what is spinlock depth

[Rajat Sharma]

lockdep finds out dependency in locking order at runtime. More on this
in kernel documentation linux/Documentation/lockdep-design.txt

Rajat

On Tue, Feb 1, 2011 at 1:57 AM, Sri Ram Vemulpali
<sri.ram.gmu06 at gmail.com> wrote:
> Hi all,
>
> I am reading spinlock code and looking at struct raw_spinlock. I found
> struct lockdep_map as member.
> which is defined as
>
> struct lockdep_map {
>       struct lock_class_key           *key;
>       struct lock_class               *class_cache[NR_LOCKDEP_CACHING_CLASSES];
>       const char                      *name;
> #ifdef CONFIG_LOCK_STAT
>       int                             cpu;
>      unsigned long                   ip;
> #endif
> };
>
> Can anyone help me explain, how this struct helps the spinlock. Why do
> we need lockdepth.
> Thanks for help in advance.
> --
> Regards,
> Sri.
>
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