linux/arch/arm/mm, branch master

ARM: 9284/1: include from proc-macros.S to fix -Wundef warnings

2023-01-11T16:22:05Z

Since commit 80b6093b55e3 ("kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds"), building with W=1 detects -Wundef warnings for assembly code. $ make W=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- arch/arm/mm/ [snip] AS arch/arm/mm/cache-v7.o In file included from arch/arm/mm/cache-v7.S:17: arch/arm/mm/proc-macros.S:109:5: warning: "L_PTE_SHARED" is not defined, evaluates to 0 [-Wundef] 109 | #if L_PTE_SHARED != PTE_EXT_SHARED | ^~~~~~~~~~~~ arch/arm/mm/proc-macros.S:109:21: warning: "PTE_EXT_SHARED" is not defined, evaluates to 0 [-Wundef] 109 | #if L_PTE_SHARED != PTE_EXT_SHARED | ^~~~~~~~~~~~~~ arch/arm/mm/proc-macros.S:113:10: warning: "L_PTE_XN" is not defined, evaluates to 0 [-Wundef] 113 | (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ | ^~~~~~~~ arch/arm/mm/proc-macros.S:113:19: warning: "L_PTE_USER" is not defined, evaluates to 0 [-Wundef] 113 | (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ | ^~~~~~~~~~ arch/arm/mm/proc-macros.S:113:30: warning: "L_PTE_RDONLY" is not defined, evaluates to 0 [-Wundef] 113 | (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ | ^~~~~~~~~~~~ arch/arm/mm/proc-macros.S:113:43: warning: "L_PTE_DIRTY" is not defined, evaluates to 0 [-Wundef] 113 | (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ | ^~~~~~~~~~~ arch/arm/mm/proc-macros.S:113:55: warning: "L_PTE_YOUNG" is not defined, evaluates to 0 [-Wundef] 113 | (L_PTE_XN+L_PTE_USER+L_PTE_RDONLY+L_PTE_DIRTY+L_PTE_YOUNG+\ | ^~~~~~~~~~~ arch/arm/mm/proc-macros.S:114:10: warning: "L_PTE_PRESENT" is not defined, evaluates to 0 [-Wundef] 114 | L_PTE_PRESENT) > L_PTE_SHARED | ^~~~~~~~~~~~~ arch/arm/mm/proc-macros.S:114:27: warning: "L_PTE_SHARED" is not defined, evaluates to 0 [-Wundef] 114 | L_PTE_PRESENT) > L_PTE_SHARED | ^~~~~~~~~~~~ Include from proc-macros.S to fix the warnings. Signed-off-by: Masahiro Yamada Signed-off-by: Russell King (Oracle)

ARM: 9280/1: mm: fix warning on phys_addr_t to void pointer assignment

2023-01-11T16:20:05Z

zero_page is a void* pointer but memblock_alloc() returns phys_addr_t type so this generates a warning while using clang and with -Wint-error enabled that becomes and error. So let's cast the return of memblock_alloc() to (void *). Cc: # 4.14.x + Fixes: 340a982825f7 ("ARM: 9266/1: mm: fix no-MMU ZERO_PAGE() implementation") Signed-off-by: Giulio Benetti Signed-off-by: Russell King (Oracle)

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2022-12-13T23:22:14Z

Pull ARM updates from Russell King: - update unwinder to cope with module PLTs - enable UBSAN on ARM - improve kernel fault message - update UEFI runtime page tables dump - avoid clang's __aeabi_uldivmod generated in NWFPE code - disable FIQs on CPU shutdown paths - update XOR register usage - a number of build updates (using .arch, thread pointer, removal of lazy evaluation in Makefile) - conversion of stacktrace code to stackwalk - findbit assembly updates - hwcap feature updates for ARMv8 CPUs - instruction dump updates for big-endian platforms - support for function error injection * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits) ARM: 9279/1: support function error injection ARM: 9277/1: Make the dumped instructions are consistent with the disassembled ones ARM: 9276/1: Refactor dump_instr() ARM: 9275/1: Drop '-mthumb' from AFLAGS_ISA ARM: 9274/1: Add hwcap for Speculative Store Bypassing Safe ARM: 9273/1: Add hwcap for Speculation Barrier(SB) ARM: 9272/1: vfp: Add hwcap for FEAT_AA32I8MM ARM: 9271/1: vfp: Add hwcap for FEAT_AA32BF16 ARM: 9270/1: vfp: Add hwcap for FEAT_FHM ARM: 9269/1: vfp: Add hwcap for FEAT_DotProd ARM: 9268/1: vfp: Add hwcap FPHP and ASIMDHP for FEAT_FP16 ARM: 9267/1: Define Armv8 registers in AArch32 state ARM: findbit: add unwinder information ARM: findbit: operate by words ARM: findbit: convert to macros ARM: findbit: provide more efficient ARMv7 implementation ARM: findbit: document ARMv5 bit offset calculation ARM: 9259/1: stacktrace: Convert stacktrace to generic ARCH_STACKWALK ARM: 9258/1: stacktrace: Make stack walk callback consistent with generic code ARM: 9265/1: pass -march= only to compiler ...

