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Subject: Re: [PATCH 5.11 000/252] 5.11.11-rc2 review
To:     Greg KH <greg@kroah.com>
Cc:     stable@vger.kernel.org, linux-kernel@vger.kernel.org
References: <d11fe153-b3a3-94f0-a425-ad4881a82412@gmx.de>
 <YGHoPbwu3D9DXnCB@kroah.com>
From:   Ronald Warsow <rwarsow@gmx.de>
Message-ID: <27a03651-9312-44c2-7179-61c1ed4919c7@gmx.de>
Date:   Mon, 29 Mar 2021 17:30:54 +0200
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On 29.03.21 16:46, Greg KH wrote:
> On Mon, Mar 29, 2021 at 04:40:00PM +0200, Ronald Warsow wrote:
>> hello
>>
>> 5.11.11-rc2 compiles, boots and run fine here (on an i7-6700 with Fedor=
a
>> 34 Beta)
>>
>> Thanks.
>>
>> but I see some error's/warning's with the new gcc-11.0.1 compared to th=
e
>> elder gcc-10.2.1-11
>
> Do you also see those gcc-11 warnings on Linus's tree?  I don't think
> I've started to backport any gcc-11 fixes like this to older kernels
> just yet.
>
> thanks,
>
> greg k-h
>

it seems so (I'm not an developer, just a home user compiling kernels).

AFAIK, there is a new gcc 11.x.y release with fixes for Fedora 34 in the
pipe, but not yet released, so no need to invest time.
just an report what I see here.


with linux-5.12-rc5 from https://www.kernel.org/

I see:

...

   CC      mm/gup.o
   AR      arch/x86/kernel/acpi/built-in.a
   CC      fs/proc/inode.o
In function =E2=80=98poly1305_simd_init=E2=80=99,
     inlined from =E2=80=98crypto_poly1305_setdctxkey=E2=80=99 at
arch/x86/crypto/poly1305_glue.c:150:4,
     inlined from =E2=80=98crypto_poly1305_setdctxkey=E2=80=99 at
arch/x86/crypto/poly1305_glue.c:144:21,
     inlined from =E2=80=98poly1305_update_arch=E2=80=99 at
arch/x86/crypto/poly1305_glue.c:181:8:
arch/x86/crypto/poly1305_glue.c:86:9: warning: =E2=80=98poly1305_init_x86_=
64=E2=80=99
reading 32 bytes from a region of size 16 [-Wstringop-overread]
    86 |         poly1305_init_x86_64(ctx, key);
       |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/crypto/poly1305_glue.c: In function =E2=80=98poly1305_update_arch=
=E2=80=99:
arch/x86/crypto/poly1305_glue.c:86:9: note: referencing argument 2 of
type =E2=80=98const u8 *=E2=80=99 {aka =E2=80=98const unsigned char *=E2=
=80=99}
arch/x86/crypto/poly1305_glue.c:18:17: note: in a call to function
=E2=80=98poly1305_init_x86_64=E2=80=99
    18 | asmlinkage void poly1305_init_x86_64(void *ctx,
       |                 ^~~~~~~~~~~~~~~~~~~~
   AS      arch/x86/crypto/nh-sse2-x86_64.o
...

   CC      kernel/cgroup/cpuset.o
In file included from ./include/linux/string.h:269,
                  from ./include/linux/bitmap.h:9,
                  from ./include/linux/cpumask.h:12,
                  from ./arch/x86/include/asm/cpumask.h:5,
                  from ./arch/x86/include/asm/msr.h:11,
                  from ./arch/x86/include/asm/processor.h:22,
                  from ./arch/x86/include/asm/cpufeature.h:5,
                  from ./arch/x86/include/asm/thread_info.h:53,
                  from ./include/linux/thread_info.h:59,
                  from ./arch/x86/include/asm/preempt.h:7,
                  from ./include/linux/preempt.h:78,
                  from ./include/linux/rcupdate.h:27,
                  from ./include/linux/rbtree.h:22,
                  from ./include/linux/iova.h:14,
                  from ./include/linux/intel-iommu.h:14,
                  from arch/x86/kernel/tboot.c:9:
In function =E2=80=98memcmp=E2=80=99,
     inlined from =E2=80=98tboot_probe=E2=80=99 at arch/x86/kernel/tboot.c=
:70:6:
./include/linux/fortify-string.h:19:33: warning: =E2=80=98__builtin_memcmp=
_eq=E2=80=99
specified bound 16 exceeds source size 0 [-Wstringop-overread]
    19 | #define __underlying_memcmp     __builtin_memcmp
       |                                 ^
./include/linux/fortify-string.h:235:16: note: in expansion of macro
=E2=80=98__underlying_memcmp=E2=80=99
   235 |         return __underlying_memcmp(p, q, size);
       |                ^~~~~~~~~~~~~~~~~~~
   CC      kernel/time/tick-common.o
...

