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| author | Tony Luck <tony.luck@intel.com> | 2006-02-07 15:25:57 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-02-07 15:25:57 -0800 |
| commit | d6e56a2a088935f3c1feee5ff5a06c67f2ec6002 (patch) | |
| tree | ab9fd17a56f81a7662aab8f135be7ed0f3c707c5 /arch/ia64/kernel/head.S | |
| parent | 9d78f43d1fd3e028bfd37510ce847d0896f71f78 (diff) | |
| download | op-kernel-dev-d6e56a2a088935f3c1feee5ff5a06c67f2ec6002.zip op-kernel-dev-d6e56a2a088935f3c1feee5ff5a06c67f2ec6002.tar.gz | |
[IA64] Fix CONFIG_PRINTK_TIME
There were two problems with enabling the PRINTK_TIME config
option:
1) The first calls to printk() occur before per-cpu data virtual
address is pinned into the TLB, so sched_clock() can fault.
2) sched_clock() is based on ar.itc, which may not be synchronized
across cpus.
Ken Chen started this patch, Tony Luck tinkered with it, and Jes
Sorensen perfected it.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/head.S')
| -rw-r--r-- | arch/ia64/kernel/head.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S index fbc7ea3..f1778a8 100644 --- a/arch/ia64/kernel/head.S +++ b/arch/ia64/kernel/head.S @@ -352,6 +352,7 @@ start_ap: mov ar.rsc=0 // place RSE in enforced lazy mode ;; loadrs // clear the dirty partition + mov IA64_KR(PER_CPU_DATA)=r0 // clear physical per-CPU base ;; mov ar.bspstore=r2 // establish the new RSE stack ;; |
