Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

34 files changed, 230 insertions, 458 deletions

diff --git a/arch/um/.gitignore b/arch/um/.gitignore
new file mode 100644
index 000000000000..a73d3a1cc746
--- /dev/null
+++ b/arch/um/.gitignore
@@ -0,0 +1,3 @@
+kernel/config.c
+kernel/config.tmp
+kernel/vmlinux.lds
diff --git a/arch/um/Makefile b/arch/um/Makefile
index fc633dbacf84..fab8121d2b32 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -149,6 +149,6 @@ $(SHARED_HEADERS)/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
 
 $(SHARED_HEADERS)/kern_constants.h:
         $(Q)mkdir -p $(dir $@)
-        $(Q)echo '#include "../../../../include/asm/asm-offsets.h"' >$@
+        $(Q)echo '#include "../../../../include/generated/asm-offsets.h"' >$@
 
 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index cf8a97f34518..7a656bd8bd3c 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -6,6 +6,7 @@
 #include "linux/irqreturn.h"
 #include "linux/kd.h"
 #include "linux/sched.h"
+#include "linux/slab.h"
 #include "chan_kern.h"
 #include "irq_kern.h"
 #include "irq_user.h"
@@ -18,10 +19,10 @@ static irqreturn_t line_interrupt(int irq, void *data)
 {
         struct chan *chan = data;
         struct line *line = chan->line;
-        struct tty_struct *tty = line->tty;
+        struct tty_struct *tty;
 
         if (line)
-                chan_interrupt(&line->chan_list, &line->task, tty, irq);
+                chan_interrupt(&line->chan_list, &line->task, line->tty, irq);
         return IRQ_HANDLED;
 }
 
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index e14629c87de4..de317d0c3294 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -6,6 +6,7 @@
 
 #include <linux/console.h>
 #include <linux/ctype.h>
+#include <linux/string.h>
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/mm.h>
@@ -124,50 +125,36 @@ void mconsole_log(struct mc_request *req)
 void mconsole_proc(struct mc_request *req)
 {
         struct nameidata nd;
-        struct file_system_type *proc;
-        struct super_block *super;
+        struct vfsmount *mnt = current->nsproxy->pid_ns->proc_mnt;
         struct file *file;
         int n, err;
         char *ptr = req->request.data, *buf;
+        mm_segment_t old_fs = get_fs();
 
         ptr += strlen("proc");
-        while (isspace(*ptr)) ptr++;
+        ptr = skip_spaces(ptr);
 
-        proc = get_fs_type("proc");
-        if (proc == NULL) {
-                mconsole_reply(req, "procfs not registered", 1, 0);
+        err = vfs_path_lookup(mnt->mnt_root, mnt, ptr, LOOKUP_FOLLOW, &nd);
+        if (err) {
+                mconsole_reply(req, "Failed to look up file", 1, 0);
                 goto out;
         }
 
-        super = (*proc->get_sb)(proc, 0, NULL, NULL);
-        put_filesystem(proc);
-        if (super == NULL) {
-                mconsole_reply(req, "Failed to get procfs superblock", 1, 0);
+        err = may_open(&nd.path, MAY_READ, O_RDONLY);
+        if (result) {
+                mconsole_reply(req, "Failed to open file", 1, 0);
+                path_put(&nd.path);
                 goto out;
         }
-        up_write(&super->s_umount);
-
-        nd.path.dentry = super->s_root;
-        nd.path.mnt = NULL;
-        nd.flags = O_RDONLY + 1;
-        nd.last_type = LAST_ROOT;
-
-        /* START: it was experienced that the stability problems are closed
-         * if commenting out these two calls + the below read cycle. To
-         * make UML crash again, it was enough to readd either one.*/
-        err = link_path_walk(ptr, &nd);
-        if (err) {
-                mconsole_reply(req, "Failed to look up file", 1, 0);
-                goto out_kill;
-        }
 
         file = dentry_open(nd.path.dentry, nd.path.mnt, O_RDONLY,
                            current_cred());
+        err = PTR_ERR(file);
         if (IS_ERR(file)) {
                 mconsole_reply(req, "Failed to open file", 1, 0);
-                goto out_kill;
+                path_put(&nd.path);
+                goto out;
         }
-        /*END*/
 
         buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
         if (buf == NULL) {
@@ -175,10 +162,13 @@ void mconsole_proc(struct mc_request *req)
                 goto out_fput;
         }
 
-        if ((file->f_op != NULL) && (file->f_op->read != NULL)) {
+        if (file->f_op->read) {
                 do {
-                        n = (*file->f_op->read)(file, buf, PAGE_SIZE - 1,
-                                                &file->f_pos);
+                        loff_t pos;
+                        set_fs(KERNEL_DS);
+                        n = vfs_read(file, buf, PAGE_SIZE - 1, &pos);
+                        file_pos_write(file, pos);
+                        set_fs(old_fs);
                         if (n >= 0) {
                                 buf[n] = '\0';
                                 mconsole_reply(req, buf, 0, (n > 0));
@@ -196,8 +186,6 @@ void mconsole_proc(struct mc_request *req)
         kfree(buf);
  out_fput:
         fput(file);
- out_kill:
-        deactivate_super(super);
  out: ;
 }
 #endif
@@ -212,8 +200,7 @@ void mconsole_proc(struct mc_request *req)
         char *ptr = req->request.data;
 
         ptr += strlen("proc");
-        while (isspace(*ptr))
-                ptr++;
+        ptr = skip_spaces(ptr);
         snprintf(path, sizeof(path), "/proc/%s", ptr);
 
