linux.git/arch/arm64/include, branch v4.20

mm: introduce common STRUCT_PAGE_MAX_SHIFT define

2018-12-14T23:05:45+00:00

This define is used by arm64 to calculate the size of the vmemmap
region.  It is defined as the log2 of the upper bound on the size of a
struct page.

We move it into mm_types.h so it can be defined properly instead of set
and checked with a build bug.  This also allows us to use the same
define for riscv.

Link: http://lkml.kernel.org/r/20181107205433.3875-2-logang@deltatee.com
Signed-off-by: Logan Gunthorpe 
Acked-by: Will Deacon 
Acked-by: Andrew Morton 
Acked-by: Ard Biesheuvel 
Acked-by: Catalin Marinas 
Cc: Arnd Bergmann 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arm64: ftrace: Fix to enable syscall events on arm64

2018-11-29T16:53:10+00:00

Since commit 4378a7d4be30 ("arm64: implement syscall wrappers")
introduced "__arm64_" prefix to all syscall wrapper symbols in
sys_call_table, syscall tracer can not find corresponding
metadata from syscall name. In the result, we have no syscall
ftrace events on arm64 kernel, and some bpf testcases are failed
on arm64.

To fix this issue, this introduces custom
arch_syscall_match_sym_name() which skips first 8 bytes when
comparing the syscall and symbol names.

Fixes: 4378a7d4be30 ("arm64: implement syscall wrappers")
Reported-by: Naresh Kamboju 
Signed-off-by: Masami Hiramatsu 
Acked-by: Will Deacon 
Tested-by: Naresh Kamboju 
Cc: stable@vger.kernel.org
Signed-off-by: Catalin Marinas

arm64: Add workaround for Cortex-A76 erratum 1286807

2018-11-29T16:45:45+00:00

On the affected Cortex-A76 cores (r0p0 to r3p0), if a virtual address
for a cacheable mapping of a location is being accessed by a core while
another core is remapping the virtual address to a new physical page
using the recommended break-before-make sequence, then under very rare
circumstances TLBI+DSB completes before a read using the translation
being invalidated has been observed by other observers. The workaround
repeats the TLBI+DSB operation and is shared with the Qualcomm Falkor
erratum 1009

Reviewed-by: Suzuki K Poulose 
Signed-off-by: Catalin Marinas

arm64: sysreg: fix sparse warnings

2018-11-23T17:33:27+00:00

Specify correct type for the constants to avoid
the following sparse complaints:

./arch/arm64/include/asm/sysreg.h:471:42: warning: constant 0xffffffffffffffff is so big it is unsigned long
./arch/arm64/include/asm/sysreg.h:512:42: warning: constant 0xffffffffffffffff is so big it is unsigned long

Acked-by: Will Deacon 
Acked-by: Olof Johansson 
Acked-by: Luc Van Oostenryck 
Signed-off-by: Sergey Matyukevich 
Signed-off-by: Catalin Marinas

arm64: mm: define NET_IP_ALIGN to 0

2018-11-08T17:50:26+00:00

On arm64, there is no need to add 2 bytes of padding to the start of
each network buffer just to make the IP header appear 32-bit aligned.

Since this might actually adversely affect DMA performance some
platforms, let's override NET_IP_ALIGN to 0 to get rid of this
padding.

Acked-by: Ilias Apalodimas 
Tested-by: Ilias Apalodimas 
Acked-by: Mark Rutland 
Acked-by: Will Deacon 
Signed-off-by: Ard Biesheuvel 
Signed-off-by: Catalin Marinas

Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

2018-11-01T16:27:57+00:00

Pull percpu fixes from Dennis Zhou:
 "Two small things for v4.20.

  The first fixes a clang uninitialized variable warning for arm64 in
  the default path calls BUILD_BUG(). The second removes an unnecessary
  unlikely() in a WARN_ON() use"

* 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  arm64: percpu: Initialize ret in the default case
  mm: percpu: remove unnecessary unlikely()

treewide: remove current_text_addr

2018-10-31T15:54:12+00:00

Prefer _THIS_IP_ defined in linux/kernel.h.

Most definitions of current_text_addr were the same as _THIS_IP_, but
a few archs had inline assembly instead.

This patch removes the final call site of current_text_addr, making all
of the definitions dead code.

