Merge branch 'akpm' (patches from Andrew Morton)

Merge random fixes from Andrew Morton:
 "Random fixes.

  I have one batch remaining for -rc1, mainly zram changes which await a
  merge of Jens's trees"

* emailed patches fron Andrew Morton akpm@linux-foundation.org>:
  MAINTAINERS: ADI Linux development mailing lists: change to the new server
  Documentation: fix multiple typo occurences s/KenelVersion/KernelVersion/
  dma-debug: fix overlap detection
  memblock: add limit checking to memblock_virt_alloc
  mm/readahead.c: fix do_readahead() for no readpage(s)
  mm/slub.c: do not VM_BUG_ON_PAGE() for temporary on-stack pages
  slab: fix wrong retval on kmem_cache_create_memcg error path
  s390/compat: change parameter types from unsigned long to compat_ulong_t
  fs/compat: fix lookup_dcookie() parameter handling
  fs/compat: fix parameter handling for compat readv/writev syscalls
  mm/mempolicy.c: convert to pr_foo()
  mm: numa: initialise numa balancing after jump label initialisation
  mm/page-writeback.c: do not count anon pages as dirtyable memory
  mm/page-writeback.c: fix dirty_balance_reserve subtraction from dirtyable memory
  mm: document improved handling of swappiness==0
  lib/genalloc.c: add check gen_pool_dma_alloc() if dma pointer is not NULL

Documentation/ABI/testing/configfs-usb-gadget

 What:		/config/usb-gadget
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		This group contains sub-groups corresponding to created
 		USB gadgets.
 
 What:		/config/usb-gadget/gadget
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 
 		The attributes of a gadget:
@@ -27,7 +27,7 @@ Description:
 
 What:		/config/usb-gadget/gadget/configs
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		This group contains a USB gadget's configurations
 
@@ -58,20 +58,20 @@ Description:
 
 What:		/config/usb-gadget/gadget/functions
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		This group contains functions available to this USB gadget.
 
 What:		/config/usb-gadget/gadget/strings
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		This group contains subdirectories for language-specific
 		strings for this gadget.
 
 What:		/config/usb-gadget/gadget/strings/language
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-acm

 What:		/config/usb-gadget/gadget/functions/acm.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 
 		This item contains just one readonly attribute: port_num.

Documentation/ABI/testing/configfs-usb-gadget-ecm

 What:		/config/usb-gadget/gadget/functions/ecm.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-eem

 What:		/config/usb-gadget/gadget/functions/eem.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-ffs

 What:		/config/usb-gadget/gadget/functions/ffs.name
 Date:		Nov 2013
-KenelVersion:	3.13
+KernelVersion:	3.13
 Description:	The purpose of this directory is to create and remove it.
 
 		A corresponding USB function instance is created/removed.

Documentation/ABI/testing/configfs-usb-gadget-loopback

 What:		/config/usb-gadget/gadget/functions/Loopback.name
 Date:		Nov 2013
-KenelVersion:	3.13
+KernelVersion:	3.13
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-mass-storage

 What:		/config/usb-gadget/gadget/functions/mass_storage.name
 Date:		Oct 2013
-KenelVersion:	3.13
+KernelVersion:	3.13
 Description:
 		The attributes:
 
@@ -13,7 +13,7 @@ Description:
 
 What:		/config/usb-gadget/gadget/functions/mass_storage.name/lun.name
 Date:		Oct 2013
-KenelVersion:	3.13
+KernelVersion:	3.13
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-ncm

 What:		/config/usb-gadget/gadget/functions/ncm.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-obex

 What:		/config/usb-gadget/gadget/functions/obex.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 
 		This item contains just one readonly attribute: port_num.

Documentation/ABI/testing/configfs-usb-gadget-phonet

 What:		/config/usb-gadget/gadget/functions/phonet.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 
 		This item contains just one readonly attribute: ifname.

Documentation/ABI/testing/configfs-usb-gadget-rndis

 What:		/config/usb-gadget/gadget/functions/rndis.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-serial

 What:		/config/usb-gadget/gadget/functions/gser.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 
 		This item contains just one readonly attribute: port_num.