         fd = sys_open(path, 0, 0);
@@ -560,8 +547,7 @@ void mconsole_config(struct mc_request *req)
         int err;
 
         ptr += strlen("config");
-        while (isspace(*ptr))
-                ptr++;
+        ptr = skip_spaces(ptr);
         dev = mconsole_find_dev(ptr);
         if (dev == NULL) {
                 mconsole_reply(req, "Bad configuration option", 1, 0);
@@ -588,7 +574,7 @@ void mconsole_remove(struct mc_request *req)
         int err, start, end, n;
 
         ptr += strlen("remove");
-        while (isspace(*ptr)) ptr++;
+        ptr = skip_spaces(ptr);
         dev = mconsole_find_dev(ptr);
         if (dev == NULL) {
                 mconsole_reply(req, "Bad remove option", 1, 0);
@@ -712,7 +698,7 @@ void mconsole_sysrq(struct mc_request *req)
         char *ptr = req->request.data;
 
         ptr += strlen("sysrq");
-        while (isspace(*ptr)) ptr++;
+        ptr = skip_spaces(ptr);
 
         /*
          * With 'b', the system will shut down without a chance to reply,
@@ -757,8 +743,7 @@ void mconsole_stack(struct mc_request *req)
          */
 
         ptr += strlen("stack");
-        while (isspace(*ptr))
-                ptr++;
+        ptr = skip_spaces(ptr);
 
         /*
          * Should really check for multiple pids or reject bad args here
@@ -833,8 +818,8 @@ static int __init mconsole_init(void)
 
 __initcall(mconsole_init);
 
-static int write_proc_mconsole(struct file *file, const char __user *buffer,
-                               unsigned long count, void *data)
+static ssize_t mconsole_proc_write(struct file *file,
+                const char __user *buffer, size_t count, loff_t *pos)
 {
         char *buf;
 
@@ -855,6 +840,11 @@ static int write_proc_mconsole(struct file *file, const char __user *buffer,
         return count;
 }
 
+static const struct file_operations mconsole_proc_fops = {
+        .owner          = THIS_MODULE,
+        .write          = mconsole_proc_write,
+};
+
 static int create_proc_mconsole(void)
 {
         struct proc_dir_entry *ent;
@@ -862,15 +852,12 @@ static int create_proc_mconsole(void)
         if (notify_socket == NULL)
                 return 0;
 
-        ent = create_proc_entry("mconsole", S_IFREG | 0200, NULL);
+        ent = proc_create("mconsole", 0200, NULL, &mconsole_proc_fops);
         if (ent == NULL) {
                 printk(KERN_INFO "create_proc_mconsole : create_proc_entry "
                        "failed\n");
                 return 0;
         }
-
-        ent->read_proc = NULL;
-        ent->write_proc = write_proc_mconsole;
         return 0;
 }
 
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
index eb240323c40a..d22f9e5c0eac 100644
--- a/arch/um/drivers/mmapper_kern.c
+++ b/arch/um/drivers/mmapper_kern.c
@@ -16,7 +16,7 @@
 #include <linux/miscdevice.h>
 #include <linux/module.h>
 #include <linux/mm.h>
-#include <linux/smp_lock.h>
+
 #include <asm/uaccess.h>
 #include "mem_user.h"
 
@@ -78,7 +78,6 @@ out:
 
 static int mmapper_open(struct inode *inode, struct file *file)
 {
-        cycle_kernel_lock();
         return 0;
 }
 
@@ -115,18 +114,16 @@ static int __init mmapper_init(void)
         v_buf = (char *) find_iomem("mmapper", &mmapper_size);
         if (mmapper_size == 0) {
                 printk(KERN_ERR "mmapper_init - find_iomem failed\n");
-                goto out;
+                return -ENODEV;
         }
+        p_buf = __pa(v_buf);
 
         err = misc_register(&mmapper_dev);
         if (err) {
                 printk(KERN_ERR "mmapper - misc_register failed, err = %d\n",
                        err);
-                goto out;
+                return err;;
         }
-
-        p_buf = __pa(v_buf);
-out:
         return 0;
 }
 
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
index a74245ae3a84..f05372694233 100644
--- a/arch/um/drivers/net_kern.c
+++ b/arch/um/drivers/net_kern.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include <linux/rtnetlink.h>
 #include <linux/skbuff.h>
+#include <linux/slab.h>
 #include <linux/spinlock.h>
 #include "init.h"
 #include "irq_kern.h"
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
index 4ebc8a34738f..a11573be0961 100644
--- a/arch/um/drivers/port_kern.c
+++ b/arch/um/drivers/port_kern.c
@@ -7,6 +7,7 @@
 #include "linux/interrupt.h"
 #include "linux/list.h"
 #include "linux/mutex.h"
+#include "linux/slab.h"
 #include "linux/workqueue.h"
 #include "asm/atomic.h"
 #include "init.h"
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index 6eabb7022a2d..4949044773ba 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -7,7 +7,6 @@
  * of the GNU General Public License, incorporated herein by reference.
  */
 #include <linux/sched.h>
-#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/interrupt.h>
@@ -34,8 +33,6 @@ static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
 
 static int rng_dev_open (struct inode *inode, struct file *filp)
 {
-        cycle_kernel_lock();
-
         /* enforce read-only access to this chrdev */
         if ((filp->f_mode & FMODE_READ) == 0)
                 return -EINVAL;
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 635d16d90a80..da992a3ad6b7 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -27,9 +27,11 @@
 #include "linux/init.h"
 #include "linux/cdrom.h"
 #include "linux/proc_fs.h"
+#include "linux/seq_file.h"
 #include "linux/ctype.h"
 #include "linux/capability.h"
 #include "linux/mm.h"
+#include "linux/slab.h"
 #include "linux/vmalloc.h"
 #include "linux/blkpg.h"
 #include "linux/genhd.h"
@@ -200,23 +202,25 @@ static void make_proc_ide(void)
         proc_ide = proc_mkdir("ide0", proc_ide_root);
 }
 
