32 files changed, 186 insertions, 274 deletions

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 9fee37e2596f..32ca1b927307 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -981,27 +981,18 @@ asmlinkage int
 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
            struct timeval32 __user *tvp)
 {
-        fd_set_bits fds;
-        char *bits;
-        size_t size;
-        long timeout;
-        int ret = -EINVAL;
-        struct fdtable *fdt;
-        int max_fds;
-
-        timeout = MAX_SCHEDULE_TIMEOUT;
+        s64 timeout = MAX_SCHEDULE_TIMEOUT;
         if (tvp) {
                 time_t sec, usec;
 
                 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
                     || __get_user(sec, &tvp->tv_sec)
                     || __get_user(usec, &tvp->tv_usec)) {
-                        ret = -EFAULT;
-                        goto out_nofds;
+                        return -EFAULT;
                 }
 
                 if (sec < 0 || usec < 0)
-                        goto out_nofds;
+                        return -EINVAL;
 
                 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
                         timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
@@ -1009,60 +1000,8 @@ osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
                 }
         }
 
-        rcu_read_lock();
-        fdt = files_fdtable(current->files);
-        max_fds = fdt->max_fds;
-        rcu_read_unlock();
-        if (n < 0 || n > max_fds)
-                goto out_nofds;
-
-        /*
-         * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
-         * since we used fdset we need to allocate memory in units of
-         * long-words. 
-         */
-        ret = -ENOMEM;
-        size = FDS_BYTES(n);
-        bits = kmalloc(6 * size, GFP_KERNEL);
-        if (!bits)
-                goto out_nofds;
-        fds.in      = (unsigned long *)  bits;
-        fds.out     = (unsigned long *) (bits +   size);
-        fds.ex      = (unsigned long *) (bits + 2*size);
-        fds.res_in  = (unsigned long *) (bits + 3*size);
-        fds.res_out = (unsigned long *) (bits + 4*size);
-        fds.res_ex  = (unsigned long *) (bits + 5*size);
-
-        if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
-            (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
-            (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
-                goto out;
-        zero_fd_set(n, fds.res_in);
-        zero_fd_set(n, fds.res_out);
-        zero_fd_set(n, fds.res_ex);
-
-        ret = do_select(n, &fds, &timeout);
-
         /* OSF does not copy back the remaining time.  */
-
-        if (ret < 0)
-                goto out;
-        if (!ret) {
-                ret = -ERESTARTNOHAND;
-                if (signal_pending(current))
-                        goto out;
-                ret = 0;
-        }
-
-        if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
-            set_fd_set(n, outp->fds_bits, fds.res_out) ||
-            set_fd_set(n, exp->fds_bits, fds.res_ex))
-                ret = -EFAULT;
-
- out:
-        kfree(bits);
- out_nofds:
-        return ret;
+        return core_sys_select(n, inp, outp, exp, &timeout);
 }
 
 struct rusage32 {
diff --git a/arch/mips/kernel/irixioctl.c b/arch/mips/kernel/irixioctl.c
index 2bde200d5ad0..b39bdba82e02 100644
--- a/arch/mips/kernel/irixioctl.c
+++ b/arch/mips/kernel/irixioctl.c
@@ -27,33 +27,6 @@ struct irix_termios {
         cc_t c_cc[NCCS];
 };
 
-extern void start_tty(struct tty_struct *tty);
-static struct tty_struct *get_tty(int fd)
-{
-        struct file *filp;
-        struct tty_struct *ttyp = NULL;
-
-        rcu_read_lock();
-        filp = fcheck(fd);
-        if(filp && filp->private_data) {
-                ttyp = (struct tty_struct *) filp->private_data;
-
-                if(ttyp->magic != TTY_MAGIC)
-                        ttyp =NULL;
-        }
-        rcu_read_unlock();
-        return ttyp;
-}
-
-static struct tty_struct *get_real_tty(struct tty_struct *tp)
-{
-        if (tp->driver->type == TTY_DRIVER_TYPE_PTY &&
-           tp->driver->subtype == PTY_TYPE_MASTER)
-                return tp->link;
-        else
-                return tp;
-}
-
 asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
 {
         struct tty_struct *tp, *rtp;
@@ -146,34 +119,24 @@ asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
                 error = sys_ioctl(fd, TIOCNOTTY, arg);
                 break;
 
