Commit-ID: eb496063c9904ce682253ee445b9acb9b6257581
Gitweb: http://git.kernel.org/tip/eb496063c9904ce682253ee445b9acb9b6257581
Author: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
AuthorDate: Fri, 14 Jul 2017 11:34:06 +0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 25 Sep 2017 15:22:44 +0200
x86/timers: Move the simple udelay calibration to tsc.h
Commit dd759d93f4dd ("x86/timers: Add simple udelay calibration") adds
an static function in x86 boot-time initializations.
But, this function is actually related to TSC, so it should be maintained
in tsc.c, not in setup.c.
Move simple_udelay_calibration() from setup.c to tsc.c and rename it to
tsc_early_delay_calibrate for more readability.
Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1500003247-17368-1-git-send-email-douly.fnst@xxxxxxxxxxxxxx
---
arch/x86/include/asm/tsc.h | 1 +
arch/x86/kernel/setup.c | 22 +---------------------
arch/x86/kernel/tsc.c | 19 +++++++++++++++++++
3 files changed, 21 insertions(+), 21 deletions(-)
diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h
index f5e6f1c..d0509c7 100644
--- a/arch/x86/include/asm/tsc.h
+++ b/arch/x86/include/asm/tsc.h
@@ -31,6 +31,7 @@ static inline cycles_t get_cycles(void)
extern struct system_counterval_t convert_art_to_tsc(u64 art);
+extern void tsc_early_delay_calibrate(void);
extern void tsc_init(void);
extern void mark_tsc_unstable(char *reason);
extern int unsynchronized_tsc(void);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0957dd7..c63d2b4 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -822,26 +822,6 @@ dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
return 0;
}
-static void __init simple_udelay_calibration(void)
-{
- unsigned int tsc_khz, cpu_khz;
- unsigned long lpj;
-
- if (!boot_cpu_has(X86_FEATURE_TSC))
- return;
-
- cpu_khz = x86_platform.calibrate_cpu();
- tsc_khz = x86_platform.calibrate_tsc();
-
- tsc_khz = tsc_khz ? : cpu_khz;
- if (!tsc_khz)
- return;
-
- lpj = tsc_khz * 1000;
- do_div(lpj, HZ);
- loops_per_jiffy = lpj;
-}
-
/*
* Determine if we were loaded by an EFI loader. If so, then we have also been
* passed the efi memmap, systab, etc., so we should use these data structures
@@ -1049,7 +1029,7 @@ void __init setup_arch(char **cmdline_p)
*/
init_hypervisor_platform();
- simple_udelay_calibration();
+ tsc_early_delay_calibrate();
x86_init.resources.probe_roms();
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 796d96b..c173dce 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -1263,6 +1263,25 @@ static int __init init_tsc_clocksource(void)
*/
device_initcall(init_tsc_clocksource);
+void __init tsc_early_delay_calibrate(void)
+{
+ unsigned long lpj;
+
+ if (!boot_cpu_has(X86_FEATURE_TSC))
+ return;
+
+ cpu_khz = x86_platform.calibrate_cpu();
+ tsc_khz = x86_platform.calibrate_tsc();
+
+ tsc_khz = tsc_khz ? : cpu_khz;
+ if (!tsc_khz)
+ return;
+
+ lpj = tsc_khz * 1000;
+ do_div(lpj, HZ);
+ loops_per_jiffy = lpj;
+}
+
void __init tsc_init(void)
{
u64 lpj, cyc;
--
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