[akpm@linux-foundation.org: fix arch/csky/include/asm/processor.h]
Link: http://lkml.kernel.org/r/20180911182413.180715-1-ndesaulniers@google.com
Signed-off-by: Nick Desaulniers 
Cc: Peter Zijlstra 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'akpm' (patches from Andrew)

2018-10-27T02:33:41+00:00

Merge updates from Andrew Morton:

 - a few misc things

 - ocfs2 updates

 - most of MM

* emailed patches from Andrew Morton : (132 commits)
  hugetlbfs: dirty pages as they are added to pagecache
  mm: export add_swap_extent()
  mm: split SWP_FILE into SWP_ACTIVATED and SWP_FS
  tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE
  mm: thp: relocate flush_cache_range() in migrate_misplaced_transhuge_page()
  mm: thp: fix mmu_notifier in migrate_misplaced_transhuge_page()
  mm: thp: fix MADV_DONTNEED vs migrate_misplaced_transhuge_page race condition
  mm/kasan/quarantine.c: make quarantine_lock a raw_spinlock_t
  mm/gup: cache dev_pagemap while pinning pages
  Revert "x86/e820: put !E820_TYPE_RAM regions into memblock.reserved"
  mm: return zero_resv_unavail optimization
  mm: zero remaining unavailable struct pages
  tools/testing/selftests/vm/gup_benchmark.c: add MAP_HUGETLB option
  tools/testing/selftests/vm/gup_benchmark.c: add MAP_SHARED option
  tools/testing/selftests/vm/gup_benchmark.c: allow user specified file
  tools/testing/selftests/vm/gup_benchmark.c: fix 'write' flag usage
  mm/gup_benchmark.c: add additional pinning methods
  mm/gup_benchmark.c: time put_page()
  mm: don't raise MEMCG_OOM event due to failed high-order allocation
  mm/page-writeback.c: fix range_cyclic writeback vs writepages deadlock
  ...

hugetlb: introduce generic version of huge_ptep_get

2018-10-26T23:26:34+00:00

ia64, mips, parisc, powerpc, sh, sparc, x86 architectures use the same
version of huge_ptep_get, so move this generic implementation into
asm-generic/hugetlb.h.

[arnd@arndb.de: fix ARM 3level page tables]
  Link: http://lkml.kernel.org/r/20181005161722.904274-1-arnd@arndb.de
Link: http://lkml.kernel.org/r/20180920060358.16606-12-alex@ghiti.fr
Signed-off-by: Alexandre Ghiti 
Reviewed-by: Luiz Capitulino 
Reviewed-by: Mike Kravetz 
Tested-by: Helge Deller 			[parisc]
Acked-by: Catalin Marinas 	[arm64]
Acked-by: Paul Burton 		[MIPS]
Acked-by: Ingo Molnar 		[x86]
Cc: Arnd Bergmann 
Cc: Benjamin Herrenschmidt 
Cc: David S. Miller 
Cc: Fenghua Yu 
Cc: Heiko Carstens 
Cc: H. Peter Anvin 
Cc: Ingo Molnar 
Cc: James E.J. Bottomley 
Cc: James Hogan 
Cc: Martin Schwidefsky 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Ralf Baechle 
Cc: Rich Felker 
Cc: Russell King 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hugetlb: introduce generic version of huge_ptep_set_access_flags()

2018-10-26T23:26:34+00:00

arm, ia64, sh, x86 architectures use the same version
of huge_ptep_set_access_flags, so move this generic implementation
into asm-generic/hugetlb.h.

Link: http://lkml.kernel.org/r/20180920060358.16606-11-alex@ghiti.fr
Signed-off-by: Alexandre Ghiti 
Reviewed-by: Luiz Capitulino 
Reviewed-by: Mike Kravetz 
Tested-by: Helge Deller 			[parisc]
Acked-by: Catalin Marinas 	[arm64]
Acked-by: Paul Burton 		[MIPS]
Acked-by: Ingo Molnar 		[x86]
Cc: Arnd Bergmann 
Cc: Benjamin Herrenschmidt 
Cc: David S. Miller 
Cc: Fenghua Yu 
Cc: Heiko Carstens 
Cc: H. Peter Anvin 
Cc: Ingo Molnar 
Cc: James E.J. Bottomley 
Cc: James Hogan 
Cc: Martin Schwidefsky 
Cc: Michael Ellerman 
Cc: Paul Mackerras 
Cc: Ralf Baechle 
Cc: Rich Felker 
Cc: Russell King 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds