11 files changed, 105 insertions, 78 deletions

diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index 0e4553f320bf..ad8215a3c586 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -45,7 +45,8 @@ CPPFLAGS_gate.lds := -P -C -U$(ARCH)
 quiet_cmd_gate = GATE $@
       cmd_gate = $(CC) -nostdlib $(GATECFLAGS_$(@F)) -Wl,-T,$(filter-out FORCE,$^) -o $@
 
-GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1
+GATECFLAGS_gate.so = -shared -s -Wl,-soname=linux-gate.so.1 \
+                     $(call ld-option, -Wl$(comma)--hash-style=sysv)
 $(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE
         $(call if_changed,gate)
 
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index e4bfa9dafbce..bb8770a177b5 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -632,7 +632,7 @@ kern_memory_descriptor (unsigned long phys_addr)
                 if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
                          return md;
         }
-        return 0;
+        return NULL;
 }
 
 static efi_memory_desc_t *
@@ -652,7 +652,7 @@ efi_memory_descriptor (unsigned long phys_addr)
                 if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT))
                          return md;
         }
-        return 0;
+        return NULL;
 }
 
 u32
@@ -923,7 +923,7 @@ find_memmap_space (void)
 void
 efi_memmap_init(unsigned long *s, unsigned long *e)
 {
-        struct kern_memdesc *k, *prev = 0;
+        struct kern_memdesc *k, *prev = NULL;
         u64     contig_low=0, contig_high=0;
         u64     as, ae, lim;
         void *efi_map_start, *efi_map_end, *p, *q;
diff --git a/arch/ia64/kernel/gate.lds.S b/arch/ia64/kernel/gate.lds.S
index cc35cddfd4cf..6d198339bf85 100644
--- a/arch/ia64/kernel/gate.lds.S
+++ b/arch/ia64/kernel/gate.lds.S
@@ -12,6 +12,7 @@ SECTIONS
   . = GATE_ADDR + SIZEOF_HEADERS;
 
   .hash                         : { *(.hash) }                          :readable
+  .gnu.hash                     : { *(.gnu.hash) }
   .dynsym                       : { *(.dynsym) }
   .dynstr                       : { *(.dynstr) }
   .gnu.version                  : { *(.gnu.version) }
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index 561b8f1d3bc7..29236f0c62b5 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -853,7 +853,6 @@ END(__ia64_init_fpu)
  */
 GLOBAL_ENTRY(ia64_switch_mode_phys)
  {
-        alloc r2=ar.pfs,0,0,0,0
         rsm psr.i | psr.ic              // disable interrupts and interrupt collection
         mov r15=ip
  }
@@ -902,7 +901,6 @@ END(ia64_switch_mode_phys)
  */
 GLOBAL_ENTRY(ia64_switch_mode_virt)
  {
-        alloc r2=ar.pfs,0,0,0,0
         rsm psr.i | psr.ic              // disable interrupts and interrupt collection
         mov r15=ip
  }
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index b7cf651ceb14..3ead20fb6f4b 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -62,7 +62,7 @@ EXPORT_SYMBOL(__udivdi3);
 EXPORT_SYMBOL(__moddi3);
 EXPORT_SYMBOL(__umoddi3);
 
-#if defined(CONFIG_MD_RAID5) || defined(CONFIG_MD_RAID5_MODULE)
+#if defined(CONFIG_MD_RAID456) || defined(CONFIG_MD_RAID456_MODULE)
 extern void xor_ia64_2(void);
 extern void xor_ia64_3(void);
 extern void xor_ia64_4(void);
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 00d9c83b8020..781960f80b6f 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -448,11 +448,20 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
         return 0;
 }
 
+void __kprobes flush_insn_slot(struct kprobe *p)
+{
+        unsigned long arm_addr;
+
+        arm_addr = ((unsigned long)&p->opcode.bundle) & ~0xFULL;
+        flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
+}
+
 void __kprobes arch_arm_kprobe(struct kprobe *p)
 {
         unsigned long addr = (unsigned long)p->addr;
         unsigned long arm_addr = addr & ~0xFULL;
 
