14 files changed, 122 insertions, 71 deletions

diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
index 9be01b0c3f48..e24566b88a78 100644
--- a/arch/arm/mach-ep93xx/ts72xx.c
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -111,21 +111,21 @@ static void __init ts72xx_map_io(void)
         }
 }
 
-static unsigned char ts72xx_rtc_readb(unsigned long addr)
+static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
 {
         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
         return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
 }
 
-static void ts72xx_rtc_writeb(unsigned char value, unsigned long addr)
+static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
 {
         __raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
         __raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
 }
 
 static struct m48t86_ops ts72xx_rtc_ops = {
-        .readb                  = ts72xx_rtc_readb,
-        .writeb                 = ts72xx_rtc_writeb,
+        .readbyte               = ts72xx_rtc_readbyte,
+        .writebyte              = ts72xx_rtc_writebyte,
 };
 
 static struct platform_device ts72xx_rtc_device = {
diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index 2e3b643a4dc4..1649a175a206 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -5,17 +5,34 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/acpi.h>
+
 #include <asm/pci-direct.h>
 #include <asm/acpi.h>
 #include <asm/apic.h>
 
+#ifdef CONFIG_ACPI
+
+static int nvidia_hpet_detected __initdata;
+
+static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
+{
+        nvidia_hpet_detected = 1;
+        return 0;
+}
+#endif
+
 static int __init check_bridge(int vendor, int device)
 {
 #ifdef CONFIG_ACPI
-        /* According to Nvidia all timer overrides are bogus. Just ignore
-           them all. */
+        /* According to Nvidia all timer overrides are bogus unless HPET
+           is enabled. */
         if (vendor == PCI_VENDOR_ID_NVIDIA) {
-                acpi_skip_timer_override = 1;
+                nvidia_hpet_detected = 0;
+                acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
+                if (nvidia_hpet_detected == 0) {
+                        acpi_skip_timer_override = 1;
+                }
         }
 #endif
         if (vendor == PCI_VENDOR_ID_ATI && timer_over_8254 == 1) {
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 846e1639ef7c..dd6b0e3386ce 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1547,15 +1547,18 @@ void __init setup_arch(char **cmdline_p)
         if (efi_enabled)
                 efi_map_memmap();
 
-#ifdef CONFIG_X86_IO_APIC
-        check_acpi_pci();       /* Checks more than just ACPI actually */
-#endif
-
 #ifdef CONFIG_ACPI
         /*
          * Parse the ACPI tables for possible boot-time SMP configuration.
          */
         acpi_boot_table_init();
+#endif
+
+#ifdef CONFIG_X86_IO_APIC
+        check_acpi_pci();       /* Checks more than just ACPI actually */
+#endif
+
+#ifdef CONFIG_ACPI
         acpi_boot_init();
 
 #if defined(CONFIG_SMP) && defined(CONFIG_X86_PC)
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 0de3ea938830..9cc7031b7151 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -271,6 +271,18 @@ __setup("enable_8254_timer", setup_enable_8254_timer);
 #include <linux/pci_ids.h>
 #include <linux/pci.h>
 
+
+#ifdef CONFIG_ACPI
+
+static int nvidia_hpet_detected __initdata;
+
+static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
+{
+        nvidia_hpet_detected = 1;
+        return 0;
+}
+#endif
+
 /* Temporary Hack. Nvidia and VIA boards currently only work with IO-APIC
    off. Check for an Nvidia or VIA PCI bridge and turn it off.
    Use pci direct infrastructure because this runs before the PCI subsystem. 
@@ -317,11 +329,19 @@ void __init check_ioapic(void)
                                         return;
                                 case PCI_VENDOR_ID_NVIDIA:
 #ifdef CONFIG_ACPI
-                                        /* All timer overrides on Nvidia
-                                           seem to be wrong. Skip them. */
-                                        acpi_skip_timer_override = 1;
-                                        printk(KERN_INFO 
-             "Nvidia board detected. Ignoring ACPI timer override.\n");
+                                        /*
+                                         * All timer overrides on Nvidia are
+                                         * wrong unless HPET is enabled.
+                                         */
+                                        nvidia_hpet_detected = 0;
+                                        acpi_table_parse(ACPI_HPET,
+                                                        nvidia_hpet_check);
+                                        if (nvidia_hpet_detected == 0) {
+                                                acpi_skip_timer_override = 1;
+                                                printk(KERN_INFO "Nvidia board "
+                                                    "detected. Ignoring ACPI "
+                                                    "timer override.\n");
+                                        }
 #endif
                                         /* RED-PEN skip them on mptables too? */
                                         return;
diff --git a/block/as-iosched.c b/block/as-iosched.c
index e25a5d79ab27..a7caf35ca0c2 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -1648,17 +1648,17 @@ static void as_exit_queue(elevator_t *e)
  * initialize elevator private data (as_data), and alloc a arq for
  * each request on the free lists
  */
-static int as_init_queue(request_queue_t *q, elevator_t *e)
+static void *as_init_queue(request_queue_t *q, elevator_t *e)
 {
         struct as_data *ad;
         int i;
 
