July 2025 - Linux-stable-mirror

[PATCH v3 4/5] drm/xe: use 4KiB alignment for cursor jumps

by Simon Richter

From: Mingcong Bai <jeffbai(a)aosc.io> It appears that the xe_res_cursor also assumes 4KiB alignment. Current implementation uses `PAGE_SIZE' as an assumed alignment reference, but 4KiB kernel page sizes is by no means a guarantee. On 16KiB-paged kernels, this causes driver failures during boot up: [ 23.242757] ------------[ cut here ]------------ [ 23.247363] WARNING: CPU: 0 PID: 2036 at drivers/gpu/drm/xe/xe_res_cursor.h:182 emit_pte+0x394/0x3b0 [xe] [ 23.256962] Modules linked in: nf_conntrack_netbios_ns(E) nf_conntrack_broadcast(E) nft_fib_inet(E) nft_fib_ipv4(E) nft_fib_ipv6(E) nft_fib(E) nft_reject_inet(E) nf_reject_ipv4(E) nf_reject_ipv6(E) nft_reject(E) nft_ct(E) rfkill(E) nft_chain_nat(E) ip6table_nat(E) ip6table_mangle(E) ip6table_raw(E) ip6table_security(E) iptable_nat(E) nf_nat(E) nf_conntrack(E) nf_defrag_ipv6(E) nf_defrag_ipv4(E) iptable_mangle(E) iptable_raw(E) iptable_security(E) ip_set(E) nf_tables(E) ip6table_filter(E) ip6_tables(E) iptable_filter(E) snd_hda_codec_conexant(E) snd_hda_codec_generic(E) snd_hda_codec_hdmi(E) snd_hda_intel(E) snd_intel_dspcfg(E) snd_hda_codec(E) nls_iso8859_1(E) qrtr(E) nls_cp437(E) snd_hda_core(E) loongson3_cpufreq(E) rtc_efi(E) snd_hwdep(E) snd_pcm(E) spi_loongson_pci(E) snd_timer(E) snd(E) spi_loongson_core(E) soundcore(E) gpio_loongson_64bit(E) rtc_loongson(E) i2c_ls2x(E) mousedev(E) input_leds(E) sch_fq_codel(E) fuse(E) nfnetlink(E) dmi_sysfs(E) ip_tables(E) x_tables(E) xe(E) d rm_gpuvm(E) drm_buddy(E) gpu_sched(E) [ 23.257034] drm_exec(E) drm_suballoc_helper(E) drm_display_helper(E) cec(E) rc_core(E) hid_generic(E) tpm_tis_spi(E) r8169(E) loongson(E) i2c_algo_bit(E) realtek(E) drm_ttm_helper(E) led_class(E) ttm(E) drm_client_lib(E) drm_kms_helper(E) sunrpc(E) i2c_dev(E) [ 23.369697] CPU: 0 UID: 1000 PID: 2036 Comm: QSGRenderThread Tainted: G E 6.14.0-rc4-aosc-main-g7cc07e6e50b0-dirty #8 [ 23.381640] Tainted: [E]=UNSIGNED_MODULE [ 23.385534] Hardware name: Loongson Loongson-3A6000-HV-7A2000-1w-V0.1-EVB/Loongson-3A6000-HV-7A2000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V4.0.05756-prestab [ 23.399319] pc ffff80000251efc0 ra ffff80000251eddc tp 900000011fe3c000 sp 900000011fe3f7e0 [ 23.407632] a0 0000000000000001 a1 0000000000000000 a2 0000000000000000 a3 0000000000000000 [ 23.415938] a4 0000000000000000 a5 0000000000000000 a6 0000000000060000 a7 900000010c947b00 [ 23.424240] t0 0000000000000000 t1 0000000000000000 t2 0000000000000000 t3 900000012e456230 [ 23.432543] t4 0000000000000035 t5 0000000000004000 t6 00000001fbc40403 t7 0000000000004000 [ 23.440845] t8 9000000100e688a8 u0 5cc06cee8ef0edee s9 9000000100024420 s0 0000000000000047 [ 23.449147] s1 0000000000004000 s2 0000000000000001 s3 900000012adba000 s4 ffffffffffffc000 [ 23.457450] s5 9000000108939428 s6 0000000000000000 s7 0000000000000000 s8 900000011fe3f8e0 [ 23.465851] ra: ffff80000251eddc emit_pte+0x1b0/0x3b0 [xe] [ 23.471761] ERA: ffff80000251efc0 emit_pte+0x394/0x3b0 [xe] [ 23.477557] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 23.483732] PRMD: 00000004 (PPLV0 +PIE -PWE) [ 23.488068] EUEN: 00000003 (+FPE +SXE -ASXE -BTE) [ 23.492832] ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) [ 23.497594] ESTAT: 000c0000 [BRK] (IS= ECode=12 EsubCode=0) [ 23.503133] PRID: 0014d000 (Loongson-64bit, Loongson-3A6000-HV) [ 23.509164] CPU: 0 UID: 1000 PID: 2036 Comm: QSGRenderThread Tainted: G E 6.14.0-rc4-aosc-main-g7cc07e6e50b0-dirty #8 [ 23.509168] Tainted: [E]=UNSIGNED_MODULE [ 23.509168] Hardware name: Loongson Loongson-3A6000-HV-7A2000-1w-V0.1-EVB/Loongson-3A6000-HV-7A2000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V4.0.05756-prestab [ 23.509170] Stack : ffffffffffffffff ffffffffffffffff 900000000023eb34 900000011fe3c000 [ 23.509176] 900000011fe3f440 0000000000000000 900000011fe3f448 9000000001c31c70 [ 23.509181] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 23.509185] 0000000000000000 5cc06cee8ef0edee 0000000000000000 0000000000000000 [ 23.509190] 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 23.509193] 0000000000000000 0000000000000000 00000000066b4000 9000000100024420 [ 23.509197] 9000000001eb8000 0000000000000000 9000000001c31c70 0000000000000004 [ 23.509202] 0000000000000004 0000000000000000 0000000000000000 0000000000000000 [ 23.509206] 900000011fe3f8e0 9000000001c31c70 9000000000244174 00007fffac097534 [ 23.509211] 00000000000000b0 0000000000000004 0000000000000003 0000000000071c1d [ 23.509216] ... [ 23.509218] Call Trace: [ 23.509220] [<9000000000244174>] show_stack+0x3c/0x16c [ 23.509226] [<900000000023eb30>] dump_stack_lvl+0x84/0xe0 [ 23.509230] [<9000000000288208>] __warn+0x8c/0x174 [ 23.509234] [<90000000017c1918>] report_bug+0x1c0/0x22c [ 23.509238] [<90000000017f66e8>] do_bp+0x280/0x344 [ 23.509243] [<90000000002428a0>] handle_bp+0x120/0x1c0 [ 23.509247] [<ffff80000251efc0>] emit_pte+0x394/0x3b0 [xe] [ 23.509295] [<ffff800002520d38>] xe_migrate_clear+0x2d8/0xa54 [xe] [ 23.509341] [<ffff8000024e6c38>] xe_bo_move+0x324/0x930 [xe] [ 23.509387] [<ffff800002209468>] ttm_bo_handle_move_mem+0xd0/0x194 [ttm] [ 23.509392] [<ffff800002209ebc>] ttm_bo_validate+0xd4/0x1cc [ttm] [ 23.509396] [<ffff80000220a138>] ttm_bo_init_reserved+0x184/0x1dc [ttm] [ 23.509399] [<ffff8000024e7840>] ___xe_bo_create_locked+0x1e8/0x3d4 [xe] [ 23.509445] [<ffff8000024e7cf8>] __xe_bo_create_locked+0x2cc/0x390 [xe] [ 23.509489] [<ffff8000024e7e98>] xe_bo_create_user+0x34/0xe4 [xe] [ 23.509533] [<ffff8000024e875c>] xe_gem_create_ioctl+0x154/0x4d8 [xe] [ 23.509578] [<9000000001062784>] drm_ioctl_kernel+0xe0/0x14c [ 23.509582] [<9000000001062c10>] drm_ioctl+0x420/0x5f4 [ 23.509585] [<ffff8000024ea778>] xe_drm_ioctl+0x64/0xac [xe] [ 23.509630] [<9000000000653504>] sys_ioctl+0x2b8/0xf98 [ 23.509634] [<90000000017f684c>] do_syscall+0xa0/0x140 [ 23.509637] [<9000000000241e38>] handle_syscall+0xb8/0x158 [ 23.509640] [ 23.509644] ---[ end trace 0000000000000000 ]--- Revise calls to `xe_res_dma()' and `xe_res_cursor()' to use `XE_PTE_MASK' (12) and `SZ_4K' to fix this potentially confused use of `PAGE_SIZE' in relevant code. Cc: stable(a)vger.kernel.org Fixes: e89b384cde62 ("drm/xe/migrate: Update emit_pte to cope with a size level than 4k") Tested-by: Mingcong Bai <jeffbai(a)aosc.io> Tested-by: Wenbin Fang <fangwenbin(a)vip.qq.com> Tested-by: Haien Liang <27873200(a)qq.com> Tested-by: Jianfeng Liu <liujianfeng1994(a)gmail.com> Tested-by: Shirong Liu <lsr1024(a)qq.com> Tested-by: Haofeng Wu <s2600cw2(a)126.com> Link: https://github.com/FanFansfan/loongson-linux/commit/22c55ab3931c32410a077b3… Link: https://t.me/c/1109254909/768552 Co-developed-by: Shang Yatsen <429839446(a)qq.com> Signed-off-by: Shang Yatsen <429839446(a)qq.com> Signed-off-by: Mingcong Bai <jeffbai(a)aosc.io> --- drivers/gpu/drm/xe/xe_migrate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c index 6a80ae6104dd..89bd78c542b9 100644 --- a/drivers/gpu/drm/xe/xe_migrate.c +++ b/drivers/gpu/drm/xe/xe_migrate.c @@ -606,7 +606,7 @@ static void emit_pte(struct xe_migrate *m, u64 addr, flags = 0; bool devmem = false; - addr = xe_res_dma(cur) & PAGE_MASK; + addr = xe_res_dma(cur) & ~XE_PTE_MASK; if (is_vram) { if (vm->flags & XE_VM_FLAG_64K) { u64 va = cur_ofs * XE_PAGE_SIZE / 8; @@ -627,7 +627,7 @@ static void emit_pte(struct xe_migrate *m, bb->cs[bb->len++] = lower_32_bits(addr); bb->cs[bb->len++] = upper_32_bits(addr); - xe_res_next(cur, min_t(u32, size, PAGE_SIZE)); + xe_res_next(cur, min_t(u32, size, XE_PAGE_SIZE)); cur_ofs += 8; } } -- 2.47.2