-        case 0x00007416:
+        case 0x00007416: {
+                pid_t pid;
 #ifdef DEBUG_IOCTLS
                 printk("TIOCGSID, %08lx) ", arg);
 #endif
-                tp = get_tty(fd);
-                if(!tp) {
-                        error = -EINVAL;
-                        break;
-                }
-                rtp = get_real_tty(tp);
-#ifdef DEBUG_IOCTLS
-                printk("rtp->session=%d ", rtp->session);
-#endif
-                error = put_user(rtp->session, (unsigned long __user *) arg);
+                old_fs = get_fs(); set_fs(get_ds());
+                error = sys_ioctl(fd, TIOCGSID, (unsigned long)&pid);
+                set_fs(old_fs);
+                if (!error)
+                        error = put_user(pid, (unsigned long __user *) arg);
                 break;
-
+        }
         case 0x746e:
                 /* TIOCSTART, same effect as hitting ^Q */
 #ifdef DEBUG_IOCTLS
                 printk("TIOCSTART, %08lx) ", arg);
 #endif
-                tp = get_tty(fd);
-                if(!tp) {
-                        error = -EINVAL;
-                        break;
-                }
-                rtp = get_real_tty(tp);
-                start_tty(rtp);
+                error = sys_ioctl(fd, TCXONC, TCOON);
                 break;
 
         case 0x20006968:
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index 998c4efcce88..ceb62dce1c9c 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -20,6 +20,7 @@
 #include <linux/sched.h>
 #include <linux/unistd.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/fs.h>
 #include <linux/syscalls.h>
 #include <linux/workqueue.h>
diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
index b962c3ab470c..af116aadba10 100644
--- a/arch/powerpc/platforms/cell/spufs/coredump.c
+++ b/arch/powerpc/platforms/cell/spufs/coredump.c
@@ -22,6 +22,7 @@
 
 #include <linux/elf.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/fs.h>
 #include <linux/list.h>
 #include <linux/module.h>
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index 6342b0534f4d..3582f43345a8 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -11,6 +11,7 @@
 
 #include <linux/audit.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/tty.h>
 
 struct tty_audit_buf {
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 1d298c2cf930..49c1a2267a55 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -78,6 +78,7 @@
 #include <linux/tty_flip.h>
 #include <linux/devpts_fs.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/console.h>
 #include <linux/timer.h>
 #include <linux/ctype.h>
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index f42be069e085..977ef208c051 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -57,9 +57,6 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
  *                    anonymous inode, and a dentry that describe the "class"
  *                    of the file
  *
- * @pfd:     [out]   pointer to the file descriptor
- * @dpinode: [out]   pointer to the inode
- * @pfile:   [out]   pointer to the file struct
  * @name:    [in]    name of the "class" of the new file
  * @fops     [in]    file operations for the new file
  * @priv     [in]    private data for the new file (will be file's private_data)
@@ -68,10 +65,9 @@ static struct dentry_operations anon_inodefs_dentry_operations = {
  * that do not need to have a full-fledged inode in order to operate correctly.
  * All the files created with anon_inode_getfd() will share a single inode,
  * hence saving memory and avoiding code duplication for the file/inode/dentry
- * setup.
+ * setup.  Returns new descriptor or -error.
  */
-int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
-                     const char *name, const struct file_operations *fops,
+int anon_inode_getfd(const char *name, const struct file_operations *fops,
                      void *priv)
 {
         struct qstr this;
@@ -125,10 +121,7 @@ int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
 
         fd_install(fd, file);
 
