Re: [kbuild-all] drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[Andrey Ryabinin]

2015-10-05 14:09 GMT+03:00 Fengguang Wu :
> Hi Abylay,
>
>> cause of this 'Kernel Address sanitizer (KASan)' is enabled in your
>> config. With gcc-4.9 kasan was disabled in compile time because of:
>> "scripts/Makefile.kasan:23: CONFIG_KASAN: compiler does not support
>> all options. Trying minimal configuration"
>>
>> but with gcc-5 it's enabled.
>>
>> and
>> objdump -d drivers/media/dvb-frontends/cxd2841er.o
>>
>> shows that KASan adds some instructions to 'cxd2841er_sleep_tc' which
>> writes necessary data to -fasan-shadow-offset=0xdc00:
>> 1476:   48 b8 00 00 00 00 00movabs $0xdc00,%rax
>> ...
>> 14d3:   c7 00 f1 f1 f1 f1   movl   $0xf1f1f1f1,(%rax)
>> 14d9:   c7 40 04 01 f4 f4 f4movl   $0xf4f4f401,0x4(%rax)
>> 14e0:   c7 40 08 f2 f2 f2 f2movl   $0xf2f2f2f2,0x8(%rax)
>> 14e7:   c7 40 0c 01 f4 f4 f4movl   $0xf4f4f401,0xc(%rax)
>> ...
>>
>> and function will grow and we get '-Wframe-larger-than=2048' warnings.
>>
>> So, this warning looks normal  (until they less than 8K I think) for
>> configurations with KASan enabled.
>>
>> I can suggest:
>> * ignore this warning if KASan enabled
>
> Yes I can easily teach the kbuild robot to ignore this warning when
> KASan enabled. Thanks for the explanations!
>
>> * Increase -Wframe-larger-than=2048 to -Wframe-larger-than=8192 if
>> KASan enabled ( CONFIG_FRAME_WARN=8192 in kernel .config)
>
> Would it be possible to auto increase the threshold (in below Kconfig) when
> KASan is enabled, so that all other developers/testers won't get the warnings,
> too?
>

Makes sense, although 8K is too much, I think. 6K probably enough.

> lib/Kconfig.debug
>
> config FRAME_WARN
> int "Warn for stack frames larger than (needs gcc 4.4)"
> range 0 8192
> default 1024 if !64BIT
> default 2048 if 64BIT
>
> Thanks,
> Fengguang
>
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Re: [kbuild-all] drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[Fengguang Wu]

Hi Abylay,

> cause of this 'Kernel Address sanitizer (KASan)' is enabled in your
> config. With gcc-4.9 kasan was disabled in compile time because of:
> "scripts/Makefile.kasan:23: CONFIG_KASAN: compiler does not support
> all options. Trying minimal configuration"
> 
> but with gcc-5 it's enabled.
> 
> and
> objdump -d drivers/media/dvb-frontends/cxd2841er.o
> 
> shows that KASan adds some instructions to 'cxd2841er_sleep_tc' which
> writes necessary data to -fasan-shadow-offset=0xdc00:
> 1476:   48 b8 00 00 00 00 00movabs $0xdc00,%rax
> ...
> 14d3:   c7 00 f1 f1 f1 f1   movl   $0xf1f1f1f1,(%rax)
> 14d9:   c7 40 04 01 f4 f4 f4movl   $0xf4f4f401,0x4(%rax)
> 14e0:   c7 40 08 f2 f2 f2 f2movl   $0xf2f2f2f2,0x8(%rax)
> 14e7:   c7 40 0c 01 f4 f4 f4movl   $0xf4f4f401,0xc(%rax)
> ...
> 
> and function will grow and we get '-Wframe-larger-than=2048' warnings.
> 
> So, this warning looks normal  (until they less than 8K I think) for
> configurations with KASan enabled.
> 
> I can suggest:
> * ignore this warning if KASan enabled

Yes I can easily teach the kbuild robot to ignore this warning when
KASan enabled. Thanks for the explanations!