2 months, 3 weeks

1
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[PATCH 6.1.y 0/5] erofs: backport for `erofs: address D-cache aliasing`

by Gao Xiang

6.6.y fix: https://lore.kernel.org/r/20250722094449.2950654-1-hsiangkao@linux.alibaba.… Hi Jan & Stefan, Please help confirm this 6.1 fix backport if possible too. Thanks, Gao Xiang Gao Xiang (5): erofs: get rid of debug_one_dentry() erofs: sunset erofs_dbg() erofs: drop z_erofs_page_mark_eio() erofs: simplify z_erofs_transform_plain() erofs: address D-cache aliasing fs/erofs/decompressor.c | 23 +++++++---------- fs/erofs/dir.c | 17 ------------- fs/erofs/inode.c | 3 --- fs/erofs/internal.h | 2 -- fs/erofs/namei.c | 9 +++---- fs/erofs/zdata.c | 56 +++++++++++++++++------------------------ fs/erofs/zmap.c | 3 --- 7 files changed, 35 insertions(+), 78 deletions(-) -- 2.43.5

2 months, 3 weeks

2
10
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FAILED: patch "[PATCH] rust: use `#[used(compiler)]` to fix build and `modpost` with" failed to apply to 6.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.15.y git checkout FETCH_HEAD git cherry-pick -x 7498159226772d66f150dd406be462d75964a366 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025072101-perfume-vitalize-a08b@gregkh' --subject-prefix 'PATCH 6.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7498159226772d66f150dd406be462d75964a366 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda <ojeda(a)kernel.org> Date: Sat, 12 Jul 2025 18:01:03 +0200 Subject: [PATCH] rust: use `#[used(compiler)]` to fix build and `modpost` with Rust >= 1.89.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Starting with Rust 1.89.0 (expected 2025-08-07), the Rust compiler fails to build the `rusttest` target due to undefined references such as: kernel...-cgu.0:(.text....+0x116): undefined reference to `rust_helper_kunit_get_current_test' Moreover, tooling like `modpost` gets confused: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/nova/nova.o ERROR: modpost: missing MODULE_LICENSE() in drivers/gpu/nova-core/nova_core.o The reason behind both issues is that the Rust compiler will now [1] treat `#[used]` as `#[used(linker)]` instead of `#[used(compiler)]` for our targets. This means that the retain section flag (`R`, `SHF_GNU_RETAIN`) will be used and that they will be marked as `unique` too, with different IDs. In turn, that means we end up with undefined references that did not get discarded in `rusttest` and that multiple `.modinfo` sections are generated, which confuse tooling like `modpost` because they only expect one. Thus start using `#[used(compiler)]` to keep the previous behavior and to be explicit about what we want. Sadly, it is an unstable feature (`used_with_arg`) [2] -- we will talk to upstream Rust about it. The good news is that it has been available for a long time (Rust >= 1.60) [3]. The changes should also be fine for previous Rust versions, since they behave the same way as before [4]. Alternatively, we could use `#[no_mangle]` or `#[export_name = ...]` since those still behave like `#[used(compiler)]`, but of course it is not really what we want to express, and it requires other changes to avoid symbol conflicts. Cc: David Wood <david(a)davidtw.co> Cc: Wesley Wiser <wwiser(a)gmail.com> Cc: stable(a)vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs). Link: https://github.com/rust-lang/rust/pull/140872 [1] Link: https://github.com/rust-lang/rust/issues/93798 [2] Link: https://github.com/rust-lang/rust/pull/91504 [3] Link: https://godbolt.org/z/sxzWTMfzW [4] Reviewed-by: Alice Ryhl <aliceryhl(a)google.com> Acked-by: Björn Roy Baron <bjorn3_gh(a)protonmail.com> Link: https://lore.kernel.org/r/20250712160103.1244945-3-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda(a)kernel.org> diff --git a/rust/Makefile b/rust/Makefile index 27dec7904c3a..115b63b7d1e3 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -194,6 +194,7 @@ quiet_cmd_rustdoc_test = RUSTDOC T $< RUST_MODFILE=test.rs \ OBJTREE=$(abspath $(objtree)) \ $(RUSTDOC) --test $(rust_common_flags) \ + -Zcrate-attr='feature(used_with_arg)' \ @$(objtree)/include/generated/rustc_cfg \ $(rustc_target_flags) $(rustdoc_test_target_flags) \ $(rustdoc_test_quiet) \ diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index 2494c96e105f..4fe621f35716 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -202,7 +202,7 @@ macro_rules! module_firmware { }; #[link_section = ".modinfo"] - #[used] + #[used(compiler)] static __MODULE_FIRMWARE: [u8; $($builder)*::create(__MODULE_FIRMWARE_PREFIX) .build_length()] = $($builder)*::create(__MODULE_FIRMWARE_PREFIX).build(); }; diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 4b8cdcb21e77..b9e65905e121 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -302,7 +302,7 @@ macro_rules! kunit_unsafe_test_suite { is_init: false, }; - #[used] + #[used(compiler)] #[allow(unused_unsafe)] #[cfg_attr(not(target_os = "macos"), link_section = ".kunit_test_suites")] static mut KUNIT_TEST_SUITE_ENTRY: *const ::kernel::bindings::kunit_suite = diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 6b4774b2b1c3..e13d6ed88fa6 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -34,6 +34,9 @@ // Expected to become stable. #![feature(arbitrary_self_types)] // +// To be determined. +#![feature(used_with_arg)] +// // `feature(derive_coerce_pointee)` is expected to become stable. Before Rust // 1.84.0, it did not exist, so enable the predecessor features. #![cfg_attr(CONFIG_RUSTC_HAS_COERCE_POINTEE, feature(derive_coerce_pointee))] diff --git a/rust/macros/module.rs b/rust/macros/module.rs index 2ddd2eeb2852..75efc6eeeafc 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -57,7 +57,7 @@ fn emit_base(&mut self, field: &str, content: &str, builtin: bool) { {cfg} #[doc(hidden)] #[cfg_attr(not(target_os = \"macos\"), link_section = \".modinfo\")] - #[used] + #[used(compiler)] pub static __{module}_{counter}: [u8; {length}] = *{string}; ", cfg = if builtin { @@ -249,7 +249,7 @@ mod __module_init {{ // key or a new section. For the moment, keep it simple. #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] static __IS_RUST_MODULE: () = (); static mut __MOD: ::core::mem::MaybeUninit<{type_}> = @@ -273,7 +273,7 @@ mod __module_init {{ #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] #[link_section = \".init.data\"] static __UNIQUE_ID___addressable_init_module: unsafe extern \"C\" fn() -> i32 = init_module; @@ -293,7 +293,7 @@ mod __module_init {{ #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] #[link_section = \".exit.data\"] static __UNIQUE_ID___addressable_cleanup_module: extern \"C\" fn() = cleanup_module; @@ -303,7 +303,7 @@ mod __module_init {{ #[cfg(not(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS))] #[doc(hidden)] #[link_section = \"{initcall_section}\"] - #[used] + #[used(compiler)] pub static __{ident}_initcall: extern \"C\" fn() -> ::kernel::ffi::c_int = __{ident}_init; diff --git a/scripts/Makefile.build b/scripts/Makefile.build index a6461ea411f7..ba71b27aa363 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -312,10 +312,11 @@ $(obj)/%.lst: $(obj)/%.c FORCE # - Stable since Rust 1.82.0: `feature(asm_const)`, `feature(raw_ref_op)`. # - Stable since Rust 1.87.0: `feature(asm_goto)`. # - Expected to become stable: `feature(arbitrary_self_types)`. +# - To be determined: `feature(used_with_arg)`. # # Please see https://github.com/Rust-for-Linux/linux/issues/2 for details on # the unstable features in use. -rust_allowed_features := asm_const,asm_goto,arbitrary_self_types,lint_reasons,raw_ref_op +rust_allowed_features := asm_const,asm_goto,arbitrary_self_types,lint_reasons,raw_ref_op,used_with_arg # `--out-dir` is required to avoid temporaries being created by `rustc` in the # current working directory, which may be not accessible in the out-of-tree

