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CONFIG_SPARSE_RCU_POINTER: RCU debugging: sparse-based checks for pointer usage

General informations

The Linux kernel configuration item CONFIG_SPARSE_RCU_POINTER:

• prompt: RCU debugging: sparse-based checks for pointer usage
• type: bool
• depends on: (none)
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.37–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

This feature enables the __rcu sparse annotation for RCU-protected pointers. This annotation will cause sparse to flag any non-RCU used of annotated pointers. This can be helpful when debugging RCU usage. Please note that this feature is not intended to enforce code cleanliness; it is instead merely a debugging aid.

Say Y to make sparse flag questionable use of RCU-protected pointers

Say N if you are unsure.

Hardware

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