linux.git/drivers/char/vt.c, branch v2.6.21

[PATCH] Initialise SAK member for each virtual console to prevent oops

2007-03-17T02:25:06+00:00

Initialise the SAK member of the vc_cons variable on all virtual terminals,
not only the first one.  This prevents an oops when trying Sysrq-C on e.g.
the second virtual terminal:

  kernel BUG at kernel/workqueue.c:212!
  invalid opcode: 0000 [1] SMP
  CPU 0
  Modules linked in: i915 drm deflate zlib_deflate twofish twofish_common serpent blowfish des ce
  Pid: 0, comm: swapper Not tainted 2.6.21-rc3-default #15
  RIP: 0010:[]  [] queue_work+0x32/0x51
  RSP: 0018:ffffffff805fada8  EFLAGS: 00010013
  RAX: ffffffff80683f38 RBX: ffffffff804ae700 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: ffffffff80683f30 RDI: ffff81000134a840
  RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000002
  R10: ffffffff805990e0 R11: ffff810037f4c0f0 R12: 000000000000006b
  R13: ffff81007aa23000 R14: 0000000000000001 R15: 0000000000000096
  FS:  0000000000000000(0000) GS:ffffffff804d8000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
  CR2: 00002b72026e9000 CR3: 0000000079175000 CR4: 00000000000006e0
  Process swapper (pid: 0, threadinfo ffffffff8059e000, task ffffffff80490840)
  Stack:  0000000000000096 ffffffff803635db ffffffff805fadf8 0000000000000001
   ffff8100013c2e40 0000000000000025 ffff81007c931c00 ffff81007aa23000
   0000000000000001 ffffffff8035e3ee 0000000000000092 ffff810037cc8000
  Call Trace:
     [] __handle_sysrq+0x98/0x129
   [] kbd_event+0x32e/0x56a
   [] input_event+0x422/0x44a
   [] atkbd_interrupt+0x449/0x503
   [] serio_interrupt+0x37/0x6f
   [] i8042_interrupt+0x1f4/0x20a
   [] smp_send_timer_broadcast_ipi+0x2d/0x4e
   [] handle_IRQ_event+0x25/0x53
   [] handle_edge_irq+0xe4/0x128
   [] call_softirq+0x1c/0x28
   [] do_IRQ+0x6c/0xd3
   [] mwait_idle+0x0/0x45
   [] ret_from_intr+0x0/0xa
     [] datagram_poll+0x0/0xc8
   [] mwait_idle+0x42/0x45
   [] cpu_idle+0x8b/0xae
   [] start_kernel+0x2b9/0x2c5
   [] _sinittext+0x15e/0x162

  Code: 0f 0b eb fe 48 8b 07 48 63 d2 48 f7 d0 48 8b 3c d0 e8 13 ff
  RIP  [] queue_work+0x32/0x51
   RSP 
  Kernel panic - not syncing: Aiee, killing interrupt handler!

Signed-off-by: Bernhard Walle 
Acked-by: Eric Biederman 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] swsusp: fix suspend when console is in VT_AUTO+KD_GRAPHICS mode

2007-03-17T02:25:05+00:00

When the console is in VT_AUTO+KD_GRAPHICS mode, switching to the
SUSPEND_CONSOLE fails, resulting in vt_waitactive() waiting indefinitely or
until the task is interrupted.  This patch tests if a console switch can
occur in set_console() and returns early if a console switch is not
possible.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Andrew Johnson 
Acked-by: Pavel Machek 
Cc: "Antonino A. Daplas" 
Cc: "Rafael J. Wysocki" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Fix SAK_work workqueue initialization.

2007-02-14T00:07:36+00:00

Somewhere in the rewrite of the work queues my cleanup of SAK handling
got broken.  Maybe I didn't retest it properly or possibly the API
was changing so fast I missed something.  Regardless currently
triggering a SAK now generates an ugly BUG_ON and kills the kernel.

Thanks to Alexey Dobriyan  for spotting this.