-        *pfd = fd;
-        *pinode = anon_inode_inode;
-        *pfile = file;
-        return 0;
+        return fd;
 
 err_dput:
         dput(dentry);
diff --git a/fs/compat.c b/fs/compat.c
index 139dc93c092d..332a869d2c53 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -24,6 +24,7 @@
 #include <linux/fcntl.h>
 #include <linux/namei.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/vfs.h>
 #include <linux/ioctl.h>
 #include <linux/init.h>
diff --git a/fs/dnotify.c b/fs/dnotify.c
index eaecc4cfe540..676073b8dda5 100644
--- a/fs/dnotify.c
+++ b/fs/dnotify.c
@@ -20,7 +20,7 @@
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
-#include <linux/file.h>
+#include <linux/fdtable.h>
 
 int dir_notify_enable __read_mostly = 1;
 
diff --git a/fs/eventfd.c b/fs/eventfd.c
index a9f130cd50ac..343942deeec1 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -200,10 +200,8 @@ struct file *eventfd_fget(int fd)
 
 asmlinkage long sys_eventfd(unsigned int count)
 {
-        int error, fd;
+        int fd;
         struct eventfd_ctx *ctx;
-        struct file *file;
-        struct inode *inode;
 
         ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
         if (!ctx)
@@ -216,12 +214,9 @@ asmlinkage long sys_eventfd(unsigned int count)
          * When we call this, the initialization must be complete, since
          * anon_inode_getfd() will install the fd.
          */
-        error = anon_inode_getfd(&fd, &inode, &file, "[eventfd]",
-                                 &eventfd_fops, ctx);
-        if (!error)
-                return fd;
-
-        kfree(ctx);
-        return error;
+        fd = anon_inode_getfd("[eventfd]", &eventfd_fops, ctx);
+        if (fd < 0)
+                kfree(ctx);
+        return fd;
 }
 
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 221086fef174..990c01d2d66b 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1050,8 +1050,6 @@ asmlinkage long sys_epoll_create(int size)
 {
         int error, fd = -1;
         struct eventpoll *ep;
-        struct inode *inode;
-        struct file *file;
 
         DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
                      current, size));
@@ -1061,29 +1059,24 @@ asmlinkage long sys_epoll_create(int size)
          * structure ( "struct eventpoll" ).
          */
         error = -EINVAL;
-        if (size <= 0 || (error = ep_alloc(&ep)) != 0)
+        if (size <= 0 || (error = ep_alloc(&ep)) < 0) {
+                fd = error;
                 goto error_return;
+        }
 
         /*
          * Creates all the items needed to setup an eventpoll file. That is,
-         * a file structure, and inode and a free file descriptor.
+         * a file structure and a free file descriptor.
          */
-        error = anon_inode_getfd(&fd, &inode, &file, "[eventpoll]",
-                                 &eventpoll_fops, ep);
-        if (error)
-                goto error_free;
+        fd = anon_inode_getfd("[eventpoll]", &eventpoll_fops, ep);
+        if (fd < 0)
+                ep_free(ep);
 
+error_return:
         DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
                      current, size, fd));
 
         return fd;
-
-error_free:
-        ep_free(ep);
-error_return:
-        DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
-                     current, size, error));
-        return error;
 }
 
 /*
diff --git a/fs/exec.c b/fs/exec.c
index 9f9f931ef949..aeaa9791d8be 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -24,6 +24,7 @@
 
