linux.git/arch, branch v5.5-rc5

Merge tag 'riscv/for-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2020-01-05T19:15:31+00:00

Pull RISC-V fixes from Paul Walmsley:
 "Several fixes for RISC-V:

   - Fix function graph trace support

   - Prefix the CSR IRQ_* macro names with "RV_", to avoid collisions
     with macros elsewhere in the Linux kernel tree named "IRQ_TIMER"

   - Use __pa_symbol() when computing the physical address of a kernel
     symbol, rather than __pa()

   - Mark the RISC-V port as supporting GCOV

  One DT addition:

   - Describe the L2 cache controller in the FU540 DT file

  One documentation update:

   - Add patch acceptance guideline documentation"

* tag 'riscv/for-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  Documentation: riscv: add patch acceptance guidelines
  riscv: prefix IRQ_ macro names with an RV_ namespace
  clocksource: riscv: add notrace to riscv_sched_clock
  riscv: ftrace: correct the condition logic in function graph tracer
  riscv: dts: Add DT support for SiFive L2 cache controller
  riscv: gcov: enable gcov for RISC-V
  riscv: mm: use __pa_symbol for kernel symbols

riscv: prefix IRQ_ macro names with an RV_ namespace

2020-01-05T05:48:59+00:00

"IRQ_TIMER", used in the arch/riscv CSR header file, is a sufficiently
generic macro name that it's used by several source files across the
Linux code base.  Some of these other files ultimately include the
arch/riscv CSR include file, causing collisions.  Fix by prefixing the
RISC-V csr.h IRQ_ macro names with an RV_ prefix.

Fixes: a4c3733d32a72 ("riscv: abstract out CSR names for supervisor vs machine mode")
Reported-by: Olof Johansson 
Acked-by: Olof Johansson 
Signed-off-by: Paul Walmsley

Merge branch 'akpm' (patches from Andrew)

2020-01-05T03:38:51+00:00

Merge misc fixes from Andrew Morton:
 "17 fixes"

* emailed patches from Andrew Morton :
  hexagon: define ioremap_uc
  ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less
  ocfs2: call journal flush to mark journal as empty after journal recovery when mount
  mm/hugetlb: defer freeing of huge pages if in non-task context
  mm/gup: fix memory leak in __gup_benchmark_ioctl
  mm/oom: fix pgtables units mismatch in Killed process message
  fs/posix_acl.c: fix kernel-doc warnings
  hexagon: work around compiler crash
  hexagon: parenthesize registers in asm predicates
  fs/namespace.c: make to_mnt_ns() static
  fs/nsfs.c: include headers for missing declarations
  fs/direct-io.c: include fs/internal.h for missing prototype
  mm: move_pages: return valid node id in status if the page is already on the target node
  memcg: account security cred as well to kmemcg
  kcov: fix struct layout for kcov_remote_arg
  mm/zsmalloc.c: fix the migrated zspage statistics.
  mm/memory_hotplug: shrink zones when offlining memory

Merge tag 'mips_fixes_5.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2020-01-04T22:16:57+00:00

Pull MIPS fixes from Paul Burton:
 "A collection of MIPS fixes:

   - Fill the struct cacheinfo shared_cpu_map field with sensible
     values, notably avoiding issues with perf which was unhappy in the
     absence of these values.

   - A boot fix for Loongson 2E & 2F machines which was fallout from
     some refactoring performed this cycle.

   - A Kconfig dependency fix for the Loongson CPU HWMon driver.

   - A couple of VDSO fixes, ensuring gettimeofday() behaves
     appropriately for kernel configurations that don't include support
     for a clocksource the VDSO can use & fixing the calling convention
     for the n32 & n64 VDSOs which would previously clobber the $gp/$28
     register.

   - A build fix for vmlinuz compressed images which were
     inappropriately building with -fsanitize-coverage despite not being
     part of the kernel proper, then failing to link due to the missing
     __sanitizer_cov_trace_pc() function.

