From f78d620dc6266aaf4e4477dcc62ef4a71cb298d7 Mon Sep 17 00:00:00 2001 From: Jens Reidel Date: Thu, 13 Nov 2025 23:37:31 +0100 Subject: [PATCH] linux-samsung-coreprimevelte: Build with LLVM See https://postmarketos.org/edge/2025/11/11/kernels-llvm/ for the background behind this change and how we're handling these MRs. [ci:skip-kconfigcheck]: large change across many packages, we leave kconfig fixes to kernel maintainers Signed-off-by: Jens Reidel Part-of: --- .../linux-samsung-coreprimevelte/APKBUILD | 27 +++++++-- .../clang21.patch | 55 +++++++++++++++++++ .../config-samsung-coreprimevelte.aarch64 | 43 ++++++++------- 3 files changed, 100 insertions(+), 25 deletions(-) create mode 100644 device/community/linux-samsung-coreprimevelte/clang21.patch diff --git a/device/community/linux-samsung-coreprimevelte/APKBUILD b/device/community/linux-samsung-coreprimevelte/APKBUILD index e80e5baf7..5e20e6708 100644 --- a/device/community/linux-samsung-coreprimevelte/APKBUILD +++ b/device/community/linux-samsung-coreprimevelte/APKBUILD @@ -3,15 +3,27 @@ _flavor=samsung-coreprimevelte pkgname=linux-$_flavor pkgver=6.15.8 -pkgrel=0 +pkgrel=1 pkgdesc="Samsung Galaxy Core Prime VE LTE mainline kernel" arch="aarch64" _carch="arm64" url="https://kernel.org" license="GPL-2.0-only" options="!strip !check !tracedeps pmb:cross-native pmb:kconfigcheck-community" -makedepends="bash bc bison devicepkg-dev findutils flex gmp-dev mpc1-dev -mpfr-dev openssl-dev perl postmarketos-installkernel dtc zstd" +makedepends=" + bc + bison + clang + dtc + findutils + flex + lld + llvm + openssl-dev + perl + postmarketos-installkernel + zstd +" # Source _config=config-$_flavor.$arch @@ -39,6 +51,9 @@ source=" 0014-arm64-dts-samsung-coreprimevelte-add-vibrator.patch 0015-DONOTMERGE-mmc-host-Disable-Tuning-failed-message.patch 0016-mmc-sdhci-pxav3-add-pinctrl-setting.patch + + clang21.patch + $_config " builddir="$srcdir"/linux-"$_kernver" @@ -50,13 +65,14 @@ prepare() { build() { unset LDFLAGS - make ARCH="$_carch" \ + make ARCH="$_carch" LLVM=1 \ KBUILD_BUILD_VERSION="$((pkgrel + 1 ))"-$_flavor } package() { make zinstall modules_install dtbs_install \ ARCH=$_carch \ + LLVM=1 \ INSTALL_MOD_STRIP=1 \ INSTALL_PATH="$pkgdir"/boot \ INSTALL_MOD_PATH="$pkgdir" \ @@ -84,5 +100,6 @@ c92dc23c0db6ad1b8bbb02a49467f9a03acf77885374b519842a238b8cefb4156a90cc654fb45dca ae16b59770cd76ab1777ef56a4888a073822a97ab6dbb5f18b3da7e3889c3b982c4b01930652cb68fae2082b566e1b5aacd1b81e536db71d58e7603e9cf04886 0014-arm64-dts-samsung-coreprimevelte-add-vibrator.patch 5b3e3ba9b7ce6501bcd3b94c1e804e05ed5dbaa328c89b40f8cf466002efff704dd7c6d451cc336edf4cdac30489c416d08b13792344c3635c055a6a8b2ddcc6 0015-DONOTMERGE-mmc-host-Disable-Tuning-failed-message.patch 782644892ae1237141431169ad3dcb5c1afad3461f8984909792fc5db9f0059403aba3a77b84867fbbffed541cccea4005169f1fe7cf38a5d81d6dab782f810b 0016-mmc-sdhci-pxav3-add-pinctrl-setting.patch -67a8fe5570cbfee482aa70092e346f642d56ccb75b9064fd78d3efe77b42b62aebe2909c3a24f54f5c0ba2c4c35fd3a09205c6c2b3b04882c57d041dd3ad0c70 config-samsung-coreprimevelte.aarch64 +7db49d195e8034aca257d8d0673cfef2b9c2ce833332c9bae46274ef5d345da5af6fee46a3f3466a75e1771c4815794a87c8190aaccecdcd7c35195362234178 clang21.patch +f3a1645e02edd45cd3465db395c3cd659549fd961317a3e75f46e8c863151a76781ac013bf809e2b8008bb39d27fcbf50e26eb42c27de79a5994e839d1ed95a8 config-samsung-coreprimevelte.aarch64 " diff --git a/device/community/linux-samsung-coreprimevelte/clang21.patch b/device/community/linux-samsung-coreprimevelte/clang21.patch new file