[ltt-dev] [PATCH] Lib urcu commit 453629a9317adef5b96c3d55e4dcd98db680997a moved container_of definition to urcu/compiler.h Since, multiple warnings about redefinition of container_of appears.

[mathieu.desnoyers@efficios.com (Mathieu Desnoyers)]

* David Goulet (david.goulet at polymtl.ca) wrote:
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> 
> On 10-08-16 12:24 AM, Mathieu Desnoyers wrote:
> > * David Goulet (david.goulet at polymtl.ca) wrote:
> >> Removed macro definition from ust core header and kcompat.
> >> Now using lib urcu macro definition which is the same.
> > 
> > Hrm, there is a dependency on the latest unreleased urcu git head.
> > 
> > To make the transition easier, please wrap it into a
> > 
> > #ifndef container_of
> > ...
> > #endif
> > 
> > instead of removing it from ust.
> 
> Right. Quite "smoother" that way!
> 
> Should we wait until the next urcu release ?

No, please repost with ifdefs as soon as you can, so there won't be any warning
between the newer urcu and ust.

Thanks,

Mathieu

> 
> David
> 
> > 
> > Thanks,
> > 
> > Mathieu
> > 
> >>
> >> Signed-off-by: David Goulet <david.goulet at polymtl.ca>
> >> ---
> >>  include/ust/core.h           |    4 ----
> >>  include/ust/kcompat/simple.h |   12 ------------
> >>  2 files changed, 0 insertions(+), 16 deletions(-)
> >>
> >> diff --git a/include/ust/core.h b/include/ust/core.h
> >> index 0172614..b538e81 100644
> >> --- a/include/ust/core.h
> >> +++ b/include/ust/core.h
> >> @@ -141,8 +141,4 @@ static __inline__ int get_count_order(unsigned int count)
> >>  	return order;
> >>  }
> >>  
> >> -#define container_of(ptr, type, member) ({                      \
> >> -        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
> >> -        (type *)( (char *)__mptr - offsetof(type,member) );})
> >> -
> >>  #endif /* UST_CORE_H */
> >> diff --git a/include/ust/kcompat/simple.h b/include/ust/kcompat/simple.h
> >> index 762d802..38a9be5 100644
> >> --- a/include/ust/kcompat/simple.h
> >> +++ b/include/ust/kcompat/simple.h
> >> @@ -21,18 +21,6 @@
> >>  #ifndef KCOMPAT_SIMPLE_H
> >>  #define KCOMPAT_SIMPLE_H
> >>  
> >> -/**
> >> - * container_of - cast a member of a structure out to the containing structure
> >> - * @ptr:	the pointer to the member.
> >> - * @type:	the type of the container struct this is embedded in.
> >> - * @member:	the name of the member within the struct.
> >> - *
> >> - */
> >> -#define container_of(ptr, type, member) ({			\
> >> -	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
> >> -	(type *)( (char *)__mptr - offsetof(type,member) );})
> >> -
> >> -
> >>  /* libkcompat: from rcupdate.h */
> >>  
> >>  struct rcu_head {
> >> -- 
> >> 1.7.0.4
> >>
> > 
> 
> - -- 
> David Goulet
> LTTng project, DORSAL Lab.
> 
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com