[PATCH ARM64 v4.4 V3 21/44] arm64: cpufeature: Pass capability structure to ->enable callback

[Viresh Kumar <viresh.kumar@linaro.org>]

From: Will Deacon <will.deacon@arm.com>

commit 0a0d111d40fd1dc588cc590fab6b55d86ddc71d3 upstream.

In order to invoke the CPU capability ->matches callback from the ->enable
callback for applying local-CPU workarounds, we need a handle on the
capability structure.

This patch passes a pointer to the capability structure to the ->enable
callback.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[ v4.4: Use &caps[i] instead as caps isn't incremented ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 arch/arm64/kernel/cpufeature.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index c74df3ca000e..474b34243521 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -832,7 +832,7 @@ void enable_cpu_capabilities(const struct arm64_cpu_capabilities *caps)
 			 * uses an IPI, giving us a PSTATE that disappears when
 			 * we return.
 			 */
-			stop_machine(caps[i].enable, NULL, cpu_online_mask);
+			stop_machine(caps[i].enable, (void *)&caps[i], cpu_online_mask);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -881,7 +881,7 @@ static void verify_local_cpu_capabilities(void)
 			cpu_die_early();
 		}
 		if (caps[i].enable)
-			caps[i].enable(NULL);
+			caps[i].enable((void *)&caps[i]);
 	}
 
 	for (i = 0, caps = arm64_hwcaps; caps[i].matches; i++) {
-- 
2.21.0.rc0.269.g1a574e7a288b