+        flush_insn_slot(p);
         memcpy((char *)arm_addr, &p->ainsn.insn.bundle, sizeof(bundle_t));
         flush_icache_range(arm_addr, arm_addr + sizeof(bundle_t));
 }
diff --git a/arch/ia64/kernel/pal.S b/arch/ia64/kernel/pal.S
index 5018c7f2e7a8..ebaf1e685f5e 100644
--- a/arch/ia64/kernel/pal.S
+++ b/arch/ia64/kernel/pal.S
@@ -217,12 +217,7 @@ GLOBAL_ENTRY(ia64_pal_call_phys_stacked)
         .body
         ;;
         ld8 loc2 = [loc2]               // loc2 <- entry point
-        mov out0 = in0          // first argument
-        mov out1 = in1          // copy arg2
-        mov out2 = in2          // copy arg3
-        mov out3 = in3          // copy arg3
-        ;;
-        mov loc3 = psr          // save psr
+        mov loc3 = psr                  // save psr
         ;;
         mov loc4=ar.rsc                 // save RSE configuration
         dep.z loc2=loc2,0,61            // convert pal entry point to physical
@@ -236,18 +231,23 @@ GLOBAL_ENTRY(ia64_pal_call_phys_stacked)
         ;;
         andcm r16=loc3,r16              // removes bits to clear from psr
         br.call.sptk.many rp=ia64_switch_mode_phys
-.ret6:
+
+        mov out0 = in0                  // first argument
+        mov out1 = in1                  // copy arg2
+        mov out2 = in2                  // copy arg3
+        mov out3 = in3                  // copy arg3
         mov loc5 = r19
         mov loc6 = r20
+
         br.call.sptk.many rp=b7         // now make the call
-.ret7:
+
         mov ar.rsc=0                    // put RSE in enforced lazy, LE mode
         mov r16=loc3                    // r16= original psr
         mov r19=loc5
         mov r20=loc6
         br.call.sptk.many rp=ia64_switch_mode_virt      // return to virtual mode
 
-.ret8:  mov psr.l  = loc3               // restore init PSR
+        mov psr.l  = loc3               // restore init PSR
         mov ar.pfs = loc1
         mov rp = loc0
         ;;
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index 3f5bac59209a..0b546e2b36ac 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -566,29 +566,23 @@ version_info(char *page)
         pal_version_u_t min_ver, cur_ver;
         char *p = page;
 
-        /* The PAL_VERSION call is advertised as being able to support
-         * both physical and virtual mode calls. This seems to be a documentation
-         * bug rather than firmware bug. In fact, it does only support physical mode.
-         * So now the code reflects this fact and the pal_version() has been updated
-         * accordingly.
-         */
-        if (ia64_pal_version(&min_ver, &cur_ver) != 0) return 0;
+        if (ia64_pal_version(&min_ver, &cur_ver) != 0)
+                return 0;
 
         p += sprintf(p,
                      "PAL_vendor : 0x%02x (min=0x%02x)\n"
-                     "PAL_A      : %x.%x.%x (min=%x.%x.%x)\n"
-                     "PAL_B      : %x.%x.%x (min=%x.%x.%x)\n",
-                     cur_ver.pal_version_s.pv_pal_vendor, min_ver.pal_version_s.pv_pal_vendor,
-
-                     cur_ver.pal_version_s.pv_pal_a_model>>4,
-                     cur_ver.pal_version_s.pv_pal_a_model&0xf, cur_ver.pal_version_s.pv_pal_a_rev,
-                     min_ver.pal_version_s.pv_pal_a_model>>4,
-                     min_ver.pal_version_s.pv_pal_a_model&0xf, min_ver.pal_version_s.pv_pal_a_rev,
-
-                     cur_ver.pal_version_s.pv_pal_b_model>>4,
-                     cur_ver.pal_version_s.pv_pal_b_model&0xf, cur_ver.pal_version_s.pv_pal_b_rev,
-                     min_ver.pal_version_s.pv_pal_b_model>>4,
-                     min_ver.pal_version_s.pv_pal_b_model&0xf, min_ver.pal_version_s.pv_pal_b_rev);
+                     "PAL_A      : %02x.%02x (min=%02x.%02x)\n"
+                     "PAL_B      : %02x.%02x (min=%02x.%02x)\n",
+                     cur_ver.pal_version_s.pv_pal_vendor,
+                     min_ver.pal_version_s.pv_pal_vendor,
+                     cur_ver.pal_version_s.pv_pal_a_model,
+                     cur_ver.pal_version_s.pv_pal_a_rev,
+                     min_ver.pal_version_s.pv_pal_a_model,
+                     min_ver.pal_version_s.pv_pal_a_rev,
+                     cur_ver.pal_version_s.pv_pal_b_model,
+                     cur_ver.pal_version_s.pv_pal_b_rev,
+                     min_ver.pal_version_s.pv_pal_b_model,
+                     min_ver.pal_version_s.pv_pal_b_rev);
         return p - page;
 }
 