   CC      drivers/acpi/acpica/utglobal.o
lib/crypto/poly1305-donna64.c:15:67: warning: argument 2 of type =E2=80=98=
const
u8[16]=E2=80=99 {aka =E2=80=98const unsigned char[16]=E2=80=99} with misma=
tched bound
[-Warray-parameter=3D]
    15 | void poly1305_core_setkey(struct poly1305_core_key *key, const
u8 raw_key[16])
       |
~~~~~~~~~^~~~~~~~~~~
In file included from lib/crypto/poly1305-donna64.c:11:
./include/crypto/internal/poly1305.h:21:68: note: previously declared as
=E2=80=98const u8 *=E2=80=99 {aka =E2=80=98const unsigned char *=E2=80=99}
    21 | void poly1305_core_setkey(struct poly1305_core_key *key, const
u8 *raw_key);
       |
~~~~~~~~~~^~~~~~~
   CC      fs/btrfs/raid56.o
..

   CC      lib/decompress_unlzma.o
arch/x86/lib/msr-smp.c:255:51: warning: argument 2 of type =E2=80=98u32 *=
=E2=80=99 {aka
=E2=80=98unsigned int *=E2=80=99} declared as a pointer [-Warray-parameter=
=3D]
   255 | int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
       |                                              ~~~~~^~~~
In file included from ./arch/x86/include/asm/processor.h:22,
                  from ./arch/x86/include/asm/cpufeature.h:5,
                  from ./arch/x86/include/asm/thread_info.h:53,
                  from ./include/linux/thread_info.h:59,
                  from ./arch/x86/include/asm/preempt.h:7,
                  from ./include/linux/preempt.h:78,
                  from arch/x86/lib/msr-smp.c:3:
./arch/x86/include/asm/msr.h:347:50: note: previously declared as an
array =E2=80=98u32[8]=E2=80=99 {aka =E2=80=98unsigned int[8]=E2=80=99}
   347 | int rdmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
       |                                              ~~~~^~~~~~~
arch/x86/lib/msr-smp.c:268:51: warning: argument 2 of type =E2=80=98u32 *=
=E2=80=99 {aka
=E2=80=98unsigned int *=E2=80=99} declared as a pointer [-Warray-parameter=
=3D]
   268 | int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 *regs)
       |                                              ~~~~~^~~~
In file included from ./arch/x86/include/asm/processor.h:22,
                  from ./arch/x86/include/asm/cpufeature.h:5,
                  from ./arch/x86/include/asm/thread_info.h:53,
                  from ./include/linux/thread_info.h:59,
                  from ./arch/x86/include/asm/preempt.h:7,
                  from ./include/linux/preempt.h:78,
                  from arch/x86/lib/msr-smp.c:3:
./arch/x86/include/asm/msr.h:348:50: note: previously declared as an
array =E2=80=98u32[8]=E2=80=99 {aka =E2=80=98unsigned int[8]=E2=80=99}
   348 | int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8]);
       |                                              ~~~~^~~~~~~
   CC      arch/x86/lib/cache-smp.o
...