   - A couple of eBPF JIT fixes, including disabling it for MIPS32 due
     to a large number of issues with the code generated there &
     reflecting ISA dependencies in Kconfig to enforce that systems
     which don't support the JIT must include the interpreter"

* tag 'mips_fixes_5.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Avoid VDSO ABI breakage due to global register variable
  MIPS: BPF: eBPF JIT: check for MIPS ISA compliance in Kconfig
  MIPS: BPF: Disable MIPS32 eBPF JIT
  MIPS: Prevent link failure with kcov instrumentation
  MIPS: Kconfig: Use correct form for 'depends on'
  mips: Fix gettimeofday() in the vdso library
  MIPS: Fix boot on Fuloong2 systems
  mips: cacheinfo: report shared CPU map

hexagon: define ioremap_uc

2020-01-04T21:55:09+00:00

Similar to commit 38e45d81d14e ("sparc64: implement ioremap_uc") define
ioremap_uc for hexagon to avoid errors from
-Wimplicit-function-definition.

Link: http://lkml.kernel.org/r/20191209222956.239798-2-ndesaulniers@google.com
Link: https://github.com/ClangBuiltLinux/linux/issues/797
Fixes: e537654b7039 ("lib: devres: add a helper function for ioremap_uc")
Signed-off-by: Nick Desaulniers 
Suggested-by: Nathan Chancellor 
Acked-by: Brian Cain 
Cc: Lee Jones 
Cc: Andy Shevchenko 
Cc: Tuowen Zhao 
Cc: Mika Westerberg 
Cc: Luis Chamberlain 
Cc: Greg Kroah-Hartman 
Cc: Alexios Zavras 
Cc: Allison Randal 
Cc: Will Deacon 
Cc: Richard Fontana 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Boqun Feng 
Cc: Ingo Molnar 
Cc: Geert Uytterhoeven 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hexagon: work around compiler crash

2020-01-04T21:55:09+00:00

Clang cannot translate the string "r30" into a valid register yet.

Link: https://github.com/ClangBuiltLinux/linux/issues/755
Link: http://lkml.kernel.org/r/20191028155722.23419-1-ndesaulniers@google.com
Signed-off-by: Nick Desaulniers 
Suggested-by: Sid Manning 
Reviewed-by: Brian Cain 
Cc: Allison Randal 
Cc: Greg Kroah-Hartman 
Cc: Richard Fontana 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hexagon: parenthesize registers in asm predicates

2020-01-04T21:55:09+00:00

Hexagon requires that register predicates in assembly be parenthesized.

Link: https://github.com/ClangBuiltLinux/linux/issues/754
Link: http://lkml.kernel.org/r/20191209222956.239798-3-ndesaulniers@google.com
Signed-off-by: Nick Desaulniers 
Suggested-by: Sid Manning 
Acked-by: Brian Cain 
Cc: Lee Jones 
Cc: Andy Shevchenko 
Cc: Tuowen Zhao 
Cc: Mika Westerberg 
Cc: Luis Chamberlain 
Cc: Greg Kroah-Hartman 
Cc: Alexios Zavras 
Cc: Allison Randal 
Cc: Will Deacon 
Cc: Richard Fontana 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Boqun Feng 
Cc: Ingo Molnar 
Cc: Geert Uytterhoeven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/memory_hotplug: shrink zones when offlining memory

2020-01-04T21:55:08+00:00

We currently try to shrink a single zone when removing memory.  We use
the zone of the first page of the memory we are removing.  If that
memmap was never initialized (e.g., memory was never onlined), we will
read garbage and can trigger kernel BUGs (due to a stale pointer):

    BUG: unable to handle page fault for address: 000000000000353d
    #PF: supervisor write access in kernel mode
    #PF: error_code(0x0002) - not-present page
    PGD 0 P4D 0
    Oops: 0002 [#1] SMP PTI
    CPU: 1 PID: 7 Comm: kworker/u8:0 Not tainted 5.3.0-rc5-next-20190820+ #317
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.4
    Workqueue: kacpi_hotplug acpi_hotplug_work_fn
    RIP: 0010:clear_zone_contiguous+0x5/0x10
    Code: 48 89 c6 48 89 c3 e8 2a fe ff ff 48 85 c0 75 cf 5b 5d c3 c6 85 fd 05 00 00 01 5b 5d c3 0f 1f 840
    RSP: 0018:ffffad2400043c98 EFLAGS: 00010246
    RAX: 0000000000000000 RBX: 0000000200000000 RCX: 0000000000000000
    RDX: 0000000000200000 RSI: 0000000000140000 RDI: 0000000000002f40
    RBP: 0000000140000000 R08: 0000000000000000 R09: 0000000000000001
    R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000140000
    R13: 0000000000140000 R14: 0000000000002f40 R15: ffff9e3e7aff3680
    FS:  0000000000000000(0000) GS:ffff9e3e7bb00000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000000000000353d CR3: 0000000058610000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
     __remove_pages+0x4b/0x640
     arch_remove_memory+0x63/0x8d
     try_remove_memory+0xdb/0x130
     __remove_memory+0xa/0x11
     acpi_memory_device_remove+0x70/0x100
     acpi_bus_trim+0x55/0x90
     acpi_device_hotplug+0x227/0x3a0
     acpi_hotplug_work_fn+0x1a/0x30
     process_one_work+0x221/0x550
     worker_thread+0x50/0x3b0
     kthread+0x105/0x140
     ret_from_fork+0x3a/0x50
    Modules linked in:
    CR2: 000000000000353d

Instead, shrink the zones when offlining memory or when onlining failed.
Introduce and use remove_pfn_range_from_zone(() for that.  We now
properly shrink the zones, even if we have DIMMs whereby

 - Some memory blocks fall into no zone (never onlined)

 - Some memory blocks fall into multiple zones (offlined+re-onlined)

 - Multiple memory blocks that fall into different zones

Drop the zone parameter (with a potential dubious value) from
__remove_pages() and __remove_section().

Link: http://lkml.kernel.org/r/20191006085646.5768-6-david@redhat.com
Fixes: f1dd2cd13c4b ("mm, memory_hotplug: do not associate hotadded memory to zones until online")	[visible after d0dc12e86b319]
Signed-off-by: David Hildenbrand 
Reviewed-by: Oscar Salvador 
Cc: Michal Hocko 
Cc: "Matthew Wilcox (Oracle)" 
Cc: "Aneesh Kumar K.V" 
Cc: Pavel Tatashin 
Cc: Greg Kroah-Hartman 
Cc: Dan Williams 
Cc: Logan Gunthorpe 
Cc: 	[5.0+]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'powerpc-5.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2020-01-03T19:13:50+00:00

Pull powerpc fixes from Michael Ellerman:
 "Two more powerpc fixes for 5.5:

   - One commit to fix a build error when CONFIG_JUMP_LABEL=n,
     introduced by our recent fix to is_shared_processor().

   - A commit marking some SLB related functions as notrace, as tracing
     them triggers warnings.

  Thanks to Jason A Donenfeld"

* tag 'powerpc-5.5-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/spinlocks: Include correct header for static key
  powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace

riscv: ftrace: correct the condition logic in function graph tracer

2020-01-03T08:56:37+00:00

The condition should be logical NOT to assign the hook address to parent
address. Because the return value 0 of function_graph_enter upon
success.

Fixes: e949b6db51dc (riscv/function_graph: Simplify with function_graph_enter())
Signed-off-by: Zong Li 
Reviewed-by: Steven Rostedt (VMware) 
Cc: stable@vger.kernel.org
Signed-off-by: Paul Walmsley