Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

Pull powerpc updates from Benjamin Herrenschmidt:
 "Some highlights in addition to the usual batch of fixes:

   - 64TB address space support for 64-bit processes by Aneesh Kumar

   - Gavin Shan did a major cleanup & re-organization of our EEH support
     code (IBM fancy PCI error handling & recovery infrastructure) which
     paves the way for supporting different platform backends, along
     with some rework of the PCIe code for the PowerNV platform in order
     to remove home made resource allocations and instead use the
     generic code (which is possible after some small improvements to it
     done by Gavin).

   - Uprobes support by Ananth N Mavinakayanahalli

   - A pile of embedded updates from Freescale folks, including new SoC
     and board supports, more KVM stuff including preparing for 64-bit
     BookE KVM support, ePAPR 1.1 updates, etc..."

Fixup trivial conflicts in drivers/scsi/ipr.c

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (146 commits)
  powerpc/iommu: Fix multiple issues with IOMMU pools code
  powerpc: Fix VMX fix for memcpy case
  driver/mtd:IFC NAND:Initialise internal SRAM before any write
  powerpc/fsl-pci: use 'Header Type' to identify PCIE mode
  powerpc/eeh: Don't release eeh_mutex in eeh_phb_pe_get
  powerpc: Remove tlb batching hack for nighthawk
  powerpc: Set paca->data_offset = 0 for boot cpu
  powerpc/perf: Sample only if SIAR-Valid bit is set in P7+
  powerpc/fsl-pci: fix warning when CONFIG_SWIOTLB is disabled
  powerpc/mpc85xx: Update interrupt handling for IFC controller
  powerpc/85xx: Enable USB support in p1023rds_defconfig
  powerpc/smp: Do not disable IPI interrupts during suspend
  powerpc/eeh: Fix crash on converting OF node to edev
  powerpc/eeh: Lock module while handling EEH event
  powerpc/kprobe: Don't emulate store when kprobe stwu r1
  powerpc/kprobe: Complete kprobe and migrate exception frame
  powerpc/kprobe: Introduce a new thread flag
  powerpc: Remove unused __get_user64() and __put_user64()
  powerpc/eeh: Global mutex to protect PE tree
  powerpc/eeh: Remove EEH PE for normal PCI hotplug
  ...

2 files changed, 96 insertions, 60 deletions

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 4a652999380f..a5dec1ca1b82 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -245,6 +245,20 @@ static void hvc_port_destruct(struct tty_port *port)
         kfree(hp);
 }
 
+static void hvc_check_console(int index)
+{
+        /* Already enabled, bail out */
+        if (hvc_console.flags & CON_ENABLED)
+                return;
+
+        /* If this index is what the user requested, then register
+         * now (setup won't fail at this point).  It's ok to just
+         * call register again if previously .setup failed.
+         */
+        if (index == hvc_console.index)
+                register_console(&hvc_console);
+}
+
 /*
  * hvc_instantiate() is an early console discovery method which locates
  * consoles * prior to the vio subsystem discovering them.  Hotplugged
@@ -275,12 +289,8 @@ int hvc_instantiate(uint32_t vtermno, int index, const struct hv_ops *ops)
         if (last_hvc < index)
                 last_hvc = index;
 
-        /* if this index is what the user requested, then register
-         * now (setup won't fail at this point).  It's ok to just
-         * call register again if previously .setup failed.
-         */
-        if (index == hvc_console.index)
-                register_console(&hvc_console);
+        /* check if we need to re-register the kernel console */
+        hvc_check_console(index);
 
         return 0;
 }
@@ -877,10 +887,15 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
                 i = ++last_hvc;
 
         hp->index = i;
+        cons_ops[i] = ops;
+        vtermnos[i] = vtermno;
 
         list_add_tail(&(hp->next), &hvc_structs);
         spin_unlock(&hvc_structs_lock);
 
+        /* check if we need to re-register the kernel console */
+        hvc_check_console(i);
+
         return hp;
 }
 EXPORT_SYMBOL_GPL(hvc_alloc);
@@ -893,8 +908,12 @@ int hvc_remove(struct hvc_struct *hp)
         tty = tty_port_tty_get(&hp->port);
 
         spin_lock_irqsave(&hp->lock, flags);
-        if (hp->index < MAX_NR_HVC_CONSOLES)
+        if (hp->index < MAX_NR_HVC_CONSOLES) {
+                console_lock();
                 vtermnos[hp->index] = -1;
+                cons_ops[hp->index] = NULL;
+                console_unlock();
+        }
 
         /* Don't whack hp->irq because tty_hangup() will need to free the irq. */
 
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index ee307799271a..070c0ee68642 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -230,6 +230,69 @@ static const struct hv_ops hvterm_hvsi_ops = {
         .tiocmset = hvterm_hvsi_tiocmset,
 };
 
+static void udbg_hvc_putc(char c)
+{
+        int count = -1;
+
+        if (!hvterm_privs[0])
+                return;
+
+        if (c == '\n')
+                udbg_hvc_putc('\r');
+
+        do {
+                switch(hvterm_privs[0]->proto) {
+                case HV_PROTOCOL_RAW:
+                        count = hvterm_raw_put_chars(0, &c, 1);
+                        break;
+                case HV_PROTOCOL_HVSI:
+                        count = hvterm_hvsi_put_chars(0, &c, 1);
+                        break;
+                }
+        } while(count == 0);
+}
+
+static int udbg_hvc_getc_poll(void)
+{
+        int rc = 0;
+        char c;
+
+        if (!hvterm_privs[0])
+                return -1;
+
+        switch(hvterm_privs[0]->proto) {
+        case HV_PROTOCOL_RAW:
+                rc = hvterm_raw_get_chars(0, &c, 1);
+                break;
+        case HV_PROTOCOL_HVSI:
+                rc = hvterm_hvsi_get_chars(0, &c, 1);
+                break;
+        }
+        if (!rc)
+                return -1;
+        return c;
+}
+
+static int udbg_hvc_getc(void)
+{
+        int ch;
+
+        if (!hvterm_privs[0])
+                return -1;
+
+        for (;;) {
+                ch = udbg_hvc_getc_poll();
+                if (ch == -1) {
+                        /* This shouldn't be needed...but... */
+                        volatile unsigned long delay;
+                        for (delay=0; delay < 2000000; delay++)
+                                ;
+                } else {
+                        return ch;
+                }
+        }
+}
+
 static int __devinit hvc_vio_probe(struct vio_dev *vdev,
                                    const struct vio_device_id *id)
 {
@@ -289,6 +352,13 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
                 return PTR_ERR(hp);
         dev_set_drvdata(&vdev->dev, hp);
 
+        /* register udbg if it's not there already for console 0 */
+        if (hp->index == 0 && !udbg_putc) {
+                udbg_putc = udbg_hvc_putc;
+                udbg_getc = udbg_hvc_getc;
+                udbg_getc_poll = udbg_hvc_getc_poll;
+        }
+
         return 0;
 }
 
@@ -331,59 +401,6 @@ static void __exit hvc_vio_exit(void)
 }
 module_exit(hvc_vio_exit);
 
-static void udbg_hvc_putc(char c)
-{
-        int count = -1;
-
-        if (c == '\n')
-                udbg_hvc_putc('\r');
-
-        do {
-                switch(hvterm_priv0.proto) {
-                case HV_PROTOCOL_RAW:
-                        count = hvterm_raw_put_chars(0, &c, 1);
-                        break;
-                case HV_PROTOCOL_HVSI:
-                        count = hvterm_hvsi_put_chars(0, &c, 1);
-                        break;
-                }
-        } while(count == 0);
-}
-
-static int udbg_hvc_getc_poll(void)
-{
-        int rc = 0;
-        char c;
-
-        switch(hvterm_priv0.proto) {
-        case HV_PROTOCOL_RAW:
-                rc = hvterm_raw_get_chars(0, &c, 1);
-                break;
-        case HV_PROTOCOL_HVSI:
-                rc = hvterm_hvsi_get_chars(0, &c, 1);
-                break;
-        }
-        if (!rc)
-                return -1;
-        return c;
-}
-
-static int udbg_hvc_getc(void)
-{
-        int ch;
-        for (;;) {
-                ch = udbg_hvc_getc_poll();
-                if (ch == -1) {
-                        /* This shouldn't be needed...but... */
-                        volatile unsigned long delay;
-                        for (delay=0; delay < 2000000; delay++)
-                                ;
-                } else {
-                        return ch;
-                }
-        }
-}
-
 void __init hvc_vio_init_early(void)
 {
         struct device_node *stdout_node;