Re: Build regressions/improvements in v5.16-rc1

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On 11/16/21 5:59 PM, Nick Terrell wrote:


On Nov 15, 2021, at 8:44 AM, Helge Deller <deller@xxxxxx> wrote:

On 11/15/21 17:12, Geert Uytterhoeven wrote:
On Mon, Nov 15, 2021 at 4:54 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
Below is the list of build error/warning regressions/improvements in
v5.16-rc1[1] compared to v5.15[2].

Summarized:
  - build errors: +20/-13
  - build warnings: +3/-28

Happy fixing! ;-)

Thanks to the linux-next team for providing the build service.

[1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf/  (all 90 configs)
[2] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/8bb7eca972ad531c9b149c0a51ab43a417385813/  (all 90 configs)


*** ERRORS ***

20 error regressions:
  + /kisskb/src/arch/parisc/include/asm/jump_label.h: error: expected ':' before '__stringify':  => 33:4, 18:4
  + /kisskb/src/arch/parisc/include/asm/jump_label.h: error: label 'l_yes' defined but not used [-Werror=unused-label]:  => 38:1, 23:1

    due to static_branch_likely() in crypto/api.c

parisc-allmodconfig

fixed now in the parisc for-next git tree.


  + /kisskb/src/drivers/gpu/drm/msm/msm_drv.h: error: "COND" redefined [-Werror]:  => 531
  + /kisskb/src/lib/zstd/compress/zstd_double_fast.c: error: the frame size of 3252 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 47:1
  + /kisskb/src/lib/zstd/compress/zstd_double_fast.c: error: the frame size of 3360 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 499:1
  + /kisskb/src/lib/zstd/compress/zstd_double_fast.c: error: the frame size of 5344 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 334:1
  + /kisskb/src/lib/zstd/compress/zstd_double_fast.c: error: the frame size of 5380 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 354:1
  + /kisskb/src/lib/zstd/compress/zstd_fast.c: error: the frame size of 1824 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 372:1
  + /kisskb/src/lib/zstd/compress/zstd_fast.c: error: the frame size of 2224 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 204:1
  + /kisskb/src/lib/zstd/compress/zstd_fast.c: error: the frame size of 3800 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 476:1

parisc-allmodconfig

parisc needs much bigger frame sizes, so I'm not astonished here.
During the v5.15 cycl I increased it to 1536 (from 1280), so I'm simply tempted to
increase it this time to 4096, unless someone has a better idea....

This patch set should fix the zstd stack size warnings [0]. I’ve
verified the fix using the same tooling: gcc-8-hppa-linux-gnu.

I’ll send the PR to Linus tomorrow. I’ve been informed that it
isn't strictly necessary to send the patches to the mailing list
for bug fixes, but its already done, so I’ll wait and see if there
is any feedback.

IMO several (or many more) people would disagree with that.

"strictly?"  OK, it's probably possible that almost any patch
could be merged without being on a mailing list, but it's not
desirable (except in the case of "security" patches).

--
~Randy



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