[PATCH v4 00/15] Fast kernel headers: split linux/mm.h

Max Kellermann
2024-03-12T09:41:49Z

This patch set aims to clean up the linux/mm.h header and reduce
dependencies on it by moving parts out.

The goal was to eliminate dependencies on linux/mm.h from other
popular headers such as highmem.h and dma-mapping.h, and I started by
checking which symbols were really used and moved those declarations
to separate slim headers.

---
v1 -> v2: added more explanations to commit messages; renamed several
new headers from page_*.h to folio_*.h as suggested by Matthew
Wilcox; rebase on linux-next; fix build failures on architectures
um,nios2,hexagon by adding more missing includes
v2 -> v3: rebase on linux-next
v3 -> v4: rebase on linux-next; fix build failure on loongarch64
(reported by kernel test robot); add missing includes to
drivers/dma/bcm2835-dma.c and include/scsi/scsicam.h

Max Kellermann (15):
drivers: add missing includes on linux/mm.h (and others)
include/drm/drm_gem.h: add poll_table_struct forward declaration
include/scsi/scsicam.h: forward-declare struct block_device
linux/mm.h: move page_kasan_tag() to mm/page_kasan_tag.h
linux/mm.h: move section functions to mm/page_section.h
linux/mm.h: move page_address() and others to mm/page_address.h
linux/mm.h: move folio_size(), ... to mm/folio_size.h
linux/mm.h: move folio_next() to mm/folio_next.h
linux/mm.h: move devmap-related declarations to mm/devmap_managed.h
linux/mm.h: move usage count functions to mm/folio_usage.h
linux/mm.h: move page_zone_id() and more to mm/folio_zone.h
linux/mm.h: move pfmemalloc-related functions to pfmemalloc.h
linux/mm.h: move is_vmalloc_addr() to mm/vmalloc_addr.h
linux/mm.h: move high_memory to mm/high_memory.h
include: reduce dependencies on linux/mm.h

MAINTAINERS | 1 +
arch/arm/include/asm/memory.h | 4 +
arch/arm/include/asm/pgtable.h | 2 +
arch/arm/mm/iomap.c | 3 +
arch/csky/include/asm/page.h | 1 +
arch/hexagon/include/asm/mem-layout.h | 4 +
arch/m68k/include/asm/page_mm.h | 1 +
arch/m68k/include/asm/pgtable_mm.h | 1 +
arch/parisc/include/asm/floppy.h | 1 +
arch/powerpc/include/asm/book3s/32/pgtable.h | 4 +
arch/powerpc/include/asm/nohash/32/pgtable.h | 1 +
arch/powerpc/include/asm/page.h | 1 +
arch/x86/include/asm/floppy.h | 1 +
arch/x86/include/asm/pgtable_32_areas.h | 4 +
drivers/comedi/comedi_buf.c | 1 +
.../qat/qat_common/adf_gen4_pm_debugfs.c | 1 +
drivers/dma/bcm2835-dma.c | 1 +
drivers/dma/dma-axi-dmac.c | 1 +
drivers/dma/sh/rcar-dmac.c | 1 +
drivers/firmware/qcom/qcom_scm-legacy.c | 1 +
drivers/firmware/qcom/qcom_scm-smc.c | 1 +
drivers/firmware/raspberrypi.c | 1 +
drivers/iio/buffer/industrialio-buffer-dma.c | 1 +
drivers/iommu/iommufd/ioas.c | 2 +
drivers/iommu/iommufd/selftest.c | 1 +
drivers/media/platform/mediatek/vpu/mtk_vpu.c | 1 +
drivers/media/platform/ti/omap/omap_voutlib.c | 1 +
drivers/misc/bcm-vk/bcm_vk_dev.c | 1 +
drivers/misc/fastrpc.c | 1 +
drivers/misc/genwqe/card_dev.c | 1 +
drivers/misc/uacce/uacce.c | 1 +
drivers/mtd/nand/onenand/onenand_samsung.c | 1 +
drivers/mtd/spi-nor/core.h | 2 +
drivers/pci/p2pdma.c | 1 +
drivers/pci/pci.c | 1 +
drivers/remoteproc/remoteproc_core.c | 1 +
drivers/soc/qcom/rmtfs_mem.c | 1 +
drivers/spi/spi-aspeed-smc.c | 1 +
drivers/spi/spi-bcm2835.c | 2 +
drivers/spi/spi-intel.c | 1 +
drivers/virtio/virtio_ring.c | 1 +
include/drm/drm_file.h | 1 +
include/linux/bio.h | 2 +
include/linux/dma-mapping.h | 1 +
include/linux/highmem-internal.h | 2 +
include/linux/highmem.h | 4 +-
include/linux/huge_mm.h | 2 +
include/linux/iommu.h | 1 +
include/linux/mm.h | 583 +-----------------
include/linux/mm/devmap_managed.h | 37 ++
include/linux/mm/folio_next.h | 27 +
include/linux/mm/folio_size.h | 150 +++++
include/linux/mm/folio_usage.h | 182 ++++++
include/linux/mm/folio_zone.h | 36 ++
include/linux/mm/high_memory.h | 7 +
include/linux/mm/page_address.h | 71 +++
include/linux/mm/page_kasan_tag.h | 66 ++
include/linux/mm/page_section.h | 23 +
include/linux/mm/pfmemalloc.h | 52 ++
include/linux/mm/vmalloc_addr.h | 33 +
include/linux/nvme-keyring.h | 2 +
include/linux/page-flags.h | 3 +
include/linux/scatterlist.h | 8 +-
include/linux/skbuff.h | 4 +
include/scsi/scsicam.h | 5 +
kernel/dma/ops_helpers.c | 1 +
kernel/dma/remap.c | 1 +
lib/scatterlist.c | 1 +
mm/dmapool.c | 1 +
69 files changed, 789 insertions(+), 576 deletions(-)
create mode 100644 include/linux/mm/devmap_managed.h
create mode 100644 include/linux/mm/folio_next.h
create mode 100644 include/linux/mm/folio_size.h
create mode 100644 include/linux/mm/folio_usage.h
create mode 100644 include/linux/mm/folio_zone.h
create mode 100644 include/linux/mm/high_memory.h
create mode 100644 include/linux/mm/page_address.h
create mode 100644 include/linux/mm/page_kasan_tag.h
create mode 100644 include/linux/mm/page_section.h
create mode 100644 include/linux/mm/pfmemalloc.h
create mode 100644 include/linux/mm/vmalloc_addr.h

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2.39.2