diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2012-02-06 16:11:09 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-02-06 16:12:16 +0100 |
| commit | d4730ace0c7dbb64513e35b6fc5fd7e7f381e490 (patch) | |
| tree | 18890c096cdd869a593c56de3257faa40af8e050 /init/calibrate.c | |
| parent | HID: hyperv: Properly disconnect the input device (diff) | |
| parent | Merge tag 'pm-fixes-for-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | linux-d4730ace0c7dbb64513e35b6fc5fd7e7f381e490.tar.xz linux-d4730ace0c7dbb64513e35b6fc5fd7e7f381e490.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into upstream-fixes
Sync with Linus' tree. This is necessary to have a base for
patch that fixes commit 35b4c01e29b ("power_supply: add "powers"
links to self-powered HID devices") which went in through Anton's
tree.
Diffstat (limited to 'init/calibrate.c')
| -rw-r--r-- | init/calibrate.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/init/calibrate.c b/init/calibrate.c index 24df7976816c..5f117ca9e069 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -246,6 +246,19 @@ recalibrate: static DEFINE_PER_CPU(unsigned long, cpu_loops_per_jiffy) = { 0 }; +/* + * Check if cpu calibration delay is already known. For example, + * some processors with multi-core sockets may have all cores + * with the same calibration delay. + * + * Architectures should override this function if a faster calibration + * method is available. + */ +unsigned long __attribute__((weak)) __cpuinit calibrate_delay_is_known(void) +{ + return 0; +} + void __cpuinit calibrate_delay(void) { unsigned long lpj; @@ -265,6 +278,8 @@ void __cpuinit calibrate_delay(void) lpj = lpj_fine; pr_info("Calibrating delay loop (skipped), " "value calculated using timer frequency.. "); + } else if ((lpj = calibrate_delay_is_known())) { + ; } else if ((lpj = calibrate_delay_direct()) != 0) { if (!printed) pr_info("Calibrating delay using timer " |