Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Support multiple CPUs going through OS_MCA
  [IA64] silence GCC ia64 unused variable warnings
  [IA64] prevent MCA when performing MMIO mmap to PCI config space
  [IA64] add sn_register_pmi_handler oemcall
  [IA64] Stop bit for brl instruction
  [IA64] SN: Correct ROM resource length for BIOS copy
  [IA64] Don't set psr.ic and psr.i simultaneously

11 files changed, 106 insertions, 41 deletions

diff --git a/arch/ia64/kernel/gate.S b/arch/ia64/kernel/gate.S
index 3274850cf272..74b1ccce4e84 100644
--- a/arch/ia64/kernel/gate.S
+++ b/arch/ia64/kernel/gate.S
@@ -30,6 +30,7 @@
         .previous
 #define BRL_COND_FSYS_BUBBLE_DOWN(pr)                   \
 [1:](pr)brl.cond.sptk 0;                                \
+        ;;                                              \
         .xdata4 ".data.patch.brl_fsys_bubble_down", 1b-.
 
 GLOBAL_ENTRY(__kernel_syscall_via_break)
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 1ead5ea6c5ce..4b5daa3cc0fe 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -57,6 +57,9 @@
  *
  * 2006-09-15 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
  *            Add printing support for MCA/INIT.
+ *
+ * 2007-04-27 Russ Anderson <rja@sgi.com>
+ *            Support multiple cpus going through OS_MCA in the same event.
  */
 #include <linux/types.h>
 #include <linux/init.h>
@@ -96,7 +99,6 @@
 #endif
 
 /* Used by mca_asm.S */
-u32                             ia64_mca_serialize;
 DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
 DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
 DEFINE_PER_CPU(u64, ia64_mca_pal_pte);      /* PTE to map PAL code */
@@ -963,11 +965,12 @@ ia64_mca_modify_original_stack(struct pt_regs *regs,
                 goto no_mod;
         }
 
+        if (r13 != sos->prev_IA64_KR_CURRENT) {
+                msg = "inconsistent previous current and r13";
+                goto no_mod;
+        }
+
         if (!mca_recover_range(ms->pmsa_iip)) {
-                if (r13 != sos->prev_IA64_KR_CURRENT) {
-                        msg = "inconsistent previous current and r13";
-                        goto no_mod;
-                }
                 if ((r12 - r13) >= KERNEL_STACK_SIZE) {
                         msg = "inconsistent r12 and r13";
                         goto no_mod;
@@ -1187,6 +1190,13 @@ all_in:
  *      further MCA logging is enabled by clearing logs.
  *      Monarch also has the duty of sending wakeup-IPIs to pull the
  *      slave processors out of rendezvous spinloop.
+ *
+ *      If multiple processors call into OS_MCA, the first will become
+ *      the monarch.  Subsequent cpus will be recorded in the mca_cpu
+ *      bitmask.  After the first monarch has processed its MCA, it
+ *      will wake up the next cpu in the mca_cpu bitmask and then go
+ *      into the rendezvous loop.  When all processors have serviced
+ *      their MCA, the last monarch frees up the rest of the processors.
  */
 void
 ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
@@ -1196,16 +1206,32 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
         struct task_struct *previous_current;
         struct ia64_mca_notify_die nd =
                 { .sos = sos, .monarch_cpu = &monarch_cpu };
+        static atomic_t mca_count;
+        static cpumask_t mca_cpu;
 
+        if (atomic_add_return(1, &mca_count) == 1) {
+                monarch_cpu = cpu;
+                sos->monarch = 1;
+        } else {
+                cpu_set(cpu, mca_cpu);
+                sos->monarch = 0;
+        }
         mprintk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d "
                 "monarch=%ld\n", sos->proc_state_param, cpu, sos->monarch);
 
         previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
-        monarch_cpu = cpu;
+
         if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
                         == NOTIFY_STOP)
                 ia64_mca_spin(__FUNCTION__);
-        ia64_wait_for_slaves(cpu, "MCA");
+        if (sos->monarch) {
+                ia64_wait_for_slaves(cpu, "MCA");
+        } else {
+                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
+                while (cpu_isset(cpu, mca_cpu))
+                        cpu_relax();    /* spin until monarch wakes us */
+                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
+        }
 
         /* Wakeup all the processors which are spinning in the rendezvous loop.
          * They will leave SAL, then spin in the OS with interrupts disabled
@@ -1244,6 +1270,26 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
                         == NOTIFY_STOP)
                 ia64_mca_spin(__FUNCTION__);
 
