The following build warnings / errors noticed with mips defconfig with clang-20 and gcc-12 toolchains.
Regression Analysis: - New regression? yes - Reproducibility? yes
Build regression: next-20250821 cacheflush.h:61:3: error: incompatible pointer types passing 'memdesc_flags_t *' to parameter of type 'volatile unsigned long *' [-Werror,-Wincompatible-pointer-types]
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
* mips, build - clang-nightly-allnoconfig - clang-nightly-defconfig - clang-nightly-lkftconfig-hardening - clang-nightly-lkftconfig-lto-full - clang-nightly-lkftconfig-lto-thing - clang-nightly-tinyconfig - gcc-12-allnoconfig - gcc-12-ath79_defconfig - gcc-12-bcm47xx_defconfig - gcc-12-bcm63xx_defconfig - gcc-12-cavium_octeon_defconfig - gcc-12-defconfig - gcc-12-malta_defconfig - gcc-12-rt305x_defconfig - gcc-12-tinyconfig - gcc-13-lkftconfig-hardening - gcc-8-allnoconfig - gcc-8-ath79_defconfig - gcc-8-bcm47xx_defconfig - gcc-8-bcm63xx_defconfig - gcc-8-cavium_octeon_defconfig - gcc-8-defconfig - gcc-8-lkftconfig-hardening - gcc-8-malta_defconfig - gcc-8-rt305x_defconfig - gcc-8-tinyconfig
## Build error mips In file included from include/linux/cacheflush.h:5: arch/mips/include/asm/cacheflush.h:61:3: error: incompatible pointer types passing 'memdesc_flags_t *' to parameter of type 'volatile unsigned long *' [-Werror,-Wincompatible-pointer-types] 61 | folio_set_dcache_dirty(folio); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/include/asm/cacheflush.h:42:27: note: expanded from macro 'folio_set_dcache_dirty' 42 | set_bit(PG_dcache_dirty, &(folio)->flags) | ^~~~~~~~~~~~~~~ arch/mips/include/asm/bitops.h:89:70: note: passing argument to parameter 'addr' here 89 | static inline void set_bit(unsigned long nr, volatile unsigned long *addr) | ^
In file included from include/linux/cacheflush.h:5: arch/mips/include/asm/cacheflush.h:70:3: error: incompatible pointer types passing 'memdesc_flags_t *' to parameter of type 'volatile unsigned long *' [-Werror,-Wincompatible-pointer-types] 70 | folio_set_dcache_dirty(page_folio(page)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/include/asm/cacheflush.h:42:27: note: expanded from macro 'folio_set_dcache_dirty' 42 | set_bit(PG_dcache_dirty, &(folio)->flags) | ^~~~~~~~~~~~~~~ arch/mips/include/asm/bitops.h:89:70: note: passing argument to parameter 'addr' here 89 | static inline void set_bit(unsigned long nr, volatile unsigned long *addr) | ^ 2 errors generated.
## Source * Kernel version: 6.17.0-rc2 * Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git * Git describe: next-20250821 * Git commit: 7fa4d8dc380fbd81a9d702a855c50690c9c6442c * Architectures: mips * Toolchains: clang-20 gcc-12 * Kconfigs: defconfig
## Build * Build log: https://qa-reports.linaro.org/api/testruns/29616797/log_file/ * Build details mips: https://regressions.linaro.org/lkft/linux-next-master/next-20250821/build/cl... * Build plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/builds/31aRYnoYJb... * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/31aRYnoYJbpEW0zZyTGvO... * Kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/31aRYnoYJbpEW0zZyTGvO...
-- Linaro LKFT https://lkft.linaro.org