@@ -958,9 +952,9 @@ remove_palinfo_proc_entries(unsigned int hcpu)
         }
 }
 
-static int __cpuinit palinfo_cpu_callback(struct notifier_block *nfb,
-                                                                unsigned long action,
-                                                                void *hcpu)
+#ifdef CONFIG_HOTPLUG_CPU
+static int palinfo_cpu_callback(struct notifier_block *nfb,
+                                        unsigned long action, void *hcpu)
 {
         unsigned int hotcpu = (unsigned long)hcpu;
 
@@ -968,20 +962,19 @@ static int __cpuinit palinfo_cpu_callback(struct notifier_block *nfb,
         case CPU_ONLINE:
                 create_palinfo_proc_entries(hotcpu);
                 break;
-#ifdef CONFIG_HOTPLUG_CPU
         case CPU_DEAD:
                 remove_palinfo_proc_entries(hotcpu);
                 break;
-#endif
         }
         return NOTIFY_OK;
 }
 
-static struct notifier_block __cpuinitdata palinfo_cpu_notifier =
+static struct notifier_block palinfo_cpu_notifier =
 {
         .notifier_call = palinfo_cpu_callback,
         .priority = 0,
 };
+#endif
 
 static int __init
 palinfo_init(void)
@@ -1020,7 +1013,7 @@ palinfo_exit(void)
         /*
          * Unregister from cpu notifier callbacks
          */
-        unregister_cpu_notifier(&palinfo_cpu_notifier);
+        unregister_hotcpu_notifier(&palinfo_cpu_notifier);
 }
 
 module_init(palinfo_init);
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index b146f1cfad31..d24fa393b182 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -435,7 +435,7 @@ static int __cpuinit cache_sysfs_init(void)
                                 (void *)(long)i);
         }
 
-        register_cpu_notifier(&cache_cpu_notifier);
+        register_hotcpu_notifier(&cache_cpu_notifier);
 
         return 0;
 }
diff --git a/arch/ia64/kernel/traps.c b/arch/ia64/kernel/traps.c
index e7bbb0f40aa2..5a0420464c6c 100644
--- a/arch/ia64/kernel/traps.c
+++ b/arch/ia64/kernel/traps.c
@@ -117,11 +117,8 @@ die (const char *str, struct pt_regs *regs, long err)
         die.lock_owner = -1;
         spin_unlock_irq(&die.lock);
 
-        if (panic_on_oops) {
-                printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
-                ssleep(5);
-                panic("Fatal exception");
-        }
+        if (panic_on_oops)
+                panic("Fatal exception: panic_on_oops");
 
         do_exit(SIGSEGV);
 }
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index 5f03b9e524dd..4c73a6763669 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -32,32 +32,38 @@
 
 extern void __init efi_memmap_walk_uc(efi_freemem_callback_t, void *);
 