         if (!arq_pool)
-                return -ENOMEM;
+                return NULL;
 
         ad = kmalloc_node(sizeof(*ad), GFP_KERNEL, q->node);
         if (!ad)
-                return -ENOMEM;
+                return NULL;
         memset(ad, 0, sizeof(*ad));
 
         ad->q = q; /* Identify what queue the data belongs to */
@@ -1667,7 +1667,7 @@ static int as_init_queue(request_queue_t *q, elevator_t *e)
                                 GFP_KERNEL, q->node);
         if (!ad->hash) {
                 kfree(ad);
-                return -ENOMEM;
+                return NULL;
         }
 
         ad->arq_pool = mempool_create_node(BLKDEV_MIN_RQ, mempool_alloc_slab,
@@ -1675,7 +1675,7 @@ static int as_init_queue(request_queue_t *q, elevator_t *e)
         if (!ad->arq_pool) {
                 kfree(ad->hash);
                 kfree(ad);
-                return -ENOMEM;
+                return NULL;
         }
 
         /* anticipatory scheduling helpers */
@@ -1696,14 +1696,13 @@ static int as_init_queue(request_queue_t *q, elevator_t *e)
         ad->antic_expire = default_antic_expire;
         ad->batch_expire[REQ_SYNC] = default_read_batch_expire;
         ad->batch_expire[REQ_ASYNC] = default_write_batch_expire;
-        e->elevator_data = ad;
 
         ad->current_batch_expires = jiffies + ad->batch_expire[REQ_SYNC];
         ad->write_batch_count = ad->batch_expire[REQ_ASYNC] / 10;
         if (ad->write_batch_count < 2)
                 ad->write_batch_count = 2;
 
-        return 0;
+        return ad;
 }
 
 /*
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 8e9d84825e1c..a46d030e092a 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2251,14 +2251,14 @@ static void cfq_exit_queue(elevator_t *e)
         kfree(cfqd);
 }
 
-static int cfq_init_queue(request_queue_t *q, elevator_t *e)
+static void *cfq_init_queue(request_queue_t *q, elevator_t *e)
 {
         struct cfq_data *cfqd;
         int i;
 
         cfqd = kmalloc(sizeof(*cfqd), GFP_KERNEL);
         if (!cfqd)
-                return -ENOMEM;
+                return NULL;
 
         memset(cfqd, 0, sizeof(*cfqd));
 
@@ -2288,8 +2288,6 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
         for (i = 0; i < CFQ_QHASH_ENTRIES; i++)
                 INIT_HLIST_HEAD(&cfqd->cfq_hash[i]);
 
-        e->elevator_data = cfqd;
-
         cfqd->queue = q;
 
         cfqd->max_queued = q->nr_requests / 4;
@@ -2316,14 +2314,14 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
         cfqd->cfq_slice_async_rq = cfq_slice_async_rq;
         cfqd->cfq_slice_idle = cfq_slice_idle;
 
-        return 0;
+        return cfqd;
 out_crqpool:
         kfree(cfqd->cfq_hash);
 out_cfqhash:
         kfree(cfqd->crq_hash);
 out_crqhash:
         kfree(cfqd);
-        return -ENOMEM;
+        return NULL;
 }
 
 static void cfq_slab_kill(void)
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 399fa1e60e1f..3bd0415a9828 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -613,24 +613,24 @@ static void deadline_exit_queue(elevator_t *e)
  * initialize elevator private data (deadline_data), and alloc a drq for
  * each request on the free lists
  */
-static int deadline_init_queue(request_queue_t *q, elevator_t *e)
+static void *deadline_init_queue(request_queue_t *q, elevator_t *e)
 {
         struct deadline_data *dd;
         int i;
 
         if (!drq_pool)
-                return -ENOMEM;
+                return NULL;
 
         dd = kmalloc_node(sizeof(*dd), GFP_KERNEL, q->node);
         if (!dd)
-                return -ENOMEM;
+                return NULL;
         memset(dd, 0, sizeof(*dd));
 
         dd->hash = kmalloc_node(sizeof(struct list_head)*DL_HASH_ENTRIES,
                                 GFP_KERNEL, q->node);
         if (!dd->hash) {
                 kfree(dd);
-                return -ENOMEM;
+                return NULL;
         }
 