 #include <linux/slab.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/mman.h>
 #include <linux/a.out.h>
 #include <linux/stat.h>
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 3f3ac630ccde..bfd776509a72 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -9,6 +9,7 @@
 #include <linux/mm.h>
 #include <linux/fs.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/capability.h>
 #include <linux/dnotify.h>
 #include <linux/smp_lock.h>
diff --git a/fs/file.c b/fs/file.c
index 5110acb1c9ef..4c6f0ea12c41 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/bitops.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
@@ -149,8 +150,16 @@ static struct fdtable * alloc_fdtable(unsigned int nr)
         nr /= (1024 / sizeof(struct file *));
         nr = roundup_pow_of_two(nr + 1);
         nr *= (1024 / sizeof(struct file *));
-        if (nr > sysctl_nr_open)
-                nr = sysctl_nr_open;
+        /*
+         * Note that this can drive nr *below* what we had passed if sysctl_nr_open
+         * had been set lower between the check in expand_files() and here.  Deal
+         * with that in caller, it's cheaper that way.
+         *
+         * We make sure that nr remains a multiple of BITS_PER_LONG - otherwise
+         * bitmaps handling below becomes unpleasant, to put it mildly...
+         */
+        if (unlikely(nr > sysctl_nr_open))
+                nr = ((sysctl_nr_open - 1) | (BITS_PER_LONG - 1)) + 1;
 
         fdt = kmalloc(sizeof(struct fdtable), GFP_KERNEL);
         if (!fdt)
@@ -199,6 +208,16 @@ static int expand_fdtable(struct files_struct *files, int nr)
         if (!new_fdt)
                 return -ENOMEM;
         /*
+         * extremely unlikely race - sysctl_nr_open decreased between the check in
+         * caller and alloc_fdtable().  Cheaper to catch it here...
+         */
+        if (unlikely(new_fdt->max_fds <= nr)) {
+                free_fdarr(new_fdt);
+                free_fdset(new_fdt);
+                kfree(new_fdt);
+                return -EMFILE;
+        }
+        /*
          * Check again since another task may have expanded the fd table while
          * we dropped the lock
          */
diff --git a/fs/file_table.c b/fs/file_table.c
index 7a0a9b872251..83084225b4c3 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -8,6 +8,7 @@
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/fs.h>
diff --git a/fs/locks.c b/fs/locks.c
index 44d9a6a7ec50..663c069b59b3 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -116,6 +116,7 @@
 
 #include <linux/capability.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/module.h>
diff --git a/fs/open.c b/fs/open.c
index 7af1f05d5978..a1450086e92f 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -7,6 +7,7 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/quotaops.h>
 #include <linux/fsnotify.h>
 #include <linux/module.h>
diff --git a/fs/proc/array.c b/fs/proc/array.c
index c135cbdd9127..dca997a93bff 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -73,6 +73,7 @@
 #include <linux/signal.h>
 #include <linux/highmem.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/times.h>
 #include <linux/cpuset.h>
 #include <linux/rcupdate.h>
diff --git a/fs/proc/base.c b/fs/proc/base.c
index fcf02f2deeba..808cbdc193d3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -56,6 +56,7 @@
 #include <linux/init.h>
 #include <linux/capability.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/string.h>
 #include <linux/seq_file.h>
 #include <linux/namei.h>
diff --git a/fs/select.c b/fs/select.c
index 2c292146e246..8dda969614a9 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -21,6 +21,7 @@
 #include <linux/poll.h>
 #include <linux/personality.h> /* for STICKY_TIMEOUTS */
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/fs.h>
 #include <linux/rcupdate.h>
 
@@ -298,7 +299,7 @@ int do_select(int n, fd_set_bits *fds, s64 *timeout)
 #define MAX_SELECT_SECONDS \
         ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
 
-static int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
+int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
                            fd_set __user *exp, s64 *timeout)
 {
         fd_set_bits fds;
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 8ead0db35933..619725644c75 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -207,11 +207,8 @@ static const struct file_operations signalfd_fops = {
 
 asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemask)
 {
-        int error;
         sigset_t sigmask;
         struct signalfd_ctx *ctx;
-        struct file *file;
-        struct inode *inode;
 