-#define MAX_UNCACHED_GRANULES   5
-static int allocated_granules;
+struct uncached_pool {
+        struct gen_pool *pool;
+        struct mutex add_chunk_mutex;   /* serialize adding a converted chunk */
+        int nchunks_added;              /* #of converted chunks added to pool */
+        atomic_t status;                /* smp called function's return status*/
+};
+
+#define MAX_CONVERTED_CHUNKS_PER_NODE   2
 
-struct gen_pool *uncached_pool[MAX_NUMNODES];
+struct uncached_pool uncached_pools[MAX_NUMNODES];
 
 
 static void uncached_ipi_visibility(void *data)
 {
         int status;
+        struct uncached_pool *uc_pool = (struct uncached_pool *)data;
 
         status = ia64_pal_prefetch_visibility(PAL_VISIBILITY_PHYSICAL);
         if ((status != PAL_VISIBILITY_OK) &&
             (status != PAL_VISIBILITY_OK_REMOTE_NEEDED))
-                printk(KERN_DEBUG "pal_prefetch_visibility() returns %i on "
-                       "CPU %i\n", status, raw_smp_processor_id());
+                atomic_inc(&uc_pool->status);
 }
 
 
 static void uncached_ipi_mc_drain(void *data)
 {
         int status;
+        struct uncached_pool *uc_pool = (struct uncached_pool *)data;
 
         status = ia64_pal_mc_drain();
-        if (status)
-                printk(KERN_WARNING "ia64_pal_mc_drain() failed with %i on "
-                       "CPU %i\n", status, raw_smp_processor_id());
+        if (status != PAL_STATUS_SUCCESS)
+                atomic_inc(&uc_pool->status);
 }
 
 
@@ -70,21 +76,34 @@ static void uncached_ipi_mc_drain(void *data)
  * This is accomplished by first allocating a granule of cached memory pages
  * and then converting them to uncached memory pages.
  */
-static int uncached_add_chunk(struct gen_pool *pool, int nid)
+static int uncached_add_chunk(struct uncached_pool *uc_pool, int nid)
 {
         struct page *page;
-        int status, i;
+        int status, i, nchunks_added = uc_pool->nchunks_added;
         unsigned long c_addr, uc_addr;
 
-        if (allocated_granules >= MAX_UNCACHED_GRANULES)
+        if (mutex_lock_interruptible(&uc_pool->add_chunk_mutex) != 0)
+                return -1;      /* interrupted by a signal */
+
+        if (uc_pool->nchunks_added > nchunks_added) {
+                /* someone added a new chunk while we were waiting */
+                mutex_unlock(&uc_pool->add_chunk_mutex);
+                return 0;
+        }
+
+        if (uc_pool->nchunks_added >= MAX_CONVERTED_CHUNKS_PER_NODE) {
+                mutex_unlock(&uc_pool->add_chunk_mutex);
                 return -1;
+        }
 
         /* attempt to allocate a granule's worth of cached memory pages */
 
         page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO,
                                 IA64_GRANULE_SHIFT-PAGE_SHIFT);
-        if (!page)
+        if (!page) {
+                mutex_unlock(&uc_pool->add_chunk_mutex);
                 return -1;
+        }
 
         /* convert the memory pages from cached to uncached */
 
@@ -102,11 +121,14 @@ static int uncached_add_chunk(struct gen_pool *pool, int nid)
         flush_tlb_kernel_range(uc_addr, uc_adddr + IA64_GRANULE_SIZE);
 
         status = ia64_pal_prefetch_visibility(PAL_VISIBILITY_PHYSICAL);
-        if (!status) {
-                status = smp_call_function(uncached_ipi_visibility, NULL, 0, 1);
-                if (status)
+        if (status == PAL_VISIBILITY_OK_REMOTE_NEEDED) {
+                atomic_set(&uc_pool->status, 0);
+                status = smp_call_function(uncached_ipi_visibility, uc_pool,
+                                           0, 1);
+                if (status || atomic_read(&uc_pool->status))
                         goto failed;
-        }
+        } else if (status != PAL_VISIBILITY_OK)
+                goto failed;
 
         preempt_disable();
 
