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b519508298
The ACPI clocksource takes quite some time to initialize, and this increases the boot time of the kernel for a double digit percentage. This while almost all modern systems will be using the HPET already anyway. This patch turns the clocksource loading into an asynchronous operation; which means it won't hold up the boot while still becoming available normally. To make this work well, an udelay() had to be turned into an usleep_range() so that on UP systems, we yield the CPU to regular boot tasks instead of spinning. CC: John Stultz <johnstul@us.ibm.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Len Brown <lenb@kernel.org> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: John Stultz <john.stultz@linaro.org> |
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| .. | ||
| acpi_pm.c | ||
| clksrc-dbx500-prcmu.c | ||
| cs5535-clockevt.c | ||
| cyclone.c | ||
| dw_apb_timer.c | ||
| i8253.c | ||
| Kconfig | ||
| Makefile | ||
| mmio.c | ||
| scx200_hrt.c | ||
| sh_cmt.c | ||
| sh_mtu2.c | ||
| sh_tmu.c | ||
| tcb_clksrc.c | ||