Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock

[Waiman Long]

On 02/03/2014 03:51 AM, Raghavendra K T wrote:
> On 01/31/2014 12:19 AM, Raghavendra K T wrote:
> > On 01/30/2014 09:08 PM, Waiman Long wrote:
> > > On 01/30/2014 03:55 AM, Raghavendra K T wrote:
> > > > On 01/28/2014 11:49 PM, Waiman Long wrote:
> > [...]
> >                    from kernel/bounds.c:9:
> > > > include/linux/log2.h: In function â__ilog2_u32â:
> > > > include/linux/log2.h:34:2: error: implicit declaration of function
> > > > âflsâ [-Werror=implicit-function-declaration]
> > > > include/linux/log2.h: In function â__ilog2_u64â:
> > > > include/linux/log2.h:42:2: error: implicit declaration of function
> > > > âfls64â [-Werror=implicit-function-declaration]
> > > > include/linux/log2.h: In function â__roundup_pow_of_twoâ:
> > > > .
> > > > .
> > > > [trimmed]
> > >
> > > The code will need to be compiled in either the latest linux tree as 
> > > the
> > > patches have dependency on some new memory barrier that are in 3.14.
> > > Alternatively, you can compile with the latest tip tree.
> > >
> > > If you have already done that, please send me your config file so 
> > > that I
> > > can reproduce the compilation error in my build environment.
> >
> > I did compile on latest linux tree which had barrier.txt. May be I 'll
> > recheck if I am missing something obvious.
> >
> > Here is .config attached
>
> An Update:
> The reason for failure was that I was compiling for guest. and
> CONFIG_PARAVIRT was enabled.
Thank for the information. I will update my patch to correct that problem.

-Longman
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