-static int proc_ide_read_media(char *page, char **start, off_t off, int count,
-                               int *eof, void *data)
+static int fake_ide_media_proc_show(struct seq_file *m, void *v)
 {
-        int len;
-
-        strcpy(page, "disk\n");
-        len = strlen("disk\n");
-        len -= off;
-        if (len < count){
-                *eof = 1;
-                if (len <= 0) return 0;
-        }
-        else len = count;
-        *start = page + off;
-        return len;
+        seq_puts(m, "disk\n");
+        return 0;
+}
+
+static int fake_ide_media_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, fake_ide_media_proc_show, NULL);
 }
 
+static const struct file_operations fake_ide_media_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = fake_ide_media_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 static void make_ide_entries(const char *dev_name)
 {
         struct proc_dir_entry *dir, *ent;
@@ -227,11 +231,8 @@ static void make_ide_entries(const char *dev_name)
         dir = proc_mkdir(dev_name, proc_ide);
         if(!dir) return;
 
-        ent = create_proc_entry("media", S_IFREG|S_IRUGO, dir);
+        ent = proc_create("media", S_IRUGO, dir, &fake_ide_media_proc_fops);
         if(!ent) return;
-        ent->data = NULL;
-        ent->read_proc = proc_ide_read_media;
-        ent->write_proc = NULL;
         snprintf(name, sizeof(name), "ide0/%s", dev_name);
         proc_symlink(dev_name, proc_ide_root, name);
 }
@@ -747,7 +748,7 @@ static int ubd_open_dev(struct ubd *ubd_dev)
         ubd_dev->fd = fd;
 
         if(ubd_dev->cow.file != NULL){
-                blk_queue_max_sectors(ubd_dev->queue, 8 * sizeof(long));
+                blk_queue_max_hw_sectors(ubd_dev->queue, 8 * sizeof(long));
 
                 err = -ENOMEM;
                 ubd_dev->cow.bitmap = vmalloc(ubd_dev->cow.bitmap_len);
@@ -849,7 +850,7 @@ static int ubd_add(int n, char **error_out)
         }
         ubd_dev->queue->queuedata = ubd_dev;
 
-        blk_queue_max_hw_segments(ubd_dev->queue, MAX_SG);
+        blk_queue_max_segments(ubd_dev->queue, MAX_SG);
         err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);
         if(err){
                 *error_out = "Failed to register device";
diff --git a/arch/um/include/asm/asm-offsets.h b/arch/um/include/asm/asm-offsets.h
new file mode 100644
index 000000000000..d370ee36a182
--- /dev/null
+++ b/arch/um/include/asm/asm-offsets.h
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
index 378de4bbf49f..b948c14a7867 100644
--- a/arch/um/include/asm/dma-mapping.h
+++ b/arch/um/include/asm/dma-mapping.h
@@ -104,14 +104,6 @@ dma_get_cache_alignment(void)
 }
 
 static inline void
-dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
-                      unsigned long offset, size_t size,
-                      enum dma_data_direction direction)
-{
-        BUG();
-}
-
-static inline void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                enum dma_data_direction direction)
 {
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 9ce3f165111a..a9f7251b4a8d 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -345,7 +345,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 struct mm_struct;
 extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
 
-#define update_mmu_cache(vma,address,pte) do ; while (0)
+#define update_mmu_cache(vma,address,ptep) do ; while (0)
 
 /* Encode and de-code a swap entry */
 #define __swp_type(x)                   (((x).val >> 4) & 0x3f)
diff --git a/arch/um/include/asm/ptrace-generic.h b/arch/um/include/asm/ptrace-generic.h
index 6c8899013c92..2cd899f75a3c 100644
--- a/arch/um/include/asm/ptrace-generic.h
+++ b/arch/um/include/asm/ptrace-generic.h
@@ -16,6 +16,8 @@ struct pt_regs {
         struct uml_pt_regs regs;
 };
 
+#define arch_has_single_step()  (1)
+
 #define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS }
 
 #define PT_REGS_IP(r) UPT_IP(&(r)->regs)
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
index fda30d21fb90..97974c1bdd12 100644
--- a/arch/um/kernel/exec.c
+++ b/arch/um/kernel/exec.c
@@ -8,6 +8,7 @@
 #include "linux/smp_lock.h"
 #include "linux/ptrace.h"
 #include "linux/sched.h"
+#include "linux/slab.h"
 #include "asm/current.h"
 #include "asm/processor.h"
 #include "asm/uaccess.h"
diff --git a/arch/um/kernel/exitcode.c b/arch/um/kernel/exitcode.c
index 6540d2c9fbb7..829df49dee99 100644
--- a/arch/um/kernel/exitcode.c
+++ b/arch/um/kernel/exitcode.c
@@ -6,7 +6,9 @@
 #include <linux/ctype.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/types.h>
 #include <asm/uaccess.h>
 