mode 100644 index 000000000..e9f7a437a --- /dev/null +++ b/device/community/linux-samsung-coreprimevelte/clang21.patch @@ -0,0 +1,55 @@ +From 153ad566724fe6f57b14f66e9726d295d22e576d Mon Sep 17 00:00:00 2001 +From: Nathan Chancellor +Date: Tue, 15 Jul 2025 12:56:16 -0700 +Subject: [PATCH] mm/ksm: fix -Wsometimes-uninitialized from clang-21 in + advisor_mode_show() + +After a recent change in clang to expose uninitialized warnings from const +variables [1], there is a false positive warning from the if statement in +advisor_mode_show(). + + mm/ksm.c:3687:11: error: variable 'output' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] + 3687 | else if (ksm_advisor == KSM_ADVISOR_SCAN_TIME) + | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + mm/ksm.c:3690:33: note: uninitialized use occurs here + 3690 | return sysfs_emit(buf, "%s\n", output); + | ^~~~~~ + +Rewrite the if statement to implicitly make KSM_ADVISOR_NONE the else +branch so that it is obvious to the compiler that ksm_advisor can only be +KSM_ADVISOR_NONE or KSM_ADVISOR_SCAN_TIME due to the assignments in +advisor_mode_store(). + +Link: https://lkml.kernel.org/r/20250715-ksm-fix-clang-21-uninit-warning-v1-1-f443feb4bfc4@kernel.org +Fixes: 66790e9a735b ("mm/ksm: add sysfs knobs for advisor") +Signed-off-by: Nathan Chancellor +Closes: https://github.com/ClangBuiltLinux/linux/issues/2100 +Link: https://github.com/llvm/llvm-project/commit/2464313eef01c5b1edf0eccf57a32cdee01472c7 [1] +Acked-by: David Hildenbrand +Cc: Chengming Zhou +Cc: Stefan Roesch +Cc: xu xin +Cc: +Signed-off-by: Andrew Morton +--- + mm/ksm.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/mm/ksm.c b/mm/ksm.c +index 8583fb91ef136e..a9d3e719e08993 100644 +--- a/mm/ksm.c ++++ b/mm/ksm.c +@@ -3669,10 +3669,10 @@ static ssize_t advisor_mode_show(struct kobject *kobj, + { + const char *output; + +- if (ksm_advisor == KSM_ADVISOR_NONE) +- output = "[none] scan-time"; +- else if (ksm_advisor == KSM_ADVISOR_SCAN_TIME) ++ if (ksm_advisor == KSM_ADVISOR_SCAN_TIME) + output = "none [scan-time]"; ++ else ++ output = "[none] scan-time"; + + return sysfs_emit(buf, "%s\n", output); + } diff --git a/device/community/linux-samsung-coreprimevelte/config-samsung-coreprimevelte.aarch64 b/device/community/linux-samsung-coreprimevelte/config-samsung-coreprimevelte.aarch64 index dd5012ca5..d2f960f07 100644 --- a/device/community/linux-samsung-coreprimevelte/config-samsung-coreprimevelte.aarch64 +++ b/device/community/linux-samsung-coreprimevelte/config-samsung-coreprimevelte.aarch64 @@ -2,15 +2,15 @@ # Automatically generated file; DO NOT EDIT. # Linux/arm64 6.15.8 Kernel Configuration # -CONFIG_CC_VERSION_TEXT="aarch64-alpine-linux-musl-gcc (Alpine 14.3.0) 14.3.0" -CONFIG_CC_IS_GCC=y -CONFIG_GCC_VERSION=140300 -CONFIG_CLANG_VERSION=0 -CONFIG_AS_IS_GNU=y -CONFIG_AS_VERSION=24400 -CONFIG_LD_IS_BFD=y -CONFIG_LD_VERSION=24400 -CONFIG_LLD_VERSION=0 +CONFIG_CC_VERSION_TEXT="Alpine clang version 21.1.2" +CONFIG_GCC_VERSION=0 +CONFIG_CC_IS_CLANG=y +CONFIG_CLANG_VERSION=210102 +CONFIG_AS_IS_LLVM=y +CONFIG_AS_VERSION=210102 +CONFIG_LD_VERSION=0 +CONFIG_LD_IS_LLD=y +CONFIG_LLD_VERSION=210102 CONFIG_RUSTC_VERSION=0 CONFIG_RUSTC_LLVM_VERSION=0 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y @@ -18,6 +18,8 @@ CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y CONFIG_TOOLS_SUPPORT_RELR=y CONFIG_CC_HAS_ASM_INLINE=y CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y +CONFIG_CC_HAS_COUNTED_BY=y +CONFIG_CC_HAS_MULTIDIMENSIONAL_NONSTRING=y CONFIG_LD_CAN_USE_KEEP_IN_OVERLAY=y