linux-dev/arch/csky/kernel, branch master

kbuild: use obj-y instead extra-y for objects placed at the head

2022-10-02T09:04:05Z

The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada Tested-by: Nick Desaulniers Reviewed-by: Nicolas Schier

Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-08-07T17:03:24Z

Pull misc updates from Andrew Morton: "Updates to various subsystems which I help look after. lib, ocfs2, fatfs, autofs, squashfs, procfs, etc. A relatively small amount of material this time" * tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits) scripts/gdb: ensure the absolute path is generated on initial source MAINTAINERS: kunit: add David Gow as a maintainer of KUnit mailmap: add linux.dev alias for Brendan Higgins mailmap: update Kirill's email profile: setup_profiling_timer() is moslty not implemented ocfs2: fix a typo in a comment ocfs2: use the bitmap API to simplify code ocfs2: remove some useless functions lib/mpi: fix typo 'the the' in comment proc: add some (hopefully) insightful comments bdi: remove enum wb_congested_state kernel/hung_task: fix address space of proc_dohung_task_timeout_secs lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t() squashfs: support reading fragments in readahead call squashfs: implement readahead squashfs: always build "file direct" version of page actor Revert "squashfs: provide backing_dev_info in order to disable read-ahead" fs/ocfs2: Fix spelling typo in comment ia64: old_rr4 added under CONFIG_HUGETLB_PAGE proc: fix test for "vsyscall=xonly" boot option ...

Merge tag 'csky-for-linus-6.0-rc1' of https://github.com/c-sky/csky-linux

2022-08-04T22:27:20Z

Pull csky updates from Guo Ren: - Add jump-label implementation - Add qspinlock support - Enable ARCH_INLINE_READ*/WRITE*/SPIN* - Some fixups and a coding convention * tag 'csky-for-linus-6.0-rc1' of https://github.com/c-sky/csky-linux: csky: abiv1: Fixup compile error csky: cmpxchg: Coding convention for BUILD_BUG() csky: Enable ARCH_INLINE_READ*/WRITE*/SPIN* csky: Add qspinlock support csky: Add jump-label implementation csky: Move HEAD_TEXT_SECTION out of __init_begin-end csky: Correct position of _stext csky: Use the bitmap API to allocate bitmaps csky/kprobe: reclaim insn_slot on kprobe unregistration

csky: Add jump-label implementation

2022-07-30T15:12:03Z

Add jump-label implementation for static branch Signed-off-by: Guo Ren Signed-off-by: Guo Ren

profile: setup_profiling_timer() is moslty not implemented

2022-07-30T01:12:36Z

The setup_profiling_timer() is mostly un-implemented by many architectures. In many places it isn't guarded by CONFIG_PROFILE which is needed for it to be used. Make it a weak symbol in kernel/profile.c and remove the 'return -EINVAL' implementations from the kenrel. There are a couple of architectures which do return 0 from the setup_profiling_timer() function but they don't seem to do anything else with it. To keep the /proc compatibility for now, leave these for a future update or removal. On ARM, this fixes the following sparse warning: arch/arm/kernel/smp.c:793:5: warning: symbol 'setup_profiling_timer' was not declared. Should it be static? Link: https://lkml.kernel.org/r/20220721195509.418205-1-ben-linux@fluff.org Signed-off-by: Ben Dooks Signed-off-by: Andrew Morton

csky: Move HEAD_TEXT_SECTION out of __init_begin-end

2022-07-23T01:36:14Z

Prevent HEAD_TEXT_SECTION back into the buddy system. Signed-off-by: Guo Ren Signed-off-by: Guo Ren

csky: Correct position of _stext

2022-07-23T01:36:14Z

Correct position of _stext to prevent check_kernel_text_object warning [1]. [1] https://lore.kernel.org/linux-csky/YfLpNkmlvoR8iPcq@ls3530/ Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Helge Deller

csky/kprobe: reclaim insn_slot on kprobe unregistration

2022-07-23T01:36:14Z

On kprobe registration kernel allocate one insn_slot for new kprobe, but it forget to reclaim the insn_slot on unregistration, leading to a potential leakage. Reported-by: Chen Guokai Reviewed-by: Masami Hiramatsu (Google) Signed-off-by: Liao Chang Signed-off-by: Guo Ren

context_tracking: Split user tracking Kconfig

2022-06-30T00:04:09Z

Context tracking is going to be used not only to track user transitions but also idle/IRQs/NMIs. The user tracking part will then become a separate feature. Prepare Kconfig for that. [ frederic: Apply Max Filippov feedback. ] Signed-off-by: Frederic Weisbecker Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Neeraj Upadhyay Cc: Uladzislau Rezki Cc: Joel Fernandes Cc: Boqun Feng Cc: Nicolas Saenz Julienne Cc: Marcelo Tosatti Cc: Xiongfeng Wang Cc: Yu Liao Cc: Phil Auld Cc: Paul Gortmaker Cc: Alex Belits Signed-off-by: Paul E. McKenney Reviewed-by: Nicolas Saenz Julienne Tested-by: Nicolas Saenz Julienne

context_tracking: Rename context_tracking_user_enter/exit() to user_enter/exit_callable()

2022-06-30T00:03:27Z

context_tracking_user_enter() and context_tracking_user_exit() are ASM callable versions of user_enter() and user_exit() for architectures that didn't manage to check the context tracking static key from ASM. Change those function names to better reflect their purpose. [ frederic: Apply Max Filippov feedback. ] Signed-off-by: Frederic Weisbecker Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Neeraj Upadhyay Cc: Uladzislau Rezki Cc: Joel Fernandes Cc: Boqun Feng Cc: Nicolas Saenz Julienne Cc: Marcelo Tosatti Cc: Xiongfeng Wang Cc: Yu Liao Cc: Phil Auld Cc: Paul Gortmaker Cc: Alex Belits Signed-off-by: Paul E. McKenney Reviewed-by: Nicolas Saenz Julienne Tested-by: Nicolas Saenz Julienne