This patch adds jitter if desired to the delayed packets in the
netem scheduler.  I dropped the rate stuff out and reorganized so
that an underlying pfifo queue is used (next plan is to make it
have class ops).

The jitter is given as sigma to a Gaussian normal distribution.  The actual
implementation is a reduced form of the table driven stuff in NISTnet
(free).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>

This patch adds support for different size MTU's to bridging.
It is useful for bridging Ethernet's with jumbo frames, etc.

The mtu of the bridge pseudo-device is maintained as the minimum
of all the underlying ports.  And when forwarding a frame through
the bridge, it will drop the frame if the outgoing port's MTU
is less than the frame size (as per 802 standard).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>

It was an experimental hack and never finished off.
Signed-off-by: David S. Miller <davem@redhat.com>

If a multicast packet gets looped back, the sending
socket can hang if a local read just sits and does
not empty its receive queue.

The problem is that when an SKB clone is freed up,
the destructor is only invoked for the head SKB when
there is a fraglist (which is created for fragmentation).

The solution is to account the fragment list SKB lengths
in the top-level head SKB, then it all works out.
Signed-off-by: David S. Miller <davem@redhat.com>

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@redhat.com>

Signed-off-by: Jamal Hadi Salim <hadi@znyx.com>
Signed-off-by: David S. Miller <davem@redhat.com>

These doesn't allocate memory and doesn't use seq->private. However
kfree() ignores NULL, so these are not the problem.

This patch just cleans these up.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: David S. Miller <davem@redhat.com>

- pim_protocol warning fix

- ipmr_vif_open() and ipmr_mfc_open() allocates the memory, so it
  should use seq_release_private().

- ipmr_mfc_seq_xxx is using it->cache, in order to control whether
  unlock should be do or not, but it->cache was not initialized in
  ipmr_mfc_seq_start(). So it can point the previous state if user
  did seek(). This become to the cause of twice unlock.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: David S. Miller <davem@redhat.com>

The sock_i_uid and sock_i_ino functions are only called by
/proc type interfaces, so they don't need to be inlined.

Also, the inline functions writeable, rcvtimeo, sndtimeo are test
for value functions that don't change their argument.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@redhat.com>

into ppc970.osdl.org:/home/torvalds/v2.6/linux

Patch from Ian Campbell

Update 1954/1 to use pxa2xx- as the platform device prefix 
instead of pxa2xx_. This changes pxamci to pxa2xx-mci, pxa2xx_udc 
to pxa2xx-udc and pxafb to pxa2xx-fb. pxa2xx-uart doesn't need changing.

into ppc970.osdl.org:/home/torvalds/v2.6/linux

into ppc970.osdl.org:/home/torvalds/v2.6/linux

hm, I had a brainfart here.  The recent "fix" to snd_ctl_read() actually
unfixed it.  Revert that, and fix the real bug.

Cc: Jaroslav Kysela <perex@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

There was a memory leak in epoll.

The reference count (d_count) of the struct dentry of a new epoll-fd was
set to TWO.  (new_inode() assigned ONE, than ep_getfd() incremented it by
dget()).  There was only ONE reference to this dentry, so struct dentry and
struct inode were never freed.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Alexey Dobriyan <adobriyan@mail.ru>

drivers/char/upd4990a.c was removed from 2.6.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Michael Geng <linux@MichaelGeng.de>

The patch updates docs, comments + strings to also mention the SAA5281 chip
(which is compatible to the SAA5246A) as supported.
Signed-off-by: Michael Geng <linux@MichaelGeng.de>
Signed-off-by: Gerd Knorr <kraxel@bytesex.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

  CHECK   fs/smbfs/smbiod.c
fs/smbfs/smbiod.c:68:25: warning: non-ANSI parameter list
  CHECK   drivers/isdn/tpam/tpam_crcpc.c
drivers/isdn/tpam/tpam_crcpc.c:57:15: warning: non-ANSI parameter list
  CHECK   drivers/scsi/aic7xxx/aic79xx_reg_print.c
drivers/scsi/aic7xxx/aic79xx_osm.h:791:19: warning: non-ANSI parameter list
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Move the memory policy freeing to later in exit to make sure the last
memory allocations don't use an uninitialized policy.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch sets the correct capabilities flag for vesafb and vga16fb to
provide fbcon with the correct hints as to the best scrolling mode.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Added a new scrolling mode (SCROLL_PAN_REDRAW) to fbcon that should greatly
benefit unaccelerated drivers such as VESA fbdev.  An increase of 3-10 times
in scrolling speed can be expected.

Currently, fbcon has 4 different scrolling methods (1-4).  Potentially, we can
have 6.  This patch implements SCROLL_PAN_REDRAW (5).  SCROLL_WRAP_REDRAW (6)
is still unimplemented.

Scroll Mode		Operation	YPan	YWrap
+++++++++++++++++++++++++++++++++++++++++++++++++++++
1. SCROLL_ACCEL		copyarea	No	No
2. SCROLL_REDRAW	imageblit	No	No
3. SCROLL_PAN		copyarea	Yes	No
4. SCROLL_WRAP		copyarea	No	Yes
5. SCROLL_PAN_REDRAW 	imageblit	Yes	No	
6. SCROLL_WRAP_REDRAW	imageblit	No	Yes
+++++++++++++++++++++++++++++++++++++++++++++++++++++
Note 1:  I've changed the nomenclature to increase clarity:

SCROLL_ACCEL = SCROLL_MOVE
SCROLL_REDRAW = SCROLL_REDRAW
SCROLL_PAN = SCROLL_PAN_MOVE
SCROLL_WRAP = SCROLL_WRAP_MOVE

To demonstrate the effect of each of the scrolling methods on
an unaccelerated PCI/AGP-based driver (vesafb), I used a simple
benchmark (time cat linux/MAINTAINERS - a 50K text file). The
framebuffer is set at:

1024x768-8bpp, 8x16 font, yres_virtual = 2*yres

1. SCROLL_MOVE:
real    5m50.277s
user    0m0.001s
sys     5m50.227s

Almost 6 minutes for a 50K text file.  Using soft copyarea on a
PCI-based card is just too slow (because copyarea has to 
read from the framebuffer memory).

2. SCROLL_PAN_MOVE
scrollmode: SCROLL_PAN
real    0m8.592s
user    0m0.000s
sys     0m8.586s

Using ypan with copyarea dramatically improves the scrolling.  However, the
scrolling action is jerky (fast during the panning stages, slows down during
the copyarea stages).

3. SCROLL_REDRAW (this is the default scrolling mode)
real    0m3.189s
user    0m0.000s
sys     0m3.170s

Simply eliminating the copyarea, even without ypanning, makes it faster than
SCROLL_PAN_MOvE.  Plus, the scrolling action is smoother.

So, if we combine YPanning with imageblit (PAN_REDRAW), we get this:

4. SCROLL_PAN_REDRAW
real    0m0.520s
user    0m0.000s
sys     0m0.518s

That's almost 6x faster than SCROLL_REDRAW.  Increasing the amount of video
RAM still increases the speed, but not very dramatically.  Higher than 16 MB,
the increase is negligible.

Using an accelerated driver, we see almost the same effect but not as
dramatically:

1. SCROLL_MOVE - accel
real    0m3.112s
user    0m0.000s
sys     0m3.112s

2. SCROLL_REDRAW - accel
real    0m2.604s
user    0m0.000s
sys     0m2.603s

Redraw is still faster than move, but not much.

3. SCROLL_PAN_MOVE - accel
real    0m0.203s
user    0m0.000s
sys     0m0.202s

4. SCROLL_PAN_REDRAW - accel
real    0m0.326s
user    0m0.002s
sys     0m0.323s

This is one exception.  If panning is enabled, move is actually faster than
redraw.  As to why, I don't know.