CONFIG_PAHOLE_VERSION=0 CONFIG_IRQ_WORK=y @@ -163,11 +165,9 @@ CONFIG_UCLAMP_BUCKETS_COUNT=5 CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y CONFIG_CC_HAS_INT128=y -CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5" +CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough" CONFIG_GCC10_NO_ARRAY_BOUNDS=y -CONFIG_CC_NO_ARRAY_BOUNDS=y CONFIG_GCC_NO_STRINGOP_OVERFLOW=y -CONFIG_CC_NO_STRINGOP_OVERFLOW=y CONFIG_ARCH_SUPPORTS_INT128=y CONFIG_NUMA_BALANCING=y CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y @@ -284,7 +284,7 @@ CONFIG_CRASH_DUMP=y CONFIG_ARM64=y CONFIG_RUSTC_SUPPORTS_ARM64=y -CONFIG_GCC_SUPPORTS_DYNAMIC_FTRACE_WITH_ARGS=y +CONFIG_CLANG_SUPPORTS_DYNAMIC_FTRACE_WITH_ARGS=y CONFIG_64BIT=y CONFIG_MMU=y CONFIG_ARM64_CONT_PTE_SHIFT=4 @@ -466,6 +466,8 @@ CONFIG_RODATA_FULL_DEFAULT_ENABLED=y CONFIG_ARM64_TAGGED_ADDR_ABI=y CONFIG_COMPAT=y CONFIG_KUSER_HELPERS=y +CONFIG_COMPAT_VDSO=y +CONFIG_THUMB2_COMPAT_VDSO=y # CONFIG_COMPAT_ALIGNMENT_FIXUPS is not set # CONFIG_ARMV8_DEPRECATED is not set @@ -514,6 +516,7 @@ CONFIG_ARM64_TLB_RANGE=y # CONFIG_AS_HAS_ARMV8_5=y CONFIG_ARM64_BTI=y +CONFIG_ARM64_BTI_KERNEL=y CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI=y CONFIG_ARM64_E0PD=y CONFIG_ARM64_AS_HAS_MTE=y @@ -710,8 +713,13 @@ CONFIG_ARCH_SUPPORTS_SHADOW_CALL_STACK=y # CONFIG_SHADOW_CALL_STACK is not set CONFIG_ARCH_SUPPORTS_LTO_CLANG=y CONFIG_ARCH_SUPPORTS_LTO_CLANG_THIN=y +CONFIG_HAS_LTO_CLANG=y CONFIG_LTO_NONE=y +# CONFIG_LTO_CLANG_FULL is not set +# CONFIG_LTO_CLANG_THIN is not set CONFIG_ARCH_SUPPORTS_CFI_CLANG=y +# CONFIG_CFI_CLANG is not set +CONFIG_HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG=y CONFIG_HAVE_CONTEXT_TRACKING_USER=y CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y @@ -777,12 +785,9 @@ CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y # end of GCOV-based kernel profiling CONFIG_HAVE_GCC_PLUGINS=y -CONFIG_GCC_PLUGINS=y -CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y CONFIG_FUNCTION_ALIGNMENT_4B=y CONFIG_FUNCTION_ALIGNMENT_8B=y CONFIG_FUNCTION_ALIGNMENT=8 -CONFIG_CC_HAS_MIN_FUNCTION_ALIGNMENT=y CONFIG_CC_HAS_SANE_FUNCTION_ALIGNMENT=y # end of General architecture-dependent options @@ -4975,7 +4980,6 @@ CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y CONFIG_INIT_STACK_NONE=y # CONFIG_INIT_STACK_ALL_PATTERN is not set # CONFIG_INIT_STACK_ALL_ZERO is not set -# CONFIG_GCC_PLUGIN_STACKLEAK is not set # CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set # CONFIG_INIT_ON_FREE_DEFAULT_ON is not set CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y @@ -4996,9 +5000,9 @@ CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y # CONFIG_BUG_ON_DATA_CORRUPTION is not set # end of Hardening of kernel data structures +CONFIG_CC_HAS_RANDSTRUCT=y CONFIG_RANDSTRUCT_NONE=y # CONFIG_RANDSTRUCT_FULL is not set -# CONFIG_RANDSTRUCT_PERFORMANCE is not set # end of Kernel hardening options # end of Security options @@ -5380,6 +5384,7 @@ CONFIG_LIBFDT=y CONFIG_OID_REGISTRY=y CONFIG_HAVE_GENERIC_VDSO=y CONFIG_GENERIC_GETTIMEOFDAY=y +CONFIG_GENERIC_COMPAT_VDSO=y CONFIG_GENERIC_VDSO_TIME_NS=y CONFIG_VDSO_GETRANDOM=y CONFIG_GENERIC_VDSO_DATA_STORE=y @@ -5438,9 +5443,7 @@ CONFIG_DEBUG_INFO_COMPRESSED_ZSTD=y # CONFIG_GDB_SCRIPTS is not set CONFIG_FRAME_WARN=2048 # CONFIG_STRIP_ASM_SYMS is not set -# CONFIG_READABLE_ASM is not set # CONFIG_HEADERS_INSTALL is not set -# CONFIG_DEBUG_SECTION_MISMATCH is not set CONFIG_SECTION_MISMATCH_WARN_ONLY=y CONFIG_ARCH_WANT_FRAME_POINTERS=y CONFIG_FRAME_POINTER=y