[PATCH] Run 32bit compat ioctl handlers in BKL

Give 32bit emulation ioctl handlers the same locking rules as normal ioctl handlers.
This will avoid surprises in driver code.

Most call sys_ioctl who would take it anyways.

fs/compat.c

@@ -406,9 +406,11 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned lon
  while (t && t->cmd != cmd)
  t = (struct ioctl_trans *)t->next;
  if (t) {
- if (t->handler)
+ if (t->handler) { 
+ lock_kernel();
  error = t->handler(fd, cmd, arg, filp);
- else
+ unlock_kernel();
+ } else
  error = sys_ioctl(fd, cmd, arg);
  } else if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
  error = siocdevprivate_ioctl(fd, cmd, arg);