Merge commit '8700c95adb03' into timers/nohz

The full dynticks tree needs the latest RCU and sched
upstream updates in order to fix some dependencies.

Merge a common upstream merge point that has these
updates.

Conflicts:
	include/linux/perf_event.h
	kernel/rcutree.h
	kernel/rcutree_plugin.h

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

5 files changed, 5 insertions, 102 deletions

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 014a6482ed4c..9ab3bf2eca8d 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -9,10 +9,9 @@ config OPENRISC
 	select OF_EARLY_FLATTREE
 	select IRQ_DOMAIN
 	select HAVE_MEMBLOCK
-	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select ARCH_REQUIRE_GPIOLIB
         select HAVE_ARCH_TRACEHOOK
 	select HAVE_GENERIC_HARDIRQS
-	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_CHIP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
diff --git a/arch/openrisc/include/asm/thread_info.h b/arch/openrisc/include/asm/thread_info.h
index 07f3212422ad..d797acc901e4 100644
--- a/arch/openrisc/include/asm/thread_info.h
+++ b/arch/openrisc/include/asm/thread_info.h
@@ -128,8 +128,6 @@ register struct thread_info *current_thread_info_reg asm("r10");
 /* For OpenRISC, this is anything in the LSW other than syscall trace */
 #define _TIF_WORK_MASK (0xff & ~(_TIF_SYSCALL_TRACE|_TIF_SINGLESTEP))
 
-#define tsk_is_polling(t) test_tsk_thread_flag(t, TIF_POLLING_NRFLAG)
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_THREAD_INFO_H */
diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile
index 35f92ce51c24..ec6d9d37cefd 100644
--- a/arch/openrisc/kernel/Makefile
+++ b/arch/openrisc/kernel/Makefile
@@ -4,7 +4,7 @@
 
 extra-y	:= head.o vmlinux.lds
 
-obj-y	:= setup.o idle.o or32_ksyms.o process.o dma.o \
+obj-y	:= setup.o or32_ksyms.o process.o dma.o \
 	   traps.o time.o irq.o entry.o ptrace.o signal.o \
 	   sys_call_table.o
 
diff --git a/arch/openrisc/kernel/idle.c b/arch/openrisc/kernel/idle.c
deleted file mode 100644
index 5e8a3b6d6bc6..000000000000
--- a/arch/openrisc/kernel/idle.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * OpenRISC idle.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others.  All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
- *
- * Idle daemon for or32.  Idle daemon will handle any action
- * that needs to be taken when the system becomes idle.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/tick.h>
-
-#include <asm/pgtable.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/cache.h>
-#include <asm/pgalloc.h>
-
-void (*powersave) (void) = NULL;
-
-void cpu_idle(void)
-{
-	set_thread_flag(TIF_POLLING_NRFLAG);
-
-	/* endless idle loop with no priority at all */
-	while (1) {
-		tick_nohz_idle_enter();
-		rcu_idle_enter();
-
-		while (!need_resched()) {
-			check_pgt_cache();
-			rmb();
-
-			clear_thread_flag(TIF_POLLING_NRFLAG);
-
-			local_irq_disable();
-			/* Don't trace irqs off for idle */
-			stop_critical_timings();
-			if (!need_resched() && powersave != NULL)
-				powersave();
-			start_critical_timings();
-			local_irq_enable();
-			set_thread_flag(TIF_POLLING_NRFLAG);
-		}
-
-		rcu_idle_exit();
-		tick_nohz_idle_exit();
-		preempt_enable_no_resched();
-		schedule();
-		preempt_disable();
-	}
-}
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index e7fdc50c4bf0..b3cbc6703837 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -43,6 +43,7 @@
 #include <asm/kmap_types.h>
 #include <asm/fixmap.h>
 #include <asm/tlbflush.h>
+#include <asm/sections.h>
 
 int mem_init_done;
 
@@ -201,9 +202,6 @@ void __init paging_init(void)
 
 /* References to section boundaries */
 
-extern char _stext, _etext, _edata, __bss_start, _end;
-extern char __init_begin, __init_end;
-
 static int __init free_pages_init(void)
 {
 	int reservedpages, pfn;
@@ -263,30 +261,11 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
-	       (end - start) >> 10);
-
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-	}
+	free_reserved_area(start, end, 0, "initrd");
 }
 #endif
 
 void free_initmem(void)
 {
-	unsigned long addr;
-
-	addr = (unsigned long)(&__init_begin);
-	for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-	printk(KERN_INFO "Freeing unused kernel memory: %luk freed\n",
-	       ((unsigned long)&__init_end -
-		(unsigned long)&__init_begin) >> 10);
+	free_initmem_default(0);
 }