Merge branch 'akpm' (incoming from Andrew)

Merge misc fixes from Andrew Morton:
 "13 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  thp: close race between split and zap huge pages
  mm: fix new kernel-doc warning in filemap.c
  mm: fix CONFIG_DEBUG_VM_RB description
  mm: use paravirt friendly ops for NUMA hinting ptes
  mips: export flush_icache_range
  mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
  wait: explain the shadowing and type inconsistencies
  Shiraz has moved
  Documentation/vm/numa_memory_policy.txt: fix wrong document in numa_memory_policy.txt
  powerpc/mm: fix ".__node_distance" undefined
  kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()
  init/Kconfig: move the trusted keyring config option to general setup
  vmscan: reclaim_clean_pages_from_list() must use mod_zone_page_state()

23 files changed, 85 insertions, 47 deletions

diff --git a/.mailmap b/.mailmap
index 658003aa944..df1baba43a6 100644
--- a/.mailmap
+++ b/.mailmap
@@ -99,6 +99,7 @@ Sachin P Sant <ssant@in.ibm.com>
 Sam Ravnborg <sam@mars.ravnborg.org>
 Sascha Hauer <s.hauer@pengutronix.de>
 S.Çağlar Onur <caglar@pardus.org.tr>
+Shiraz Hashim <shiraz.linux.kernel@gmail.com> <shiraz.hashim@st.com>
 Simon Kelley <simon@thekelleys.org.uk>
 Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr>
 Stephen Hemminger <shemminger@osdl.org>
diff --git a/Documentation/vm/numa_memory_policy.txt b/Documentation/vm/numa_memory_policy.txt
index 4e7da654342..badb0507608 100644
--- a/Documentation/vm/numa_memory_policy.txt
+++ b/Documentation/vm/numa_memory_policy.txt
@@ -174,7 +174,6 @@ Components of Memory Policies
 	allocation fails, the kernel will search other nodes, in order of
 	increasing distance from the preferred node based on information
 	provided by the platform firmware.
-	containing the cpu where the allocation takes place.
 
 	    Internally, the Preferred policy uses a single node--the
 	    preferred_node member of struct mempolicy.  When the internal
@@ -275,9 +274,9 @@ Components of Memory Policies
 	    For example, consider a task that is attached to a cpuset with
 	    mems 2-5 that sets an Interleave policy over the same set with
 	    MPOL_F_RELATIVE_NODES.  If the cpuset's mems change to 3-7, the
-	    interleave now occurs over nodes 3,5-6.  If the cpuset's mems
+	    interleave now occurs over nodes 3,5-7.  If the cpuset's mems
 	    then change to 0,2-3,5, then the interleave occurs over nodes
-	    0,3,5.
+	    0,2-3,5.
 
 	    Thanks to the consistent remapping, applications preparing
 	    nodemasks to specify memory policies using this flag should
diff --git a/MAINTAINERS b/MAINTAINERS
index 80399fff805..e67ea244204 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8315,7 +8315,7 @@ F:	include/linux/compiler.h
 
 SPEAR PLATFORM SUPPORT
 M:	Viresh Kumar <viresh.linux@gmail.com>
-M:	Shiraz Hashim <shiraz.hashim@st.com>
+M:	Shiraz Hashim <shiraz.linux.kernel@gmail.com>
 L:	spear-devel@list.st.com
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 W:	http://www.st.com/spear
diff --git a/arch/arm/boot/dts/spear320-hmi.dts b/arch/arm/boot/dts/spear320-hmi.dts
index 3075d2d3a8b..0aa6fef5ce2 100644
--- a/arch/arm/boot/dts/spear320-hmi.dts
+++ b/arch/arm/boot/dts/spear320-hmi.dts
@@ -1,7 +1,7 @@
 /*
  * DTS file for SPEAr320 Evaluation Baord
  *
- * Copyright 2012 Shiraz Hashim <shiraz.hashim@st.com>
+ * Copyright 2012 Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
diff --git a/arch/arm/mach-spear/headsmp.S b/arch/arm/mach-spear/headsmp.S
index ed85473a047..c52192dc3d9 100644
--- a/arch/arm/mach-spear/headsmp.S
+++ b/arch/arm/mach-spear/headsmp.S
@@ -3,7 +3,7 @@
  *
  * Picked from realview
  * Copyright (c) 2012 ST Microelectronics Limited
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
diff --git a/arch/arm/mach-spear/platsmp.c b/arch/arm/mach-spear/platsmp.c
index 5c4a19887b2..c19751fff2c 100644
--- a/arch/arm/mach-spear/platsmp.c
+++ b/arch/arm/mach-spear/platsmp.c
@@ -4,7 +4,7 @@
  * based upon linux/arch/arm/mach-realview/platsmp.c
  *
  * Copyright (C) 2012 ST Microelectronics Ltd.
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
diff --git a/arch/arm/mach-spear/time.c b/arch/arm/mach-spear/time.c
index 218ba5b67d9..64790353951 100644
--- a/arch/arm/mach-spear/time.c
+++ b/arch/arm/mach-spear/time.c
@@ -2,7 +2,7 @@
  * arch/arm/plat-spear/time.c
  *
  * Copyright (C) 2010 ST Microelectronics
- * Shiraz Hashim<shiraz.hashim@st.com>
+ * Shiraz Hashim<shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index e422b38d311..9e67cdea3c7 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -29,15 +29,15 @@ void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
 void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
 	unsigned long pfn);
 void (*flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(flush_icache_range);
 void (*local_flush_icache_range)(unsigned long start, unsigned long end);
 
