[PATCH v2] Add static_key_feature_checks_initialized flag

[Michael Ellerman]

On Mon, 08 Apr 2024 05:23:58 +0000, Nicholas Miehlbradt wrote:
> JUMP_LABEL_FEATURE_CHECK_DEBUG used static_key_intialized to determine
> whether {cpu,mmu}_has_feature() is used before static keys were
> initialized. However, {cpu,mmu}_has_feature() should not be used before
> setup_feature_keys() is called but static_key_initialized is set well
> before this by the call to jump_label_init() in early_init_devtree().
> This creates a window in which JUMP_LABEL_FEATURE_CHECK_DEBUG will not
> detect misuse and report errors. Add a flag specifically to indicate
> when {cpu,mmu}_has_feature() is safe to use.
> 
> [...]

Applied to powerpc/next.

[1/1] Add static_key_feature_checks_initialized flag
      https://git.kernel.org/powerpc/c/676b2f99b0f6cd11193eeae13c976565c3fc7545

cheers