linux.git/arch/powerpc/kernel/traps.c, branch v2.6.22

move die notifier handling to common code

2007-05-08T18:15:04+00:00

This patch moves the die notifier handling to common code.  Previous
various architectures had exactly the same code for it.  Note that the new
code is compiled unconditionally, this should be understood as an appel to
the other architecture maintainer to implement support for it aswell (aka
sprinkling a notify_die or two in the proper place)

arm had a notifiy_die that did something totally different, I renamed it to
arm_notify_die as part of the patch and made it static to the file it's
declared and used at.  avr32 used to pass slightly less information through
this interface and I brought it into line with the other architectures.

[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix vmalloc_sync_all bustage]
[bryan.wu@analog.com: fix vmalloc_sync_all in nommu]
Signed-off-by: Christoph Hellwig 
Cc: 
Cc: Russell King 
Signed-off-by: Bryan Wu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[POWERPC] Fix backwards ? : when printing machine type

2007-03-26T02:34:31+00:00

Looks like someone got this backwards, highlighting the perils of the
? : !!! :)

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

[POWERPC] Handle recursive oopses

2007-03-26T02:34:30+00:00

Handle recursive oopses, like on x86. We had a few cases recently where
we locked up in oops printing and didnt make it into crashdump.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

[POWERPC] Clean up pmac_backlight_unblank in oops path

2007-03-26T02:34:29+00:00

Move pmac_backlight_unblank into its own function and only take the
pmac_backlight_mutex when we are on a pmac for that added bit of
paranoia.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

[POWERPC] Add missing oops_enter/oops_exit

2007-03-26T02:34:27+00:00

Add missing oops_enter/oops_exit, makes pause_on_oops boot parameter work.

Signed-off-by: Anton Blanchard 
Signed-off-by: Paul Mackerras

backlight: Separate backlight properties from backlight ops pointers

2007-02-20T09:26:53+00:00

Per device data such as brightness belongs to the indivdual device
and should therefore be separate from the the backlight operation
function pointers. This patch splits the two types of data and
allows simplifcation of some code.

Signed-off-by: Richard Purdie

backlight: Fix external uses of backlight internal semaphore

2007-02-20T08:38:45+00:00

backlight_device->sem has a very specific use as documented in the
header file. The external users of this are using it for a different
reason, to serialise access to the update_status() method.

backlight users were supposed to implement their own internal
serialisation of update_status() if needed but everyone is doing
things differently and incorrectly. Therefore add a global mutex to
take care of serialisation for everyone, once and for all.

Locking for get_brightness remains optional since most users don't
need it.

Also update the lcd class in a similar way.

Signed-off-by: Richard Purdie

[POWERPC] Fixup error handling when emulating a floating point instruction

2007-02-07T07:47:59+00:00

When we do full FP emulation its possible that we need to post a SIGFPE based
on the results of the emulation.  The previous code ignored this case completely.

Additionally, the Soft_emulate_8xx case had two issues.  One, we should never
generate a SIGFPE since the code only does data movement.  Second, we were
interpreting the return codes incorrectly, it returns 0 on success, 1 on
illop and -EFAULT on a data access error.

Signed-off-by: Kumar Gala

[POWERPC] Enable interrupts if we are doing fp math emulation

2007-02-07T07:13:32+00:00

Anytime we are emulating an instruction we are going to be doing some form of
get_user() to get the instruction image to decode.  Since get_user() might
sleep we need to ensure we have interrupts enabled or we might see something
like:

Debug: sleeping function called from invalid context at arch/powerpc/kernel/traps.c:697
in_atomic():0, irqs_disabled():1
Call Trace:
[D6023EB0] [C0007F84] show_stack+0x58/0x174 (unreliable)
[D6023EE0] [C0022C34] __might_sleep+0xbc/0xd0
[D6023EF0] [C000D158] program_check_exception+0x1d8/0x4fc
[D6023F40] [C000E744] ret_from_except_full+0x0/0x4c
--- Exception: 700 at 0x102a7100
    LR = 0xdb9ef04

However, we want to ensure that interrupts are disabled when handling a trap
exception that might be used for a kernel breakpoint.  This is why ProgramCheck
is marked as EXC_XFER_STD instead of EXC_XFER_EE.

Signed-off-by: Kumar Gala

[POWERPC] Use is_init() instead of pid==1

2007-01-24T10:13:56+00:00

Use is_init() rather than hard coded pid comparison.

Cc: Anton Blanchard 
Signed-off-by: Akinobu Mita 
Signed-off-by: Paul Mackerras