12 files changed, 86 insertions, 19 deletions

diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index f948419c888a..efe07990e7fc 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -642,9 +642,13 @@ static void map_cpu_to_logical_apicid(void)
 {
         int cpu = smp_processor_id();
         int apicid = logical_smp_processor_id();
+        int node = apicid_to_node(apicid);
+
+        if (!node_online(node))
+                node = first_online_node;
 
         cpu_2_logical_apicid[cpu] = apicid;
-        map_cpu_to_node(cpu, apicid_to_node(apicid));
+        map_cpu_to_node(cpu, node);
 }
 
 static void unmap_cpu_to_logical_apicid(int cpu)
diff --git a/arch/i386/mm/boot_ioremap.c b/arch/i386/mm/boot_ioremap.c
index 5d44f4f5ff59..4de11f508c3a 100644
--- a/arch/i386/mm/boot_ioremap.c
+++ b/arch/i386/mm/boot_ioremap.c
@@ -29,8 +29,11 @@
  */
 
 #define BOOT_PTE_PTRS (PTRS_PER_PTE*2)
-#define boot_pte_index(address) \
-             (((address) >> PAGE_SHIFT) & (BOOT_PTE_PTRS - 1))
+
+static unsigned long boot_pte_index(unsigned long vaddr) 
+{
+        return __pa(vaddr) >> PAGE_SHIFT;
+}
 
 static inline boot_pte_t* boot_vaddr_to_pte(void *address)
 {
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 0176556aeecc..32c3abededc6 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -771,16 +771,19 @@ int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
 {
 #ifdef CONFIG_ACPI_NUMA
         int pxm_id;
+        int nid;
 
         pxm_id = acpi_get_pxm(handle);
-
         /*
-         * Assuming that the container driver would have set the proximity
-         * domain and would have initialized pxm_to_node(pxm_id) && pxm_flag
+         * We don't have cpu-only-node hotadd. But if the system equips
+         * SRAT table, pxm is already found and node is ready.
+         * So, just pxm_to_nid(pxm) is OK.
+         * This code here is for the system which doesn't have full SRAT
+         * table for possible cpus.
          */
-        node_cpuid[cpu].nid = (pxm_id < 0) ? 0 : pxm_to_node(pxm_id);
-
+        nid = acpi_map_pxm_to_node(pxm_id);
         node_cpuid[cpu].phys_id = physid;
+        node_cpuid[cpu].nid = nid;
 #endif
         return (0);
 }
diff --git a/arch/ia64/kernel/numa.c b/arch/ia64/kernel/numa.c
index 1cc360c83e7a..20340631179f 100644
--- a/arch/ia64/kernel/numa.c
+++ b/arch/ia64/kernel/numa.c
@@ -29,6 +29,36 @@ EXPORT_SYMBOL(cpu_to_node_map);
 
 cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
 
+void __cpuinit map_cpu_to_node(int cpu, int nid)
+{
+        int oldnid;
+        if (nid < 0) { /* just initialize by zero */
+                cpu_to_node_map[cpu] = 0;
+                return;
+        }
+        /* sanity check first */
+        oldnid = cpu_to_node_map[cpu];
+        if (cpu_isset(cpu, node_to_cpu_mask[oldnid])) {
+                return; /* nothing to do */
+        }
+        /* we don't have cpu-driven node hot add yet...
+           In usual case, node is created from SRAT at boot time. */
+        if (!node_online(nid))
+                nid = first_online_node;
+        cpu_to_node_map[cpu] = nid;
+        cpu_set(cpu, node_to_cpu_mask[nid]);
+        return;
+}
+
+void __cpuinit unmap_cpu_from_node(int cpu, int nid)
+{
+        WARN_ON(!cpu_isset(cpu, node_to_cpu_mask[nid]));
+        WARN_ON(cpu_to_node_map[cpu] != nid);
+        cpu_to_node_map[cpu] = 0;
+        cpu_clear(cpu, node_to_cpu_mask[nid]);
+}
+
+
 /**
  * build_cpu_to_node_map - setup cpu to node and node to cpumask arrays
  *
@@ -49,8 +79,6 @@ void __init build_cpu_to_node_map(void)
                                 node = node_cpuid[i].nid;
                                 break;
                         }
-                cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
-                if (node >= 0)
-                        cpu_set(cpu, node_to_cpu_mask[node]);
+                map_cpu_to_node(cpu, node);
         }
 }
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index f648c610b10c..05bdf7affb43 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -36,6 +36,9 @@ int arch_register_cpu(int num)
          */
         if (!can_cpei_retarget() && is_cpu_cpei_target(num))
                 sysfs_cpus[num].cpu.no_control = 1;
+#ifdef CONFIG_NUMA
+        map_cpu_to_node(num, node_cpuid[num].nid);
+#endif
 #endif
 
         return register_cpu(&sysfs_cpus[num].cpu, num);
@@ -45,7 +48,8 @@ int arch_register_cpu(int num)
 
 void arch_unregister_cpu(int num)
 {
-        return unregister_cpu(&sysfs_cpus[num].cpu);
+        unregister_cpu(&sysfs_cpus[num].cpu);
+        unmap_cpu_from_node(num, cpu_to_node(num));
 }
 EXPORT_SYMBOL(arch_register_cpu);
 EXPORT_SYMBOL(arch_unregister_cpu);
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 6e6a7c7a7eff..ab6429b4a84e 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -209,11 +209,12 @@ static const unsigned char days_in_mo[] =
  */
 static inline unsigned char rtc_is_updating(void)
 {
+        unsigned long flags;
         unsigned char uip;
 