@@ -120,20 +142,24 @@ static int uncached_add_chunk(struct gen_pool *pool, int nid)
 
         preempt_enable();
 
-        ia64_pal_mc_drain();
-        status = smp_call_function(uncached_ipi_mc_drain, NULL, 0, 1);
-        if (status)
+        status = ia64_pal_mc_drain();
+        if (status != PAL_STATUS_SUCCESS)
+                goto failed;
+        atomic_set(&uc_pool->status, 0);
+        status = smp_call_function(uncached_ipi_mc_drain, uc_pool, 0, 1);
+        if (status || atomic_read(&uc_pool->status))
                 goto failed;
 
         /*
          * The chunk of memory pages has been converted to uncached so now we
          * can add it to the pool.
          */
-        status = gen_pool_add(pool, uc_addr, IA64_GRANULE_SIZE, nid);
+        status = gen_pool_add(uc_pool->pool, uc_addr, IA64_GRANULE_SIZE, nid);
         if (status)
                 goto failed;
 
-        allocated_granules++;
+        uc_pool->nchunks_added++;
+        mutex_unlock(&uc_pool->add_chunk_mutex);
         return 0;
 
         /* failed to convert or add the chunk so give it back to the kernel */
@@ -142,6 +168,7 @@ failed:
                 ClearPageUncached(&page[i]);
 
         free_pages(c_addr, IA64_GRANULE_SHIFT-PAGE_SHIFT);
+        mutex_unlock(&uc_pool->add_chunk_mutex);
         return -1;
 }
 
@@ -158,7 +185,7 @@ failed:
 unsigned long uncached_alloc_page(int starting_nid)
 {
         unsigned long uc_addr;
-        struct gen_pool *pool;
+        struct uncached_pool *uc_pool;
         int nid;
 
         if (unlikely(starting_nid >= MAX_NUMNODES))
@@ -171,14 +198,14 @@ unsigned long uncached_alloc_page(int starting_nid)
         do {
                 if (!node_online(nid))
                         continue;
-                pool = uncached_pool[nid];
-                if (pool == NULL)
+                uc_pool = &uncached_pools[nid];
+                if (uc_pool->pool == NULL)
                         continue;
                 do {
-                        uc_addr = gen_pool_alloc(pool, PAGE_SIZE);
+                        uc_addr = gen_pool_alloc(uc_pool->pool, PAGE_SIZE);
                         if (uc_addr != 0)
                                 return uc_addr;
-                } while (uncached_add_chunk(pool, nid) == 0);
+                } while (uncached_add_chunk(uc_pool, nid) == 0);
 
         } while ((nid = (nid + 1) % MAX_NUMNODES) != starting_nid);
 
@@ -197,7 +224,7 @@ EXPORT_SYMBOL(uncached_alloc_page);
 void uncached_free_page(unsigned long uc_addr)
 {
         int nid = paddr_to_nid(uc_addr - __IA64_UNCACHED_OFFSET);
-        struct gen_pool *pool = uncached_pool[nid];
+        struct gen_pool *pool = uncached_pools[nid].pool;
 
         if (unlikely(pool == NULL))
                 return;
@@ -224,7 +251,7 @@ static int __init uncached_build_memmap(unsigned long uc_start,
                                         unsigned long uc_end, void *arg)
 {
         int nid = paddr_to_nid(uc_start - __IA64_UNCACHED_OFFSET);
-        struct gen_pool *pool = uncached_pool[nid];
+        struct gen_pool *pool = uncached_pools[nid].pool;
         size_t size = uc_end - uc_start;
 
         touch_softlockup_watchdog();
@@ -242,7 +269,8 @@ static int __init uncached_init(void)
         int nid;
 
         for_each_online_node(nid) {
-                uncached_pool[nid] = gen_pool_create(PAGE_SHIFT, nid);
+                uncached_pools[nid].pool = gen_pool_create(PAGE_SHIFT, nid);
+                mutex_init(&uncached_pools[nid].add_chunk_mutex);
         }
 
         efi_memmap_walk_uc(uncached_build_memmap, NULL);