Commit 38d16667 authored by Mark Brown's avatar Mark Brown Committed by Will Deacon
Browse files

arm64: Clarify when cpu_enable() is called 



Strengthen the wording in the documentation for cpu_enable() to make it
more obvious to readers not already familiar with the code when the core
will call this callback and that this is intentional.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
[will: minor tweak to emphasis in the comment]
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 37143dcc

arch/arm64/include/asm/cpufeature.h

+10 −3
Original line number Diff line number Diff line
@@ -289,9 +289,16 @@ struct arm64_cpu_capabilities { 
	u16 type;

	bool (*matches)(const struct arm64_cpu_capabilities *caps, int scope);

	/*

	 * Take the appropriate actions to enable this capability for this CPU.

	 * For each successfully booted CPU, this method is called for each

	 * globally detected capability.

	 * Take the appropriate actions to configure this capability

	 * for this CPU. If the capability is detected by the kernel

	 * this will be called on all the CPUs in the system,

	 * including the hotplugged CPUs, regardless of whether the

	 * capability is available on that specific CPU. This is

	 * useful for some capabilities (e.g, working around CPU

	 * errata), where all the CPUs must take some action (e.g,

	 * changing system control/configuration). Thus, if an action

	 * is required only if the CPU has the capability, then the

	 * routine must check it before taking any action.

	 */

	void (*cpu_enable)(const struct arm64_cpu_capabilities *cap);

	union {

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