* Qustion on function try_module_get()
@ 2008-01-12 5:52 rmingming
0 siblings, 0 replies; only message in thread
From: rmingming @ 2008-01-12 5:52 UTC (permalink / raw)
To: linux-kernel
Hi,
I have a problem about the try_module_get function, I don't know if someone
removed the module just AFTER line 372 and BEFORE line 373, then
what happens? Because in this situation, the variable "module" will be
incorrect, and module_is_live function will lead to unpredicatable behaviour.
368 static inline int try_module_get(struct module *module)
369 {
370 int ret = 1;
371
372 if (module) {
373 unsigned int cpu = get_cpu();
374 if (likely(module_is_live(module)))
375 local_inc(&module->ref[cpu].count);
376 else
377 ret = 0;
378 put_cpu();
379 }
380 return ret;
381 }
Best wishes to all,
rmingming
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2008-01-12 5:52 Qustion on function try_module_get() rmingming
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