linux-kernel - atomic_inc and spin_lock

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Message-ID: <CAB_-8bLk-HVWB6Mmt=rjDguou1kbGQ9c7o5nQxV3zAg+Txf7GQ@mail.gmail.com>
Date:	Thu, 18 Dec 2014 21:07:46 +0000
From:	"Rogelio M. Serrano Jr." <rogelios664@...il.com>
To:	linux-kernel@...r.kernel.org, PaX Team <pageexec@...email.hu>
Subject: atomic_inc and spin_lock_irq

whats the difference between:

atomic_inc(&port->count);

and

spin_lock_irq(&port->lock);
++port->count;
spin_unlock_irq(&port->lock);
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