spinlocks

[Ashutosh S. Rajekar]

Hello,

Are there any pitfalls in using critical code locked through spinlocks,
inside a pair of lock_kernel()/unlock_kernel() calls on an SPM machine ?
I'm not familiar with SMP machines, hence the question.

Say we have the following code: is it safe, or should I use the classical
save_flags(), cli(), restore_flags() stuff ?

/* --------- */

lock_kernel();

spin_lock_irqsave(&lock, flags);

/* critical section ... */

spin_unlock_irqrestore(&lock, flags);

unlock_kernel();

/* --------- */

Please Cc your replies to my email address.

Thanks in advance,
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Ashutosh S. Rajekar
PICT, University of Pune, INDIA.
WWW: http://i.am/asr		Email: [e-mail]
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