2 months, 3 weeks

3
2
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[PATCH 5.15.y 0/4] Fix blank WHCAN value in 'ps' output

by Siddhi Katage

The 'ps' output prints blank(hyphen) WHCAN value for all the tasks. This patchset will help print the correct WCHAN value. Kees Cook (1): sched: Add wrapper for get_wchan() to keep task blocked Peter Zijlstra (2): x86: Fix __get_wchan() for !STACKTRACE x86: Pin task-stack in __get_wchan() Qi Zheng (1): x86: Fix get_wchan() to support the ORC unwinder arch/alpha/include/asm/processor.h | 2 +- arch/alpha/kernel/process.c | 5 +- arch/arc/include/asm/processor.h | 2 +- arch/arc/kernel/stacktrace.c | 4 +- arch/arm/include/asm/processor.h | 2 +- arch/arm/kernel/process.c | 4 +- arch/arm64/include/asm/processor.h | 2 +- arch/arm64/kernel/process.c | 4 +- arch/csky/include/asm/processor.h | 2 +- arch/csky/kernel/stacktrace.c | 5 +- arch/h8300/include/asm/processor.h | 2 +- arch/h8300/kernel/process.c | 5 +- arch/hexagon/include/asm/processor.h | 2 +- arch/hexagon/kernel/process.c | 4 +- arch/ia64/include/asm/processor.h | 2 +- arch/ia64/kernel/process.c | 5 +- arch/m68k/include/asm/processor.h | 2 +- arch/m68k/kernel/process.c | 4 +- arch/microblaze/include/asm/processor.h | 2 +- arch/microblaze/kernel/process.c | 2 +- arch/mips/include/asm/processor.h | 2 +- arch/mips/kernel/process.c | 8 ++-- arch/nds32/include/asm/processor.h | 2 +- arch/nds32/kernel/process.c | 7 +-- arch/nios2/include/asm/processor.h | 2 +- arch/nios2/kernel/process.c | 5 +- arch/openrisc/include/asm/processor.h | 2 +- arch/openrisc/kernel/process.c | 2 +- arch/parisc/include/asm/processor.h | 2 +- arch/parisc/kernel/process.c | 5 +- arch/powerpc/include/asm/processor.h | 2 +- arch/powerpc/kernel/process.c | 9 ++-- arch/riscv/include/asm/processor.h | 2 +- arch/riscv/kernel/stacktrace.c | 12 ++--- arch/s390/include/asm/processor.h | 2 +- arch/s390/kernel/process.c | 4 +- arch/sh/include/asm/processor_32.h | 2 +- arch/sh/kernel/process_32.c | 5 +- arch/sparc/include/asm/processor_32.h | 2 +- arch/sparc/include/asm/processor_64.h | 2 +- arch/sparc/kernel/process_32.c | 5 +- arch/sparc/kernel/process_64.c | 5 +- arch/um/include/asm/processor-generic.h | 2 +- arch/um/kernel/process.c | 5 +- arch/x86/include/asm/processor.h | 2 +- arch/x86/kernel/process.c | 62 ++++++------------------- arch/xtensa/include/asm/processor.h | 2 +- arch/xtensa/kernel/process.c | 5 +- include/linux/sched.h | 1 + kernel/sched/core.c | 19 ++++++++ 50 files changed, 94 insertions(+), 155 deletions(-) -- 2.47.1