@@ -16,30 +18,26 @@
  */
 int uml_exitcode = 0;
 
-static int read_proc_exitcode(char *page, char **start, off_t off,
-                              int count, int *eof, void *data)
+static int exitcode_proc_show(struct seq_file *m, void *v)
 {
-        int len, val;
+        int val;
 
         /*
          * Save uml_exitcode in a local so that we don't need to guarantee
          * that sprintf accesses it atomically.
          */
         val = uml_exitcode;
-        len = sprintf(page, "%d\n", val);
-        len -= off;
-        if (len <= off+count)
-                *eof = 1;
-        *start = page + off;
-        if (len > count)
-                len = count;
-        if (len < 0)
-                len = 0;
-        return len;
+        seq_printf(m, "%d\n", val);
+        return 0;
+}
+
+static int exitcode_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, exitcode_proc_show, NULL);
 }
 
-static int write_proc_exitcode(struct file *file, const char __user *buffer,
-                               unsigned long count, void *data)
+static ssize_t exitcode_proc_write(struct file *file,
+                const char __user *buffer, size_t count, loff_t *pos)
 {
         char *end, buf[sizeof("nnnnn\0")];
         int tmp;
@@ -55,20 +53,25 @@ static int write_proc_exitcode(struct file *file, const char __user *buffer,
         return count;
 }
 
+static const struct file_operations exitcode_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = exitcode_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = exitcode_proc_write,
+};
+
 static int make_proc_exitcode(void)
 {
         struct proc_dir_entry *ent;
 
-        ent = create_proc_entry("exitcode", 0600, NULL);
+        ent = proc_create("exitcode", 0600, NULL, &exitcode_proc_fops);
         if (ent == NULL) {
                 printk(KERN_WARNING "make_proc_exitcode : Failed to register "
                        "/proc/exitcode\n");
                 return 0;
         }
-
-        ent->read_proc = read_proc_exitcode;
-        ent->write_proc = write_proc_exitcode;
-
         return 0;
 }
 
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 039270b9b73b..a3f0b04d7101 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -12,6 +12,7 @@
 #include "linux/module.h"
 #include "linux/sched.h"
 #include "linux/seq_file.h"
+#include "linux/slab.h"
 #include "as-layout.h"
 #include "kern_util.h"
 #include "os.h"
@@ -34,7 +35,7 @@ int show_interrupts(struct seq_file *p, void *v)
         }
 
         if (i < NR_IRQS) {
-                spin_lock_irqsave(&irq_desc[i].lock, flags);
+                raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
                 action = irq_desc[i].action;
                 if (!action)
                         goto skip;
@@ -53,7 +54,7 @@ int show_interrupts(struct seq_file *p, void *v)
 
                 seq_putc(p, '\n');
 skip:
-                spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+                raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
         } else if (i == NR_IRQS)
                 seq_putc(p, '\n');
 
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index a5d5e70cf6f5..8137ccc9635b 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -5,10 +5,10 @@
 
 #include <linux/stddef.h>
 #include <linux/bootmem.h>
-#include <linux/gfp.h>
 #include <linux/highmem.h>
 #include <linux/mm.h>
 #include <linux/swap.h>
+#include <linux/slab.h>
 #include <asm/fixmap.h>
 #include <asm/page.h>
 #include "as-layout.h"
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 4a28a1568d85..fab4371184f6 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -7,13 +7,15 @@
 #include <linux/stddef.h>
 #include <linux/err.h>
 #include <linux/hardirq.h>
-#include <linux/gfp.h>
 #include <linux/mm.h>
+#include <linux/module.h>
 #include <linux/personality.h>
 #include <linux/proc_fs.h>
 #include <linux/ptrace.h>
 #include <linux/random.h>
+#include <linux/slab.h>
 #include <linux/sched.h>
+#include <linux/seq_file.h>
 #include <linux/tick.h>
 #include <linux/threads.h>
 #include <asm/current.h>
@@ -336,16 +338,19 @@ int get_using_sysemu(void)
         return atomic_read(&using_sysemu);
 }
 
-static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data)
+static int sysemu_proc_show(struct seq_file *m, void *v)
 {
-        if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size)
-                /* No overflow */
-                *eof = 1;
+        seq_printf(m, "%d\n", get_using_sysemu());
+        return 0;
+}
 
-        return strlen(buf);
+static int sysemu_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, sysemu_proc_show, NULL);
 }
 
-static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned long count,void *data)
+static ssize_t sysemu_proc_write(struct file *file, const char __user *buf,
+                                 size_t count, loff_t *pos)
 {
         char tmp[2];
 
@@ -358,13 +363,22 @@ static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned
         return count;
 }
 
+static const struct file_operations sysemu_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = sysemu_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .write          = sysemu_proc_write,
+};
+
 int __init make_proc_sysemu(void)
 {
         struct proc_dir_entry *ent;
         if (!sysemu_supported)
                 return 0;
 
-        ent = create_proc_entry("sysemu", 0600, NULL);
+        ent = proc_create("sysemu", 0600, NULL, &sysemu_proc_fops);
 
         if (ent == NULL)
         {
@@ -372,9 +386,6 @@ int __init make_proc_sysemu(void)
                 return 0;
         }
 
-        ent->read_proc  = proc_read_sysemu;
-        ent->write_proc = proc_write_sysemu;
-
         return 0;
 }
 