Documentation/ABI/testing/configfs-usb-gadget-sourcesink

 What:		/config/usb-gadget/gadget/functions/SourceSink.name
 Date:		Nov 2013
-KenelVersion:	3.13
+KernelVersion:	3.13
 Description:
 		The attributes:
 

Documentation/ABI/testing/configfs-usb-gadget-subset

 What:		/config/usb-gadget/gadget/functions/geth.name
 Date:		Jun 2013
-KenelVersion:	3.11
+KernelVersion:	3.11
 Description:
 		The attributes:
 

Documentation/sysctl/vm.txt

@@ -696,7 +696,9 @@ swappiness
 
 This control is used to define how aggressive the kernel will swap
 memory pages.  Higher values will increase agressiveness, lower values
-decrease the amount of swap.
+decrease the amount of swap.  A value of 0 instructs the kernel not to
+initiate swap until the amount of free and file-backed pages is less
+than the high water mark in a zone.
 
 The default value is 60.
 

MAINTAINERS

@@ -309,36 +309,36 @@ F:	sound/pci/ad1889.*
 
 AD525X ANALOG DEVICES DIGITAL POTENTIOMETERS DRIVER
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/AD5254
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/misc/ad525x_dpot.c
 
 AD5398 CURRENT REGULATOR DRIVER (AD5398/AD5821)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/AD5398
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/regulator/ad5398.c
 
 AD714X CAPACITANCE TOUCH SENSOR DRIVER (AD7142/3/7/8/7A)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/AD7142
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/misc/ad714x.c
 
 AD7877 TOUCHSCREEN DRIVER
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/AD7877
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/touchscreen/ad7877.c
 
 AD7879 TOUCHSCREEN DRIVER (AD7879/AD7889)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/AD7879
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/touchscreen/ad7879.c
 
@@ -374,8 +374,8 @@ F:	include/media/adp1653.h
 
 ADP5520 BACKLIGHT DRIVER WITH IO EXPANDER (ADP5520/ADP5501)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/ADP5520
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/mfd/adp5520.c
 F:	drivers/video/backlight/adp5520_bl.c
@@ -385,16 +385,16 @@ F:	drivers/input/keyboard/adp5520-keys.c
 
 ADP5588 QWERTY KEYPAD AND IO EXPANDER DRIVER (ADP5588/ADP5587)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/ADP5588
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/keyboard/adp5588-keys.c
 F:	drivers/gpio/gpio-adp5588.c
 
 ADP8860 BACKLIGHT DRIVER (ADP8860/ADP8861/ADP8863)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/ADP8860
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/video/backlight/adp8860_bl.c
 
@@ -420,8 +420,8 @@ F:	drivers/hwmon/adt7475.c
 
 ADXL34X THREE-AXIS DIGITAL ACCELEROMETER DRIVER (ADXL345/ADXL346)
 M:	Michael Hennerich <michael.hennerich@analog.com>
-L:	device-drivers-devel@blackfin.uclinux.org
 W:	http://wiki.analog.com/ADXL345
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/input/misc/adxl34x.c
 
@@ -627,9 +627,9 @@ F:	drivers/media/i2c/adv7842*
 
 ANALOG DEVICES INC ASOC CODEC DRIVERS
 M:	Lars-Peter Clausen <lars@metafoo.de>
-L:	device-drivers-devel@blackfin.uclinux.org
 L:	alsa-devel@alsa-project.org (moderated for non-subscribers)
 W:	http://wiki.analog.com/
+W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	sound/soc/codecs/adau*
 F:	sound/soc/codecs/adav*
@@ -639,7 +639,7 @@ F:	sound/soc/codecs/ssm*
 F:	sound/soc/codecs/sigmadsp.*
 
 ANALOG DEVICES INC ASOC DRIVERS
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 L:	alsa-devel@alsa-project.org (moderated for non-subscribers)
 W:	http://blackfin.uclinux.org/
 S:	Supported
@@ -1742,56 +1742,54 @@ F:	fs/bfs/
 F:	include/uapi/linux/bfs_fs.h
 
 BLACKFIN ARCHITECTURE
-M:	Mike Frysinger <vapier@gentoo.org>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+M:	Steven Miao <realmz6@gmail.com>
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	arch/blackfin/
 
 BLACKFIN EMAC DRIVER
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	drivers/net/ethernet/adi/
 
 BLACKFIN RTC DRIVER
-M:	Mike Frysinger <vapier.adi@gmail.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	drivers/rtc/rtc-bfin.c
 
 BLACKFIN SDH DRIVER
 M:	Sonic Zhang <sonic.zhang@analog.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	drivers/mmc/host/bfin_sdh.c
 
 BLACKFIN SERIAL DRIVER
 M:	Sonic Zhang <sonic.zhang@analog.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	drivers/tty/serial/bfin_uart.c
 
 BLACKFIN WATCHDOG DRIVER
-M:	Mike Frysinger <vapier.adi@gmail.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org
 S:	Supported
 F:	drivers/watchdog/bfin_wdt.c
 
 BLACKFIN I2C TWI DRIVER
 M:	Sonic Zhang <sonic.zhang@analog.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org/
 S:	Supported
 F:	drivers/i2c/busses/i2c-bfin-twi.c
 
 BLACKFIN MEDIA DRIVER
 M:	Scott Jiang <scott.jiang.linux@gmail.com>
-L:	uclinux-dist-devel@blackfin.uclinux.org
+L:	adi-buildroot-devel@lists.sourceforge.net
 W:	http://blackfin.uclinux.org/
 S:	Supported
 F:	drivers/media/platform/blackfin/

arch/s390/kernel/compat_linux.c

@@ -286,8 +286,8 @@ asmlinkage long sys32_getegid16(void)
 }
 
 #ifdef CONFIG_SYSVIPC
-COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
-		unsigned long, third, compat_uptr_t, ptr)
+COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
+		compat_ulong_t, third, compat_uptr_t, ptr)
 {
 	if (call >> 16)		/* hack for backward compatibility */
 		return -EINVAL;

fs/dcookies.c

@@ -204,7 +204,7 @@ SYSCALL_DEFINE3(lookup_dcookie, u64, cookie64, char __user *, buf, size_t, len)
 }
 
 #ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, size_t, len)
+COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, w0, u32, w1, char __user *, buf, compat_size_t, len)
 {
 #ifdef __BIG_ENDIAN
 	return sys_lookup_dcookie(((u64)w0 << 32) | w1, buf, len);

fs/read_write.c

@@ -964,9 +964,9 @@ static size_t compat_readv(struct file *file,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE3(readv, unsigned long, fd,
+COMPAT_SYSCALL_DEFINE3(readv, compat_ulong_t, fd,
 		const struct compat_iovec __user *,vec,
-		unsigned long, vlen)
+		compat_ulong_t, vlen)
 {
 	struct fd f = fdget(fd);
 	ssize_t ret;
@@ -1001,9 +1001,9 @@ COMPAT_SYSCALL_DEFINE4(preadv64, unsigned long, fd,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE5(preadv, unsigned long, fd,
+COMPAT_SYSCALL_DEFINE5(preadv, compat_ulong_t, fd,
 		const struct compat_iovec __user *,vec,
-		unsigned long, vlen, u32, pos_low, u32, pos_high)
+		compat_ulong_t, vlen, u32, pos_low, u32, pos_high)
 {
 	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
 	return compat_sys_preadv64(fd, vec, vlen, pos);
@@ -1031,9 +1031,9 @@ static size_t compat_writev(struct file *file,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE3(writev, unsigned long, fd,
+COMPAT_SYSCALL_DEFINE3(writev, compat_ulong_t, fd,
 		const struct compat_iovec __user *, vec,
-		unsigned long, vlen)
+		compat_ulong_t, vlen)
 {
 	struct fd f = fdget(fd);
 	ssize_t ret;
@@ -1068,9 +1068,9 @@ COMPAT_SYSCALL_DEFINE4(pwritev64, unsigned long, fd,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE5(pwritev, unsigned long, fd,
+COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd,
 		const struct compat_iovec __user *,vec,
-		unsigned long, vlen, u32, pos_low, u32, pos_high)
+		compat_ulong_t, vlen, u32, pos_low, u32, pos_high)
 {
 	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
 	return compat_sys_pwritev64(fd, vec, vlen, pos);

include/linux/compat.h

@@ -327,16 +327,16 @@ asmlinkage long compat_sys_keyctl(u32 option,
 			      u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 
-asmlinkage ssize_t compat_sys_readv(unsigned long fd,
-		const struct compat_iovec __user *vec, unsigned long vlen);
-asmlinkage ssize_t compat_sys_writev(unsigned long fd,
-		const struct compat_iovec __user *vec, unsigned long vlen);
-asmlinkage ssize_t compat_sys_preadv(unsigned long fd,
+asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
+		const struct compat_iovec __user *vec, compat_ulong_t vlen);
+asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
+		const struct compat_iovec __user *vec, compat_ulong_t vlen);
+asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 		const struct compat_iovec __user *vec,
-		unsigned long vlen, u32 pos_low, u32 pos_high);
-asmlinkage ssize_t compat_sys_pwritev(unsigned long fd,
+		compat_ulong_t vlen, u32 pos_low, u32 pos_high);
+asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 		const struct compat_iovec __user *vec,
-		unsigned long vlen, u32 pos_low, u32 pos_high);
+		compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 asmlinkage long comat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 
 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
@@ -422,7 +422,7 @@ extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 				  compat_long_t addr, compat_long_t data);
 
-asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, size_t);
+asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 /*
  * epoll (fs/eventpoll.c) compat bits follow ...
  */

include/linux/vmstat.h

@@ -142,8 +142,6 @@ static inline unsigned long zone_page_state_snapshot(struct zone *zone,
 	return x;
 }
 
-extern unsigned long global_reclaimable_pages(void);
-
 #ifdef CONFIG_NUMA
 /*
  * Determine the per node value of a stat item. This function

lib/dma-debug.c

@@ -463,7 +463,7 @@ static int active_pfn_set_overlap(unsigned long pfn, int overlap)
 	int i;
 
 	if (overlap > ACTIVE_PFN_MAX_OVERLAP || overlap < 0)
-		return 0;
+		return overlap;
 
 	for (i = RADIX_TREE_MAX_TAGS - 1; i >= 0; i--)
 		if (overlap & 1 << i)
@@ -486,7 +486,7 @@ static void active_pfn_inc_overlap(unsigned long pfn)
 	 * debug_dma_assert_idle() as the pfn may be marked idle
 	 * prematurely.
 	 */
-	WARN_ONCE(overlap == 0,
+	WARN_ONCE(overlap > ACTIVE_PFN_MAX_OVERLAP,
 		  "DMA-API: exceeded %d overlapping mappings of pfn %lx\n",
 		  ACTIVE_PFN_MAX_OVERLAP, pfn);
 }
@@ -517,7 +517,11 @@ static void active_pfn_remove(struct dma_debug_entry *entry)
 	unsigned long flags;
 
 	spin_lock_irqsave(&radix_lock, flags);
-	if (active_pfn_dec_overlap(entry->pfn) == 0)
+	/* since we are counting overlaps the final put of the
+	 * entry->pfn will occur when the overlap count is 0.
+	 * active_pfn_dec_overlap() returns -1 in that case
+	 */
+	if (active_pfn_dec_overlap(entry->pfn) < 0)
 		radix_tree_delete(&dma_active_pfn, entry->pfn);
 	spin_unlock_irqrestore(&radix_lock, flags);
 }

lib/genalloc.c

@@ -316,7 +316,7 @@ EXPORT_SYMBOL(gen_pool_alloc);
  * gen_pool_dma_alloc - allocate special memory from the pool for DMA usage
  * @pool: pool to allocate from
  * @size: number of bytes to allocate from the pool
- * @dma: dma-view physical address
+ * @dma: dma-view physical address return value.  Use NULL if unneeded.
  *
  * Allocate the requested number of bytes from the specified pool.
  * Uses the pool allocation function (with first-fit algorithm by default).
@@ -334,7 +334,8 @@ void *gen_pool_dma_alloc(struct gen_pool *pool, size_t size, dma_addr_t *dma)
 	if (!vaddr)
 		return NULL;
 
-	*dma = gen_pool_virt_to_phys(pool, vaddr);
+	if (dma)
+		*dma = gen_pool_virt_to_phys(pool, vaddr);
 
 	return (void *)vaddr;
 }

mm/internal.h

@@ -83,7 +83,6 @@ extern unsigned long highest_memmap_pfn;
  */
 extern int isolate_lru_page(struct page *page);
 extern void putback_lru_page(struct page *page);
-extern unsigned long zone_reclaimable_pages(struct zone *zone);
 extern bool zone_reclaimable(struct zone *zone);
 
 /*

mm/memblock.c

@@ -1077,6 +1077,9 @@ static void * __init memblock_virt_alloc_internal(
 	if (!align)
 		align = SMP_CACHE_BYTES;
 