> * Increase -Wframe-larger-than=2048 to -Wframe-larger-than=8192 if
> KASan enabled ( CONFIG_FRAME_WARN=8192 in kernel .config)

Would it be possible to auto increase the threshold (in below Kconfig) when
KASan is enabled, so that all other developers/testers won't get the warnings,
too?

lib/Kconfig.debug

config FRAME_WARN
int "Warn for stack frames larger than (needs gcc 4.4)"
range 0 8192
default 1024 if !64BIT
default 2048 if 64BIT

Thanks,
Fengguang

> 2015-09-25 12:46 GMT+03:00 Fengguang Wu <fengguang...@intel.com>:
> > Hi Abylay,
> >
> > This warning can be reproduced with gcc-5.2:
> >
> > === commit a6dc60ff1 ===
> > /home/wfg/linux
> > HEAD is now at a6dc60ff... [media] cxd2841er: Sony CXD2841ER 
> > DVB-S/S2/T/T2/C demodulator driver
> > /home/wfg/linux/obj-compiletest
> >
> > make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o
> >
> > grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
> > /tmp/build-err-a6dc60ff1209df29ee4668024e93d31f31421932-wfg --color
> > ../drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_sleep_tc':
> > ../drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size 
> > of 2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> >  }
> >  ^
> > ../drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_set_frontend_tc':
> > ../drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size 
> > of 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> >  }
> >  ^
> >
> > === PREV commit e025273b86fb4a6440192b809e05332777c3faa5 
> > ===
> > /home/wfg/linux
> > Previous HEAD position was a6dc60ff... [media] cxd2841er: Sony CXD2841ER 
> > DVB-S/S2/T/T2/C demodulator driver
> > HEAD is now at e025273... [media] lnbh25: LNBH25 SEC controller driver
> > /home/wfg/linux/obj-compiletest
> >
> > make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o
> >
> > !!! BUILD ERROR !!!
> > grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
> > /tmp/build-err-e025273b86fb4a6440192b809e05332777c3faa5-wfg --color
> >
> > === linus/master linus/master ===
> > /home/wfg/linux
> > Previous HEAD position was e025273... [media] lnbh25: LNBH25 SEC controller 
> > driver
> > HEAD is now at 8e64a73... Merge branch 'for-linus' of 
> > git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
> > /home/wfg/linux/obj-compiletest
> >
> > make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o
> >
> > grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
> > /tmp/build-err-8e64a7331702b7888ccf84b2b9ff46ab8e167c7f-wfg --color
> > ../drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_sleep_tc':
> > ../drivers/media/dvb-frontends/cxd2841er.c:2401:1: warning: the frame size 
> > of 2984 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> >  }
> >  ^
> > ../drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_set_frontend_tc':
> > ../drivers/media/dvb-frontends/cxd2841er.c:2282:1: warning: the frame size 
> > of 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> >  }
> >  ^
> >
> > Thanks,
> > Fengguang
> >
> > On Fri, Sep 25, 2015 a

Re: [kbuild-all] drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[Abylay Ospan]

Hi Fengguang,

This is about 'Kernel Address sanitizer (KASan)'.

not only cxd2841 affected but some others:

drivers/media/tuners/r820t.c:1333:1: warning: the frame size of 2904
bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:1858:1: warning: the frame size
of 3008 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:2141:1: warning: the frame size
of 2104 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:2513:1: warning: the frame size
of 2304 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:4565:1: warning: the frame size
of 2096 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:1956:1: warning: the frame size
of 3264 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:1599:1: warning: the frame size
of 5296 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:1211:1: warning: the frame size
of 2080 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:4250:1: warning: the frame size
of 4840 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:4759:1: warning: the frame size
of 2056 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:1168:1: warning: the frame size
of 2080 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:2073:1: warning: the frame size
of 2552 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:3095:1: warning: the frame size
of 5864 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv090x.c:3436:1: warning: the frame size
of 6816 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/stv0367.c:3147:1: warning: the frame size
of 4144 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/cxd2841er.c:2404:1: warning: the frame
size of 2984 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/cxd2841er.c:2282:1: warning: the frame
size of 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
drivers/media/dvb-frontends/si2165.c:683:1: warning: the frame size of
2064 bytes is larger than 2048 bytes [-Wframe-larger-than=]

cause of this 'Kernel Address sanitizer (KASan)' is enabled in your
config. With gcc-4.9 kasan was disabled in compile time because of:
"scripts/Makefile.kasan:23: CONFIG_KASAN: compiler does not support
all options. Trying minimal configuration"

but with gcc-5 it's enabled.