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
index 8e3d69e4fcb5..484509948ee9 100644
--- a/arch/um/kernel/ptrace.c
+++ b/arch/um/kernel/ptrace.c
@@ -12,16 +12,25 @@
 #endif
 #include "skas_ptrace.h"
 
-static inline void set_singlestepping(struct task_struct *child, int on)
+
+
+void user_enable_single_step(struct task_struct *child)
 {
-        if (on)
-                child->ptrace |= PT_DTRACE;
-        else
-                child->ptrace &= ~PT_DTRACE;
+        child->ptrace |= PT_DTRACE;
         child->thread.singlestep_syscall = 0;
 
 #ifdef SUBARCH_SET_SINGLESTEPPING
-        SUBARCH_SET_SINGLESTEPPING(child, on);
+        SUBARCH_SET_SINGLESTEPPING(child, 1);
+#endif
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+        child->ptrace &= ~PT_DTRACE;
+        child->thread.singlestep_syscall = 0;
+
+#ifdef SUBARCH_SET_SINGLESTEPPING
+        SUBARCH_SET_SINGLESTEPPING(child, 0);
 #endif
 }
 
@@ -30,7 +39,7 @@ static inline void set_singlestepping(struct task_struct *child, int on)
  */
 void ptrace_disable(struct task_struct *child)
 {
-        set_singlestepping(child,0);
+        user_disable_single_step(child);
 }
 
 extern int peek_user(struct task_struct * child, long addr, long data);
@@ -69,53 +78,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                 ret = -EIO;
                 break;
 
-        /* continue and stop at next (return from) syscall */
-        case PTRACE_SYSCALL:
-        /* restart after signal. */
-        case PTRACE_CONT: {
-                ret = -EIO;
-                if (!valid_signal(data))
-                        break;
-
-                set_singlestepping(child, 0);
-                if (request == PTRACE_SYSCALL)
-                        set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                else clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                child->exit_code = data;
-                wake_up_process(child);
-                ret = 0;
-                break;
-        }
-
-/*
- * make the child exit.  Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
-        case PTRACE_KILL: {
-                ret = 0;
-                if (child->exit_state == EXIT_ZOMBIE)   /* already dead */
-                        break;
-
-                set_singlestepping(child, 0);
-                child->exit_code = SIGKILL;
-                wake_up_process(child);
-                break;
-        }
-
-        case PTRACE_SINGLESTEP: {  /* set the trap flag. */
-                ret = -EIO;
-                if (!valid_signal(data))
-                        break;
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                set_singlestepping(child, 1);
-                child->exit_code = data;
-                /* give it a chance to run. */
-                wake_up_process(child);
-                ret = 0;
-                break;
-        }
-
 #ifdef PTRACE_GETREGS
         case PTRACE_GETREGS: { /* Get all gp regs from the child. */
                 if (!access_ok(VERIFY_WRITE, p, MAX_REG_OFFSET)) {
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 00197d3d21ec..869bec9f2516 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -4,6 +4,7 @@
  */
 
 #include "linux/sched.h"
+#include "linux/slab.h"
 #include "kern_util.h"
 #include "os.h"
 #include "skas.h"
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 8bfd1e905812..3d099f974785 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -5,6 +5,7 @@
 
 #include "linux/mm.h"
 #include "linux/sched.h"
+#include "linux/slab.h"
 #include "asm/pgalloc.h"
 #include "asm/pgtable.h"
 #include "as-layout.h"
diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c
index a4625c7b2bf9..4393173923f5 100644
--- a/arch/um/kernel/syscall.c
+++ b/arch/um/kernel/syscall.c
@@ -8,6 +8,7 @@
 #include "linux/mm.h"
 #include "linux/sched.h"
 #include "linux/utsname.h"
+#include "linux/syscalls.h"
 #include "asm/current.h"
 #include "asm/mman.h"
 #include "asm/uaccess.h"
@@ -37,31 +38,6 @@ long sys_vfork(void)
         return ret;
 }
 
-/* common code for old and new mmaps */
-long sys_mmap2(unsigned long addr, unsigned long len,
-               unsigned long prot, unsigned long flags,
-               unsigned long fd, unsigned long pgoff)
-{
-        long error = -EBADF;
-        struct file * file = NULL;
-
-        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-        if (!(flags & MAP_ANONYMOUS)) {
-                file = fget(fd);
-                if (!file)
-                        goto out;
-        }
-
-        down_write(&current->mm->mmap_sem);
-        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
-        up_write(&current->mm->mmap_sem);
-
-        if (file)
-                fput(file);
- out:
-        return error;
-}
-
 long old_mmap(unsigned long addr, unsigned long len,
               unsigned long prot, unsigned long flags,
               unsigned long fd, unsigned long offset)
@@ -70,56 +46,11 @@ long old_mmap(unsigned long addr, unsigned long len,
         if (offset & ~PAGE_MASK)
                 goto out;
 
-        err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+        err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
  out:
         return err;
 }
 
