mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
x86/tsc: Use TSC as sched clock early
All prerequesites for enabling TSC as sched clock early in the boot process are available now: - Early attempt of TSC calibration - Early availablity of static branch patching If TSC frequency can be established in the early calibration, enable the static key which switches sched clock to use TSC. [ tglx: Massaged changelog ] Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: steven.sistare@oracle.com Cc: daniel.m.jordan@oracle.com Cc: linux@armlinux.org.uk Cc: schwidefsky@de.ibm.com Cc: heiko.carstens@de.ibm.com Cc: john.stultz@linaro.org Cc: sboyd@codeaurora.org Cc: hpa@zytor.com Cc: douly.fnst@cn.fujitsu.com Cc: peterz@infradead.org Cc: prarit@redhat.com Cc: feng.tang@intel.com Cc: pmladek@suse.com Cc: gnomes@lxorguk.ukuu.org.uk Cc: linux-s390@vger.kernel.org Cc: boris.ostrovsky@oracle.com Cc: jgross@suse.com Cc: pbonzini@redhat.com Link: https://lkml.kernel.org/r/20180719205545.16512-22-pasha.tatashin@oracle.com
This commit is contained in:
parent
e2a9ca29b5
commit
4763f03d3d
@ -1408,6 +1408,7 @@ void __init tsc_early_init(void)
|
||||
/* Sanitize TSC ADJUST before cyc2ns gets initialized */
|
||||
tsc_store_and_check_tsc_adjust(true);
|
||||
cyc2ns_init_boot_cpu();
|
||||
static_branch_enable(&__use_tsc);
|
||||
}
|
||||
|
||||
void __init tsc_init(void)
|
||||
|
Loading…
Reference in New Issue
Block a user