linux-kernel - [PATCH 2/3] ACPI / PPTT: fix build when CONFIG_ACPI

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Date:   Tue,  5 Jun 2018 14:55:37 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     linux-acpi@...r.kernel.org,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Catalin Marinas <catalin.marinas@....com>,
        Jeremy Linton <jeremy.linton@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Hanjun Guo <hanjun.guo@...aro.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH 2/3] ACPI / PPTT: fix build when CONFIG_ACPI_PPTT is not enabled

Though CONFIG_ACPI_PPTT is selected by platforms and nor user visible,
it may be useful to support the build with CONFIG_ACPI_PPTT disabled.

This patch adds the missing dummy/boiler plate implementation to fix
the build.

Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 include/linux/acpi.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Hi Rafael,

If you are fine with this, can you provide Ack, so that we route this
through ARM64 tree where most of the ACPI PPTT support is present.

Regards,
Sudeep

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 8f2cdb0eca71..0fa28265d095 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1299,8 +1299,28 @@ static inline int lpit_read_residency_count_address(u64 *address)
 }
 #endif
 
+#ifdef CONFIG_ACPI_PPTT
 int find_acpi_cpu_topology(unsigned int cpu, int level);
 int find_acpi_cpu_topology_package(unsigned int cpu);
 int find_acpi_cpu_cache_topology(unsigned int cpu, int level);
+int acpi_find_last_cache_level(unsigned int cpu);
+#else
+static inline int find_acpi_cpu_topology(unsigned int cpu, int level)
+{
+	return -EINVAL;
+}
+static inline int find_acpi_cpu_topology_package(unsigned int cpu)
+{
+	return -EINVAL;
+}
+static inline int find_acpi_cpu_cache_topology(unsigned int cpu, int level)
+{
+	return -EINVAL;
+}
+static inline int acpi_find_last_cache_level(unsigned int cpu)
+{
+	return -EINVAL;
+}
+#endif
 
 #endif	/*_LINUX_ACPI_H*/
-- 
2.7.4