Messages in this thread | | | Subject | Re: kernel BUG at /usr/src/linux-2.5.37/include/asm/spinlock.h:123! | From | Mika Liljeberg <> | Date | 23 Sep 2002 21:11:53 +0300 |
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On Mon, 2002-09-23 at 18:41, Bob Miller wrote: > Mika,
Hi Bob,
> I haven't looked at the code yet... but most of the time when you see this > error it is because the kernel is compiled with CONFIG_DEBUG_SPINLOCK and > the code is using a lock that hasn't be initilized correctly (i.e.: > SPIN_LOCK_UNLOCKED().
Yup. I usually compile new kernels with spinlock debugging.
Looks like a number of the ioctls in oss/audio.c have locking problems. At least the following ones look buggy:
SNDCTL_DSP_SETTRIGGER SNDCTL_DSP_GETIPTR SNDCTL_DSP_GETOPTR SNDCTL_DSP_GETODELAY
Each of these tries to manipulate a spinlock through the uninitialized dmap pointer. SNDCTL_DSP_SETTRIGGER actually operates on both dmap_in and dmap_out. It should presumably acquire locks for both.
Looks like a copy/paste error, probably a result of a hasty conversion cli()/sti()'s to spinlocks.
Regards,
MikaL
> > -- > Bob Miller Email: rem@osdl.org > Open Source Development Lab Phone: 503.626.2455 Ext. 17
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