On Tuesday 09/02 at 15:00 +0530, Naresh Kamboju wrote:

The following build warnings / errors are noticed on powerpc ppc6xx_defconfig with gcc-13 toolchain running on Linux next-20250901 and next-20250902.

Regression Analysis:

• New regression? yes
• Reproducibility? yes

First seen on next-20250901 Bad: next-20250901 and next-20250902 Good: next-20250829

Build regression: next-20250901 drivers bluetooth bpa10x.c:77:33: error: array type has incomplete element type 'struct h4_recv_pkt'

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

Powerpc: build: * gcc-13-ppc6xx_defconfig * gcc-8-ppc6xx_defconfig

Hi Naresh,

This should fix it: https://lore.kernel.org/all/aLNRvzXE4O9dKZoN@mozart.vkv.me/

Thanks, Calvin

Build error: drivers/bluetooth/bpa10x.c:77:33: error: array type has incomplete element type 'struct h4_recv_pkt' 77 | static const struct h4_recv_pkt bpa10x_recv_pkts[] = { | ^~~~~~~~~~~~~~~~ drivers/bluetooth/bpa10x.c:78:11: error: 'H4_RECV_ACL' undeclared here (not in a function) 78 | { H4_RECV_ACL, .recv = hci_recv_frame }, | ^~~~~~~~~~~ drivers/bluetooth/bpa10x.c:79:11: error: 'H4_RECV_SCO' undeclared here (not in a function) 79 | { H4_RECV_SCO, .recv = hci_recv_frame }, | ^~~~~~~~~~~ drivers/bluetooth/bpa10x.c:80:11: error: 'H4_RECV_EVENT' undeclared here (not in a function) 80 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | ^~~~~~~~~~~~~ drivers/bluetooth/bpa10x.c: In function 'bpa10x_rx_complete': drivers/bluetooth/bpa10x.c:99:37: error: implicit declaration of function 'h4_recv_buf' [-Werror=implicit-function-declaration] 99 | data->rx_skb[idx] = h4_recv_buf(hdev, data->rx_skb[idx], | ^~~~~~~~~~~ In file included from include/linux/array_size.h:5, from include/linux/kernel.h:16, from drivers/bluetooth/bpa10x.c:9: include/linux/compiler.h:197:82: error: expression in static assertion is not an integer 197 | #define __BUILD_BUG_ON_ZERO_MSG(e, msg, ...) ((int)sizeof(struct {_Static_assert(!(e), msg);})) | ^ include/linux/compiler.h:202:33: note: in expansion of macro '__BUILD_BUG_ON_ZERO_MSG' 202 | #define __must_be_array(a) __BUILD_BUG_ON_ZERO_MSG(!__is_array(a), \ | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/array_size.h:11:59: note: in expansion of macro '__must_be_array' 11 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) | ^~~~~~~~~~~~~~~ drivers/bluetooth/bpa10x.c:103:49: note: in expansion of macro 'ARRAY_SIZE' 103 | ARRAY_SIZE(bpa10x_recv_pkts)); | ^~~~~~~~~~ drivers/bluetooth/bpa10x.c: At top level: drivers/bluetooth/bpa10x.c:77:33: warning: 'bpa10x_recv_pkts' defined but not used [-Wunused-variable] 77 | static const struct h4_recv_pkt bpa10x_recv_pkts[] = { | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors

## Source

• Kernel version: 6.17.0-rc4
• Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
• Git describe: next-20250902
• Git commit: 3db46a82d467bd23d9ebc473d872a865785299d8
• Architectures: powerpc
• Toolchains: gcc-13
• Kconfigs: ppc6xx_defconfig

## Build

• Build log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250902/tes...
• Build details:

https://regressions.linaro.org/lkft/linux-next-master/next-20250901/log-pars...

• Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/328DwMMwNO...
• Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/328DwMMwNOpSAj0qnRpJa...
• Kernel config:

https://storage.tuxsuite.com/public/linaro/lkft/builds/328DwMMwNOpSAj0qnRpJa...

-- Linaro LKFT https://lkft.linaro.org