Re: [PATCH 0/8] mm: cleanup usage of <asm/pgalloc.h>

From: Mike Rapoport <rppt@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>,
	Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Christophe Leroy <christophe.leroy@csgroup.eu>,
	Joerg Roedel <joro@8bytes.org>, Max Filippov <jcmvbkbc@gmail.com>,
	Mike Rapoport <rppt@linux.ibm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>,
	Stafford Horne <shorne@gmail.com>,
	Stephen Rothwell <sfr@canb.auug.org.au>,
	Steven Rostedt <rostedt@goodmis.org>,
	linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
	linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org,
	linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org,
	linux-mm@kvack.org, linux-parisc@vger.kernel.orglin
Subject: Re: [PATCH 0/8] mm: cleanup usage of <asm/pgalloc.h>
Date: Thu, 02 Jul 2020 21:46:54 +0000	[thread overview]
Message-ID: <20200702214654.GB2999148@kernel.org> (raw)
In-Reply-To: <20200627143453.31835-1-rppt@kernel.org>

Gentle ping.

On Sat, Jun 27, 2020 at 05:34:45PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
> 
> Hi,
> 
> Most architectures have very similar versions of pXd_alloc_one() and
> pXd_free_one() for intermediate levels of page table. 
> These patches add generic versions of these functions in
> <asm-generic/pgalloc.h> and enable use of the generic functions where
> appropriate.
> 
> In addition, functions declared and defined in <asm/pgalloc.h> headers
> are used mostly by core mm and early mm initialization in arch and there is
> no actual reason to have the <asm/pgalloc.h> included all over the place.
> The first patch in this series removes unneeded includes of <asm/pgalloc.h>
> 
> In the end it didn't work out as neatly as I hoped and moving
> pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require
> unnecessary changes to arches that have custom page table allocations, so
> I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local to
> mm/.
> 
> Joerg Roedel (1):
>   mm: move p?d_alloc_track to separate header file
> 
> Mike Rapoport (7):
>   mm: remove unneeded includes of <asm/pgalloc.h>
>   opeinrisc: switch to generic version of pte allocation
>   xtensa: switch to generic version of pte allocation
>   asm-generic: pgalloc: provide generic pmd_alloc_one() and pmd_free_one()
>   asm-generic: pgalloc: provide generic pud_alloc_one() and pud_free_one()
>   asm-generic: pgalloc: provide generic pgd_free()
>   mm: move lib/ioremap.c to mm/
> 
>  arch/alpha/include/asm/pgalloc.h             | 21 +----
>  arch/alpha/include/asm/tlbflush.h            |  1 -
>  arch/alpha/kernel/core_irongate.c            |  1 -
>  arch/alpha/kernel/core_marvel.c              |  1 -
>  arch/alpha/kernel/core_titan.c               |  1 -
>  arch/alpha/kernel/machvec_impl.h             |  2 -
>  arch/alpha/kernel/smp.c                      |  1 -
>  arch/alpha/mm/numa.c                         |  1 -
>  arch/arc/mm/fault.c                          |  1 -
>  arch/arc/mm/init.c                           |  1 -
>  arch/arm/include/asm/pgalloc.h               | 12 +--
>  arch/arm/include/asm/tlb.h                   |  1 -
>  arch/arm/kernel/machine_kexec.c              |  1 -
>  arch/arm/kernel/smp.c                        |  1 -
>  arch/arm/kernel/suspend.c                    |  1 -
>  arch/arm/mach-omap2/omap-mpuss-lowpower.c    |  1 -
>  arch/arm/mm/hugetlbpage.c                    |  1 -
>  arch/arm/mm/mmu.c                            |  1 +
>  arch/arm64/include/asm/pgalloc.h             | 39 +---------
>  arch/arm64/kernel/smp.c                      |  1 -
>  arch/arm64/mm/hugetlbpage.c                  |  1 -
>  arch/arm64/mm/ioremap.c                      |  1 -
