Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0

[Ingo Molnar]

* Florian Schmidt <mista.tapas@xxxxxxx> wrote:

> hi, i saw these during boot (config and complete dmesg attached):
> 
> Freeing unused kernel memory: 348k freed
> Adding 289160k swap on /dev/hda3.  Priority:-1 extents:1
> EXT3 FS on hdc1, internal journal
> IRQ#8 thread RT prio: 45.
> BUG: sleeping function called from invalid context modprobe(116) at kernel/mutex.c:28
> in_atomic():1 [00000001], irqs_disabled():1
>  [<c0117182>] __might_sleep+0xc2/0xe0 (12)
>  [<c0134989>] resolve_symbol+0xb9/0xc0 (24)
>  [<c01309f8>] _mutex_lock+0x38/0x50 (12)
>  [<c0144995>] kmem_cache_alloc+0x45/0x100 (24)
>  [<c0134989>] resolve_symbol+0xb9/0xc0 (8)

does the patch below fix this?

	Ingo

--- linux/kernel/module.c.orig
+++ linux/kernel/module.c
@@ -53,7 +53,7 @@
 #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
 
 /* Protects module list */
-static DECLARE_RAW_SPINLOCK(modlist_lock);
+static DECLARE_SPINLOCK(modlist_lock);
 
 /* List of modules, protected by module_mutex AND modlist_lock */
 static DECLARE_MUTEX(module_mutex);
-
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