diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 23 | ||||
| -rw-r--r-- | init/calibrate.c | 24 | ||||
| -rw-r--r-- | init/main.c | 11 |
3 files changed, 40 insertions, 18 deletions
diff --git a/init/Kconfig b/init/Kconfig index 9e03ef8b311..54c655ce9c0 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -334,6 +334,15 @@ config TREE_PREEMPT_RCU is also required. It also scales down nicely to smaller systems. +config TINY_RCU + bool "UP-only small-memory-footprint RCU" + depends on !SMP + help + This option selects the RCU implementation that is + designed for UP systems from which real-time response + is not required. This option greatly reduces the + memory footprint of RCU. + endchoice config RCU_TRACE @@ -606,7 +615,7 @@ config SYSFS_DEPRECATED bool config SYSFS_DEPRECATED_V2 - bool "remove sysfs features which may confuse old userspace tools" + bool "enable deprecated sysfs features to support old userspace tools" depends on SYSFS default n select SYSFS_DEPRECATED @@ -754,6 +763,7 @@ config UID16 config SYSCTL_SYSCALL bool "Sysctl syscall support" if EMBEDDED + depends on PROC_SYSCTL default y select SYSCTL ---help--- @@ -1098,6 +1108,16 @@ config SLOW_WORK See Documentation/slow-work.txt. +config SLOW_WORK_DEBUG + bool "Slow work debugging through debugfs" + default n + depends on SLOW_WORK && DEBUG_FS + help + Display the contents of the slow work run queue through debugfs, + including items currently executing. + + See Documentation/slow-work.txt. + endmenu # General setup config HAVE_GENERIC_DMA_COHERENT @@ -1210,3 +1230,4 @@ source "block/Kconfig" config PREEMPT_NOTIFIERS bool +source "kernel/Kconfig.locks" diff --git a/init/calibrate.c b/init/calibrate.c index a379c906119..6eb48e53d61 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -123,23 +123,26 @@ void __cpuinit calibrate_delay(void) { unsigned long ticks, loopbit; int lps_precision = LPS_PREC; + static bool printed; if (preset_lpj) { loops_per_jiffy = preset_lpj; - printk(KERN_INFO - "Calibrating delay loop (skipped) preset value.. "); - } else if ((smp_processor_id() == 0) && lpj_fine) { + if (!printed) + pr_info("Calibrating delay loop (skipped) " + "preset value.. "); + } else if ((!printed) && lpj_fine) { loops_per_jiffy = lpj_fine; - printk(KERN_INFO - "Calibrating delay loop (skipped), " + pr_info("Calibrating delay loop (skipped), " "value calculated using timer frequency.. "); } else if ((loops_per_jiffy = calibrate_delay_direct()) != 0) { - printk(KERN_INFO - "Calibrating delay using timer specific routine.. "); + if (!printed) + pr_info("Calibrating delay using timer " + "specific routine.. "); } else { loops_per_jiffy = (1<<12); - printk(KERN_INFO "Calibrating delay loop... "); + if (!printed) + pr_info("Calibrating delay loop... "); while ((loops_per_jiffy <<= 1) != 0) { /* wait for "start of" clock tick */ ticks = jiffies; @@ -170,7 +173,10 @@ void __cpuinit calibrate_delay(void) loops_per_jiffy &= ~loopbit; } } - printk(KERN_CONT "%lu.%02lu BogoMIPS (lpj=%lu)\n", + if (!printed) + pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n", loops_per_jiffy/(500000/HZ), (loops_per_jiffy/(5000/HZ)) % 100, loops_per_jiffy); + + printed = true; } diff --git a/init/main.c b/init/main.c index 5988debfc50..4051d75dd2d 100644 --- a/init/main.c +++ b/init/main.c @@ -251,7 +251,7 @@ early_param("loglevel", loglevel); /* * Unknown boot options get handed to init, unless they look like - * failed parameters + * unused parameters (modprobe will find them in /proc/cmdline). */ static int __init unknown_bootoption(char *param, char *val) { @@ -272,14 +272,9 @@ static int __init unknown_bootoption(char *param, char *val) if (obsolete_checksetup(param)) return 0; - /* - * Preemptive maintenance for "why didn't my misspelled command - * line work?" - */ - if (strchr(param, '.') && (!val || strchr(param, '.') < val)) { - printk(KERN_ERR "Unknown boot option `%s': ignoring\n", param); + /* Unused module parameter. */ + if (strchr(param, '.') && (!val || strchr(param, '.') < val)) return 0; - } if (panic_later) return 0; |