and
objdump -d drivers/media/dvb-frontends/cxd2841er.o

shows that KASan adds some instructions to 'cxd2841er_sleep_tc' which
writes necessary data to -fasan-shadow-offset=0xdc00:
1476:   48 b8 00 00 00 00 00movabs $0xdc00,%rax
...
14d3:   c7 00 f1 f1 f1 f1   movl   $0xf1f1f1f1,(%rax)
14d9:   c7 40 04 01 f4 f4 f4movl   $0xf4f4f401,0x4(%rax)
14e0:   c7 40 08 f2 f2 f2 f2movl   $0xf2f2f2f2,0x8(%rax)
14e7:   c7 40 0c 01 f4 f4 f4movl   $0xf4f4f401,0xc(%rax)
...

and function will grow and we get '-Wframe-larger-than=2048' warnings.

So, this warning looks normal  (until they less than 8K I think) for
configurations with KASan enabled.

I can suggest:
* ignore this warning if KASan enabled
* Increase -Wframe-larger-than=2048 to -Wframe-larger-than=8192 if
KASan enabled ( CONFIG_FRAME_WARN=8192 in kernel .config)


2015-09-25 12:46 GMT+03:00 Fengguang Wu <fengguang...@intel.com>:
> Hi Abylay,
>
> This warning can be reproduced with gcc-5.2:
>
> === commit a6dc60ff1 ===
> /home/wfg/linux
> HEAD is now at a6dc60ff... [media] cxd2841er: Sony CXD2841ER DVB-S/S2/T/T2/C 
> demodulator driver
> /home/wfg/linux/obj-compiletest
>
> make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o
>
> grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
> /tmp/build-err-a6dc60ff1209df29ee4668024e93d31f31421932-wfg --color
> ../drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_sleep_tc':
> ../drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 
> 2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  }
>  ^
> ../drivers/media/dvb-frontends/cxd2841er.c: In function 
> 'cxd2841er_set_frontend_tc':
> ../drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size of 
> 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>  }
>  ^
>
> === PREV commit e025273b86fb4a6440192b809e05332777c3faa5 
> ===
> /home/wfg/linux
> Previous HEAD position was a6dc60ff... [media] cxd2841er: Sony CXD2841ER 
> DVB-S/S2/T/T2/C demo

Re: drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[Abylay Ospan]

Hello,

I cannot reproduce this warning. I'm compiling with your config and
following commands:

  git checkout a6dc60ff1209df29ee4668024e93d31f31421932
  make ARCH=x86_64

my gcc version is 4.9.2 (Ubuntu 4.9.2-10ubuntu13)

warning doesn't appear even if I set:
CONFIG_FRAME_WARN=128

Please point me if problem still exist.

thanks !



2015-09-17 9:05 GMT+03:00 kbuild test robot <fengguang...@intel.com>:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
> master
> head:   72714841b705a5b9bccf37ee85a62352bee3a3ef
> commit: a6dc60ff1209df29ee4668024e93d31f31421932 [media] cxd2841er: Sony 
> CXD2841ER DVB-S/S2/T/T2/C demodulator driver
> date:   5 weeks ago
> config: x86_64-randconfig-b0-09171322 (attached as .config)
> reproduce:
>   git checkout a6dc60ff1209df29ee4668024e93d31f31421932
>   # save the attached .config to linux build tree
>   make ARCH=x86_64
>
> All warnings (new ones prefixed by >>):
>
>drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_sleep_tc':
>>> drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 
>>> 2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> }
> ^
>drivers/media/dvb-frontends/cxd2841er.c: In function 
> 'cxd2841er_set_frontend_tc':
>drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size of 
> 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> }
> ^
>
> vim +2393 drivers/media/dvb-frontends/cxd2841er.c
>
>   2377  case SYS_DVBC_ANNEX_A:
>   2378  cxd2841er_active_c_to_sleep_tc(priv);
>   2379  break;
>   2380  default:
>   2381  dev_warn(>i2c->dev,
>   2382  "%s(): unknown delivery system %d\n",
>   2383  __func__, priv->system);
>   2384  }
>   2385  }
>   2386  if (priv->state != STATE_SLEEP_TC) {
>   2387  dev_err(>i2c->dev, "%s(): invalid state %d\n",
>   2388  __func__, priv->state);
>   2389  return -EINVAL;
>   2390  }
>   2391  cxd2841er_sleep_tc_to_shutdown(priv);
>   2392  return 0;
>> 2393  }
>   2394
>   2395  static int cxd2841er_send_burst(struct dvb_frontend *fe,
>   2396  enum fe_sec_mini_cmd burst)
>   2397  {
>   2398  u8 data;
>   2399  struct cxd2841er_priv *priv  = fe->demodulator_priv;
>   2400
>   2401  dev_dbg(>i2c->dev, "%s(): burst mode %s\n", __func__,
>
> ---
> 0-DAY kernel test infrastructureOpen Source Technology Center
> https://lists.01.org/pipermail/kbuild-all   Intel Corporation



