lwn.git/arch/arm/include/asm/pgtable-nommu.h, branch docs-5.6

mm: consolidate pgtable_cache_init() and pgd_cache_init()

2019-09-24T22:54:09+00:00

Both pgtable_cache_init() and pgd_cache_init() are used to initialize kmem cache for page table allocations on several architectures that do not use PAGE_SIZE tables for one or more levels of the page table hierarchy. Most architectures do not implement these functions and use __weak default NOP implementation of pgd_cache_init(). Since there is no such default for pgtable_cache_init(), its empty stub is duplicated among most architectures. Rename the definitions of pgd_cache_init() to pgtable_cache_init() and drop empty stubs of pgtable_cache_init(). Link: http://lkml.kernel.org/r/1566457046-22637-1-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport Acked-by: Will Deacon [arm64] Acked-by: Thomas Gleixner [x86] Cc: Catalin Marinas Cc: Ingo Molnar Cc: Borislav Petkov Cc: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

arm-nommu: remove the unused pgprot_dmacoherent define

2019-08-26T07:13:18+00:00

Signed-off-by: Christoph Hellwig

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

ARM: 8676/1: NOMMU: provide pgprot_device() macro

2017-06-05T09:29:40+00:00

NOMMU build leads to the following error: CC drivers/pci/mmap.o drivers/pci/mmap.c: In function 'pci_mmap_resource_range': drivers/pci/mmap.c:60:3: error: implicit declaration of function 'pgprot_device' [-Werror=implicit-function-declaration] vma->vm_page_prot = pgprot_device(vma->vm_page_prot); ^ cc1: some warnings being treated as errors scripts/Makefile.build:302: recipe for target 'drivers/pci/mmap.o' failed make[2]: *** [drivers/pci/mmap.o] Error 1 scripts/Makefile.build:561: recipe for target 'drivers/pci' failed make[1]: *** [drivers/pci] Error 2 Makefile:1016: recipe for target 'drivers' failed make: *** [drivers] Error 2 Fix it with support of pgprot_device() macro for NOMMU. Fixes: 00d2904ffeac ("ARM/PCI: Use generic pci_mmap_resource_range()") Signed-off-by: Vladimir Murzin Signed-off-by: Russell King

ARM: 8655/1: improve NOMMU definition of pgprot_*()

2017-02-28T11:06:19+00:00

The tegra DRM driver produces a harmless warning when built for NOMMU: drivers/gpu/drm/tegra/gem.c: In function 'tegra_drm_mmap': drivers/gpu/drm/tegra/gem.c:508:12: unused variable 'prot' This is because pgprot_writecombine() on ARM returns a constant and ignores its argument. The version in asm-generic doesn't have that problem, so let's use that one instead. We don't actually care about the value on NOMMU, and this is consistent with what some other architectures do. Signed-off-by: Arnd Bergmann Acked-by: Thierry Reding Signed-off-by: Russell King

mm: make FIRST_USER_ADDRESS unsigned long on all archs

2015-02-12T01:06:03+00:00

LKP has triggered a compiler warning after my recent patch "mm: account pmd page tables to the process": mm/mmap.c: In function 'exit_mmap': >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default] The code: > 2857 WARN_ON(mm_nr_pmds(mm) > 2858 round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT); In this, on tile, we have FIRST_USER_ADDRESS defined as 0. round_up() has the same type -- int. PUD_SHIFT. I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned long. On every arch for consistency. Signed-off-by: Kirill A. Shutemov Reported-by: Wu Fengguang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

arm: drop L_PTE_FILE and pte_file()-related helpers

2015-02-10T22:30:31+00:00

We've replaced remap_file_pages(2) implementation with emulation. Nobody creates non-linear mapping anymore. This patch also adjust __SWP_TYPE_SHIFT, effectively increase size of possible swap file to 128G. Signed-off-by: Kirill A. Shutemov Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

consolidate io_remap_pfn_range definitions

2013-06-29T08:46:35+00:00

Signed-off-by: Al Viro

Remove remaining bits of io_remap_page_range()

2012-03-23T23:58:31+00:00

Commit 33bf56106d9b ("feature removal of io_remap_page_range()") removed io_remap_page_range(), but it is still included in some arch header files. It has no in-tree users. Signed-off-by: Javi Merino Cc: Russell King Cc: Aurelien Jacquiot Cc: Michal Simek Cc: Jonas Bonn Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ARM: 5988/1: pgprot_dmacoherent() for non-mmu builds

2010-03-13T10:48:22+00:00

Commit 26a26d329688ab018e068b412b03d43d7c299f0a ("dma-mapping: switch ARMv7 DMA mappings to retain 'memory' attribute") added a new macro, pgprot_dmacoherent(), to correctly map DMA memory. The non-mmu pgtable support code also needs to implement this macro, otherwise when compiling you get: CC arch/arm/mm/dma-mapping.o arch/arm/mm/dma-mapping.c: In function 'dma_alloc_coherent': arch/arm/mm/dma-mapping.c:320: error: implicit declaration of function 'pgprot_dmacoherent' arch/arm/mm/dma-mapping.c:320: error: 'pgprot_kernel' undeclared (first use in this function) arch/arm/mm/dma-mapping.c:320: error: (Each undeclared identifier is reported only once arch/arm/mm/dma-mapping.c:320: error: for each function it appears in.) Signed-off-by: Greg Ungerer Signed-off-by: Russell King