diff options
| author | Dou Liyang <douly.fnst@cn.fujitsu.com> | 2017-07-14 11:34:06 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-09-25 15:22:44 +0200 |
| commit | eb496063c9904ce682253ee445b9acb9b6257581 (patch) | |
| tree | 7a9326a2c5a6f14afcf613fba6d7ec26c4ff3d30 /arch | |
| parent | e19b205be43d11bff638cad4487008c48d21c103 (diff) | |
| download | linux-eb496063c9904ce682253ee445b9acb9b6257581.tar.gz | |
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@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1500003247-17368-1-git-send-email-douly.fnst@cn.fujitsu.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/tsc.h | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 22 | ||||
| -rw-r--r-- | 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 f5e6f1c417df..d0509c75e150 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 0957dd73d127..c63d2b4dd5c8 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 796d96bb0821..c173dcef1f46 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; |