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    SubjectRe: [ANNOUNCE] Linux 2.6 Real Time Kernel
    Date

    I got this thing to build by adding a few EXPORT_SYMBOL, patch below.
    Now it seems to be running quite well. I am, however, getting
    occasional "bad: scheduling while atomic!" messages, all alike:

    bad: scheduling while atomic!
    [<c02ef301>] schedule+0x4e5/0x4ea
    [<c0114cbe>] try_to_wake_up+0x99/0xa8
    [<c01332e2>] __p_mutex_down+0xfe/0x190
    [<c029e238>] alloc_skb+0x32/0xc3
    [<c01335e0>] kmutex_is_locked+0x1f/0x33
    [<c029fa63>] skb_queue_tail+0x1c/0x45
    [<c02eb43e>] unix_stream_sendmsg+0x22c/0x38c
    [<c029ab03>] sock_sendmsg+0xc9/0xe3
    [<c029f95a>] skb_dequeue+0x4a/0x5b
    [<c02eb9e6>] unix_stream_recvmsg+0x119/0x430
    [<c0137f06>] __alloc_pages+0x1cc/0x33f
    [<c01168ca>] autoremove_wake_function+0x0/0x43
    [<c029af4b>] sock_readv_writev+0x6e/0x97
    [<c029afec>] sock_writev+0x37/0x3e
    [<c029afb5>] sock_writev+0x0/0x3e
    [<c014ebb8>] do_readv_writev+0x1db/0x21f
    [<c01168ca>] autoremove_wake_function+0x0/0x43
    [<c014e5ca>] vfs_read+0xd0/0xf5
    [<c014ec94>] vfs_writev+0x49/0x52
    [<c014ed5a>] sys_writev+0x47/0x76
    [<c0103f09>] sysenter_past_esp+0x52/0x71

    USB, sound and wireless are all working nicely.

    Now the patch:

    --- kernel/kmutex.c~ 2004-10-09 12:51:37 +02:00
    +++ kernel/kmutex.c 2004-10-09 13:50:43 +02:00
    @@ -20,6 +20,7 @@
    #include <linux/config.h>
    #include <linux/kmutex.h>
    #include <linux/sched.h>
    +#include <linux/module.h>

    # if defined CONFIG_PMUTEX
    # include <linux/pmutex.h>
    @@ -40,11 +41,14 @@
    return p_mutex_trylock(&(lock->kmtx));
    }

    +EXPORT_SYMBOL(kmutex_trylock);

    inline int kmutex_is_locked(struct kmutex *lock)
    {
    return p_mutex_is_locked(&(lock->kmtx));
    }
    +
    +EXPORT_SYMBOL(kmutex_is_locked);
    # endif


    @@ -60,6 +64,7 @@
    #endif
    }

    +EXPORT_SYMBOL(kmutex_init);

    /*
    * print warning is case kmutex_lock is called while preempt count is
    @@ -88,6 +93,8 @@
    #endif
    }

    +EXPORT_SYMBOL(kmutex_lock);
    +
    void kmutex_unlock(struct kmutex *lock)
    {
    #if defined CONFIG_KMUTEX_DEBUG
    @@ -102,6 +109,7 @@
    #endif
    }

    +EXPORT_SYMBOL(kmutex_unlock);

    void kmutex_unlock_wait(struct kmutex * lock)
    {
    @@ -111,4 +119,4 @@
    }
    }

    -
    +EXPORT_SYMBOL(kmutex_unlock_wait);

    --
    Måns Rullgård
    mru@mru.ath.cx

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