+	if (max_addr > memblock.current_limit)
+		max_addr = memblock.current_limit;
+
 again:
 	alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
 					    nid);

mm/mempolicy.c

@@ -2654,7 +2654,7 @@ void mpol_free_shared_policy(struct shared_policy *p)
 }
 
 #ifdef CONFIG_NUMA_BALANCING
-static bool __initdata numabalancing_override;
+static int __initdata numabalancing_override;
 
 static void __init check_numabalancing_enable(void)
 {
@@ -2663,9 +2663,15 @@ static void __init check_numabalancing_enable(void)
 	if (IS_ENABLED(CONFIG_NUMA_BALANCING_DEFAULT_ENABLED))
 		numabalancing_default = true;
 
+	/* Parsed by setup_numabalancing. override == 1 enables, -1 disables */
+	if (numabalancing_override)
+		set_numabalancing_state(numabalancing_override == 1);
+
 	if (nr_node_ids > 1 && !numabalancing_override) {
-		printk(KERN_INFO "Enabling automatic NUMA balancing. "
-			"Configure with numa_balancing= or the kernel.numa_balancing sysctl");
+		pr_info("%s automatic NUMA balancing. "
+			"Configure with numa_balancing= or the "
+			"kernel.numa_balancing sysctl",
+			numabalancing_default ? "Enabling" : "Disabling");
 		set_numabalancing_state(numabalancing_default);
 	}
 }
@@ -2675,18 +2681,17 @@ static int __init setup_numabalancing(char *str)
 	int ret = 0;
 	if (!str)
 		goto out;
-	numabalancing_override = true;
 
 	if (!strcmp(str, "enable")) {
-		set_numabalancing_state(true);
+		numabalancing_override = 1;
 		ret = 1;
 	} else if (!strcmp(str, "disable")) {
-		set_numabalancing_state(false);
+		numabalancing_override = -1;
 		ret = 1;
 	}
 out:
 	if (!ret)
-		printk(KERN_WARNING "Unable to parse numa_balancing=\n");
+		pr_warn("Unable to parse numa_balancing=\n");
 
 	return ret;
 }

mm/page-writeback.c

@@ -191,6 +191,26 @@ static unsigned long writeout_period_time = 0;
  * global dirtyable memory first.
  */
 
+/**
+ * zone_dirtyable_memory - number of dirtyable pages in a zone
+ * @zone: the zone
+ *
+ * Returns the zone's number of pages potentially available for dirty
+ * page cache.  This is the base value for the per-zone dirty limits.
+ */
+static unsigned long zone_dirtyable_memory(struct zone *zone)
+{
+	unsigned long nr_pages;
+
+	nr_pages = zone_page_state(zone, NR_FREE_PAGES);
+	nr_pages -= min(nr_pages, zone->dirty_balance_reserve);
+
+	nr_pages += zone_page_state(zone, NR_INACTIVE_FILE);
+	nr_pages += zone_page_state(zone, NR_ACTIVE_FILE);
+
+	return nr_pages;
+}
+
 static unsigned long highmem_dirtyable_memory(unsigned long total)
 {
 #ifdef CONFIG_HIGHMEM
@@ -198,11 +218,9 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
 	unsigned long x = 0;
 
 	for_each_node_state(node, N_HIGH_MEMORY) {
-		struct zone *z =
-			&NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
+		struct zone *z = &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
 
-		x += zone_page_state(z, NR_FREE_PAGES) +
-		     zone_reclaimable_pages(z) - z->dirty_balance_reserve;
+		x += zone_dirtyable_memory(z);
 	}
 	/*
 	 * Unreclaimable memory (kernel memory or anonymous memory
@@ -238,9 +256,12 @@ static unsigned long global_dirtyable_memory(void)
 {
 	unsigned long x;
 
-	x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
+	x = global_page_state(NR_FREE_PAGES);
 	x -= min(x, dirty_balance_reserve);
 
+	x += global_page_state(NR_INACTIVE_FILE);
+	x += global_page_state(NR_ACTIVE_FILE);
+
 	if (!vm_highmem_is_dirtyable)
 		x -= highmem_dirtyable_memory(x);
 
@@ -288,32 +309,6 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
 	trace_global_dirty_state(background, dirty);
 }
 
