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    Subject[tip:smp/hotplug] parisc: Use generic idle loop
    Commit-ID:  fad48ad63dd14656e3b571d42f700a1f2cadd036
    Gitweb: http://git.kernel.org/tip/fad48ad63dd14656e3b571d42f700a1f2cadd036
    Author: Thomas Gleixner <tglx@linutronix.de>
    AuthorDate: Thu, 21 Mar 2013 22:49:55 +0100
    Committer: Thomas Gleixner <tglx@linutronix.de>
    CommitDate: Mon, 8 Apr 2013 17:39:27 +0200

    parisc: Use generic idle loop

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
    Cc: Magnus Damm <magnus.damm@gmail.com>
    Cc: James E.J. Bottomley <jejb@parisc-linux.org>
    Cc: Helge Deller <deller@gmx.de>
    Link: http://lkml.kernel.org/r/20130321215234.956305981@linutronix.de
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

    ---
    arch/parisc/Kconfig | 1 +
    arch/parisc/kernel/process.c | 22 ----------------------
    arch/parisc/kernel/smp.c | 2 +-
    3 files changed, 2 insertions(+), 23 deletions(-)

    diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
    index 0339181..0821e70 100644
    --- a/arch/parisc/Kconfig
    +++ b/arch/parisc/Kconfig
    @@ -18,6 +18,7 @@ config PARISC
    select GENERIC_PCI_IOMAP
    select ARCH_HAVE_NMI_SAFE_CMPXCHG
    select GENERIC_SMP_IDLE_THREAD
    + select GENERIC_IDLE_LOOP
    select GENERIC_STRNCPY_FROM_USER
    select SYSCTL_ARCH_UNALIGN_ALLOW
    select HAVE_MOD_ARCH_SPECIFIC
    diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
    index d135072..55f92b6 100644
    --- a/arch/parisc/kernel/process.c
    +++ b/arch/parisc/kernel/process.c
    @@ -59,28 +59,6 @@
    #include <asm/unwind.h>
    #include <asm/sections.h>

    -/*
    - * The idle thread. There's no useful work to be
    - * done, so just try to conserve power and have a
    - * low exit latency (ie sit in a loop waiting for
    - * somebody to say that they'd like to reschedule)
    - */
    -void cpu_idle(void)
    -{
    - set_thread_flag(TIF_POLLING_NRFLAG);
    -
    - /* endless idle loop with no priority at all */
    - while (1) {
    - rcu_idle_enter();
    - while (!need_resched())
    - barrier();
    - rcu_idle_exit();
    - schedule_preempt_disabled();
    - check_pgt_cache();
    - }
    -}
    -
    -
    #define COMMAND_GLOBAL F_EXTEND(0xfffe0030)
    #define CMD_RESET 5 /* reset any module */

    diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
    index 6266730..fd1bb15 100644
    --- a/arch/parisc/kernel/smp.c
    +++ b/arch/parisc/kernel/smp.c
    @@ -329,7 +329,7 @@ void __init smp_callin(void)

    local_irq_enable(); /* Interrupts have been off until now */

    - cpu_idle(); /* Wait for timer to schedule some work */
    + cpu_startup_entry(CPUHP_ONLINE);

    /* NOTREACHED */
    panic("smp_callin() AAAAaaaaahhhh....\n");

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