-        spin_lock_irq(&rtc_lock);
+        spin_lock_irqsave(&rtc_lock, flags);
         uip = (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP);
-        spin_unlock_irq(&rtc_lock);
+        spin_unlock_irqrestore(&rtc_lock, flags);
         return uip;
 }
 
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index 88bf2af2a0e7..edd7b83c3464 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -836,7 +836,7 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
                         break;
                 }
 
-                if (index<=0 || index >= vfd->tvnormsize) {
+                if (index < 0 || index >= vfd->tvnormsize) {
                         ret=-EINVAL;
                         break;
                 }
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index 4f78f234473d..c151dcf68786 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -397,6 +397,12 @@ static ssize_t store_bl_curve(struct class_device *class_device,
         u8 tmp_curve[FB_BACKLIGHT_LEVELS];
         unsigned int i;
 
+        /* Some drivers don't use framebuffer_alloc(), but those also
+         * don't have backlights.
+         */
+        if (!fb_info || !fb_info->bl_dev)
+                return -ENODEV;
+
         if (count != (FB_BACKLIGHT_LEVELS / 8 * 24))
                 return -EINVAL;
 
@@ -430,6 +436,12 @@ static ssize_t show_bl_curve(struct class_device *class_device, char *buf)
         ssize_t len = 0;
         unsigned int i;
 
+        /* Some drivers don't use framebuffer_alloc(), but those also
+         * don't have backlights.
+         */
+        if (!fb_info || !fb_info->bl_dev)
+                return -ENODEV;
+
         mutex_lock(&fb_info->bl_mutex);
         for (i = 0; i < FB_BACKLIGHT_LEVELS; i += 8)
                 len += snprintf(&buf[len], PAGE_SIZE,
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 8dbd44f10e9d..d96e5c14a9ca 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -32,7 +32,7 @@ static inline int autofs4_can_expire(struct dentry *dentry,
 
         if (!do_now) {
                 /* Too young to die */
-                if (time_after(ino->last_used + timeout, now))
+                if (!timeout || time_after(ino->last_used + timeout, now))
                         return 0;
 
                 /* update last_used here :-
@@ -253,7 +253,7 @@ static struct dentry *autofs4_expire_direct(struct super_block *sb,
         struct dentry *root = dget(sb->s_root);
         int do_now = how & AUTOFS_EXP_IMMEDIATE;
 
-        if (!sbi->exp_timeout || !root)
+        if (!root)
                 return NULL;
 
         now = jiffies;
@@ -293,7 +293,7 @@ static struct dentry *autofs4_expire_indirect(struct super_block *sb,
         int do_now = how & AUTOFS_EXP_IMMEDIATE;
         int exp_leaves = how & AUTOFS_EXP_LEAVES;
 
-        if ( !sbi->exp_timeout || !root )
+        if (!root)
                 return NULL;
 
         now = jiffies;
diff --git a/include/asm-ia64/numa.h b/include/asm-ia64/numa.h
index e5a8260593a5..e0a1d173e42d 100644
--- a/include/asm-ia64/numa.h
+++ b/include/asm-ia64/numa.h
@@ -64,6 +64,10 @@ extern int paddr_to_nid(unsigned long paddr);
 
 #define local_nodeid (cpu_to_node_map[smp_processor_id()])
 
+extern void map_cpu_to_node(int cpu, int nid);
+extern void unmap_cpu_from_node(int cpu, int nid);
+
+
 #else /* !CONFIG_NUMA */
 
 #define paddr_to_nid(addr)      0
diff --git a/kernel/module.c b/kernel/module.c
index 2a19cd47c046..b7fe6e840963 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1054,6 +1054,12 @@ static int mod_sysfs_setup(struct module *mod,
 {
         int err;
 
+        if (!module_subsys.kset.subsys) {
+                printk(KERN_ERR "%s: module_subsys not initialized\n",
+                       mod->name);
+                err = -EINVAL;
+                goto out;
+        }
         memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
         err = kobject_set_name(&mod->mkobj.kobj, "%s", mod->name);
         if (err)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3b5358a0561f..8a52ba9fe693 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1845,8 +1845,10 @@ static inline void free_zone_pagesets(int cpu)
         for_each_zone(zone) {
                 struct per_cpu_pageset *pset = zone_pcp(zone, cpu);
 
+                /* Free per_cpu_pageset if it is slab allocated */
+                if (pset != &boot_pageset[cpu])
+                        kfree(pset);
                 zone_pcp(zone, cpu) = NULL;
-                kfree(pset);
         }
 }