Re: SMP race with module loading/unloading

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 14 Dec 1998 21:06:14 +0000 (GMT)

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In reply to: Zack Weinberg: "SMP race with module loading/unloading"

> It would be fairly straightforward to fix this, but the changes involved
> would affect a lot of code. M_[ID]_U_C need to use atomic_inc and
> atomic_dec. There needs to be a 'module lock' which controls the module
> syscalls and nothing else.

The atomic inc/dec seems easy enough. A semaphore would serialize module
load/unload operations (beware of request_module) but IMHO request_module
is wrong anyway.

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