linux-kernel - [PATCH v5 1/5] x86: stub out pmc function

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Message-Id: <20170708000303.21863-1-dbasehore@chromium.org>
Date:   Fri,  7 Jul 2017 17:02:59 -0700
From:   Derek Basehore <dbasehore@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Rajneesh Bhardwaj <rajneesh.bhardwaj@...el.com>,
        x86@...nel.org, platform-driver-x86@...r.kernel.org,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, linux-pm@...r.kernel.org,
        Derek Basehore <dbasehore@...omium.org>
Subject: [PATCH v5 1/5] x86: stub out pmc function

This creates an inline function of intel_pmc_slp_s0_counter_read for
!CONFIG_INTEL_PMC_CORE.

Signed-off-by: Derek Basehore <dbasehore@...omium.org>
---
 arch/x86/include/asm/pmc_core.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/pmc_core.h b/arch/x86/include/asm/pmc_core.h
index d4855f11136d..5d142d915f30 100644
--- a/arch/x86/include/asm/pmc_core.h
+++ b/arch/x86/include/asm/pmc_core.h
@@ -22,6 +22,10 @@
 #define _ASM_PMC_CORE_H
 
 /* API to read SLP_S0_RESIDENCY counter */
-int intel_pmc_slp_s0_counter_read(u32 *data);
+#ifdef CONFIG_INTEL_PMC_CORE
+extern int intel_pmc_slp_s0_counter_read(u32 *data);
+#else
+static inline int intel_pmc_slp_s0_counter_read(u32 *data) { return -EPERM; }
+#endif
 
 #endif /* _ASM_PMC_CORE_H */
-- 
2.13.2.725.g09c95d1e9-goog