CONFIG_RISCV_QUEUED_SPINLOCKS: Using queued spinlock

General informations

The Linux kernel configuration item CONFIG_RISCV_QUEUED_SPINLOCKS:

• prompt: Using queued spinlock
• type: bool
• depends on: CONFIG_SMP && CONFIG_MMU && CONFIG_NONPORTABLE
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.13-rc+HEAD

Help text

The queued spinlock implementation requires the forward progress guarantee of cmpxchg()/xchg() atomic operations: CAS with Zabha or LR/SC with Ziccrse provide such guarantee.

Select this if and only if Zabha or Ziccrse is available on your platform, RISCV_QUEUED_SPINLOCKS must not be selected for platforms without one of those extensions.

If unsure, select RISCV_COMBO_SPINLOCKS, which will use qspinlocks when supported and otherwise ticket spinlocks.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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