Re: Build regressions/improvements in v6.2-rc1

[Geert Uytterhoeven]

On Tue, 27 Dec 2022, Geert Uytterhoeven wrote:
> Below is the list of build error/warning regressions/improvements in
> v6.2-rc1[1] compared to v6.1[2].
>
> Summarized:
>  - build errors: +11/-13

amd-gfx@xxxxxxxxxxxxxxxxxxxxx
linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
linux-media@xxxxxxxxxxxxxxx
linux-wireless@xxxxxxxxxxxxxxx
linux-mips@xxxxxxxxxxxxxxx
linux-sh@xxxxxxxxxxxxxxx
linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx
linuxppc-dev@xxxxxxxxxxxxxxxx
kasan-dev@xxxxxxxxxxxxxxxx
linux-xtensa@xxxxxxxxxxxxxxxx

  + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn31/display_mode_vba_31.c: error: the frame size of 2224 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]:  => 7082:1
  + /kisskb/src/drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn314/display_mode_vba_314.c: error: the frame size of 2208 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]:  => 7127:1

arm64-gcc5/arm64-allmodconfig

  + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 2 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28
  + /kisskb/src/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c: error: array subscript 3 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Werror=array-bounds]:  => 641:28

m68k-gcc8/m68k-allmodconfig
See also https://lore.kernel.org/all/CAMuHMdWpPX2mpqFEWjjbjsQvDBQOXyjjdpKnQu9qURAuVZXmMw@xxxxxxxxxxxxxx

  + /kisskb/src/include/linux/bitfield.h: error: call to '__field_overflow' declared with attribute error: value doesn't fit into mask:  => 151:3

In function 'u32_encode_bits',
    inlined from 'ieee80211_mlo_multicast_tx' at /kisskb/src/net/mac80211/tx.c:4435:17,
    inlined from 'ieee80211_subif_start_xmit' at /kisskb/src/net/mac80211/tx.c:4483:3:

mipsel-gcc5/mips-allmodconfig

  + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_262' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45
  + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_263' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45

In function 'follow_pmd_mask',
    inlined from 'follow_pud_mask' at /kisskb/src/mm/gup.c:735:9,
    inlined from 'follow_p4d_mask' at /kisskb/src/mm/gup.c:752:9,
    inlined from 'follow_page_mask' at /kisskb/src/mm/gup.c:809:9:

sh4-gcc11/sh-defconfig (Günter wondered if pmd_t should use union)

  + /kisskb/src/include/linux/fortify-string.h: error: '__builtin_memcpy' offset [0, 127] is out of the bounds [0, 0] [-Werror=array-bounds]:  => 57:33

/kisskb/src/arch/s390/kernel/setup.c: In function 'setup_lowcore_dat_on':
s390x-gcc11/s390-all{mod,yes}config

  + /kisskb/src/include/linux/fortify-string.h: error: '__builtin_memset' pointer overflow between offset [28, 898293814] and size [-898293787, -1] [-Werror=array-bounds]:  => 59:33

/kisskb/src/fs/f2fs/inline.c: In function 'f2fs_move_inline_dirents':

powerpc-gcc11/ppc64_book3e_allmodconfig
powerpc-gcc11/powerpc-all{mod,yes}config

  + /kisskb/src/kernel/kcsan/kcsan_test.c: error: the frame size of 1680 bytes is larger than 1536 bytes [-Werror=frame-larger-than=]:  => 257:1

xtensa-gcc11/xtensa-allmodconfig (patch available)

  + {standard input}: Error: unknown pseudo-op: `.cfi_def_c':  => 1718

sh4-gcc11/sh-allmodconfig (ICE = internal compiler error)

> [1] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/1b929c02afd37871d5afb9d498426f83432e71c2/ (all 152 configs)
> [2] http://kisskb.ellerman.id.au/kisskb/branch/linus/head/830b3c68c1fb1e9176028d02ef86f3cf76aa2476/ (all 152 configs)

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds