Herbert Xu wrote:
Jeff Garzik <[EMAIL PROTECTED]> wrote:
Let me add to the chorus of voices: I continually see two cases where
real bugs crop up:
1) hacker uses spin_lock_irq() in incorrect context (where it is not
safe to do a blind enable/disable)
2) hacker uses spin_lock_irq() correctly, but the surrounding code
changes, thus invalidating prior assumptions.
I would even go so far as to support the drastic measure of deleting
spin_lock_irq().
spin_lock_irqsave() generates fewer bugs, is more future-proof, and by
virtue of 'flags' permits architectures a bit more flexibility.
Could we add a debug option that warned if spin_lock_irq is
executed with IRQs turned off already?
Seems reasonable but perhaps arch-specific?
Also, I think someone (akpm?) mentioned an effort had been made before,
and run into some problems. I don't have details...
Jeff
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