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-rw-r--r--init/Kconfig13
-rw-r--r--init/calibrate.c24
2 files changed, 27 insertions, 10 deletions
diff --git a/init/Kconfig b/init/Kconfig
index eb4b337..54c655c 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 "enable deprecated 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---
@@ -1220,3 +1230,4 @@ source "block/Kconfig"
config PREEMPT_NOTIFIERS
bool
+source "kernel/Kconfig.locks"
diff --git a/init/calibrate.c b/init/calibrate.c
index a379c90..6eb48e5 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;
}