>  arch/arm64/mm/mmu.c                          |  1 +
>  arch/csky/include/asm/pgalloc.h              |  7 +-
>  arch/csky/kernel/smp.c                       |  1 -
>  arch/hexagon/include/asm/pgalloc.h           |  7 +-
>  arch/ia64/include/asm/pgalloc.h              | 24 ------
>  arch/ia64/include/asm/tlb.h                  |  1 -
>  arch/ia64/kernel/process.c                   |  1 -
>  arch/ia64/kernel/smp.c                       |  1 -
>  arch/ia64/kernel/smpboot.c                   |  1 -
>  arch/ia64/mm/contig.c                        |  1 -
>  arch/ia64/mm/discontig.c                     |  1 -
>  arch/ia64/mm/hugetlbpage.c                   |  1 -
>  arch/ia64/mm/tlb.c                           |  1 -
>  arch/m68k/include/asm/mmu_context.h          |  2 +-
>  arch/m68k/include/asm/sun3_pgalloc.h         |  7 +-
>  arch/m68k/kernel/dma.c                       |  2 +-
>  arch/m68k/kernel/traps.c                     |  3 +-
>  arch/m68k/mm/cache.c                         |  2 +-
>  arch/m68k/mm/fault.c                         |  1 -
>  arch/m68k/mm/kmap.c                          |  2 +-
>  arch/m68k/mm/mcfmmu.c                        |  1 +
>  arch/m68k/mm/memory.c                        |  1 -
>  arch/m68k/sun3x/dvma.c                       |  2 +-
>  arch/microblaze/include/asm/pgalloc.h        |  6 --
>  arch/microblaze/include/asm/tlbflush.h       |  1 -
>  arch/microblaze/kernel/process.c             |  1 -
>  arch/microblaze/kernel/signal.c              |  1 -
>  arch/mips/include/asm/pgalloc.h              | 19 +----
>  arch/mips/sgi-ip32/ip32-memory.c             |  1 -
>  arch/nds32/mm/mm-nds32.c                     |  2 +
>  arch/nios2/include/asm/pgalloc.h             |  7 +-
>  arch/openrisc/include/asm/pgalloc.h          | 33 +-------
>  arch/openrisc/include/asm/tlbflush.h         |  1 -
>  arch/openrisc/kernel/or32_ksyms.c            |  1 -
>  arch/parisc/include/asm/mmu_context.h        |  1 -
>  arch/parisc/include/asm/pgalloc.h            | 12 +--
>  arch/parisc/kernel/cache.c                   |  1 -
>  arch/parisc/kernel/pci-dma.c                 |  1 -
>  arch/parisc/kernel/process.c                 |  1 -
>  arch/parisc/kernel/signal.c                  |  1 -
>  arch/parisc/kernel/smp.c                     |  1 -
>  arch/parisc/mm/hugetlbpage.c                 |  1 -
>  arch/parisc/mm/ioremap.c                     |  2 +-
>  arch/powerpc/include/asm/tlb.h               |  1 -
>  arch/powerpc/mm/book3s64/hash_hugetlbpage.c  |  1 -
>  arch/powerpc/mm/book3s64/hash_pgtable.c      |  1 -
>  arch/powerpc/mm/book3s64/hash_tlb.c          |  1 -
>  arch/powerpc/mm/book3s64/radix_hugetlbpage.c |  1 -
>  arch/powerpc/mm/init_32.c                    |  1 -
>  arch/powerpc/mm/kasan/8xx.c                  |  1 -
>  arch/powerpc/mm/kasan/book3s_32.c            |  1 -
>  arch/powerpc/mm/mem.c                        |  1 -
>  arch/powerpc/mm/nohash/40x.c                 |  1 -
>  arch/powerpc/mm/nohash/8xx.c                 |  1 -
>  arch/powerpc/mm/nohash/fsl_booke.c           |  1 -
>  arch/powerpc/mm/nohash/kaslr_booke.c         |  1 -
>  arch/powerpc/mm/pgtable.c                    |  1 -
>  arch/powerpc/mm/pgtable_64.c                 |  1 -
>  arch/powerpc/mm/ptdump/hashpagetable.c       |  2 +-
>  arch/powerpc/mm/ptdump/ptdump.c              |  1 -
>  arch/powerpc/platforms/pseries/cmm.c         |  1 -
>  arch/riscv/include/asm/pgalloc.h             | 18 +----
>  arch/riscv/mm/fault.c                        |  1 -
>  arch/s390/include/asm/tlb.h                  |  1 -
>  arch/s390/include/asm/tlbflush.h             |  1 -
>  arch/s390/kernel/machine_kexec.c             |  1 -
>  arch/s390/kernel/ptrace.c                    |  1 -