+
+        if (atomic_dec_return(&mca_count) > 0) {
+                int i;
+
+                /* wake up the next monarch cpu,
+                 * and put this cpu in the rendez loop.
+                 */
+                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
+                for_each_online_cpu(i) {
+                        if (cpu_isset(i, mca_cpu)) {
+                                monarch_cpu = i;
+                                cpu_clear(i, mca_cpu);  /* wake next cpu */
+                                while (monarch_cpu != -1)
+                                        cpu_relax();    /* spin until last cpu leaves */
+                                ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
+                                set_curr_task(cpu, previous_current);
+                                return;
+                        }
+                }
+        }
         set_curr_task(cpu, previous_current);
         monarch_cpu = -1;
 }
diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S
index 8c9c26aa6ae0..0f5965fcdf85 100644
--- a/arch/ia64/kernel/mca_asm.S
+++ b/arch/ia64/kernel/mca_asm.S
@@ -133,14 +133,6 @@ ia64_do_tlb_purge:
 //StartMain////////////////////////////////////////////////////////////////////
 
 ia64_os_mca_dispatch:
-        // Serialize all MCA processing
-        mov     r3=1;;
-        LOAD_PHYSICAL(p0,r2,ia64_mca_serialize);;
-ia64_os_mca_spin:
-        xchg4   r4=[r2],r3;;
-        cmp.ne  p6,p0=r4,r0
-(p6)    br ia64_os_mca_spin
-
         mov r3=IA64_MCA_CPU_MCA_STACK_OFFSET    // use the MCA stack
         LOAD_PHYSICAL(p0,r2,1f)                 // return address
         mov r19=1                               // All MCA events are treated as monarch (for now)
@@ -291,10 +283,6 @@ END(ia64_os_mca_virtual_begin)
 
         mov             b0=r12                  // SAL_CHECK return address
 
-        // release lock
-        LOAD_PHYSICAL(p0,r3,ia64_mca_serialize);;
-        st4.rel         [r3]=r0
-
         br              b0
 
 //EndMain//////////////////////////////////////////////////////////////////////
diff --git a/arch/ia64/kernel/mca_drv_asm.S b/arch/ia64/kernel/mca_drv_asm.S
index f2d4900751ba..3bccb06c8d21 100644
--- a/arch/ia64/kernel/mca_drv_asm.S
+++ b/arch/ia64/kernel/mca_drv_asm.S
@@ -40,7 +40,11 @@ GLOBAL_ENTRY(mca_handler_bhhook)
         mov     b6=loc1
         ;;
         mov     loc1=rp
-        ssm     psr.i | psr.ic
+        ssm     psr.ic
+        ;;
+        srlz.i
+        ;;
+        ssm     psr.i
         br.call.sptk.many rp=b6         // does not return ...
         ;;
         mov     ar.pfs=loc0
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index af73b8dfde28..fa40cba43350 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -513,7 +513,8 @@ copy_thread (int nr, unsigned long clone_flags,
 static void
 do_copy_task_regs (struct task_struct *task, struct unw_frame_info *info, void *arg)
 {
-        unsigned long mask, sp, nat_bits = 0, ip, ar_rnat, urbs_end, cfm;
+        unsigned long mask, sp, nat_bits = 0, ar_rnat, urbs_end, cfm;
+        unsigned long uninitialized_var(ip);    /* GCC be quiet */
         elf_greg_t *dst = arg;
         struct pt_regs *pt;
         char nat;
diff --git a/arch/ia64/mm/tlb.c b/arch/ia64/mm/tlb.c
index fa4e6d4810f3..1682fc639038 100644
--- a/arch/ia64/mm/tlb.c
+++ b/arch/ia64/mm/tlb.c
@@ -175,7 +175,7 @@ EXPORT_SYMBOL(flush_tlb_range);
 void __devinit
 ia64_tlb_init (void)
 {
-        ia64_ptce_info_t ptce_info;
+        ia64_ptce_info_t uninitialized_var(ptce_info); /* GCC be quiet */
         unsigned long tr_pgbits;
         long status;
 
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 73696b4a2eed..07d0e92742c8 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -591,6 +591,9 @@ int
 pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
                      enum pci_mmap_state mmap_state, int write_combine)
 {
+        unsigned long size = vma->vm_end - vma->vm_start;
+        pgprot_t prot;
+
         /*
          * I/O space cannot be accessed via normal processor loads and
          * stores on this platform.
@@ -604,15 +607,24 @@ pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
                  */
                 return -EINVAL;
 
+        if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
+                return -EINVAL;
+
+        prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size,
+                                    vma->vm_page_prot);
+
         /*
-         * Leave vm_pgoff as-is, the PCI space address is the physical
-         * address on this platform.
+         * If the user requested WC, the kernel uses UC or WC for this region,
+         * and the chipset supports WC, we can use WC. Otherwise, we have to
+         * use the same attribute the kernel uses.
          */
-        if (write_combine && efi_range_is_wc(vma->vm_start,
-                                             vma->vm_end - vma->vm_start))
+        if (write_combine &&
+            ((pgprot_val(prot) & _PAGE_MA_MASK) == _PAGE_MA_UC ||
+             (pgprot_val(prot) & _PAGE_MA_MASK) == _PAGE_MA_WC) &&
+            efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
                 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
         else
-                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+                vma->vm_page_prot = prot;
 
         if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
                              vma->vm_end - vma->vm_start, vma->vm_page_prot))
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
index c6216f454ffb..3c7178f5dce8 100644
--- a/arch/ia64/sn/kernel/io_acpi_init.c
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -418,7 +418,7 @@ sn_acpi_slot_fixup(struct pci_dev *dev)
         void __iomem *addr;
         struct pcidev_info *pcidev_info = NULL;
         struct sn_irq_info *sn_irq_info = NULL;
-        size_t size;
+        size_t image_size, size;
 
         if (sn_acpi_get_pcidev_info(dev, &pcidev_info, &sn_irq_info)) {
                 panic("%s:  Failure obtaining pcidev_info for %s\n",
@@ -428,17 +428,16 @@ sn_acpi_slot_fixup(struct pci_dev *dev)
         if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
                 /*
                  * A valid ROM image exists and has been shadowed by the
-                 * PROM. Setup the pci_dev ROM resource to point to
-                 * the shadowed copy.
+                 * PROM. Setup the pci_dev ROM resource with the address
+                 * of the shadowed copy, and the actual length of the ROM image.
                  */
-                size = dev->resource[PCI_ROM_RESOURCE].end -
-                                dev->resource[PCI_ROM_RESOURCE].start;
-                addr =
-                     ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
-                             size);
+                size = pci_resource_len(dev, PCI_ROM_RESOURCE);
+                addr = ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+                               size);
+                image_size = pci_get_rom_size(addr, size);
                 dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
                 dev->resource[PCI_ROM_RESOURCE].end =
-                                                (unsigned long) addr + size;
+                                        (unsigned long) addr + image_size - 1;
                 dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
         }
         sn_pci_fixup_slot(dev, pcidev_info, sn_irq_info);
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 6b10e5d28488..906b93674b76 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -259,9 +259,23 @@ sn_io_slot_fixup(struct pci_dev *dev)
                         insert_resource(&ioport_resource, &dev->resource[idx]);
                 else
                         insert_resource(&iomem_resource, &dev->resource[idx]);
-                /* If ROM, mark as shadowed in PROM */
-                if (idx == PCI_ROM_RESOURCE)
-                        dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;
+                /*
+                 * If ROM, set the actual ROM image size, and mark as
+                 * shadowed in PROM.
+                 */
+                if (idx == PCI_ROM_RESOURCE) {
+                        size_t image_size;
+                        void __iomem *rom;
+
+                        rom = ioremap(pci_resource_start(dev, PCI_ROM_RESOURCE),
+                                      size + 1);
+                        image_size = pci_get_rom_size(rom, size + 1);
+                        dev->resource[PCI_ROM_RESOURCE].end =
+                                dev->resource[PCI_ROM_RESOURCE].start +
+                                image_size - 1;
+                        dev->resource[PCI_ROM_RESOURCE].flags |=
+                                                 IORESOURCE_ROM_BIOS_COPY;
+                }
         }
         /* Create a pci_window in the pci_controller struct for
          * each device resource.
diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 493380b2c05f..5a289e4de838 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -369,7 +369,7 @@ static void tio_corelet_reset(nasid_t nasid, int corelet)
 
 static int is_fpga_tio(int nasid, int *bt)
 {
-        u16 ioboard_type;
+        u16 uninitialized_var(ioboard_type);    /* GCC be quiet */
         s64 rc;
 
         rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard_type);
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index b42bfcae6f91..42485ad50ceb 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -80,7 +80,7 @@ static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
 u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
 {
         s64 rc;
-        u16 ioboard;
+        u16 uninitialized_var(ioboard);         /* GCC be quiet */
         nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
 
         rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);