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From:   Ronald Warsow <rwarsow@gmx.de>
Subject: Re: Linux 5.12-rc7
To:     linux-kernel@vger.kernel.org
Message-ID: <c8f19524-28a5-5468-93d6-25ee2c9045f6@gmx.de>
Date:   Mon, 12 Apr 2021 04:03:33 +0200
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Hallo

thanks all for the new kernel.

however, I see the following since linux-5.12-rc6 (when I started
testing 5.12)

I'm, as a non-developer, quiet not sure what the warning mean or better
how important they need to be taken, cause the box run's fine, so far.

I'm not sure if the warnings, etc. are only caused by the new compiler,
what is: gcc version 11.0.1 20210405 (Red Hat 11.0.1-0) (GCC) on an
Fedora 34 (beta) box or if it's something else.


during compilation:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

...
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,
       |                 ^~~~~~~~~~~~~~~~~~~~
...

   CC      security/selinux/ss/sidtab.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      net/core/fib_rules.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
...

   AR      drivers/media/platform/built-in.a
   AR      drivers/media/pci/ttpci/built-in.a
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]);
       |                                              ~~~~^~~~~~~
   AR      drivers/media/pci/b2c2/built-in.a
...

   CC [M]  drivers/gpu/drm/i915/i915_scheduler.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);
       |
~~~~~~~~~~^~~~~~~
   AS      arch/x86/lib/iomap_copy_64.o
...

   CC      lib/assoc_array.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],
       |      ^~~~~~~~~~~~~~~~~~~~
   CC [M]  drivers/gpu/drm/i915/display/intel_dp_aux.o
...


in with dmesg
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

I see this ACPI Error's since 5.12-rc6 (a regression compared to 5.11.x)


[    0.960137] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960141] ACPI Error: Aborting method \_PR.CPU1._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960168] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960170] ACPI Error: Aborting method \_PR.CPU2._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960195] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960197] ACPI Error: Aborting method \_PR.CPU3._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960222] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960224] ACPI Error: Aborting method \_PR.CPU4._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960248] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960250] ACPI Error: Aborting method \_PR.CPU5._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960274] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960276] ACPI Error: Aborting method \_PR.CPU6._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
[    0.960300] ACPI BIOS Error (bug): Could not resolve symbol
[\_PR.CPU0._CPC], AE_NOT_FOUND (20210105/psargs-330)
[    0.960302] ACPI Error: Aborting method \_PR.CPU7._CPC due to
previous error (AE_NOT_FOUND) (20210105/psparse-529)
...


and this one since 5.11 or earlier:

[    2.598268] i915 0000:00:02.0: [drm] failed to retrieve link info,
disabling eDP

box is connected via HDMI only.


regards

Ronald