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Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC)

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To: Stas Sergeev <stsp@...>
Cc: <linux-kernel@...>
Date: Tuesday, May 6, 2008 - 6:20 am

At Fri, 02 May 2008 20:57:00 +0400,
Stas Sergeev wrote:

[Oops, overseen this follow up]

One problem is that we cannot load two drivers to a single device
right now.  Even if you have input pcspkr and snd-pcsp modules, you
have to blacklist one of two modules so that udev loads the one
properly.  Because of this, snd-pcsp will be unlikely activated for
most systems as default.

For avoiding this, you'll have a few choices:
a) implement pcspkr-core driver, and make input-pcspkr and snd-pcsp on
   that core module
b) make snd-pcsp copmletely rely on input pcspkr, implement as an
   add-on by adding hook to each driver callback and event handler of
   pcspkr
c) implement snd-pcsp as another individual platform driver and adds a
   hook to pcskr event handler of pcspkr

The case (a) would make things more complicated and give less
solution.

In the case (b), the modification of pcspkr.c would be big, and
would be ugly.

The case (c) was my proposal.  But in this case, the driver will
become likely self consistent; it allocates its own device at init.

In anyway, there is no sexy way to auto-load snd-pcsp (partly because
it's the purpose -- avoid loading the sound subsystem unless really
necessary).  That's why I called it hackish.


