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static void failed(void);
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static void failed(void);
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__u32 random(__u32 max)
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__u32 random(__u32 max)
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{
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{
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    __u32 rc;
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    __u32 rc;
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    ipl_t ipl;
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    spinlock_lock(&lock);  
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    spinlock_lock(&lock);  
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    rc = seed % max;
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    rc = seed % max;
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    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
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    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
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    spinlock_unlock(&lock);
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    spinlock_unlock(&lock);