-- 
Abylay Ospan,
NetUP Inc.
http://www.netup.tv
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Re: [kbuild-all] drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[Fengguang Wu]

Hi Abylay,

This warning can be reproduced with gcc-5.2:

=== commit a6dc60ff1 ===
/home/wfg/linux
HEAD is now at a6dc60ff... [media] cxd2841er: Sony CXD2841ER DVB-S/S2/T/T2/C 
demodulator driver
/home/wfg/linux/obj-compiletest

make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o

grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
/tmp/build-err-a6dc60ff1209df29ee4668024e93d31f31421932-wfg --color
../drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_sleep_tc':
../drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 
2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
../drivers/media/dvb-frontends/cxd2841er.c: In function 
'cxd2841er_set_frontend_tc':
../drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size of 
4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^

=== PREV commit e025273b86fb4a6440192b809e05332777c3faa5 
===
/home/wfg/linux
Previous HEAD position was a6dc60ff... [media] cxd2841er: Sony CXD2841ER 
DVB-S/S2/T/T2/C demodulator driver
HEAD is now at e025273... [media] lnbh25: LNBH25 SEC controller driver
/home/wfg/linux/obj-compiletest

make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o

!!! BUILD ERROR !!!
grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
/tmp/build-err-e025273b86fb4a6440192b809e05332777c3faa5-wfg --color

=== linus/master linus/master ===
/home/wfg/linux
Previous HEAD position was e025273... [media] lnbh25: LNBH25 SEC controller 
driver
HEAD is now at 8e64a73... Merge branch 'for-linus' of 
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
/home/wfg/linux/obj-compiletest

make ARCH=x86_64 drivers/media/dvb-frontends/cxd2841er.o

grep -a -F drivers/media/dvb-frontends/cxd2841er.c 
/tmp/build-err-8e64a7331702b7888ccf84b2b9ff46ab8e167c7f-wfg --color
../drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_sleep_tc':
../drivers/media/dvb-frontends/cxd2841er.c:2401:1: warning: the frame size of 
2984 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
../drivers/media/dvb-frontends/cxd2841er.c: In function 
'cxd2841er_set_frontend_tc':
../drivers/media/dvb-frontends/cxd2841er.c:2282:1: warning: the frame size of 
4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^

Thanks,
Fengguang

On Fri, Sep 25, 2015 at 12:21:57PM +0300, Abylay Ospan wrote:
> Hello,
> 
> I cannot reproduce this warning. I'm compiling with your config and
> following commands:
> 
>   git checkout a6dc60ff1209df29ee4668024e93d31f31421932
>   make ARCH=x86_64
> 
> my gcc version is 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
> 
> warning doesn't appear even if I set:
> CONFIG_FRAME_WARN=128
> 
> Please point me if problem still exist.
> 
> thanks !
> 
> 
> 
> 2015-09-17 9:05 GMT+03:00 kbuild test robot <fengguang...@intel.com>:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
> > master
> > head:   72714841b705a5b9bccf37ee85a62352bee3a3ef
> > commit: a6dc60ff1209df29ee4668024e93d31f31421932 [media] cxd2841er: Sony 
> > CXD2841ER DVB-S/S2/T/T2/C demodulator driver
> > date:   5 weeks ago
> > config: x86_64-randconfig-b0-09171322 (attached as .config)
> > reproduce:
> >   git checkout a6dc60ff1209df29ee4668024e93d31f31421932
> >   # save the attached .config to linux build tree
> >   make ARCH=x86_64
> >
> > All warnings (new ones prefixed by >>):
> >
> >drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_sleep_tc':
> >>> drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size 
> >>> of 2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> > }
> > ^
> >drivers/media/dvb-frontends/cxd2841er.c: In function 
> > 'cxd2841er_set_frontend_tc':
> >drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size 
> > of 4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
> > }
> > ^
> >
> > vim +2393 drivers/media/dvb-frontends/cxd2841er.c
> >
> >   2377  case SYS_DVBC_ANNEX_A:
> >   2378  cxd2841er_active_c_to_sleep_tc(priv);
> >   2379  break;
> >   2380  default:
> >   2381  dev_warn(>i2c->dev,
> >   2382  "%s(): unknown delivery system 
> > %d\n",
> >   2383  __func__, priv->system);
> >   2384  }
> >   2385  }
> >   2386  if (priv->state != STATE_SLEEP_TC) {
> >   2387  dev_err(>i2c->dev, "%s(): invalid state %d\n",
> >

drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 2992 bytes is larger than 2048 bytes

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   72714841b705a5b9bccf37ee85a62352bee3a3ef
commit: a6dc60ff1209df29ee4668024e93d31f31421932 [media] cxd2841er: Sony 
CXD2841ER DVB-S/S2/T/T2/C demodulator driver
date:   5 weeks ago
config: x86_64-randconfig-b0-09171322 (attached as .config)
reproduce:
  git checkout a6dc60ff1209df29ee4668024e93d31f31421932
  # save the attached .config to linux build tree
  make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_sleep_tc':
>> drivers/media/dvb-frontends/cxd2841er.c:2393:1: warning: the frame size of 
>> 2992 bytes is larger than 2048 bytes [-Wframe-larger-than=]
}
^
   drivers/media/dvb-frontends/cxd2841er.c: In function 
'cxd2841er_set_frontend_tc':
   drivers/media/dvb-frontends/cxd2841er.c:2274:1: warning: the frame size of 
4336 bytes is larger than 2048 bytes [-Wframe-larger-than=]
}
^

vim +2393 drivers/media/dvb-frontends/cxd2841er.c

  2377  case SYS_DVBC_ANNEX_A:
  2378  cxd2841er_active_c_to_sleep_tc(priv);
  2379  break;
  2380  default:
  2381  dev_warn(>i2c->dev,
  2382  "%s(): unknown delivery system %d\n",
  2383  __func__, priv->system);
  2384  }
  2385  }
  2386  if (priv->state != STATE_SLEEP_TC) {
  2387  dev_err(>i2c->dev, "%s(): invalid state %d\n",
  2388  __func__, priv->state);
  2389  return -EINVAL;
  2390  }
  2391  cxd2841er_sleep_tc_to_shutdown(priv);
  2392  return 0;
> 2393  }
  2394  
  2395  static int cxd2841er_send_burst(struct dvb_frontend *fe,
  2396  enum fe_sec_mini_cmd burst)
  2397  {
  2398  u8 data;
  2399  struct cxd2841er_priv *priv  = fe->demodulator_priv;
  2400  
  2401  dev_dbg(>i2c->dev, "%s(): burst mode %s\n", __func__,

---
0-DAY kernel test infrastructureOpen Source Technology Center
https://lists.01.org/pipermail/kbuild-all   Intel Corporation
#
# Automatically generated file; DO NOT EDIT.
# Linux/x86_64 4.2.0-rc2 Kernel Configuration
#
CONFIG_64BIT=y
CONFIG_X86_64=y
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y
CONFIG_PERF_EVENTS_INTEL_UNCORE=y
CONFIG_OUTPUT_FORMAT="elf64-x86-64"
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_WANT_HUGE_PMD_SHARE=y
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_ZONE_DMA32=y
CONFIG_AUDIT_ARCH=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_KASAN_SHADOW_OFFSET=0xdc00
CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx 
-fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 
-fcall-saved-r11"
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_PGTABLE_LEVELS=4
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_CONSTRUCTORS=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_EXTABLE_SORT=y

#
# General setup
#
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
# CONFIG_KERNEL_GZIP is not set
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
CONFIG_KERNEL_XZ=y
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SWAP is not set
# CONFIG_SYSVIPC is not set
# CONFIG_POSIX_MQUEUE is not set
CONFIG_CROSS_MEMORY_ATTACH=y
CONFIG_FHANDLE=y
# CONFIG_USELIB is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_ARCH_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_IRQ_DOMAIN_DEBUG=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_ARCH_CLOCKSOURCE_DATA=y
CONFIG_CLOCKSOURCE_VALIDATE_