linux.git/arch/riscv/kernel, branch v5.15

riscv: fix misalgned trap vector base address

2021-10-27T20:08:01+00:00

The trap vector marked by label .Lsecondary_park must align on a
4-byte boundary, as the {m,s}tvec is defined to require 4-byte
alignment.

Signed-off-by: Chen Lu <181250012@smail.nju.edu.cn>
Reviewed-by: Anup Patel 
Fixes: e011995e826f ("RISC-V: Move relocate and few other functions out of __init")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt

riscv/vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

2021-10-02T20:42:26+00:00

riscv architectures relying on mmap_sem for write in their
arch_setup_additional_pages. If the waiting task gets killed by the oom
killer it would block oom_reaper from asynchronous address space reclaim
and reduce the chances of timely OOM resolving.  Wait for the lock in
the killable mode and return with EINTR if the task got killed while
waiting.

Signed-off-by: Tong Tiangen 
Reviewed-by: Kefeng Wang 
Fixes: 76d2a0493a17 ("RISC-V: Init and Halt Code")
Signed-off-by: Palmer Dabbelt

riscv/vdso: Move vdso data page up front

2021-10-02T20:42:25+00:00

As commit 601255ae3c98 ("arm64: vdso: move data page before code pages"), the
same issue exists on riscv, testcase is shown below, make sure that vdso.so is
bigger than page size,

  struct timespec tp;
  clock_gettime(5, &tp);
  printf("tv_sec: %ld, tv_nsec: %ld\n", tp.tv_sec, tp.tv_nsec);

without this patch, test result : tv_sec: 0, tv_nsec: 0
   with this patch, test result : tv_sec: 1629271537, tv_nsec: 748000000

Move the vdso data page in front of the VDSO area to fix the issue.

Fixes: ad5d1122b82fb ("riscv: use vDSO common flow to reduce the latency of the time-related functions")
Signed-off-by: Tong Tiangen 
Reviewed-by: Kefeng Wang 
Signed-off-by: Palmer Dabbelt

riscv/vdso: Refactor asm/vdso.h

2021-10-02T20:42:23+00:00

The asm/vdso.h will be included in vdso.lds.S in the next patch, the
following cleanup is needed to avoid syntax error:

 1.the declaration of sys_riscv_flush_icache() is moved into asm/syscall.h.
 2.the definition of struct vdso_data is moved into kernel/vdso.c.
 2.the definition of VDSO_SYMBOL is placed under "#ifndef __ASSEMBLY__".

Also remove the redundant linux/types.h include.

Signed-off-by: Tong Tiangen 
Reviewed-by: Kefeng Wang 
Signed-off-by: Palmer Dabbelt

Merge tag 'smp-urgent-2021-09-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2021-09-12T19:42:51+00:00

Pull CPU hotplug updates from Thomas Gleixner:
 "Updates for the SMP and CPU hotplug:

   - Remove DEFINE_SMP_CALL_CACHE_FUNCTION() which is a left over of the
     original hotplug code and now causing trouble with the ARM64 cache
     topology setup due to the pointless SMP function call.

     It's not longer required as the hotplug callbacks are guaranteed to
     be invoked on the upcoming CPU.

   - Remove the deprecated and now unused CPU hotplug functions

   - Rewrite the CPU hotplug API documentation"

* tag 'smp-urgent-2021-09-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Documentation: core-api/cpuhotplug: Rewrite the API section
  cpu/hotplug: Remove deprecated CPU-hotplug functions.
  thermal: Replace deprecated CPU-hotplug functions.
  drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()

Merge tag 'riscv-for-linus-5.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2021-09-11T21:29:42+00:00

Pull more RISC-V updates from Palmer Dabbelt:

 - A pair of defconfig additions, for NVMe and the EFI filesystem
   localization options.

 - A larger address space for stack randomization.

 - A cleanup to our install rules.

 - A DTS update for the Microchip Icicle board, to fix the serial
   console.

 - Support for build-time table sorting, which allows us to have
   __ex_table read-only.

* tag 'riscv-for-linus-5.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Move EXCEPTION_TABLE to RO_DATA segment
  riscv: Enable BUILDTIME_TABLE_SORT
  riscv: dts: microchip: mpfs-icicle: Fix serial console
  riscv: move the (z)install rules to arch/riscv/Makefile
  riscv: Improve stack randomisation on RV64
  riscv: defconfig: enable NLS_CODEPAGE_437, NLS_ISO8859_1
  riscv: defconfig: enable BLK_DEV_NVME

riscv: Move EXCEPTION_TABLE to RO_DATA segment

2021-09-11T06:59:48+00:00

_ex_table section is read-only, so move it to RO_DATA.

Signed-off-by: Jisheng Zhang 
Signed-off-by: Palmer Dabbelt

Merge branch 'linus' into smp/urgent

2021-09-10T22:38:47+00:00

Ensure that all usage sites of get/put_online_cpus() except for the
struggler in drivers/thermal are gone. So the last user and the deprecated
inlines can be removed.

Merge branch 'akpm' (patches from Andrew)

2021-09-08T19:55:35+00:00

Merge more updates from Andrew Morton:
 "147 patches, based on 7d2a07b769330c34b4deabeed939325c77a7ec2f.

  Subsystems affected by this patch series: mm (memory-hotplug, rmap,
  ioremap, highmem, cleanups, secretmem, kfence, damon, and vmscan),
  alpha, percpu, procfs, misc, core-kernel, MAINTAINERS, lib,
  checkpatch, epoll, init, nilfs2, coredump, fork, pids, criu, kconfig,
  selftests, ipc, and scripts"

* emailed patches from Andrew Morton : (94 commits)
  scripts: check_extable: fix typo in user error message
  mm/workingset: correct kernel-doc notations
  ipc: replace costly bailout check in sysvipc_find_ipc()
  selftests/memfd: remove unused variable
  Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH
  configs: remove the obsolete CONFIG_INPUT_POLLDEV
  prctl: allow to setup brk for et_dyn executables
  pid: cleanup the stale comment mentioning pidmap_init().
  kernel/fork.c: unexport get_{mm,task}_exe_file
  coredump: fix memleak in dump_vma_snapshot()
  fs/coredump.c: log if a core dump is aborted due to changed file permissions
  nilfs2: use refcount_dec_and_lock() to fix potential UAF
  nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
  nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group
  nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group
  nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group
  nilfs2: fix NULL pointer in nilfs_##name##_attr_release
  nilfs2: fix memory leak in nilfs_sysfs_create_device_group
  trap: cleanup trap_init()
  init: move usermodehelper_enable() to populate_rootfs()
  ...

trap: cleanup trap_init()

2021-09-08T18:50:27+00:00

There are some empty trap_init() definitions in different ARCHs, Introduce
a new weak trap_init() function to clean them up.

Link: https://lkml.kernel.org/r/20210812123602.76356-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang 
Acked-by: Russell King (Oracle) 	[arm32]
Acked-by: Vineet Gupta						[arc]
Acked-by: Michael Ellerman 			[powerpc]
Cc: Yoshinori Sato 
Cc: Ley Foon Tan 
Cc: Jonas Bonn 
Cc: Stefan Kristiansson 
Cc: Stafford Horne 
Cc: James E.J. Bottomley 
Cc: Helge Deller 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Paul Walmsley 
Cc: Jeff Dike 
Cc: Richard Weinberger 
Cc: Anton Ivanov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds