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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-29 16:53:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-29 16:53:48 -0700
commit12679a2d7e3bfbdc7586e3e86d1ca90c46659363 (patch)
treed9c00f2e599d1c3e04a349229a6a19906d01f99e /arch/arm/kernel/smp.c
parent1c036588772d01655d851f75dffc27c971e072e2 (diff)
parentb0df89868006517417251e02cc4ce5d4b0165885 (diff)
downloadvexpress-lsk-12679a2d7e3bfbdc7586e3e86d1ca90c46659363.tar.gz
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
Pull more ARM updates from Russell King. This got a fair number of conflicts with the <asm/system.h> split, but also with some other sparse-irq and header file include cleanups. They all looked pretty trivial, though. * 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (59 commits) ARM: fix Kconfig warning for HAVE_BPF_JIT ARM: 7361/1: provide XIP_VIRT_ADDR for no-MMU builds ARM: 7349/1: integrator: convert to sparse irqs ARM: 7259/3: net: JIT compiler for packet filters ARM: 7334/1: add jump label support ARM: 7333/2: jump label: detect %c support for ARM ARM: 7338/1: add support for early console output via semihosting ARM: use set_current_blocked() and block_sigmask() ARM: exec: remove redundant set_fs(USER_DS) ARM: 7332/1: extract out code patch function from kprobes ARM: 7331/1: extract out insn generation code from ftrace ARM: 7330/1: ftrace: use canonical Thumb-2 wide instruction format ARM: 7351/1: ftrace: remove useless memory checks ARM: 7316/1: kexec: EOI active and mask all interrupts in kexec crash path ARM: Versatile Express: add NO_IOPORT ARM: get rid of asm/irq.h in asm/prom.h ARM: 7319/1: Print debug info for SIGBUS in user faults ARM: 7318/1: gic: refactor irq_start assignment ARM: 7317/1: irq: avoid NULL check in for_each_irq_desc loop ARM: 7315/1: perf: add support for the Cortex-A7 PMU ...
Diffstat (limited to 'arch/arm/kernel/smp.c')
-rw-r--r--arch/arm/kernel/smp.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 8f8cce2c46c..2cee7d1eb95 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -58,6 +58,8 @@ enum ipi_msg_type {
IPI_CPU_STOP,
};
+static DECLARE_COMPLETION(cpu_running);
+
int __cpuinit __cpu_up(unsigned int cpu)
{
struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
@@ -98,20 +100,12 @@ int __cpuinit __cpu_up(unsigned int cpu)
*/
ret = boot_secondary(cpu, idle);
if (ret == 0) {
- unsigned long timeout;
-
/*
* CPU was successfully started, wait for it
* to come online or time out.
*/
- timeout = jiffies + HZ;
- while (time_before(jiffies, timeout)) {
- if (cpu_online(cpu))
- break;
-
- udelay(10);
- barrier();
- }
+ wait_for_completion_timeout(&cpu_running,
+ msecs_to_jiffies(1000));
if (!cpu_online(cpu)) {
pr_crit("CPU%u: failed to come online\n", cpu);
@@ -288,9 +282,10 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
/*
* OK, now it's safe to let the boot CPU continue. Wait for
* the CPU migration code to notice that the CPU is online
- * before we continue.
+ * before we continue - which happens after __cpu_up returns.
*/
set_cpu_online(cpu, true);
+ complete(&cpu_running);
/*
* Setup the percpu timer for this CPU.