-long sys_uname(struct old_utsname __user * name)
-{
-        long err;
-        if (!name)
-                return -EFAULT;
-        down_read(&uts_sem);
-        err = copy_to_user(name, utsname(), sizeof (*name));
-        up_read(&uts_sem);
-        return err?-EFAULT:0;
-}
-
-long sys_olduname(struct oldold_utsname __user * name)
-{
-        long error;
-
-        if (!name)
-                return -EFAULT;
-        if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
-                return -EFAULT;
-
-        down_read(&uts_sem);
-
-        error = __copy_to_user(&name->sysname, &utsname()->sysname,
-                               __OLD_UTS_LEN);
-        error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
-        error |= __copy_to_user(&name->nodename, &utsname()->nodename,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
-        error |= __copy_to_user(&name->release, &utsname()->release,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0, name->release + __OLD_UTS_LEN);
-        error |= __copy_to_user(&name->version, &utsname()->version,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0, name->version + __OLD_UTS_LEN);
-        error |= __copy_to_user(&name->machine, &utsname()->machine,
-                                __OLD_UTS_LEN);
-        error |= __put_user(0, name->machine + __OLD_UTS_LEN);
-
-        up_read(&uts_sem);
-
-        error = error ? -EFAULT : 0;
-
-        return error;
-}
-
 int kernel_execve(const char *filename, char *const argv[], char *const envp[])
 {
         mm_segment_t fs;
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 1b549bca4645..804b28dd0328 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -6,6 +6,8 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
         ptrace_user.o setjmp.o signal.o stub.o stub_segv.o syscalls.o sysrq.o \
         sys_call_table.o tls.o
 
+obj-$(CONFIG_BINFMT_ELF) += elfcore.o
+
 subarch-obj-y = lib/semaphore_32.o lib/string_32.o
 subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o
 subarch-obj-$(CONFIG_MODULES) += kernel/module.o
diff --git a/arch/um/sys-i386/asm/elf.h b/arch/um/sys-i386/asm/elf.h
index d0da9d7c5371..e64cd41d7bab 100644
--- a/arch/um/sys-i386/asm/elf.h
+++ b/arch/um/sys-i386/asm/elf.h
@@ -48,7 +48,6 @@ typedef struct user_i387_struct elf_fpregset_t;
         PT_REGS_EAX(regs) = 0; \
 } while (0)
 
-#define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE 4096
 
 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
@@ -117,47 +116,4 @@ do {								\
         }                                                       \
 } while (0)
 
-/*
- * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
- * extra segments containing the vsyscall DSO contents.  Dumping its
- * contents makes post-mortem fully interpretable later without matching up
- * the same kernel and hardware config to see what PC values meant.
- * Dumping its extra ELF program headers includes all the other information
- * a debugger needs to easily find how the vsyscall DSO was being used.
- */
-#define ELF_CORE_EXTRA_PHDRS                                                  \
-        (vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
-
-#define ELF_CORE_WRITE_EXTRA_PHDRS                                            \
-if ( vsyscall_ehdr ) {                                                        \
-        const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
-        const struct elf_phdr *const phdrp =                                  \
-                (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
-        int i;                                                                \
-        Elf32_Off ofs = 0;                                                    \
-        for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
-                struct elf_phdr phdr = phdrp[i];                              \
-                if (phdr.p_type == PT_LOAD) {                                 \
-                        ofs = phdr.p_offset = offset;                         \
-                        offset += phdr.p_filesz;                              \
-                }                                                             \
-                else                                                          \
-                        phdr.p_offset += ofs;                                 \
-                phdr.p_paddr = 0; /* match other core phdrs */                \
-                DUMP_WRITE(&phdr, sizeof(phdr));                              \
-        }                                                                     \
-}
-#define ELF_CORE_WRITE_EXTRA_DATA                                             \
-if ( vsyscall_ehdr ) {                                                        \
-        const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
-        const struct elf_phdr *const phdrp =                                  \
-                (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
-        int i;                                                                \
-        for (i = 0; i < ehdrp->e_phnum; ++i) {                                \
-                if (phdrp[i].p_type == PT_LOAD)                               \
-                        DUMP_WRITE((void *) phdrp[i].p_vaddr,                 \
-                                   phdrp[i].p_filesz);                        \
-        }                                                                     \
-}
-
 #endif
diff --git a/arch/um/sys-i386/elfcore.c b/arch/um/sys-i386/elfcore.c
new file mode 100644
index 000000000000..6bb49b687c97
--- /dev/null
+++ b/arch/um/sys-i386/elfcore.c
@@ -0,0 +1,83 @@
+#include <linux/elf.h>
+#include <linux/coredump.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+
+#include <asm/elf.h>
+
+
+Elf32_Half elf_core_extra_phdrs(void)
+{
+        return vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0;
+}
+
+int elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
+                               unsigned long limit)
+{
+        if ( vsyscall_ehdr ) {
+                const struct elfhdr *const ehdrp =
+                        (struct elfhdr *) vsyscall_ehdr;
+                const struct elf_phdr *const phdrp =
+                        (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
+                int i;
+                Elf32_Off ofs = 0;
+
+                for (i = 0; i < ehdrp->e_phnum; ++i) {
+                        struct elf_phdr phdr = phdrp[i];
+
+                        if (phdr.p_type == PT_LOAD) {
+                                ofs = phdr.p_offset = offset;
+                                offset += phdr.p_filesz;
+                        } else {
+                                phdr.p_offset += ofs;
+                        }
+                        phdr.p_paddr = 0; /* match other core phdrs */
+                        *size += sizeof(phdr);
+                        if (*size > limit
+                            || !dump_write(file, &phdr, sizeof(phdr)))
+                                return 0;
+                }
+        }
+        return 1;
+}
+
+int elf_core_write_extra_data(struct file *file, size_t *size,
+                              unsigned long limit)
+{
+        if ( vsyscall_ehdr ) {
+                const struct elfhdr *const ehdrp =
+                        (struct elfhdr *) vsyscall_ehdr;
+                const struct elf_phdr *const phdrp =
+                        (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
+                int i;
+
+                for (i = 0; i < ehdrp->e_phnum; ++i) {
+                        if (phdrp[i].p_type == PT_LOAD) {
+                                void *addr = (void *) phdrp[i].p_vaddr;
+                                size_t filesz = phdrp[i].p_filesz;
+
+                                *size += filesz;
+                                if (*size > limit
+                                    || !dump_write(file, addr, filesz))
+                                        return 0;
+                        }
+                }
+        }
+        return 1;
+}
+
+size_t elf_core_extra_data_size(void)
+{
+        if ( vsyscall_ehdr ) {
+                const struct elfhdr *const ehdrp =
+                        (struct elfhdr *)vsyscall_ehdr;
+                const struct elf_phdr *const phdrp =
+                        (const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);
+                int i;
+
+                for (i = 0; i < ehdrp->e_phnum; ++i)
+                        if (phdrp[i].p_type == PT_LOAD)
+                                return (size_t) phdrp[i].p_filesz;
+        }
+        return 0;
+}
diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c
index a4846a84a7be..3f2bf208d884 100644
--- a/arch/um/sys-i386/ldt.c
+++ b/arch/um/sys-i386/ldt.c
@@ -5,6 +5,7 @@
 
