Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull misc compat stuff updates from Al Viro:
 "This part is basically untangling various compat stuff. Compat
  syscalls moved to their native counterparts, getting rid of quite a
  bit of double-copying and/or set_fs() uses. A lot of field-by-field
  copyin/copyout killed off.

   - kernel/compat.c is much closer to containing just the
     copyin/copyout of compat structs. Not all compat syscalls are gone
     from it yet, but it's getting there.

   - ipc/compat_mq.c killed off completely.

   - block/compat_ioctl.c cleaned up; floppy compat ioctls moved to
     drivers/block/floppy.c where they belong. Yes, there are several
     drivers that implement some of the same ioctls. Some are m68k and
     one is 32bit-only pmac. drivers/block/floppy.c is the only one in
     that bunch that can be built on biarch"

* 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  mqueue: move compat syscalls to native ones
  usbdevfs: get rid of field-by-field copyin
  compat_hdio_ioctl: get rid of set_fs()
  take floppy compat ioctls to sodding floppy.c
  ipmi: get rid of field-by-field __get_user()
  ipmi: get COMPAT_IPMICTL_RECEIVE_MSG in sync with the native one
  rt_sigtimedwait(): move compat to native
  select: switch compat_{get,put}_fd_set() to compat_{get,put}_bitmap()
  put_compat_rusage(): switch to copy_to_user()
  sigpending(): move compat to native
  getrlimit()/setrlimit(): move compat to native
  times(2): move compat to native
  compat_{get,put}_bitmap(): use unsafe_{get,put}_user()
  fb_get_fscreeninfo(): don't bother with do_fb_ioctl()
  do_sigaltstack(): lift copying to/from userland into callers
  take compat_sys_old_getrlimit() to native syscall
  trim __ARCH_WANT_SYS_OLD_GETRLIMIT

1 files changed, 5 insertions, 14 deletions

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 069fe7960df1..5324358f110f 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1331,22 +1331,13 @@ static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
 			      unsigned long arg)
 {
-	mm_segment_t old_fs;
 	struct fb_fix_screeninfo fix;
-	struct fb_fix_screeninfo32 __user *fix32;
-	int err;
-
-	fix32 = compat_ptr(arg);
-
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
-	set_fs(old_fs);
 
-	if (!err)
-		err = do_fscreeninfo_to_user(&fix, fix32);
-
-	return err;
+	if (!lock_fb_info(info))
+		return -ENODEV;
+	fix = info->fix;
+	unlock_fb_info(info);
+	return do_fscreeninfo_to_user(&fix, compat_ptr(arg));
 }
 
 static long fb_compat_ioctl(struct file *file, unsigned int cmd,