>  arch/s390/kvm/diag.c                         |  1 -
>  arch/s390/kvm/priv.c                         |  1 -
>  arch/s390/kvm/pv.c                           |  1 -
>  arch/s390/mm/cmm.c                           |  1 -
>  arch/s390/mm/mmap.c                          |  1 -
>  arch/s390/mm/pgtable.c                       |  1 -
>  arch/sh/include/asm/pgalloc.h                |  4 +
>  arch/sh/kernel/idle.c                        |  1 -
>  arch/sh/kernel/machine_kexec.c               |  1 -
>  arch/sh/mm/cache-sh3.c                       |  1 -
>  arch/sh/mm/cache-sh7705.c                    |  1 -
>  arch/sh/mm/hugetlbpage.c                     |  1 -
>  arch/sh/mm/init.c                            |  1 +
>  arch/sh/mm/ioremap_fixed.c                   |  1 -
>  arch/sh/mm/tlb-sh3.c                         |  1 -
>  arch/sparc/include/asm/ide.h                 |  1 -
>  arch/sparc/include/asm/tlb_64.h              |  1 -
>  arch/sparc/kernel/leon_smp.c                 |  1 -
>  arch/sparc/kernel/process_32.c               |  1 -
>  arch/sparc/kernel/signal_32.c                |  1 -
>  arch/sparc/kernel/smp_32.c                   |  1 -
>  arch/sparc/kernel/smp_64.c                   |  1 +
>  arch/sparc/kernel/sun4m_irq.c                |  1 -
>  arch/sparc/mm/highmem.c                      |  1 -
>  arch/sparc/mm/io-unit.c                      |  1 -
>  arch/sparc/mm/iommu.c                        |  1 -
>  arch/sparc/mm/tlb.c                          |  1 -
>  arch/um/include/asm/pgalloc.h                |  9 +--
>  arch/um/include/asm/pgtable-3level.h         |  3 -
>  arch/um/kernel/mem.c                         | 17 -----
>  arch/x86/ia32/ia32_aout.c                    |  1 -
>  arch/x86/include/asm/mmu_context.h           |  1 -
>  arch/x86/include/asm/pgalloc.h               | 42 +---------
>  arch/x86/kernel/alternative.c                |  1 +
>  arch/x86/kernel/apic/apic.c                  |  1 -
>  arch/x86/kernel/mpparse.c                    |  1 -
>  arch/x86/kernel/traps.c                      |  1 -
>  arch/x86/mm/fault.c                          |  1 -
>  arch/x86/mm/hugetlbpage.c                    |  1 -
>  arch/x86/mm/kaslr.c                          |  1 -
>  arch/x86/mm/pgtable_32.c                     |  1 -
>  arch/x86/mm/pti.c                            |  1 -
>  arch/x86/platform/uv/bios_uv.c               |  1 +
>  arch/xtensa/include/asm/pgalloc.h            | 40 ++++------
>  arch/xtensa/kernel/xtensa_ksyms.c            |  1 -
>  arch/xtensa/mm/cache.c                       |  1 -
>  arch/xtensa/mm/fault.c                       |  1 -
>  drivers/block/xen-blkback/common.h           |  1 -
>  drivers/iommu/ipmmu-vmsa.c                   |  1 -
>  drivers/xen/balloon.c                        |  1 -
>  drivers/xen/privcmd.c                        |  1 -
>  fs/binfmt_elf_fdpic.c                        |  1 -
>  include/asm-generic/pgalloc.h                | 80 ++++++++++++++++++++
>  include/asm-generic/tlb.h                    |  1 -
>  include/linux/mm.h                           | 45 -----------
>  lib/Makefile                                 |  1 -
>  mm/Makefile                                  |  2 +-
>  mm/hugetlb.c                                 |  1 +
>  {lib => mm}/ioremap.c                        |  2 +
>  mm/pgalloc-track.h                           | 51 +++++++++++++
>  mm/sparse.c                                  |  1 -
>  mm/vmalloc.c                                 |  1 +
>  151 files changed, 194 insertions(+), 451 deletions(-)
>  rename {lib => mm}/ioremap.c (99%)
>  create mode 100644 mm/pgalloc-track.h
> 
> -- 
> 2.26.2
> 

-- 
Sincerely yours,
Mike.