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    • Hanjun Guo's avatar
      ARM64 / SMP: Switch pr_err() to pr_debug() for disabled GICC entry · f9058929
      Hanjun Guo authored 
      

It is normal that firmware presents GICC entry or entries (processors)
with disabled flag in ACPI MADT, taking a system of 16 cpus for example,
ACPI firmware may present 8 ebabled first with another 8 cpus disabled
in MADT, the disabled cpus can be hot-added later.

Firmware may also present more cpus than the hardware actually has, but
disabled the unused ones, and easily enable it when the hardware has such
cpus to make the firmware code scalable.

So that's not an error for disabled cpus in MADT, we can switch pr_err()
to pr_debug() to make the boot a little quieter by default.

Since hwid for disabled cpus often are invalid, and we check invalid hwid
first in the code, for use case that hot add cpus later will be filtered
out and will not be counted in possible cups, so move this check before
the hwid one to prepare the code to count for disabeld cpus when cpu
hot-plug is introduced.

Signed-off-by: default avatarHanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: default avatarAl Stone <ahs3@redhat.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      f9058929
    • Tony Luck's avatar
      [IA64] Drop debug test/printk that some special pages are marked reserved · 43c518d1
      Tony Luck authored 
      In commit 92923ca3 "mm: meminit: only set page reserved in the memblock region"
we dropped setting the reserved bits for all pages. This results in some warnings
on ia64:

put_kernel_page: page at 0xe000000005588000 not in reserved memory
put_kernel_page: page at 0xe000000005588000 not in reserved memory
put_kernel_page: page at 0xe000000005580000 not in reserved memory
put_kernel_page: page at 0xe000000005580000 not in reserved memory
put_kernel_page: page at 0xe000000005580000 not in reserved memory
put_kernel_page: page at 0xe000000005580000 not in reserved memory

the two different pages match up with two objects from the loaded kernel
that get mapped by arch/ia64/mm/init.c:setup_gate()

a000000101588000 D __start_gate_section
a000000101580000 D empty_zero_page

In a discussion with Mel Gorman:
  http://lkml.kernel.org/r/20150526102219.GB13750%40suse.de


he suggested that while the preferred approach might be to
set the reserved bit for these pages, it would also be OK
to just drop the test:
   "as it's a debugging check that is ia-64 specific"

After hunting around a bit and failin to find a good place to mark these
pages as reserved - I decided to just delete the test.

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
      43c518d1
    • Jisheng Zhang's avatar
      arm64: cpuidle: add __init section marker to arm_cpuidle_init · ea389daa
      Jisheng Zhang authored 
      

It is not needed after booting, this patch moves the arm_cpuidle_init()
function to the __init section.

Signed-off-by: default avatarJisheng Zhang <jszhang@marvell.com>
Reviewed-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      ea389daa
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