         if (sizemask != sizeof(sigset_t) ||
             copy_from_user(&sigmask, user_mask, sizeof(sigmask)))
@@ -230,12 +227,11 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
                  * When we call this, the initialization must be complete, since
                  * anon_inode_getfd() will install the fd.
                  */
-                error = anon_inode_getfd(&ufd, &inode, &file, "[signalfd]",
-                                         &signalfd_fops, ctx);
-                if (error)
-                        goto err_fdalloc;
+                ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx);
+                if (ufd < 0)
+                        kfree(ctx);
         } else {
-                file = fget(ufd);
+                struct file *file = fget(ufd);
                 if (!file)
                         return -EBADF;
                 ctx = file->private_data;
@@ -252,9 +248,4 @@ asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemas
         }
 
         return ufd;
-
-err_fdalloc:
-        kfree(ctx);
-        return error;
 }
-
diff --git a/fs/timerfd.c b/fs/timerfd.c
index 5400524e9cb1..d87d354ec424 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -181,10 +181,8 @@ static struct file *timerfd_fget(int fd)
 
 asmlinkage long sys_timerfd_create(int clockid, int flags)
 {
-        int error, ufd;
+        int ufd;
         struct timerfd_ctx *ctx;
-        struct file *file;
-        struct inode *inode;
 
         if (flags)
                 return -EINVAL;
@@ -200,12 +198,9 @@ asmlinkage long sys_timerfd_create(int clockid, int flags)
         ctx->clockid = clockid;
         hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
 
-        error = anon_inode_getfd(&ufd, &inode, &file, "[timerfd]",
-                                 &timerfd_fops, ctx);
-        if (error) {
+        ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx);
+        if (ufd < 0)
                 kfree(ctx);
-                return error;
-        }
 
         return ufd;
 }
diff --git a/include/linux/anon_inodes.h b/include/linux/anon_inodes.h
index b2e1ba325b9a..6129e58ca7c9 100644
--- a/include/linux/anon_inodes.h
+++ b/include/linux/anon_inodes.h
@@ -8,8 +8,7 @@
 #ifndef _LINUX_ANON_INODES_H
 #define _LINUX_ANON_INODES_H
 
-int anon_inode_getfd(int *pfd, struct inode **pinode, struct file **pfile,
-                     const char *name, const struct file_operations *fops,
+int anon_inode_getfd(const char *name, const struct file_operations *fops,
                      void *priv);
 
 #endif /* _LINUX_ANON_INODES_H */
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
new file mode 100644
index 000000000000..a118f3c0b240
--- /dev/null
+++ b/include/linux/fdtable.h
@@ -0,0 +1,99 @@
+/*
+ * descriptor table internals; you almost certainly want file.h instead.
+ */
+
+#ifndef __LINUX_FDTABLE_H
+#define __LINUX_FDTABLE_H
+
+#include <asm/atomic.h>
+#include <linux/posix_types.h>
+#include <linux/compiler.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#include <linux/types.h>
+
+/*
+ * The default fd array needs to be at least BITS_PER_LONG,
+ * as this is the granularity returned by copy_fdset().
+ */
+#define NR_OPEN_DEFAULT BITS_PER_LONG
+
+/*
+ * The embedded_fd_set is a small fd_set,
+ * suitable for most tasks (which open <= BITS_PER_LONG files)
+ */
+struct embedded_fd_set {
+        unsigned long fds_bits[1];
+};
+
+struct fdtable {
+        unsigned int max_fds;
+        struct file ** fd;      /* current fd array */
+        fd_set *close_on_exec;
+        fd_set *open_fds;
+        struct rcu_head rcu;
+        struct fdtable *next;
+};
+
+/*
+ * Open file table structure
+ */
+struct files_struct {
+  /*
+   * read mostly part
+   */
+        atomic_t count;
+        struct fdtable *fdt;
+        struct fdtable fdtab;
+  /*
+   * written part on a separate cache line in SMP
+   */
+        spinlock_t file_lock ____cacheline_aligned_in_smp;
+        int next_fd;
+        struct embedded_fd_set close_on_exec_init;
+        struct embedded_fd_set open_fds_init;
+        struct file * fd_array[NR_OPEN_DEFAULT];
+};
+
+#define files_fdtable(files) (rcu_dereference((files)->fdt))
+
+extern struct kmem_cache *filp_cachep;
+
+struct file_operations;
+struct vfsmount;
+struct dentry;
+
+extern int expand_files(struct files_struct *, int nr);
+extern void free_fdtable_rcu(struct rcu_head *rcu);
+extern void __init files_defer_init(void);
+
+static inline void free_fdtable(struct fdtable *fdt)
+{
+        call_rcu(&fdt->rcu, free_fdtable_rcu);
+}
+
+static inline struct file * fcheck_files(struct files_struct *files, unsigned int fd)
+{
+        struct file * file = NULL;
+        struct fdtable *fdt = files_fdtable(files);
+
+        if (fd < fdt->max_fds)
+                file = rcu_dereference(fdt->fd[fd]);
+        return file;
+}
+
+/*
+ * Check whether the specified fd has an open file.
+ */
+#define fcheck(fd)      fcheck_files(current->files, fd)
+
+struct task_struct;
+
+struct files_struct *get_files_struct(struct task_struct *);
+void put_files_struct(struct files_struct *fs);
+void reset_files_struct(struct files_struct *);
+int unshare_files(struct files_struct **);
+
+extern struct kmem_cache *files_cachep;
+
+#endif /* __LINUX_FDTABLE_H */
diff --git a/include/linux/file.h b/include/linux/file.h
index 69baf5a4f0a5..27c64bdc68c9 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -5,59 +5,11 @@
 #ifndef __LINUX_FILE_H
 #define __LINUX_FILE_H
 
-#include <asm/atomic.h>
-#include <linux/posix_types.h>
 #include <linux/compiler.h>
-#include <linux/spinlock.h>
-#include <linux/rcupdate.h>
 #include <linux/types.h>
+#include <linux/posix_types.h>
 
-/*
- * The default fd array needs to be at least BITS_PER_LONG,
- * as this is the granularity returned by copy_fdset().
- */
-#define NR_OPEN_DEFAULT BITS_PER_LONG
-
-/*
- * The embedded_fd_set is a small fd_set,
- * suitable for most tasks (which open <= BITS_PER_LONG files)
- */
-struct embedded_fd_set {
-        unsigned long fds_bits[1];
-};
-
-struct fdtable {
-        unsigned int max_fds;
-        struct file ** fd;      /* current fd array */
-        fd_set *close_on_exec;
-        fd_set *open_fds;
-        struct rcu_head rcu;
-        struct fdtable *next;
-};
-
-/*
- * Open file table structure
- */
-struct files_struct {
-  /*
-   * read mostly part
-   */
-        atomic_t count;
-        struct fdtable *fdt;
-        struct fdtable fdtab;
-  /*
-   * written part on a separate cache line in SMP
-   */
-        spinlock_t file_lock ____cacheline_aligned_in_smp;
-        int next_fd;
-        struct embedded_fd_set close_on_exec_init;
-        struct embedded_fd_set open_fds_init;
-        struct file * fd_array[NR_OPEN_DEFAULT];
-};
-
-#define files_fdtable(files) (rcu_dereference((files)->fdt))
-
-extern struct kmem_cache *filp_cachep;
+struct file;
 
 extern void __fput(struct file *);
 extern void fput(struct file *);
@@ -85,41 +37,7 @@ extern void put_filp(struct file *);
 extern int get_unused_fd(void);
 extern int get_unused_fd_flags(int flags);
 extern void put_unused_fd(unsigned int fd);
-struct kmem_cache;
-
-extern int expand_files(struct files_struct *, int nr);
-extern void free_fdtable_rcu(struct rcu_head *rcu);
-extern void __init files_defer_init(void);
-
-static inline void free_fdtable(struct fdtable *fdt)
-{
-        call_rcu(&fdt->rcu, free_fdtable_rcu);
-}
-
-static inline struct file * fcheck_files(struct files_struct *files, unsigned int fd)
-{
-        struct file * file = NULL;
-        struct fdtable *fdt = files_fdtable(files);
-
-        if (fd < fdt->max_fds)
-                file = rcu_dereference(fdt->fd[fd]);
-        return file;
-}
-
-/*
- * Check whether the specified fd has an open file.
- */
-#define fcheck(fd)      fcheck_files(current->files, fd)
 
 extern void fd_install(unsigned int fd, struct file *file);
 