 void (*__flush_cache_vmap)(void);
 void (*__flush_cache_vunmap)(void);
 
 void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
-void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
-
 EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
+void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
 
 /* MIPS specific cache operations */
 void (*flush_cache_sigtramp)(unsigned long addr);
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 4ebbb9e9928..3b181b22cd4 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -232,6 +232,7 @@ int __node_distance(int a, int b)
 
 	return distance;
 }
+EXPORT_SYMBOL(__node_distance);
 
 static void initialize_distance_lookup_table(int nid,
 		const __be32 *associativity)
diff --git a/drivers/gpio/gpio-spear-spics.c b/drivers/gpio/gpio-spear-spics.c
index e9a0415834e..30bcc539425 100644
--- a/drivers/gpio/gpio-spear-spics.c
+++ b/drivers/gpio/gpio-spear-spics.c
@@ -2,7 +2,7 @@
  * SPEAr platform SPI chipselect abstraction over gpiolib
  *
  * Copyright (C) 2012 ST Microelectronics
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -205,6 +205,6 @@ static int __init spics_gpio_init(void)
 }
 subsys_initcall(spics_gpio_init);
 
-MODULE_AUTHOR("Shiraz Hashim <shiraz.hashim@st.com>");
+MODULE_AUTHOR("Shiraz Hashim <shiraz.linux.kernel@gmail.com>");
 MODULE_DESCRIPTION("ST Microlectronics SPEAr SPI Chip Select Abstraction");
 MODULE_LICENSE("GPL");
diff --git a/drivers/irqchip/spear-shirq.c b/drivers/irqchip/spear-shirq.c
index 8527743b5ce..3fdda3a4026 100644
--- a/drivers/irqchip/spear-shirq.c
+++ b/drivers/irqchip/spear-shirq.c
@@ -5,7 +5,7 @@
  * Viresh Kumar <viresh.linux@gmail.com>
  *
  * Copyright (C) 2012 ST Microelectronics
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index 363da96e689..c4176b0f382 100644
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -6,7 +6,7 @@
  *
  * Copyright © 2010 STMicroelectronics.
  * Ashish Priyadarshi
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -1089,5 +1089,5 @@ static struct platform_driver spear_smi_driver = {
 module_platform_driver(spear_smi_driver);
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Ashish Priyadarshi, Shiraz Hashim <shiraz.hashim@st.com>");
+MODULE_AUTHOR("Ashish Priyadarshi, Shiraz Hashim <shiraz.linux.kernel@gmail.com>");
 MODULE_DESCRIPTION("MTD SMI driver for serial nor flash chips");
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index 8ad26b8bf41..cb2d4f0f971 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -2,7 +2,7 @@
  * ST Microelectronics SPEAr Pulse Width Modulator driver
  *
  * Copyright (C) 2012 ST Microelectronics
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -264,6 +264,6 @@ static struct platform_driver spear_pwm_driver = {
 module_platform_driver(spear_pwm_driver);
 
 MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Shiraz Hashim <shiraz.hashim@st.com>");
+MODULE_AUTHOR("Shiraz Hashim <shiraz.linux.kernel@gmail.com>");
 MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.com>");
 MODULE_ALIAS("platform:spear-pwm");
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 1ec08c198b6..a8015a7a55b 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -693,24 +693,35 @@ static inline int pmd_numa(pmd_t pmd)
 #ifndef pte_mknonnuma
 static inline pte_t pte_mknonnuma(pte_t pte)
 {
-	pte = pte_clear_flags(pte, _PAGE_NUMA);
-	return pte_set_flags(pte, _PAGE_PRESENT|_PAGE_ACCESSED);
+	pteval_t val = pte_val(pte);
+
+	val &= ~_PAGE_NUMA;
+	val |= (_PAGE_PRESENT|_PAGE_ACCESSED);
+	return __pte(val);
 }
 #endif
 
 #ifndef pmd_mknonnuma
 static inline pmd_t pmd_mknonnuma(pmd_t pmd)
 {
-	pmd = pmd_clear_flags(pmd, _PAGE_NUMA);
-	return pmd_set_flags(pmd, _PAGE_PRESENT|_PAGE_ACCESSED);
+	pmdval_t val = pmd_val(pmd);
+
+	val &= ~_PAGE_NUMA;
+	val |= (_PAGE_PRESENT|_PAGE_ACCESSED);
+
+	return __pmd(val);
 }
 #endif
 
 #ifndef pte_mknuma
 static inline pte_t pte_mknuma(pte_t pte)
 {
-	pte = pte_set_flags(pte, _PAGE_NUMA);
-	return pte_clear_flags(pte, _PAGE_PRESENT);
+	pteval_t val = pte_val(pte);
+
+	val &= ~_PAGE_PRESENT;
+	val |= _PAGE_NUMA;
+
+	return __pte(val);
 }
 #endif
 
@@ -729,8 +740,12 @@ static inline void ptep_set_numa(struct mm_struct *mm, unsigned long addr,
 #ifndef pmd_mknuma
 static inline pmd_t pmd_mknuma(pmd_t pmd)
 {
-	pmd = pmd_set_flags(pmd, _PAGE_NUMA);
-	return pmd_clear_flags(pmd, _PAGE_PRESENT);
+	pmdval_t val = pmd_val(pmd);
+
+	val &= ~_PAGE_PRESENT;
+	val |= _PAGE_NUMA;
+
+	return __pmd(val);
 }
 #endif
 
diff --git a/include/linux/mtd/spear_smi.h b/include/linux/mtd/spear_smi.h
index 8ae1726044c..581603ac127 100644
--- a/include/linux/mtd/spear_smi.h
+++ b/include/linux/mtd/spear_smi.h
@@ -1,6 +1,6 @@
 /*
  * Copyright © 2010 ST Microelectronics
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
diff --git a/include/linux/wait.h b/include/linux/wait.h
index e7d9d9ed14f..bd68819f081 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -191,11 +191,23 @@ wait_queue_head_t *bit_waitqueue(void *, int);
 	(!__builtin_constant_p(state) ||				\
 		state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE)	\
 
+/*
+ * The below macro ___wait_event() has an explicit shadow of the __ret
+ * variable when used from the wait_event_*() macros.
+ *
+ * This is so that both can use the ___wait_cond_timeout() construct
+ * to wrap the condition.
+ *
+ * The type inconsistency of the wait_event_*() __ret variable is also
+ * on purpose; we use long where we can return timeout values and int
+ * otherwise.
+ */
+
 #define ___wait_event(wq, condition, state, exclusive, ret, cmd)	\
 ({									\
 	__label__ __out;						\
 	wait_queue_t __wait;						\
-	long __ret = ret;						\
+	long __ret = ret;	/* explicit shadow */			\
 									\
 	INIT_LIST_HEAD(&__wait.task_list);				\
 	if (exclusive)							\
diff --git a/init/Kconfig b/init/Kconfig
index 765018c24cf..9d3585bb2a7 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1646,6 +1646,18 @@ config MMAP_ALLOW_UNINITIALIZED
 
 	  See Documentation/nommu-mmap.txt for more information.
 
