_Node *DevNode = PciDev->sysdata;
+       struct device_node *DevNode = PciDev->sysdata;
        u16 bus;
        u8 frame;
        char card[4];

diff --git a/arch/ppc64/kernel/pci_iommu.c b/arch/ppc64/kernel/pci_iommu.c
index 19362ea115725dbf6eaeb636e5d71d458756585a..6c9dc67f59d821b3338c28f26a3f95b956a2e8f1 100644 (file)
--- a/arch/ppc64/kernel/pci_iommu.c
+++ b/arch/ppc64/kernel/pci_iommu.c
@@ -61,13 +61,7 @@ static inline struct iommu_table *devnode_table(struct device *dev)
        } else
                pdev = to_pci_dev(dev);
 
-#ifdef CONFIG_PPC_ISERIES
-       return ISERIES_DEVNODE(pdev)->iommu_table;
-#endif /* CONFIG_PPC_ISERIES */
-
-#ifdef CONFIG_PPC_MULTIPLATFORM
        return PCI_DN(PCI_GET_DN(pdev))->iommu_table;
-#endif /* CONFIG_PPC_MULTIPLATFORM */
 }
 
 

diff --git a/include/asm-ppc64/iSeries/iSeries_pci.h b/include/asm-ppc64/iSeries/iSeries_pci.h
index 575f611f8b3391b04ec461adf70c65dbe207e812..a4d88b49fd9f04e51614e5fa2e897a7506a79267 100644 (file)
--- a/include/asm-ppc64/iSeries/iSeries_pci.h
+++ b/include/asm-ppc64/iSeries/iSeries_pci.h
@@ -30,21 +30,19 @@
  * End Change Activity
  */
 
-#include <asm/iSeries/HvCallPci.h>
 #include <asm/abs_addr.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
 
 struct pci_dev;                                /* For Forward Reference */
-struct iSeries_Device_Node;
 
 /*
- * Gets iSeries Bus, SubBus, DevFn using iSeries_Device_Node structure
+ * Gets iSeries Bus, SubBus, DevFn using device_node structure
  */
 
-#define ISERIES_BUS(DevPtr)    DevPtr->DsaAddr.Dsa.busNumber
-#define ISERIES_SUBBUS(DevPtr) DevPtr->DsaAddr.Dsa.subBusNumber
-#define ISERIES_DEVICE(DevPtr) DevPtr->DsaAddr.Dsa.deviceId
-#define ISERIES_DSA(DevPtr)    DevPtr->DsaAddr.DsaAddr
-#define ISERIES_DEVNODE(PciDev)        ((struct iSeries_Device_Node *)PciDev->sysdata)
+#define ISERIES_BUS(DevPtr)    PCI_DN(DevPtr)->DsaAddr.Dsa.busNumber
+#define ISERIES_SUBBUS(DevPtr) PCI_DN(DevPtr)->DsaAddr.Dsa.subBusNumber
+#define ISERIES_DEVNODE(PciDev)        ((struct device_node *)PciDev->sysdata)
 
 #define EADsMaxAgents 7
 
@@ -67,22 +65,6 @@ struct iSeries_Device_Node;
 #define ISERIES_HV_ADDR(virtaddr)      \
        (0x8000000000000000 | virt_to_abs(virtaddr))
 
-/*
- * iSeries Device Information
- */
-struct iSeries_Device_Node {
-       struct list_head Device_List;
-       struct pci_dev  *PciDev;
-       union HvDsaMap  DsaAddr;        /* Direct Select Address */
-                                       /* busNumber, subBusNumber, */
-                                       /* deviceId, barNumber */
-       int             DevFn;          /* Linux devfn */
-       int             Irq;            /* Assigned IRQ */
-       int             Flags;          /* Possible flags(disable/bist)*/
-       u8              LogicalSlot;    /* Hv Slot Index for Tces */
-       struct iommu_table *iommu_table;/* Device TCE Table */
-};
-
 extern void    iSeries_Device_Information(struct pci_dev*, int);
 
 #endif /* _ISERIES_64_PCI_H */

diff --git a/include/asm-ppc64/iommu.h b/include/asm-ppc64/iommu.h
index a6a173d49506092c3f87c59853a1b74d71283c4b..d096faf4191e3b12fdabae710ae26e659dafccc1 100644 (file)
--- a/include/asm-ppc64/iommu.h
+++ b/include/asm-ppc64/iommu.h
@@ -49,6 +49,7 @@ struct iommu_table {
 };
 
 struct scatterlist;
+struct device_node;
 
 #ifdef CONFIG_PPC_MULTIPLATFORM
 
@@ -70,9 +71,8 @@ extern void iommu_devnode_init_pSeries(struct device_node *dn);
 
 #ifdef CONFIG_PPC_ISERIES
 
-struct iSeries_Device_Node;
 /* Creates table for an individual device node */
-extern void iommu_devnode_init_iSeries(struct iSeries_Device_Node *dn);
+extern void iommu_devnode_init_iSeries(struct device_node *dn);
 
 #endif /* CONFIG_PPC_ISERIES */
 

diff --git a/include/asm-ppc64/pci-bridge.h b/include/asm-ppc64/pci-bridge.h
index d8991389ab3960c598fbd030c7dc6e0385f40b90..8ca5fce626bb6d682f57392ba8fd8bd45e9cf144 100644 (file)
--- a/include/asm-ppc64/pci-bridge.h
+++ b/include/asm-ppc64/pci-bridge.h
@@ -4,6 +4,8 @@
 
 #include <linux/pci.h>
 
+#include <asm/iSeries/HvCallPci.h>
+
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -71,6 +73,14 @@ struct pci_dn {
        struct  iommu_table *iommu_table;       /* for phb's or bridges */
        struct  pci_dev *pcidev;        /* back-pointer to the pci device */
        struct  device_node *node;      /* back-pointer to the device_node */
+#ifdef CONFIG_PPC_ISERIES
+       union HvDsaMap  DsaAddr;        /* Direct Select Address */
+                                       /* busNumber, subBusNumber, */
+                                       /* deviceId, barNumber */
+       int             Irq;            /* Assigned IRQ */
+       int             Flags;          /* Possible flags(disable/bist)*/
+       u8              LogicalSlot;    /* Hv Slot Index for Tces */
+#endif
        u32     config_space[16];       /* saved PCI config space */
 };
 

diff --git a/include/asm-ppc64/prom.h b/include/asm-ppc64/prom.h
index c02ec1d6b909725b89acdb31c3b6eee99e015116..cf0284e081ea3f985fdc4aa224c167f94fc39651 100644 (file)
--- a/include/asm-ppc64/prom.h
+++ b/include/asm-ppc64/prom.h
@@ -137,6 +137,9 @@ struct device_node {
        struct  kref kref;
        unsigned long _flags;
        void    *data;
+#ifdef CONFIG_PPC_ISERIES
+       struct list_head Device_List;
+#endif
 };
 
 extern struct device_node *of_chosen;