This modifies the use of SAK_work to initialize it when the data
structure it resides in is initialized, and to simply call
schedule_work when we need to generate a SAK.  I update both
data structures that have a SAK_work member for consistency.

All of the old PREPARE_WORK calls that are now gone.

If we call schedule_work again before it has processed it
has generated the first SAK it will simply ignore the duplicate
schedule_work request.

Signed-off-by: Eric W. Biederman 
Signed-off-by: Linus Torvalds

[PATCH] tty: update the tty layer to work with struct pid

2007-02-12T17:48:32+00:00

Of kernel subsystems that work with pids the tty layer is probably the largest
consumer.  But it has the nice virtue that the assiation with a session only
lasts until the session leader exits.  Which means that no reference counting
is required.  So using struct pid winds up being a simple optimization to
avoid hash table lookups.

In the long term the use of pid_nr also ensures that when we have multiple pid
spaces mixed everything will work correctly.

Signed-off-by: Eric W. Biederman 
Cc: Alan Cox 
Cc: Oleg Nesterov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Char: timers cleanup

2007-02-12T17:48:30+00:00

- Use timer macros to set function and data members and to modify
  expiration time.
- Use DEFINE_TIMER for global timers and do not init them at run-time in
  these cases.
- del_timer_sync is common in most cases -- we want to wait for timer
  function if it's still running.

Signed-off-by: Jiri Slaby 
Cc: Dave Airlie 
Cc: David Woodhouse 
Cc: Dominik Brodowski 
Cc: Alessandro Zummo 
Cc: Paul Fulghum 
Cc: Kylene Jo Hall 
Cc: Wim Van Sebroeck 
Acked-by: Dmitry Torokhov 	(Input bits)
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] drivers/char/vc_screen.c: proper prototypes

2007-02-11T18:51:27+00:00

Add proper prototypes for two functions in drivers/char/vc_screen.c

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] getting rid of all casts of k[cmz]alloc() calls

2006-12-13T17:05:58+00:00

Run this:

	#!/bin/sh
	for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
	  echo "De-casting $f..."
	  perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
	done

And then go through and reinstate those cases where code is casting pointers
to non-pointers.

And then drop a few hunks which conflicted with outstanding work.

Cc: Russell King , Ian Molton 
Cc: Mikael Starvik 
Cc: Yoshinori Sato 
Cc: Roman Zippel 
Cc: Geert Uytterhoeven 
Cc: Ralf Baechle 
Cc: Paul Mackerras 
Cc: Kyle McMartin 
Cc: Benjamin Herrenschmidt 
Cc: Martin Schwidefsky 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Greg KH 
Cc: Jens Axboe 
Cc: Paul Fulghum 
Cc: Alan Cox 
Cc: Karsten Keil 
Cc: Mauro Carvalho Chehab 
Cc: Jeff Garzik 
Cc: James Bottomley 
Cc: Ian Kent 
Cc: Steven French 
Cc: David Woodhouse 
Cc: Neil Brown 
Cc: Jaroslav Kysela 
Cc: Takashi Iwai 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] add return value checking of get_user() in set_vesa_blanking()

2006-12-07T16:39:40+00:00

[akpm@osdl.org: bugfix]
Signed-off-by: Yoichi Yuasa 
Cc: James Simmons 
Cc: "Antonino A. Daplas" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

2006-12-05T14:37:56+00:00

Conflicts:

	drivers/infiniband/core/iwcm.c
	drivers/net/chelsio/cxgb2.c
	drivers/net/wireless/bcm43xx/bcm43xx_main.c
	drivers/net/wireless/prism54/islpci_eth.c
	drivers/usb/core/hub.h
	drivers/usb/input/hid-core.c
	net/core/netpoll.c

Fix up merge failures with Linus's head and fix new compilation failures.

Signed-Off-By: David Howells

Driver core: convert vt code to use struct device

2006-12-01T22:51:59+00:00

Converts from using struct "class_device" to "struct device" making
everything show up properly in /sys/devices/ with symlinks from the
/sys/class directory.

Signed-off-by: Greg Kroah-Hartman