2 months, 3 weeks

3
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FAILED: patch "[PATCH] net: libwx: fix multicast packets received count" failed to apply to 6.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.15.y git checkout FETCH_HEAD git cherry-pick -x 2b30a3d1ec2538a1fd363fde746b9fe1d38abc77 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025072136-steersman-voicing-574e@gregkh' --subject-prefix 'PATCH 6.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 2b30a3d1ec2538a1fd363fde746b9fe1d38abc77 Mon Sep 17 00:00:00 2001 From: Jiawen Wu <jiawenwu(a)trustnetic.com> Date: Mon, 14 Jul 2025 09:56:56 +0800 Subject: [PATCH] net: libwx: fix multicast packets received count Multicast good packets received by PF rings that pass ethternet MAC address filtering are counted for rtnl_link_stats64.multicast. The counter is not cleared on read. Fix the duplicate counting on updating statistics. Fixes: 46b92e10d631 ("net: libwx: support hardware statistics") Cc: stable(a)vger.kernel.org Signed-off-by: Jiawen Wu <jiawenwu(a)trustnetic.com> Reviewed-by: Simon Horman <horms(a)kernel.org> Link: https://patch.msgid.link/DA229A4F58B70E51+20250714015656.91772-1-jiawenwu@t… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c index 4cce07a69891..f0823aa1ede6 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c @@ -2777,6 +2777,8 @@ void wx_update_stats(struct wx *wx) hwstats->fdirmiss += rd32(wx, WX_RDB_FDIR_MISS); } + /* qmprc is not cleared on read, manual reset it */ + hwstats->qmprc = 0; for (i = wx->num_vfs * wx->num_rx_queues_per_pool; i < wx->mac.max_rx_queues; i++) hwstats->qmprc += rd32(wx, WX_PX_MPRC(i));

2 months, 3 weeks

4
5
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FAILED: patch "[PATCH] net: libwx: fix multicast packets received count" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 2b30a3d1ec2538a1fd363fde746b9fe1d38abc77 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025072137-disarm-donator-b329@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 2b30a3d1ec2538a1fd363fde746b9fe1d38abc77 Mon Sep 17 00:00:00 2001 From: Jiawen Wu <jiawenwu(a)trustnetic.com> Date: Mon, 14 Jul 2025 09:56:56 +0800 Subject: [PATCH] net: libwx: fix multicast packets received count Multicast good packets received by PF rings that pass ethternet MAC address filtering are counted for rtnl_link_stats64.multicast. The counter is not cleared on read. Fix the duplicate counting on updating statistics. Fixes: 46b92e10d631 ("net: libwx: support hardware statistics") Cc: stable(a)vger.kernel.org Signed-off-by: Jiawen Wu <jiawenwu(a)trustnetic.com> Reviewed-by: Simon Horman <horms(a)kernel.org> Link: https://patch.msgid.link/DA229A4F58B70E51+20250714015656.91772-1-jiawenwu@t… Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c index 4cce07a69891..f0823aa1ede6 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c @@ -2777,6 +2777,8 @@ void wx_update_stats(struct wx *wx) hwstats->fdirmiss += rd32(wx, WX_RDB_FDIR_MISS); } + /* qmprc is not cleared on read, manual reset it */ + hwstats->qmprc = 0; for (i = wx->num_vfs * wx->num_rx_queues_per_pool; i < wx->mac.max_rx_queues; i++) hwstats->qmprc += rd32(wx, WX_PX_MPRC(i));

2 months, 3 weeks

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FAILED: patch "[PATCH] rust: use `#[used(compiler)]` to fix build and `modpost` with" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 7498159226772d66f150dd406be462d75964a366 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025072102-theorize-single-3700@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7498159226772d66f150dd406be462d75964a366 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda <ojeda(a)kernel.org> Date: Sat, 12 Jul 2025 18:01:03 +0200 Subject: [PATCH] rust: use `#[used(compiler)]` to fix build and `modpost` with Rust >= 1.89.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Starting with Rust 1.89.0 (expected 2025-08-07), the Rust compiler fails to build the `rusttest` target due to undefined references such as: kernel...-cgu.0:(.text....+0x116): undefined reference to `rust_helper_kunit_get_current_test' Moreover, tooling like `modpost` gets confused: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/gpu/drm/nova/nova.o ERROR: modpost: missing MODULE_LICENSE() in drivers/gpu/nova-core/nova_core.o The reason behind both issues is that the Rust compiler will now [1] treat `#[used]` as `#[used(linker)]` instead of `#[used(compiler)]` for our targets. This means that the retain section flag (`R`, `SHF_GNU_RETAIN`) will be used and that they will be marked as `unique` too, with different IDs. In turn, that means we end up with undefined references that did not get discarded in `rusttest` and that multiple `.modinfo` sections are generated, which confuse tooling like `modpost` because they only expect one. Thus start using `#[used(compiler)]` to keep the previous behavior and to be explicit about what we want. Sadly, it is an unstable feature (`used_with_arg`) [2] -- we will talk to upstream Rust about it. The good news is that it has been available for a long time (Rust >= 1.60) [3]. The changes should also be fine for previous Rust versions, since they behave the same way as before [4]. Alternatively, we could use `#[no_mangle]` or `#[export_name = ...]` since those still behave like `#[used(compiler)]`, but of course it is not really what we want to express, and it requires other changes to avoid symbol conflicts. Cc: David Wood <david(a)davidtw.co> Cc: Wesley Wiser <wwiser(a)gmail.com> Cc: stable(a)vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs). Link: https://github.com/rust-lang/rust/pull/140872 [1] Link: https://github.com/rust-lang/rust/issues/93798 [2] Link: https://github.com/rust-lang/rust/pull/91504 [3] Link: https://godbolt.org/z/sxzWTMfzW [4] Reviewed-by: Alice Ryhl <aliceryhl(a)google.com> Acked-by: Björn Roy Baron <bjorn3_gh(a)protonmail.com> Link: https://lore.kernel.org/r/20250712160103.1244945-3-ojeda@kernel.org Signed-off-by: Miguel Ojeda <ojeda(a)kernel.org> diff --git a/rust/Makefile b/rust/Makefile index 27dec7904c3a..115b63b7d1e3 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -194,6 +194,7 @@ quiet_cmd_rustdoc_test = RUSTDOC T $< RUST_MODFILE=test.rs \ OBJTREE=$(abspath $(objtree)) \ $(RUSTDOC) --test $(rust_common_flags) \ + -Zcrate-attr='feature(used_with_arg)' \ @$(objtree)/include/generated/rustc_cfg \ $(rustc_target_flags) $(rustdoc_test_target_flags) \ $(rustdoc_test_quiet) \ diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index 2494c96e105f..4fe621f35716 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -202,7 +202,7 @@ macro_rules! module_firmware { }; #[link_section = ".modinfo"] - #[used] + #[used(compiler)] static __MODULE_FIRMWARE: [u8; $($builder)*::create(__MODULE_FIRMWARE_PREFIX) .build_length()] = $($builder)*::create(__MODULE_FIRMWARE_PREFIX).build(); }; diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 4b8cdcb21e77..b9e65905e121 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -302,7 +302,7 @@ macro_rules! kunit_unsafe_test_suite { is_init: false, }; - #[used] + #[used(compiler)] #[allow(unused_unsafe)] #[cfg_attr(not(target_os = "macos"), link_section = ".kunit_test_suites")] static mut KUNIT_TEST_SUITE_ENTRY: *const ::kernel::bindings::kunit_suite = diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 6b4774b2b1c3..e13d6ed88fa6 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -34,6 +34,9 @@ // Expected to become stable. #![feature(arbitrary_self_types)] // +// To be determined. +#![feature(used_with_arg)] +// // `feature(derive_coerce_pointee)` is expected to become stable. Before Rust // 1.84.0, it did not exist, so enable the predecessor features. #![cfg_attr(CONFIG_RUSTC_HAS_COERCE_POINTEE, feature(derive_coerce_pointee))] diff --git a/rust/macros/module.rs b/rust/macros/module.rs index 2ddd2eeb2852..75efc6eeeafc 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -57,7 +57,7 @@ fn emit_base(&mut self, field: &str, content: &str, builtin: bool) { {cfg} #[doc(hidden)] #[cfg_attr(not(target_os = \"macos\"), link_section = \".modinfo\")] - #[used] + #[used(compiler)] pub static __{module}_{counter}: [u8; {length}] = *{string}; ", cfg = if builtin { @@ -249,7 +249,7 @@ mod __module_init {{ // key or a new section. For the moment, keep it simple. #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] static __IS_RUST_MODULE: () = (); static mut __MOD: ::core::mem::MaybeUninit<{type_}> = @@ -273,7 +273,7 @@ mod __module_init {{ #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] #[link_section = \".init.data\"] static __UNIQUE_ID___addressable_init_module: unsafe extern \"C\" fn() -> i32 = init_module; @@ -293,7 +293,7 @@ mod __module_init {{ #[cfg(MODULE)] #[doc(hidden)] - #[used] + #[used(compiler)] #[link_section = \".exit.data\"] static __UNIQUE_ID___addressable_cleanup_module: extern \"C\" fn() = cleanup_module; @@ -303,7 +303,7 @@ mod __module_init {{ #[cfg(not(CONFIG_HAVE_ARCH_PREL32_RELOCATIONS))] #[doc(hidden)] #[link_section = \"{initcall_section}\"] - #[used] + #[used(compiler)] pub static __{ident}_initcall: extern \"C\" fn() -> ::kernel::ffi::c_int = __{ident}_init; diff --git a/scripts/Makefile.build b/scripts/Makefile.build index a6461ea411f7..ba71b27aa363 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -312,10 +312,11 @@ $(obj)/%.lst: $(obj)/%.c FORCE # - Stable since Rust 1.82.0: `feature(asm_const)`, `feature(raw_ref_op)`. # - Stable since Rust 1.87.0: `feature(asm_goto)`. # - Expected to become stable: `feature(arbitrary_self_types)`. +# - To be determined: `feature(used_with_arg)`. # # Please see https://github.com/Rust-for-Linux/linux/issues/2 for details on # the unstable features in use. -rust_allowed_features := asm_const,asm_goto,arbitrary_self_types,lint_reasons,raw_ref_op +rust_allowed_features := asm_const,asm_goto,arbitrary_self_types,lint_reasons,raw_ref_op,used_with_arg # `--out-dir` is required to avoid temporaries being created by `rustc` in the # current working directory, which may be not accessible in the out-of-tree