 #include <linux/mm.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <asm/unistd.h>
 #include "os.h"
 #include "proc_mm.h"
diff --git a/arch/um/sys-i386/shared/sysdep/syscalls.h b/arch/um/sys-i386/shared/sysdep/syscalls.h
index 905698197e35..05cb796aecb5 100644
--- a/arch/um/sys-i386/shared/sysdep/syscalls.h
+++ b/arch/um/sys-i386/shared/sysdep/syscalls.h
@@ -13,14 +13,8 @@ typedef long syscall_handler_t(struct pt_regs);
  */
 extern syscall_handler_t sys_rt_sigaction;
 
-extern syscall_handler_t old_mmap_i386;
-
 extern syscall_handler_t *sys_call_table[];
 
 #define EXECUTE_SYSCALL(syscall, regs) \
         ((long (*)(struct syscall_args)) \
          (*sys_call_table[syscall]))(SYSCALL_ARGS(&regs->regs))
-
-extern long sys_mmap2(unsigned long addr, unsigned long len,
-                      unsigned long prot, unsigned long flags,
-                      unsigned long fd, unsigned long pgoff);
diff --git a/arch/um/sys-i386/sys_call_table.S b/arch/um/sys-i386/sys_call_table.S
index c6260dd6ebb9..de274071455d 100644
--- a/arch/um/sys-i386/sys_call_table.S
+++ b/arch/um/sys-i386/sys_call_table.S
@@ -7,7 +7,7 @@
 #define sys_vm86old sys_ni_syscall
 #define sys_vm86 sys_ni_syscall
 
-#define old_mmap old_mmap_i386
+#define old_mmap sys_old_mmap
 
 #define ptregs_fork sys_fork
 #define ptregs_execve sys_execve
diff --git a/arch/um/sys-i386/syscalls.c b/arch/um/sys-i386/syscalls.c
index 857ca0b3bdef..70ca357393b8 100644
--- a/arch/um/sys-i386/syscalls.c
+++ b/arch/um/sys-i386/syscalls.c
@@ -12,57 +12,6 @@
 #include "asm/unistd.h"
 
 /*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/i386 didn't use to be able to handle more than
- * 4 system call parameters, so these system calls used a memory
- * block for parameter passing..
- */
-
-struct mmap_arg_struct {
-        unsigned long addr;
-        unsigned long len;
-        unsigned long prot;
-        unsigned long flags;
-        unsigned long fd;
-        unsigned long offset;
-};
-
-extern int old_mmap(unsigned long addr, unsigned long len,
-                    unsigned long prot, unsigned long flags,
-                    unsigned long fd, unsigned long offset);
-
-long old_mmap_i386(struct mmap_arg_struct __user *arg)
-{
-        struct mmap_arg_struct a;
-        int err = -EFAULT;
-
-        if (copy_from_user(&a, arg, sizeof(a)))
-                goto out;
-
-        err = old_mmap(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
- out:
-        return err;
-}
-
-struct sel_arg_struct {
-        unsigned long n;
-        fd_set __user *inp;
-        fd_set __user *outp;
-        fd_set __user *exp;
-        struct timeval __user *tvp;
-};
-
-long old_select(struct sel_arg_struct __user *arg)
-{
-        struct sel_arg_struct a;
-
-        if (copy_from_user(&a, arg, sizeof(a)))
-                return -EFAULT;
-        /* sys_select() does the appropriate kernel locking */
-        return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
-}
-
-/*
  * The prototype on i386 is:
  *
  *     int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr)
@@ -85,92 +34,6 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp,
         return ret;
 }
 