         dd->drq_pool = mempool_create_node(BLKDEV_MIN_RQ, mempool_alloc_slab,
@@ -638,7 +638,7 @@ static int deadline_init_queue(request_queue_t *q, elevator_t *e)
         if (!dd->drq_pool) {
                 kfree(dd->hash);
                 kfree(dd);
-                return -ENOMEM;
+                return NULL;
         }
 
         for (i = 0; i < DL_HASH_ENTRIES; i++)
@@ -653,8 +653,7 @@ static int deadline_init_queue(request_queue_t *q, elevator_t *e)
         dd->writes_starved = writes_starved;
         dd->front_merges = 1;
         dd->fifo_batch = fifo_batch;
-        e->elevator_data = dd;
-        return 0;
+        return dd;
 }
 
 static void deadline_put_request(request_queue_t *q, struct request *rq)
diff --git a/block/elevator.c b/block/elevator.c
index 8768a367fdde..a0afdd317cef 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -121,16 +121,16 @@ static struct elevator_type *elevator_get(const char *name)
         return e;
 }
 
-static int elevator_attach(request_queue_t *q, struct elevator_queue *eq)
+static void *elevator_init_queue(request_queue_t *q, struct elevator_queue *eq)
 {
-        int ret = 0;
+        return eq->ops->elevator_init_fn(q, eq);
+}
 
+static void elevator_attach(request_queue_t *q, struct elevator_queue *eq,
+                           void *data)
+{
         q->elevator = eq;
-
-        if (eq->ops->elevator_init_fn)
-                ret = eq->ops->elevator_init_fn(q, eq);
-
-        return ret;
+        eq->elevator_data = data;
 }
 
 static char chosen_elevator[16];
@@ -181,6 +181,7 @@ int elevator_init(request_queue_t *q, char *name)
         struct elevator_type *e = NULL;
         struct elevator_queue *eq;
         int ret = 0;
+        void *data;
 
         INIT_LIST_HEAD(&q->queue_head);
         q->last_merge = NULL;
@@ -202,10 +203,13 @@ int elevator_init(request_queue_t *q, char *name)
         if (!eq)
                 return -ENOMEM;
 
-        ret = elevator_attach(q, eq);
-        if (ret)
+        data = elevator_init_queue(q, eq);
+        if (!data) {
                 kobject_put(&eq->kobj);
+                return -ENOMEM;
+        }
 
+        elevator_attach(q, eq, data);
         return ret;
 }
 
@@ -722,13 +726,16 @@ int elv_register_queue(struct request_queue *q)
         return error;
 }
 
+static void __elv_unregister_queue(elevator_t *e)
+{
+        kobject_uevent(&e->kobj, KOBJ_REMOVE);
+        kobject_del(&e->kobj);
+}
+
 void elv_unregister_queue(struct request_queue *q)
 {
-        if (q) {
-                elevator_t *e = q->elevator;
-                kobject_uevent(&e->kobj, KOBJ_REMOVE);
-                kobject_del(&e->kobj);
-        }
+        if (q)
+                __elv_unregister_queue(q->elevator);
 }
 
 int elv_register(struct elevator_type *e)
@@ -780,6 +787,7 @@ EXPORT_SYMBOL_GPL(elv_unregister);
 static int elevator_switch(request_queue_t *q, struct elevator_type *new_e)
 {
         elevator_t *old_elevator, *e;
+        void *data;
 
         /*
          * Allocate new elevator
@@ -788,6 +796,12 @@ static int elevator_switch(request_queue_t *q, struct elevator_type *new_e)
         if (!e)
                 return 0;
 
+        data = elevator_init_queue(q, e);
+        if (!data) {
+                kobject_put(&e->kobj);
+                return 0;
+        }
+
         /*
          * Turn on BYPASS and drain all requests w/ elevator private data
          */
@@ -806,19 +820,19 @@ static int elevator_switch(request_queue_t *q, struct elevator_type *new_e)
                 elv_drain_elevator(q);
         }
 
-        spin_unlock_irq(q->queue_lock);
-
         /*
-         * unregister old elevator data
+         * Remember old elevator.
          */
-        elv_unregister_queue(q);
         old_elevator = q->elevator;
 
