init: discoverable root partitions, a.k.a. an omittable "root=" cmdline option#968

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Commits on Jun 15, 2026

init: add DPS root partition type UUID capability

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alpha: define DPS root partition type UUID

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arc: define DPS root partition type UUID

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arm: define DPS root partition type UUID

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arm64: define DPS root partition type UUID

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loongarch: define DPS root partition type UUID

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mips: define DPS root partition type UUIDs

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parisc: define DPS root partition type UUID

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powerpc: define DPS root partition type UUIDs

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riscv: define DPS root partition type UUIDs

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s390: define DPS root partition type UUIDs

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x86: define DPS root partition type UUIDs

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block: store GPT partition type UUID

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block: add early_lookup_bdev_by_type_uuid()

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block: store GPT attributes as a raw value

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block: don't discover partition with DPS no-auto GPT attribute

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init: factor out root device lookup into lookup_root_device()

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init: discover root by DPS partition type UUID

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docs: document discoverable root partitions

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init: discoverable root partitions, a.k.a. an omittable "root=" cmdline option#968

init: discoverable root partitions, a.k.a. an omittable "root=" cmdline option#968
blktests-ci[bot] wants to merge 19 commits into
linus-master_basefrom
series/1111812=>linus-master

Commits on Jun 15, 2026

init: add DPS root partition type UUID capability

alpha: define DPS root partition type UUID

arc: define DPS root partition type UUID

arm: define DPS root partition type UUID

arm64: define DPS root partition type UUID

loongarch: define DPS root partition type UUID

mips: define DPS root partition type UUIDs

parisc: define DPS root partition type UUID

powerpc: define DPS root partition type UUIDs

riscv: define DPS root partition type UUIDs

s390: define DPS root partition type UUIDs

x86: define DPS root partition type UUIDs

block: store GPT partition type UUID

block: add early_lookup_bdev_by_type_uuid()

block: store GPT attributes as a raw value

block: don't discover partition with DPS no-auto GPT attribute

init: factor out root device lookup into lookup_root_device()

init: discover root by DPS partition type UUID

docs: document discoverable root partitions