Takashi
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Messages in current thread:
2.6.25-mm1, Andrew Morton, (Fri Apr 18, 4:47 am)
[Was: 2.6.25-mm1], Jiri Slaby, (Mon Apr 21, 4:31 am)
Re: [Was: 2.6.25-mm1], Al Viro, (Mon Apr 21, 5:06 am)
fault in __d_lookup [Was: 2.6.25-mm1], Jiri Slaby, (Mon Apr 21, 5:37 am)
Re: fault in __d_lookup [Was: 2.6.25-mm1], Al Viro, (Mon Apr 21, 5:45 am)
Re: fault in __d_lookup [Was: 2.6.25-mm1], Jiri Slaby, (Mon Apr 21, 5:59 am)
Re: fault in __d_lookup [Was: 2.6.25-mm1], Matthew Wilcox, (Mon Apr 21, 1:23 pm)
Re: fault in __d_lookup [Was: 2.6.25-mm1], Rafael J. Wysocki, (Mon Apr 21, 9:42 am)
internal compiler error: SIGSEGV [Was: 2.6.25-mm1], Jiri Slaby, (Sun Apr 20, 7:29 am)
Re: 2.6.25-mm1, Joseph Fannin, (Fri Apr 18, 11:10 pm)
Re: 2.6.25-mm1, Andrew Morton, (Fri Apr 18, 11:29 pm)
Re: 2.6.25-mm1, Arjan van de Ven, (Sat Apr 19, 2:21 pm)
Re: 2.6.25-mm1, Andres Salomon, (Sat Apr 19, 9:25 am)
Re: 2.6.25-mm1, Andrew Morton, (Sat Apr 19, 1:38 pm)
Re: 2.6.25-mm1, Andres Salomon, (Sat Apr 19, 1:50 pm)
Re: 2.6.25-mm1, Jordan Crouse, (Mon Apr 21, 10:56 am)
Re: 2.6.25-mm1, Andres Salomon, (Mon Apr 21, 11:05 am)
Re: 2.6.25-mm1, Jordan Crouse, (Mon Apr 21, 11:12 am)
[PATCH 2/2] OLPC: drop pre-OpenFirmware workarounds, Andres Salomon, (Sat Apr 19, 1:39 pm)
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Re: OLPC: Add support for calling into Open Firmware, H. Peter Anvin, (Mon Apr 21, 10:58 am)
Re: 2.6.25-mm1, Joseph Fannin, (Fri Apr 18, 10:25 pm)
Re: 2.6.25-mm1, Andrew Morton, (Fri Apr 18, 11:08 pm)
Re: 2.6.25-mm1, Joseph Fannin, (Fri Apr 18, 10:13 pm)
Re: 2.6.25-mm1, Andrew Morton, (Fri Apr 18, 11:02 pm)
Re: 2.6.25-mm1, Dmitry Torokhov, (Sat Apr 19, 12:14 am)
Re: 2.6.25-mm1, Andrew Morton, (Sat Apr 19, 12:29 am)
Re: 2.6.25-mm1, Takashi Iwai, (Mon Apr 21, 10:06 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Mon Apr 21, 1:55 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Tue Apr 22, 6:13 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Tue Apr 22, 2:31 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Wed Apr 23, 4:49 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Wed Apr 23, 4:02 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Thu Apr 24, 5:40 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Thu Apr 24, 11:51 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Fri Apr 25, 2:28 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Fri Apr 25, 12:45 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Dmitry Torokhov, (Fri Apr 25, 2:09 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Fri Apr 25, 2:31 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Dmitry Torokhov, (Fri Apr 25, 2:37 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Fri Apr 25, 12:51 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Fri May 2, 12:44 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Fri May 2, 12:57 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Tue May 6, 6:20 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Tue May 6, 12:51 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Fri Apr 25, 1:25 pm)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Takashi Iwai, (Wed Apr 23, 10:18 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Dmitry Torokhov, (Tue Apr 22, 10:01 am)
Re: 2.6.25-mm1 (snd-pcsp doesn't like DEBUG_PAGEALLOC), Stas Sergeev, (Tue Apr 22, 12:42 pm)
Re: 2.6.25-mm1, Takashi Iwai, (Mon Apr 21, 7:07 am)
Re: 2.6.25-mm1, Stas Sergeev, (Mon Apr 21, 3:45 pm)
Re: 2.6.25-mm1 (snd-pcsp causes driver conflict), Stas Sergeev, (Mon Apr 21, 1:44 pm)
Re: 2.6.25-mm1 (snd-pcsp causes driver conflict), Takashi Iwai, (Tue Apr 22, 6:09 am)
Re: 2.6.25-mm1 (snd-pcsp causes driver conflict), Stas Sergeev, (Tue Apr 22, 1:54 pm)
Re: 2.6.25-mm1 (snd-pcsp causes driver conflict), Takashi Iwai, (Wed Apr 23, 4:55 am)
Re: 2.6.25-mm1 (snd-pcsp causes driver conflict), Takashi Iwai, (Wed Apr 23, 10:14 am)
Re: 2.6.25-mm1, Joseph Fannin, (Sat Apr 19, 2:33 am)
2.6.25-mm1: orphaned files after build, Alexey Dobriyan, (Fri Apr 18, 7:09 pm)
Re: 2.6.25-mm1, , (Fri Apr 18, 4:14 pm)
Re: 2.6.25-mm1 (build error: trace selftest), Randy Dunlap, (Fri Apr 18, 12:45 pm)
Re: 2.6.25-mm1 (build error: driver core), Randy Dunlap, (Fri Apr 18, 12:40 pm)
Re: 2.6.25-mm1 (build error: driver core), Greg KH, (Fri Apr 18, 12:56 pm)
Re: 2.6.25-mm1 (build error: driver core), Dan Williams, (Fri Apr 18, 2:38 pm)
StackProtector Oopses - Re: 2.6.25-mm1, Reuben Farrelly, (Fri Apr 18, 9:02 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Ingo Molnar, (Fri Apr 18, 9:36 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Reuben Farrelly, (Fri Apr 18, 10:49 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Ingo Molnar, (Mon Apr 21, 11:06 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Arjan van de Ven, (Mon Apr 21, 9:48 pm)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Ingo Molnar, (Tue Apr 22, 4:34 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Arjan van de Ven, (Tue Apr 22, 10:29 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Arjan van de Ven, (Fri Apr 18, 9:51 am)
Re: StackProtector Oopses - Re: 2.6.25-mm1, Reuben Farrelly, (Fri Apr 18, 10:41 am)
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