Merge tag 'dma-mapping-6.2-2022-12-13' of git://git.infradead.org/users/hch/dma-mapping

2022-12-13T17:05:19Z

Pull dma-mapping updates from Christoph Hellwig: - reduce the swiotlb buffer size on allocation failure (Alexey Kardashevskiy) - clean up passing of bogus GFP flags to the dma-coherent allocator (Christoph Hellwig) * tag 'dma-mapping-6.2-2022-12-13' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: reject __GFP_COMP in dma_alloc_attrs ALSA: memalloc: don't pass bogus GFP_ flags to dma_alloc_* s390/ism: don't pass bogus GFP_ flags to dma_alloc_coherent cnic: don't pass bogus GFP_ flags to dma_alloc_coherent RDMA/qib: don't pass bogus GFP_ flags to dma_alloc_coherent RDMA/hfi1: don't pass bogus GFP_ flags to dma_alloc_coherent media: videobuf-dma-contig: use dma_mmap_coherent swiotlb: reduce the swiotlb buffer size on allocation failure

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2022-12-10T18:14:52Z

Pull ARM fix from Russell King: "One further ARM fix for 6.1 from Wang Kefeng, fixing up the handling for kfence faults" * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 9278/1: kfence: only handle translation faults

ARM: 9278/1: kfence: only handle translation faults

2022-12-07T14:08:09Z

This is a similar fixup like arm64 does, only handle translation faults in case of unexpected kfence report when alignment faults on ARM, see more from commit 0bb1fbffc631 ("arm64: mm: kfence: only handle translation faults"). Fixes: 75969686ec0d ("ARM: 9166/1: Support KFENCE for ARM") Signed-off-by: Kefeng Wang Signed-off-by: Russell King (Oracle)

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2022-11-24T19:10:51Z

Pull ARM fixes from Russell King: "Two fixes for 6.1: - fix stacktraces for tracepoint events in Thumb2 mode - fix for noMMU ZERO_PAGE() implementation" * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 9266/1: mm: fix no-MMU ZERO_PAGE() implementation ARM: 9251/1: perf: Fix stacktraces for tracepoint events in THUMB2 kernels

dma-mapping: reject __GFP_COMP in dma_alloc_attrs

2022-11-21T08:37:20Z

DMA allocations can never be turned back into a page pointer, so requesting compound pages doesn't make sense and it can't even be supported at all by various backends. Reject __GFP_COMP with a warning in dma_alloc_attrs, and stop clearing the flag in the arm dma ops and dma-iommu. Signed-off-by: Christoph Hellwig Acked-by: Marek Szyprowski

ARM: 9263/1: use .arch directives instead of assembler command line flags

2022-11-08T18:36:17Z

Similar to commit a6c30873ee4a ("ARM: 8989/1: use .fpu assembler directives instead of assembler arguments"). GCC and GNU binutils support setting the "sub arch" via -march=, -Wa,-march, target function attribute, and .arch assembler directive. Clang was missing support for -Wa,-march=, but this was implemented in clang-13. The behavior of both GCC and Clang is to prefer -Wa,-march= over -march= for assembler and assembler-with-cpp sources, but Clang will warn about the -march= being unused. clang: warning: argument unused during compilation: '-march=armv6k' [-Wunused-command-line-argument] Since most assembler is non-conditionally assembled with one sub arch (modulo arch/arm/delay-loop.S which conditionally is assembled as armv4 based on CONFIG_ARCH_RPC, and arch/arm/mach-at91/pm-suspend.S which is conditionally assembled as armv7-a based on CONFIG_CPU_V7), prefer the .arch assembler directive. Add a few more instances found in compile testing as found by Arnd and Nathan. Link: https://github.com/llvm/llvm-project/commit/1d51c699b9e2ebc5bcfdbe85c74cc871426333d4 Link: https://bugs.llvm.org/show_bug.cgi?id=48894 Link: https://github.com/ClangBuiltLinux/linux/issues/1195 Link: https://github.com/ClangBuiltLinux/linux/issues/1315 Suggested-by: Arnd Bergmann Suggested-by: Nathan Chancellor Signed-off-by: Arnd Bergmann Tested-by: Nathan Chancellor Signed-off-by: Nick Desaulniers Signed-off-by: Russell King (Oracle)

ARM: 9254/1: mm: Provide better message when kernel fault

2022-11-07T14:19:00Z

If there is a kernel fault, see do_kernel_fault(), we only print the generic "paging request" or "NULL pointer dereference" message which don't show read, write or excute information, let's provide better fault message for them. Signed-off-by: Kefeng Wang Signed-off-by: Russell King (Oracle)