So based on the above, fbcon will choose the scrolling method based on the
following preference:

Ypan/Ywrap > accel imageblit > accel copyarea >
soft imageblit > (soft copyarea)

Note 2: Exception: accel copyarea > accel imageblit if Pan/Wrap is enabled.

Note 3: soft copyarea will be avoided by fbcon as much as possible unless
there is a specific override, ie., FBINFO_READS_FAST flag is set.  If this
flag is set, fbcon will prefer copyarea over imageblit, accel or soft.

As a final note, in order for fbcon to use the best scrolling method, the
low-level drivers must provide the correct hinting by setting the
FBINFO_HWACCEL_* flags.

To vesafb users: boot vesafb like this for fastest scrolling action:

video=vesafb:ypan,vram:16
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1.  From Petr Vandrovec <vandrove@vc.cvut.cz>.

Begin quote

        yesterday I finally found why 2.6.x has problems with taking
        over vgacon.  Problem is that take_over_console does:

  	if (IS_VISIBLE)
    	save_screen(i);
  	...
  	visual_init(i, 0);
  	...

        so code nicely saves screen contents, and calls visual_init,
        which calls fbcon's init, which in turn can issue vc_resize.  And this
        vc_resize will trigger read from vc->vc_origin.  But vc_origin still
        points to videomemory, not to the buffer where save_screen() copied
        its data.

End quote

So updating vc->vc_origin to point to screenbuf after the previous console
deinitializes allows fbcon to correctly update the screen from the screen
buffer.  This change makes the clearing of vram (using fillrect) unnecessary.

2.  If FBINFO_MISC_MODESWITCH flag is set in info, do the set_par() in
fbcon_switch() instead of piggy-backing the set_par() on fbcon_resize().  This
preserves the current var, skipping the unnecessary fb_find_mode() step.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Ugly workaround.  When switching from KD_GRAPHICS to KD_TEXT, the event is
captured at fbcon_blank() allowing fbcon to reinitialize the hardware.
However, some hardware requires the reinitialization to be done
immediately, others require it to be done later.  Others may need it to be
done immediately and later, this is the worst case.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Ursula Braun-Krahl <braunu@de.ibm.com>
From: Heiko Carstens <heiko.carstens@de.ibm.com>
From: Gerald Schaefer <geraldsc@de.ibm.com>
From: Martin Schwidefsky <schwidefsky@de.ibm.com>

Add s390 architecture support for cpu hotplug.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

This patch introduces a notifier chain for cpu idle.  There are two events
CPU_IDLE and CPU_NOT_IDLE that are called just before the cpu goes to sleep
and right after the cpu woke up again.  The notifier is used to simplify the
no-hz-timer-in-idle feature and the virtual cpu timers.  In addition the
virtual cpu timer functions have been moved to arch/s390/kernel/vtime.c, which
gives a nice separation between the timer functions related to real time and
the timer functions related to virtual cpu time.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Peter Tiedemann <ptiedem@de.ibm.com>

ctc driver changes:
 - Make use of the debug feature to ease debugging.
 - ctctty: use dev_alloc_name to allocate a network device name.
 - ctctty: avoid deadlock of ctc_tty_close vs ctc_tty_flush_buffer.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Arnd Bergmann <arndb@de.ibm.com>

Common i/o layer changes:
 - Reorder checking and setting of the ccw device id.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

From: Horst Hummel <horst.hummel@de.ibm.com>

dasd device driver changes:
 - Set and check the retry counter in start_IO for all requests.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Setting it to inet_accept causes UDP accept attempts
to OOPS.  In particular, accept01 from LTP tries this.
Signed-off-by: David S. Miller <davem@redhat.com>

This version does not change user visible structures.
Signed-off-by: Jamal Hadi Salim <hadi@znyx.com>
Signed-off-by: David S. Miller <davem@redhat.com>

- rtnetlink.h needs including
- optimize loss test so that net_random() call is not done
  when no-loss is indicated
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>