linux-kernel - [tip:smp/hotplug] parisc: Use generic idle loop

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Message-ID: <tip-fad48ad63dd14656e3b571d42f700a1f2cadd036@git.kernel.org>
Date:	Mon, 8 Apr 2013 13:38:07 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rusty@...tcorp.com.au, torvalds@...ux-foundation.org,
	peterz@...radead.org, srivatsa.bhat@...ux.vnet.ibm.com,
	paulmck@...ux.vnet.ibm.com, jejb@...isc-linux.org,
	tglx@...utronix.de, deller@....de, magnus.damm@...il.com
Subject: [tip:smp/hotplug] parisc: Use generic idle loop

Commit-ID:  fad48ad63dd14656e3b571d42f700a1f2cadd036
Gitweb:     http://git.kernel.org/tip/fad48ad63dd14656e3b571d42f700a1f2cadd036
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:55 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:27 +0200

parisc: Use generic idle loop

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