+config SYSTEM_TRUSTED_KEYRING
+	bool "Provide system-wide ring of trusted keys"
+	depends on KEYS
+	help
+	  Provide a system keyring to which trusted keys can be added.  Keys in
+	  the keyring are considered to be trusted.  Keys may be added at will
+	  by the kernel from compiled-in data and from hardware key stores, but
+	  userspace may only add extra keys if those keys can be verified by
+	  keys already in the keyring.
+
+	  Keys in this keyring are used by module signature checking.
+
 config PROFILING
 	bool "Profiling support"
 	help
@@ -1681,18 +1693,6 @@ config BASE_SMALL
 	default 0 if BASE_FULL
 	default 1 if !BASE_FULL
 
-config SYSTEM_TRUSTED_KEYRING
-	bool "Provide system-wide ring of trusted keys"
-	depends on KEYS
-	help
-	  Provide a system keyring to which trusted keys can be added.  Keys in
-	  the keyring are considered to be trusted.  Keys may be added at will
-	  by the kernel from compiled-in data and from hardware key stores, but
-	  userspace may only add extra keys if those keys can be verified by
-	  keys already in the keyring.
-
-	  Keys in this keyring are used by module signature checking.
-
 menuconfig MODULES
 	bool "Enable loadable module support"
 	option modules
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index e90089fd78e..516203e665f 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -138,7 +138,11 @@ static void __touch_watchdog(void)
 
 void touch_softlockup_watchdog(void)
 {
-	__this_cpu_write(watchdog_touch_ts, 0);
+	/*
+	 * Preemption can be enabled.  It doesn't matter which CPU's timestamp
+	 * gets zeroed here, so use the raw_ operation.
+	 */
+	raw_cpu_write(watchdog_touch_ts, 0);
 }
 EXPORT_SYMBOL(touch_softlockup_watchdog);
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 140b66a874c..819ac51202c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -505,8 +505,7 @@ config DEBUG_VM_RB
 	bool "Debug VM red-black trees"
 	depends on DEBUG_VM
 	help
-	  Enable this to turn on more extended checks in the virtual-memory
-	  system that may impact performance.
+	  Enable VM red-black tree debugging information and extra validations.
 
 	  If unsure, say N.
 
diff --git a/mm/filemap.c b/mm/filemap.c
index a82fbe4c9e8..5020b280a77 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2581,7 +2581,6 @@ EXPORT_SYMBOL(generic_perform_write);
  * @iocb:	IO state structure (file, offset, etc.)
  * @iov:	vector with data to write
  * @nr_segs:	number of segments in the vector
- * @ppos:	position where to write
  *
  * This function does all the work needed for actually writing data to a
  * file. It does all basic checks, removes SUID from the file, updates
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 64635f5278f..b4b1feba647 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1536,16 +1536,23 @@ pmd_t *page_check_address_pmd(struct page *page,
 			      enum page_check_address_pmd_flag flag,
 			      spinlock_t **ptl)
 {
+	pgd_t *pgd;
+	pud_t *pud;
 	pmd_t *pmd;
 
 	if (address & ~HPAGE_PMD_MASK)
 		return NULL;
 
-	pmd = mm_find_pmd(mm, address);
-	if (!pmd)
+	pgd = pgd_offset(mm, address);
+	if (!pgd_present(*pgd))
 		return NULL;
+	pud = pud_offset(pgd, address);
+	if (!pud_present(*pud))
+		return NULL;
+	pmd = pmd_offset(pud, address);
+
 	*ptl = pmd_lock(mm, pmd);
-	if (pmd_none(*pmd))
+	if (!pmd_present(*pmd))
 		goto unlock;
 	if (pmd_page(*pmd) != page)
 		goto unlock;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index dd30f22b35e..246192929a2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1172,6 +1172,7 @@ static void return_unused_surplus_pages(struct hstate *h,
 	while (nr_pages--) {
 		if (!free_pool_huge_page(h, &node_states[N_MEMORY], 1))
 			break;
+		cond_resched_lock(&hugetlb_lock);
 	}
 }
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9b6497eda80..3f56c8deb3c 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1158,7 +1158,7 @@ unsigned long reclaim_clean_pages_from_list(struct zone *zone,
 			TTU_UNMAP|TTU_IGNORE_ACCESS,
 			&dummy1, &dummy2, &dummy3, &dummy4, &dummy5, true);
 	list_splice(&clean_pages, page_list);
-	__mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret);
+	mod_zone_page_state(zone, NR_ISOLATED_FILE, -ret);
 	return ret;
 }