As part of my work, I need to annotate the reports generated using Coccinelle Scripts as bugs/FPs for recent Linux Kernels, recent as in versions > 3.0 till the current one 3.18.
As I’m reading the reports (newer ones), so today I completed Linux_lockintr.new.org.
This file had many todos, so it took me some time to complete it. This org file contains report for cases where a lock that is taken but not released. In simple words, cases where a unlock was missing. Interrupts are disabled at the same time. I have written some blog post related to this pattern.
Most of them had the cases where spin_lock_irqsave, spin_lock_irq are used.
What is spin_lock_irq and spin_lock_irqsave?
This is a very good read on this, plus I have also written a blog post on this, linked above.
What did I find?
There were both FPs and Bugs. This was pretty simple to classify, some needed careful check.
There are some patches lined up for this case too.
