diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 1 | ||||
| -rw-r--r-- | init/calibrate.c | 15 | ||||
| -rw-r--r-- | init/main.c | 5 |
3 files changed, 15 insertions, 6 deletions
diff --git a/init/Kconfig b/init/Kconfig index a075765d5fbe..018d206c21f7 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -713,7 +713,6 @@ config CGROUP_PERF menuconfig CGROUP_SCHED bool "Group CPU scheduler" - depends on EXPERIMENTAL default n help This feature lets CPU scheduler recognize task groups and control CPU 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 " diff --git a/init/main.c b/init/main.c index 2c76efb513c2..415548e808d2 100644 --- a/init/main.c +++ b/init/main.c @@ -282,10 +282,6 @@ static int __init unknown_bootoption(char *param, char *val) return 0; } -#ifdef CONFIG_DEBUG_PAGEALLOC -int __read_mostly debug_pagealloc_enabled = 0; -#endif - static int __init init_setup(char *str) { unsigned int i; @@ -596,7 +592,6 @@ asmlinkage void __init start_kernel(void) } #endif page_cgroup_init(); - enable_debug_pagealloc(); debug_objects_mem_init(); kmemleak_init(); setup_per_cpu_pageset(); |