into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

author: Daniele Bellucci <bellucda@tiscali.it>

Fix a memory leak and checks a copy_from_user in wan/comx driver.

author: Daniele Bellucci <bellucda@tiscali.it>

author: Daniele Bellucci <bellucda@tiscali.it>

Fix an unchecked copy_from_user in ieee1394/amdtp.

author: Daniele Bellucci <bellucda@tiscali.it>

Fix several unchecked copy_to_user()s in sbus/char/envctrl

author:  Daniele Bellucci <bellucda@tiscali.it>

Fix a series of unchecked copy/put_user()s in umsdos ioctl.

From: Daniele Bellucci <bellucda@tiscali.it>

Fix an unchecked copy_to_user in ray_cs ioctl.

From:  Matthew Wilcox <willy@debian.org> and Daniele Bellucci <bellucda@tiscali.it>

Fix an unchecked copy_to_user() in net/irda/vlsi_ir.c.

From: Daniele Bellucci <bellucda@tiscali.it>

Add a status check to copy_to_user() in a media/video driver.

From: Daniele Bellucci <bellucda@tiscali.it>

Add a check to misc_register() in the wdt977 driver.

From: Daniele Bellucci <bellucda@tiscali.it>

This is an audit (copy_*_user), cleanup, and coding-style fix
for this driver.

into nuts.ninka.net:/home/davem/src/BK/sparc-2.5

As noted by Gergely Nagy:

  "devfs_mk_cdev() first checks the mode passed to it, and if it thinks
   it is not a char device, it prints a warning and aborts.  Now, this
   printing involves the local variable `buf' (char buf[64]), which is
   not initialised at that point."

The same problem also affects devfs_mk_bdev.

Fixed thus.

davidm@hpl.hp.com writes:
  "I'm working on updating the ia64 tree with local_t etc.  One
   thing that would really help me: could you make
   asm-generic/percpu_modcopy() a macro?  The routine depends on
   cpu_possible(), but I can't including smp.h in percpu.h since
   that would lead to recusive header-file dependencies (and in my
   opinion, percpu.h should be more "primitive" than smp.h, so that
   it can be included virtually everywhere)."

A few places pre-declare "int module_init(void);" and "void
module_cleanup(void);".  Other than being obsolete, this is
unneccessary (it's in init.h anyway).

There are still about 100 places which still use the
obsolete-since-2.2 "a function named module_init() magically gets
called": this change frees us up implement that via a macro.

Author: Neil Brown

Define module_put_and_exit() and use it for nfsd/lockd

Both nfsd and lockd have threads which expect to hold a reference
to the module while the thread is running.  In order for the thread
to be able to put_module() the module before exiting, the
put_module code must be call from outside the module.

This patch provides module_put_and_exit in non-modular code which a
thread-in-a-module can call.  It also gets nfsd and lockd to use it
as appropriate.

Note that in lockd, we can __get_module in the thread itself as the
creator of the thread is waiting for the thread to startup.

In nfsd and for the 'reclaimer' threaded started by locked, we
__get_module first and put_module if the thread failed to start.

Somehow, the code which taints the kernel when rmmod -f is used got
lost.  Restore it.

These are the local_t bits for sparc64.

Other platforms such as PPC64 and Alpha (and in fact any "load locked/
store conditional" like platform other than IA64), probably want to do
something similar.

Uses local_t for module reference counts.

Introduces local_t, a type which is like atomic_t, but the
operations are only atomic from a single CPU's point of view
(ie. atomic against interrupts and softirqs). Some architectures
(eg. i386) can implement these very efficiently.

There are special operations for the case of a local operation on a
per-cpu variable (which is common), which some architectures can
implement efficiently (eg. IA64 keeps all per-cpu variables mapped
at the same address, so no address arithmetic is needed).

The generic implementation given here simply uses atomics on 32-bit
archs, three variables on others.  x86 is already implemented specially.