         /*
          * attach and start new elevator
          */
-        if (elevator_attach(q, e))
-                goto fail;
+        elevator_attach(q, e, data);
+
+        spin_unlock_irq(q->queue_lock);
+
+        __elv_unregister_queue(old_elevator);
 
         if (elv_register_queue(q))
                 goto fail_register;
@@ -837,7 +851,6 @@ fail_register:
          */
         elevator_exit(e);
         e = NULL;
-fail:
         q->elevator = old_elevator;
         elv_register_queue(q);
         clear_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags);
diff --git a/block/noop-iosched.c b/block/noop-iosched.c
index f370e4a7fe6d..56a7c620574f 100644
--- a/block/noop-iosched.c
+++ b/block/noop-iosched.c
@@ -65,16 +65,15 @@ noop_latter_request(request_queue_t *q, struct request *rq)
         return list_entry(rq->queuelist.next, struct request, queuelist);
 }
 
-static int noop_init_queue(request_queue_t *q, elevator_t *e)
+static void *noop_init_queue(request_queue_t *q, elevator_t *e)
 {
         struct noop_data *nd;
 
         nd = kmalloc(sizeof(*nd), GFP_KERNEL);
         if (!nd)
-                return -ENOMEM;
+                return NULL;
         INIT_LIST_HEAD(&nd->queue);
-        e->elevator_data = nd;
-        return 0;
+        return nd;
 }
 
 static void noop_exit_queue(elevator_t *e)
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 953eb8c171d6..47ba1a79adcd 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -1745,7 +1745,7 @@ static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
                                         fbcon_redraw_move(vc, p, 0, t, count);
                                 ypan_up_redraw(vc, t, count);
                                 if (vc->vc_rows - b > 0)
-                                        fbcon_redraw_move(vc, p, b - count,
+                                        fbcon_redraw_move(vc, p, b,
                                                           vc->vc_rows - b, b);
                         } else
                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 85d166cdcae4..b55b4ea9a676 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -67,12 +67,13 @@ static struct inode *debugfs_get_inode(struct super_block *sb, int mode, dev_t d
 static int debugfs_mknod(struct inode *dir, struct dentry *dentry,
                          int mode, dev_t dev)
 {
-        struct inode *inode = debugfs_get_inode(dir->i_sb, mode, dev);
+        struct inode *inode;
         int error = -EPERM;
 
         if (dentry->d_inode)
                 return -EEXIST;
 
+        inode = debugfs_get_inode(dir->i_sb, mode, dev);
         if (inode) {
                 d_instantiate(dentry, inode);
                 dget(dentry);
diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h
index 40c25e166a9b..1802775568b9 100644
--- a/include/asm-s390/futex.h
+++ b/include/asm-s390/futex.h
@@ -11,23 +11,24 @@
 #define __futex_atomic_fixup \
                      ".section __ex_table,\"a\"\n"                      \
                      "   .align 4\n"                                    \
-                     "   .long  0b,2b,1b,2b\n"                          \
+                     "   .long  0b,4b,2b,4b,3b,4b\n"                    \
                      ".previous"
 #else /* __s390x__ */
 #define __futex_atomic_fixup \
                      ".section __ex_table,\"a\"\n"                      \
                      "   .align 8\n"                                    \
-                     "   .quad  0b,2b,1b,2b\n"                          \
+                     "   .quad  0b,4b,2b,4b,3b,4b\n"                    \
                      ".previous"
 #endif /* __s390x__ */
 
 #define __futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg)      \
-        asm volatile("   l   %1,0(%6)\n"                                \
-                     "0: " insn                                         \
-                     "   cs  %1,%2,0(%6)\n"                             \
-                     "1: jl  0b\n"                                      \
+        asm volatile("   sacf 256\n"                                    \
+                     "0: l   %1,0(%6)\n"                                \
+                     "1: " insn                                         \
+                     "2: cs  %1,%2,0(%6)\n"                             \
+                     "3: jl  1b\n"                                      \
                      "   lhi %0,0\n"                                    \
-                     "2:\n"                                             \
+                     "4: sacf 0\n"                                      \
                      __futex_atomic_fixup                               \
                      : "=d" (ret), "=&d" (oldval), "=&d" (newval),      \
                        "=m" (*uaddr)                                    \
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index ad133fcfb239..1713ace808bf 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -21,7 +21,7 @@ typedef void (elevator_put_req_fn) (request_queue_t *, struct request *);
 typedef void (elevator_activate_req_fn) (request_queue_t *, struct request *);
 typedef void (elevator_deactivate_req_fn) (request_queue_t *, struct request *);
 
-typedef int (elevator_init_fn) (request_queue_t *, elevator_t *);
+typedef void *(elevator_init_fn) (request_queue_t *, elevator_t *);
 typedef void (elevator_exit_fn) (elevator_t *);
 
 struct elevator_ops
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 6a7621b2b12b..f5fdca1d67e6 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -36,6 +36,7 @@
 #include <linux/nodemask.h>
 
 struct vm_area_struct;
+struct mm_struct;
 
 #ifdef CONFIG_NUMA