2 months, 3 weeks

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[PATCH 6.6.y] erofs: address D-cache aliasing

by Gao Xiang

commit 27917e8194f91dffd8b4825350c63cb68e98ce58 upstream. Flush the D-cache before unlocking folios for compressed inodes, as they are dirtied during decompression. Avoid calling flush_dcache_folio() on every CPU write, since it's more like playing whack-a-mole without real benefit. It has no impact on x86 and arm64/risc-v: on x86, flush_dcache_folio() is a no-op, and on arm64/risc-v, PG_dcache_clean (PG_arch_1) is clear for new page cache folios. However, certain ARM boards are affected, as reported. Fixes: 3883a79abd02 ("staging: erofs: introduce VLE decompression support") Closes: https://lore.kernel.org/r/c1e51e16-6cc6-49d0-a63e-4e9ff6c4dd53@pengutronix.… Closes: https://lore.kernel.org/r/38d43fae-1182-4155-9c5b-ffc7382d9917@siemens.com Tested-by: Jan Kiszka <jan.kiszka(a)siemens.com> Tested-by: Stefan Kerkmann <s.kerkmann(a)pengutronix.de> Link: https://lore.kernel.org/r/20250709034614.2780117-2-hsiangkao@linux.alibaba.… Signed-off-by: Gao Xiang <hsiangkao(a)linux.alibaba.com> --- Hi Jan & Stefan, Please help confirm this 6.6 fix backport if possible. Thanks, Gao Xiang fs/erofs/decompressor.c | 6 ++---- fs/erofs/zdata.c | 32 +++++++++++++++++++------------- 2 files changed, 21 insertions(+), 17 deletions(-) diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c index aa59788a61e6..86e088fd386e 100644 --- a/fs/erofs/decompressor.c +++ b/fs/erofs/decompressor.c @@ -342,14 +342,12 @@ static int z_erofs_transform_plain(struct z_erofs_decompress_req *rq, if (outpages > inpages) { DBG_BUGON(!rq->out[outpages - 1]); - if (rq->out[outpages - 1] != rq->in[inpages - 1]) { + if (rq->out[outpages - 1] != rq->in[inpages - 1]) memcpy_to_page(rq->out[outpages - 1], 0, src + (interlaced_offset ? 0 : righthalf), lefthalf); - } else if (!interlaced_offset) { + else if (!interlaced_offset) memmove(src, src + righthalf, lefthalf); - flush_dcache_page(rq->in[inpages - 1]); - } } kunmap_local(src); return 0; diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 496e4c7c52a4..d852b43ac43e 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -122,9 +122,11 @@ static inline unsigned int z_erofs_pclusterpages(struct z_erofs_pcluster *pcl) /* * bit 30: I/O error occurred on this page + * bit 29: CPU has dirty data in D-cache (needs aliasing handling); * bit 0 - 29: remaining parts to complete this page */ -#define Z_EROFS_PAGE_EIO (1 << 30) +#define Z_EROFS_ONLINEPAGE_EIO 30 +#define Z_EROFS_ONLINEPAGE_DIRTY 29 static inline void z_erofs_onlinepage_init(struct page *page) { @@ -143,7 +145,7 @@ static inline void z_erofs_onlinepage_split(struct page *page) atomic_inc((atomic_t *)&page->private); } -static void z_erofs_onlinepage_endio(struct page *page, int err) +static void z_erofs_onlinepage_end(struct page *page, int err, bool dirty) { int orig, v; @@ -151,16 +153,20 @@ static void z_erofs_onlinepage_endio(struct page *page, int err) do { orig = atomic_read((atomic_t *)&page->private); - v = (orig - 1) | (err ? Z_EROFS_PAGE_EIO : 0); + DBG_BUGON(orig <= 0); + v = dirty << Z_EROFS_ONLINEPAGE_DIRTY; + v |= (orig - 1) | (!!err << Z_EROFS_ONLINEPAGE_EIO); } while (atomic_cmpxchg((atomic_t *)&page->private, orig, v) != orig); - if (!(v & ~Z_EROFS_PAGE_EIO)) { - set_page_private(page, 0); - ClearPagePrivate(page); - if (!(v & Z_EROFS_PAGE_EIO)) - SetPageUptodate(page); - unlock_page(page); - } + if (v & (BIT(Z_EROFS_ONLINEPAGE_DIRTY) - 1)) + return; + set_page_private(page, 0); + ClearPagePrivate(page); + if (v & BIT(Z_EROFS_ONLINEPAGE_DIRTY)) + flush_dcache_page(page); + if (!(v & BIT(Z_EROFS_ONLINEPAGE_EIO))) + SetPageUptodate(page); + unlock_page(page); } #define Z_EROFS_ONSTACK_PAGES 32 @@ -1060,7 +1066,7 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe, goto repeat; out: - z_erofs_onlinepage_endio(page, err); + z_erofs_onlinepage_end(page, err, false); return err; } @@ -1163,7 +1169,7 @@ static void z_erofs_fill_other_copies(struct z_erofs_decompress_backend *be, cur += len; } kunmap_local(dst); - z_erofs_onlinepage_endio(bvi->bvec.page, err); + z_erofs_onlinepage_end(bvi->bvec.page, err, true); list_del(p); kfree(bvi); } @@ -1333,7 +1339,7 @@ static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, /* recycle all individual short-lived pages */ if (z_erofs_put_shortlivedpage(be->pagepool, page)) continue; - z_erofs_onlinepage_endio(page, err); + z_erofs_onlinepage_end(page, err, true); } if (be->decompressed_pages != be->onstack_pages) -- 2.43.5

