Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=11ab244c9faead91683a12e4cb10d26b279bb4aa Commit: 11ab244c9faead91683a12e4cb10d26b279bb4aa Parent: 057c5cb35ece6ae3a4c2cb849f3948c5ad6add32 Author: Heiko Carstens <[EMAIL PROTECTED]> AuthorDate: Tue Feb 19 15:29:26 2008 +0100 Committer: Martin Schwidefsky <[EMAIL PROTECTED]> CommitDate: Tue Feb 19 15:29:33 2008 +0100
[S390] Make sure enabled wait psw is loaded in default_idle. If both NO_IDLE_HZ and VIRT_TIMER are disabled default_idle won't load an enabled wait psw and busy loop instead. This is because the idle_chain is empty and the return value of atomic_notifier_call_chain will be NOTIFY_DONE, which causes default_idle to return instead of loading an enabled wait psw. Fix this by calling __atomic_notifier_call_chain instead and add proper return value handling. Signed-off-by: Heiko Carstens <[EMAIL PROTECTED]> Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]> --- arch/s390/kernel/process.c | 15 +++++++++------ 1 files changed, 9 insertions(+), 6 deletions(-) diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index a6a4729..1c59ec1 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -114,24 +114,27 @@ extern void s390_handle_mcck(void); static void default_idle(void) { int cpu, rc; + int nr_calls = 0; + void *hcpu; #ifdef CONFIG_SMP struct s390_idle_data *idle; #endif /* CPU is going idle. */ cpu = smp_processor_id(); - + hcpu = (void *)(long)cpu; local_irq_disable(); if (need_resched()) { local_irq_enable(); return; } - rc = atomic_notifier_call_chain(&idle_chain, - S390_CPU_IDLE, (void *)(long) cpu); - if (rc != NOTIFY_OK && rc != NOTIFY_DONE) - BUG(); - if (rc != NOTIFY_OK) { + rc = __atomic_notifier_call_chain(&idle_chain, S390_CPU_IDLE, hcpu, -1, + &nr_calls); + if (rc == NOTIFY_BAD) { + nr_calls--; + __atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE, + hcpu, nr_calls, NULL); local_irq_enable(); return; } - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html