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Typo

Posted Jun 10, 2009 20:32 UTC (Wed) by intgr (subscriber, #39733)
Parent article: Linux kernel design patterns - part 1

3      if (atomic_dec_and_lock(&obj->refcnt), &subsystem_lock) {

Either we've got variable argument if statements now, or someone put the closing parenthese in the wrong place.

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It's a comma operator.

Posted Jun 11, 2009 0:56 UTC (Thu) by xoddam (subscriber, #2322) [Link]

This is C. In C, we have many ways of camouflaging incorrect code, including the infamous http://en.wikipedia.org/wiki/Comma_operator.