2 months, 3 weeks

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FAILED: patch "[PATCH] x86/mce/amd: Add default names for MCA banks and blocks" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x d66e1e90b16055d2f0ee76e5384e3f119c3c2773 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025071202-cycling-woof-6cf6@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From d66e1e90b16055d2f0ee76e5384e3f119c3c2773 Mon Sep 17 00:00:00 2001 From: Yazen Ghannam <yazen.ghannam(a)amd.com> Date: Tue, 24 Jun 2025 14:15:58 +0000 Subject: [PATCH] x86/mce/amd: Add default names for MCA banks and blocks Ensure that sysfs init doesn't fail for new/unrecognized bank types or if a bank has additional blocks available. Most MCA banks have a single thresholding block, so the block takes the same name as the bank. Unified Memory Controllers (UMCs) are a special case where there are two blocks and each has a unique name. However, the microarchitecture allows for five blocks. Any new MCA bank types with more than one block will be missing names for the extra blocks. The MCE sysfs will fail to initialize in this case. Fixes: 87a6d4091bd7 ("x86/mce/AMD: Update sysfs bank names for SMCA systems") Signed-off-by: Yazen Ghannam <yazen.ghannam(a)amd.com> Signed-off-by: Borislav Petkov (AMD) <bp(a)alien8.de> Cc: stable(a)vger.kernel.org Link: https://lore.kernel.org/20250624-wip-mca-updates-v4-3-236dd74f645f@amd.com diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index 9d852c3b2cb5..6820ebce5d46 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -1113,13 +1113,20 @@ static const char *get_name(unsigned int cpu, unsigned int bank, struct threshol } bank_type = smca_get_bank_type(cpu, bank); - if (bank_type >= N_SMCA_BANK_TYPES) - return NULL; if (b && (bank_type == SMCA_UMC || bank_type == SMCA_UMC_V2)) { if (b->block < ARRAY_SIZE(smca_umc_block_names)) return smca_umc_block_names[b->block]; - return NULL; + } + + if (b && b->block) { + snprintf(buf_mcatype, MAX_MCATYPE_NAME_LEN, "th_block_%u", b->block); + return buf_mcatype; + } + + if (bank_type >= N_SMCA_BANK_TYPES) { + snprintf(buf_mcatype, MAX_MCATYPE_NAME_LEN, "th_bank_%u", bank); + return buf_mcatype; } if (per_cpu(smca_bank_counts, cpu)[bank_type] == 1)

2 months, 3 weeks

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[PATCH 1/2] dt-bindings: display: sprd,sharkl3-dpu: Fix missing clocks constraints

by Krzysztof Kozlowski

'minItems' alone does not impose upper bound, unlike 'maxItems' which implies lower bound. Add missing clock constraint so the list will have exact number of items (clocks). Fixes: 8cae15c60cf0 ("dt-bindings: display: add Unisoc's dpu bindings") Cc: <stable(a)vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> --- .../devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml index 4ebea60b8c5b..8c52fa0ea5f8 100644 --- a/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml +++ b/Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dpu.yaml @@ -25,7 +25,7 @@ properties: maxItems: 1 clocks: - minItems: 2 + maxItems: 2 clock-names: items: -- 2.48.1

2 months, 3 weeks

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