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Date: Mon, 29 Jun 2015 16:59:29 -0700
From: Greg KH <greg@kroah.com>
To: Vinson Lee <vlee@twopensource.com>
Cc: stable@vger.kernel.org,
	"Kirill A. Shutemov" <kirill@shutemov.name>,
	Ingo Molnar <mingo@redhat.com>,
	Paul Mackerras <paulus@samba.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [stable request 3.2 3.4 3.10] perf tools: Fix build with perl
 5.18
Message-ID: <20150629235929.GD29763@kroah.com>
References: <CAHTgTXU7TbaBMk=pcWyLUQ-Bkv1OAcETsTCZK-Ymkrstw_+p+A@mail.gmail.com>
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On Thu, May 21, 2015 at 12:34:40PM -0700, Vinson Lee wrote:
> Hi.
> 
> Please backport upstream 3.12 commit
> 575bf1d04e908469d26da424b52fc1b12a1db9d8 "perf tools: Fix build with
> perl 5.18" to stable kernels 3.2, 3.4, and 3.10.
> 
> commit 575bf1d04e908469d26da424b52fc1b12a1db9d8
> Author: Kirill A. Shutemov <kirill@shutemov.name>
> Date:   Mon Jun 24 11:43:14 2013 +0300
> 
>     perf tools: Fix build with perl 5.18
> 
>     perl.h from new Perl release doesn't like -Wundef and -Wswitch-default:
> 
>     /usr/lib/perl5/core_perl/CORE/perl.h:548:5: error:
> "SILENT_NO_TAINT_SUPPORT" is not defined [-Werror=undef]
>      #if SILENT_NO_TAINT_SUPPORT && !defined(NO_TAINT_SUPPORT)
>          ^
>     /usr/lib/perl5/core_perl/CORE/perl.h:556:5: error:
> "NO_TAINT_SUPPORT" is not defined [-Werror=undef]
>      #if NO_TAINT_SUPPORT
>          ^
>     In file included from /usr/lib/perl5/core_perl/CORE/perl.h:3471:0,
>                      from util/scripting-engines/trace-event-perl.c:30:
>     /usr/lib/perl5/core_perl/CORE/sv.h:1455:5: error:
> "NO_TAINT_SUPPORT" is not defined [-Werror=undef]
>      #if NO_TAINT_SUPPORT
>          ^
>     In file included from /usr/lib/perl5/core_perl/CORE/perl.h:3472:0,
>                      from util/scripting-engines/trace-event-perl.c:30:
>     /usr/lib/perl5/core_perl/CORE/regexp.h:436:5: error:
> "NO_TAINT_SUPPORT" is not defined [-Werror=undef]
>      #if NO_TAINT_SUPPORT
>          ^
>     In file included from /usr/lib/perl5/core_perl/CORE/hv.h:592:0,
>                      from /usr/lib/perl5/core_perl/CORE/perl.h:3480,
>                      from util/scripting-engines/trace-event-perl.c:30:
>     /usr/lib/perl5/core_perl/CORE/hv_func.h: In function
> ‘S_perl_hash_siphash_2_4’:
>     /usr/lib/perl5/core_perl/CORE/hv_func.h:222:3: error: switch
> missing default case [-Werror=switch-default]
>        switch( left )
>        ^
>     /usr/lib/perl5/core_perl/CORE/hv_func.h: In function
> ‘S_perl_hash_superfast’:
>     /usr/lib/perl5/core_perl/CORE/hv_func.h:274:5: error: switch
> missing default case [-Werror=switch-default]
>          switch (rem) { \
>          ^
>     /usr/lib/perl5/core_perl/CORE/hv_func.h: In function ‘S_perl_hash_murmur3’:
>     /usr/lib/perl5/core_perl/CORE/hv_func.h:398:5: error: switch
> missing default case [-Werror=switch-default]
>          switch(bytes_in_carry) { /* how many bytes in carry */
>          ^
> 
>     Let's disable the warnings for code which uses perl.h.
> 
>     Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
>     Cc: Ingo Molnar <mingo@redhat.com>
>     Cc: Paul Mackerras <paulus@samba.org>
>     Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
>     Link: http://lkml.kernel.org/r/1372063394-20126-1-git-send-email-kirill@shutemov.name
>     Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Doesn't apply to 3.10-stable :(