   CC      drivers/base/core.o
In function =E2=80=98snb_wm_latency_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3108:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3057:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3057 |         intel_print_wm_latency(dev_priv, "Primary",
dev_priv->wm.pri_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3057:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98snb_wm_latency_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3108:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3058:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3058 |         intel_print_wm_latency(dev_priv, "Sprite",
dev_priv->wm.spr_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3058:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98snb_wm_latency_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3108:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3059:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3059 |         intel_print_wm_latency(dev_priv, "Cursor",
dev_priv->wm.cur_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3059:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98snb_wm_lp3_irq_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3109:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3086:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3086 |         intel_print_wm_latency(dev_priv, "Primary",
dev_priv->wm.pri_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3086:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98snb_wm_lp3_irq_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3109:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3087:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3087 |         intel_print_wm_latency(dev_priv, "Sprite",
dev_priv->wm.spr_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3087:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98snb_wm_lp3_irq_quirk=E2=80=99,
     inlined from =E2=80=98ilk_setup_wm_latency=E2=80=99 at
drivers/gpu/drm/i915/intel_pm.c:3109:3,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3088:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3088 |         intel_print_wm_latency(dev_priv, "Cursor",
dev_priv->wm.cur_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3088:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98ilk_setup_wm_latency=E2=80=99,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3103:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3103 |         intel_print_wm_latency(dev_priv, "Primary",
dev_priv->wm.pri_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3103:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98ilk_setup_wm_latency=E2=80=99,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3104:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3104 |         intel_print_wm_latency(dev_priv, "Sprite",
dev_priv->wm.spr_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3104:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
In function =E2=80=98ilk_setup_wm_latency=E2=80=99,
     inlined from =E2=80=98intel_init_pm=E2=80=99 at drivers/gpu/drm/i915/=
intel_pm.c:7628:3:
drivers/gpu/drm/i915/intel_pm.c:3105:9: warning:
=E2=80=98intel_print_wm_latency=E2=80=99 reading 16 bytes from a region of=
 size 10
[-Wstringop-overread]
  3105 |         intel_print_wm_latency(dev_priv, "Cursor",
dev_priv->wm.cur_latency);
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/intel_pm.c: In function =E2=80=98intel_init_pm=E2=80=
=99:
drivers/gpu/drm/i915/intel_pm.c:3105:9: note: referencing argument 3 of
type =E2=80=98const u16 *=E2=80=99 {aka =E2=80=98const short unsigned int =
*=E2=80=99}
drivers/gpu/drm/i915/intel_pm.c:2994:13: note: in a call to function
=E2=80=98intel_print_wm_latency=E2=80=99
  2994 | static void intel_print_wm_latency(struct drm_i915_private
*dev_priv,
       |             ^~~~~~~~~~~~~~~~~~~~~~
   CC [M]  drivers/gpu/drm/i915/intel_runtime_pm.o
..

   CC      net/openvswitch/vport-gre.o
In function =E2=80=98intel_dp_check_mst_status=E2=80=99,
     inlined from =E2=80=98intel_dp_hpd_pulse=E2=80=99 at
drivers/gpu/drm/i915/display/intel_dp.c:5901:8:
drivers/gpu/drm/i915/display/intel_dp.c:4554:22: warning:
=E2=80=98drm_dp_channel_eq_ok=E2=80=99 reading 6 bytes from a region of si=
ze 4
[-Wstringop-overread]
  4554 |                     !drm_dp_channel_eq_ok(&esi[10],
intel_dp->lane_count)) {
       |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_dp.c: In function =E2=80=98intel_dp_hpd=
_pulse=E2=80=99:
drivers/gpu/drm/i915/display/intel_dp.c:4554:22: note: referencing
argument 1 of type =E2=80=98const u8 *=E2=80=99 {aka =E2=80=98const unsign=
ed char *=E2=80=99}
In file included from drivers/gpu/drm/i915/display/intel_dp.c:38:
./include/drm/drm_dp_helper.h:1459:6: note: in a call to function
=E2=80=98drm_dp_channel_eq_ok=E2=80=99
  1459 | bool drm_dp_channel_eq_ok(const u8
link_status[DP_LINK_STATUS_SIZE],
       |      ^~~~~~~~~~~~~~~~~~~~
   AR      net/xdp/built-in.a

...


=2D-
regards

Ronald