-struct task_struct;
-
-struct files_struct *get_files_struct(struct task_struct *);
-void put_files_struct(struct files_struct *fs);
-void reset_files_struct(struct files_struct *);
-int unshare_files(struct files_struct **);
-
-extern struct kmem_cache *files_cachep;
-
 #endif /* __LINUX_FILE_H */
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index bf6b8a61f8db..b24c2875aa05 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -1,7 +1,7 @@
 #ifndef _LINUX__INIT_TASK_H
 #define _LINUX__INIT_TASK_H
 
-#include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/rcupdate.h>
 #include <linux/irqflags.h>
 #include <linux/utsname.h>
diff --git a/include/linux/poll.h b/include/linux/poll.h
index 16d813b364ef..ef453828877a 100644
--- a/include/linux/poll.h
+++ b/include/linux/poll.h
@@ -117,6 +117,8 @@ void zero_fd_set(unsigned long nr, unsigned long *fdset)
 extern int do_select(int n, fd_set_bits *fds, s64 *timeout);
 extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds,
                        s64 *timeout);
+extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
+                           fd_set __user *exp, s64 *timeout);
 
 #endif /* KERNEL */
 
diff --git a/kernel/exit.c b/kernel/exit.c
index d3ad54677f9c..1510f78a0ffa 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -19,6 +19,7 @@
 #include <linux/acct.h>
 #include <linux/tsacct_kern.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/binfmts.h>
 #include <linux/nsproxy.h>
 #include <linux/pid_namespace.h>
diff --git a/kernel/fork.c b/kernel/fork.c
index 2bb675af4de3..933e60ebccae 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -22,6 +22,7 @@
 #include <linux/mempolicy.h>
 #include <linux/sem.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/key.h>
 #include <linux/binfmts.h>
 #include <linux/mman.h>
diff --git a/kernel/kmod.c b/kernel/kmod.c
index e2764047ec03..8df97d3dfda8 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -27,6 +27,7 @@
 #include <linux/mnt_namespace.h>
 #include <linux/completion.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/workqueue.h>
 #include <linux/security.h>
 #include <linux/mount.h>
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 1b50a6ebc55f..1c864c0efe2b 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -39,6 +39,7 @@
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
 #include <linux/file.h>
+#include <linux/fdtable.h>
 #include <linux/namei.h>
 #include <linux/mount.h>
 #include <linux/ext2_fs.h>
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index c82cf15730a1..e89338e2b043 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -834,16 +834,9 @@ static const struct file_operations kvm_vcpu_fops = {
  */
 static int create_vcpu_fd(struct kvm_vcpu *vcpu)
 {
-        int fd, r;
-        struct inode *inode;
-        struct file *file;
-
-        r = anon_inode_getfd(&fd, &inode, &file,
-                             "kvm-vcpu", &kvm_vcpu_fops, vcpu);
-        if (r) {
+        int fd = anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu);
+        if (fd < 0)
                 kvm_put_kvm(vcpu->kvm);
-                return r;
-        }
         return fd;
 }
 
@@ -1168,19 +1161,15 @@ static const struct file_operations kvm_vm_fops = {
 
 static int kvm_dev_ioctl_create_vm(void)
 {
-        int fd, r;
-        struct inode *inode;
-        struct file *file;
+        int fd;
         struct kvm *kvm;
 
         kvm = kvm_create_vm();
         if (IS_ERR(kvm))
                 return PTR_ERR(kvm);
-        r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
-        if (r) {
+        fd = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm);
+        if (fd < 0)
                 kvm_put_kvm(kvm);
-                return r;
-        }
 
         return fd;
 }