-/*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly.
- */
-long sys_ipc (uint call, int first, int second,
-             int third, void __user *ptr, long fifth)
-{
-        int version, ret;
-
-        version = call >> 16; /* hack for backward compatibility */
-        call &= 0xffff;
-
-        switch (call) {
-        case SEMOP:
-                return sys_semtimedop(first, (struct sembuf __user *) ptr,
-                                      second, NULL);
-        case SEMTIMEDOP:
-                return sys_semtimedop(first, (struct sembuf __user *) ptr,
-                                      second,
-                                      (const struct timespec __user *) fifth);
-        case SEMGET:
-                return sys_semget (first, second, third);
-        case SEMCTL: {
-                union semun fourth;
-                if (!ptr)
-                        return -EINVAL;
-                if (get_user(fourth.__pad, (void __user * __user *) ptr))
-                        return -EFAULT;
-                return sys_semctl (first, second, third, fourth);
-        }
-
-        case MSGSND:
-                return sys_msgsnd (first, (struct msgbuf *) ptr,
-                                   second, third);
-        case MSGRCV:
-                switch (version) {
-                case 0: {
-                        struct ipc_kludge tmp;
-                        if (!ptr)
-                                return -EINVAL;
-
-                        if (copy_from_user(&tmp,
-                                           (struct ipc_kludge *) ptr,
-                                           sizeof (tmp)))
-                                return -EFAULT;
-                        return sys_msgrcv (first, tmp.msgp, second,
-                                           tmp.msgtyp, third);
-                }
-                default:
-                        panic("msgrcv with version != 0");
-                        return sys_msgrcv (first,
-                                           (struct msgbuf *) ptr,
-                                           second, fifth, third);
-                }
-        case MSGGET:
-                return sys_msgget ((key_t) first, second);
-        case MSGCTL:
-                return sys_msgctl (first, second, (struct msqid_ds *) ptr);
-
-        case SHMAT:
-                switch (version) {
-                default: {
-                        ulong raddr;
-                        ret = do_shmat (first, (char *) ptr, second, &raddr);
-                        if (ret)
-                                return ret;
-                        return put_user (raddr, (ulong *) third);
-                }
-                case 1: /* iBCS2 emulator entry point */
-                        if (!segment_eq(get_fs(), get_ds()))
-                                return -EINVAL;
-                        return do_shmat (first, (char *) ptr, second, (ulong *) third);
-                }
-        case SHMDT:
-                return sys_shmdt ((char *)ptr);
-        case SHMGET:
-                return sys_shmget (first, second, third);
-        case SHMCTL:
-                return sys_shmctl (first, second,
-                                   (struct shmid_ds *) ptr);
-        default:
-                return -ENOSYS;
-        }
-}
-
 long sys_sigaction(int sig, const struct old_sigaction __user *act,
                          struct old_sigaction __user *oact)
 {
diff --git a/arch/um/sys-ppc/asm/elf.h b/arch/um/sys-ppc/asm/elf.h
index af9463cd8ce5..8aacaf56508d 100644
--- a/arch/um/sys-ppc/asm/elf.h
+++ b/arch/um/sys-ppc/asm/elf.h
@@ -17,8 +17,6 @@ extern long elf_aux_hwcap;
 #define ELF_CLASS ELFCLASS32
 #endif
 
-#define USE_ELF_CORE_DUMP
-
 #define R_386_NONE      0
 #define R_386_32        1
 #define R_386_PC32      2
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile
index 2201e9c20e4a..c1ea9eb04466 100644
--- a/arch/um/sys-x86_64/Makefile
+++ b/arch/um/sys-x86_64/Makefile
@@ -8,7 +8,8 @@ obj-y = bug.o bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \
         setjmp.o signal.o stub.o stub_segv.o syscalls.o syscall_table.o \
         sysrq.o ksyms.o tls.o
 
-subarch-obj-y = lib/csum-partial_64.o lib/memcpy_64.o lib/thunk_64.o
+subarch-obj-y = lib/csum-partial_64.o lib/memcpy_64.o lib/thunk_64.o \
+                lib/rwsem_64.o
 subarch-obj-$(CONFIG_MODULES) += kernel/module.o
 
 ldt-y = ../sys-i386/ldt.o
diff --git a/arch/um/sys-x86_64/asm/elf.h b/arch/um/sys-x86_64/asm/elf.h
index 04b9e87c8dad..49655c83efd2 100644
--- a/arch/um/sys-x86_64/asm/elf.h
+++ b/arch/um/sys-x86_64/asm/elf.h
@@ -104,7 +104,6 @@ extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
         clear_thread_flag(TIF_IA32);
 #endif
 
-#define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE 4096
 
 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
diff --git a/arch/um/sys-x86_64/syscall_table.c b/arch/um/sys-x86_64/syscall_table.c
index dd21d69715e6..47d469e7e7ce 100644
--- a/arch/um/sys-x86_64/syscall_table.c
+++ b/arch/um/sys-x86_64/syscall_table.c
@@ -26,11 +26,6 @@
 
 /* On UML we call it this way ("old" means it's not mmap2) */
 #define sys_mmap old_mmap
-/*
- * On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
- * See arch/x86_64/kernel/sys_x86_64.c
- */
-#define sys_uname sys_uname64
 
 #define stub_clone sys_clone
 #define stub_fork sys_fork
diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c
index f1199fd34d38..f3d82bb6e15a 100644
--- a/arch/um/sys-x86_64/syscalls.c
+++ b/arch/um/sys-x86_64/syscalls.c
@@ -12,20 +12,6 @@
 #include "asm/uaccess.h"
 #include "os.h"
 
-asmlinkage long sys_uname64(struct new_utsname __user * name)
-{
-        int err;
-
-        down_read(&uts_sem);
-        err = copy_to_user(name, utsname(), sizeof (*name));
-        up_read(&uts_sem);
-
-        if (personality(current->personality) == PER_LINUX32)
-                err |= copy_to_user(&name->machine, "i686", 5);
-
-        return err ? -EFAULT : 0;
-}
-
 long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr)
 {
         unsigned long *ptr = addr, tmp;