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From: Feng Tang <feng.tang@intel.com>
To: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org
Cc: Clemens Ladisch <clemens@ladisch.de>,
	John Stultz <john.stultz@linaro.org>,
	Feng Tang <feng.tang@intel.com>
Subject: [PATCH 1/2] x86, hpet: Make boot_hpet_disable extern
Date: Thu, 24 Apr 2014 16:18:17 +0800
Message-ID: <1398327498-13163-1-git-send-email-feng.tang@intel.com> (raw)

HPET on some platform has accuracy problem. Making
"boot_hpet_disable" extern so that we can runtime disable
the HPET timer by using quirk to check the platform.

Signed-off-by: Feng Tang <feng.tang@intel.com>
---
 arch/x86/include/asm/hpet.h |    1 +
 arch/x86/kernel/hpet.c      |    2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h
index b18df57..36f7125 100644
--- a/arch/x86/include/asm/hpet.h
+++ b/arch/x86/include/asm/hpet.h
@@ -63,6 +63,7 @@
 /* hpet memory map physical address */
 extern unsigned long hpet_address;
 extern unsigned long force_hpet_address;
+extern int boot_hpet_disable;
 extern u8 hpet_blockid;
 extern int hpet_force_user;
 extern u8 hpet_msi_disable;
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 8d80ae0..4177bfb 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -88,7 +88,7 @@ static inline void hpet_clear_mapping(void)
 /*
  * HPET command line enable / disable
  */
-static int boot_hpet_disable;
+int boot_hpet_disable;
 int hpet_force_user;
 static int hpet_verbose;
 
-- 
1.7.9.5


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-04-24  8:18 Feng Tang [this message]
2014-04-24  8:18 ` [PATCH 2/2] x86: Add quirk to disable HPET for baytrail platform Feng Tang
2014-05-08 10:45   ` [tip:x86/urgent] x86/intel: Add quirk to disable HPET for the Baytrail platform tip-bot for Feng Tang
2014-05-08  6:28 ` [PATCH 1/2] x86, hpet: Make boot_hpet_disable extern Feng Tang
2014-05-08  6:32   ` Ingo Molnar
2014-05-08 10:45 ` [tip:x86/urgent] x86/hpet: " tip-bot for Feng Tang

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