-/**
- * zone_dirtyable_memory - number of dirtyable pages in a zone
- * @zone: the zone
- *
- * Returns the zone's number of pages potentially available for dirty
- * page cache.  This is the base value for the per-zone dirty limits.
- */
-static unsigned long zone_dirtyable_memory(struct zone *zone)
-{
-	/*
-	 * The effective global number of dirtyable pages may exclude
-	 * highmem as a big-picture measure to keep the ratio between
-	 * dirty memory and lowmem reasonable.
-	 *
-	 * But this function is purely about the individual zone and a
-	 * highmem zone can hold its share of dirty pages, so we don't
-	 * care about vm_highmem_is_dirtyable here.
-	 */
-	unsigned long nr_pages = zone_page_state(zone, NR_FREE_PAGES) +
-		zone_reclaimable_pages(zone);
-
-	/* don't allow this to underflow */
-	nr_pages -= min(nr_pages, zone->dirty_balance_reserve);
-	return nr_pages;
-}
-
 /**
  * zone_dirty_limit - maximum number of dirty pages allowed in a zone
  * @zone: the zone

mm/readahead.c

@@ -211,8 +211,6 @@ __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
 int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
 		pgoff_t offset, unsigned long nr_to_read)
 {
-	int ret = 0;
-
 	if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages))
 		return -EINVAL;
 
@@ -226,15 +224,13 @@ int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
 			this_chunk = nr_to_read;
 		err = __do_page_cache_readahead(mapping, filp,
 						offset, this_chunk, 0);
-		if (err < 0) {
-			ret = err;
-			break;
-		}
-		ret += err;
+		if (err < 0)
+			return err;
+
 		offset += this_chunk;
 		nr_to_read -= this_chunk;
 	}
-	return ret;
+	return 0;
 }
 
 /*
@@ -576,8 +572,7 @@ do_readahead(struct address_space *mapping, struct file *filp,
 	if (!mapping || !mapping->a_ops)
 		return -EINVAL;
 
-	force_page_cache_readahead(mapping, filp, index, nr);
-	return 0;
+	return force_page_cache_readahead(mapping, filp, index, nr);
 }
 
 SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count)

mm/slab_common.c

@@ -233,14 +233,17 @@ kmem_cache_create_memcg(struct mem_cgroup *memcg, const char *name, size_t size,
 	mutex_unlock(&slab_mutex);
 	put_online_cpus();
 
-	/*
-	 * There is no point in flooding logs with warnings or especially
-	 * crashing the system if we fail to create a cache for a memcg. In
-	 * this case we will be accounting the memcg allocation to the root
-	 * cgroup until we succeed to create its own cache, but it isn't that
-	 * critical.
-	 */
-	if (err && !memcg) {
+	if (err) {
+		/*
+		 * There is no point in flooding logs with warnings or
+		 * especially crashing the system if we fail to create a cache
+		 * for a memcg. In this case we will be accounting the memcg
+		 * allocation to the root cgroup until we succeed to create its
+		 * own cache, but it isn't that critical.
+		 */
+		if (!memcg)
+			return NULL;
+
 		if (flags & SLAB_PANIC)
 			panic("kmem_cache_create: Failed to create slab '%s'. Error %d\n",
 				name, err);

mm/slub.c

@@ -1559,7 +1559,7 @@ static inline void *acquire_slab(struct kmem_cache *s,
 		new.freelist = freelist;
 	}
 
-	VM_BUG_ON_PAGE(new.frozen, &new);
+	VM_BUG_ON(new.frozen);
 	new.frozen = 1;
 
 	if (!__cmpxchg_double_slab(s, page,
@@ -1812,7 +1812,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page,
 			set_freepointer(s, freelist, prior);
 			new.counters = counters;
 			new.inuse--;
-			VM_BUG_ON_PAGE(!new.frozen, &new);
+			VM_BUG_ON(!new.frozen);
 
 		} while (!__cmpxchg_double_slab(s, page,
 			prior, counters,
@@ -1840,7 +1840,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page,
 
 	old.freelist = page->freelist;
 	old.counters = page->counters;
-	VM_BUG_ON_PAGE(!old.frozen, &old);
+	VM_BUG_ON(!old.frozen);
 
 	/* Determine target state of the slab */
 	new.counters = old.counters;
@@ -1952,7 +1952,7 @@ static void unfreeze_partials(struct kmem_cache *s,
 
 			old.freelist = page->freelist;
 			old.counters = page->counters;
-			VM_BUG_ON_PAGE(!old.frozen, &old);
+			VM_BUG_ON(!old.frozen);
 
 			new.counters = old.counters;
 			new.freelist = old.freelist;
@@ -2225,7 +2225,7 @@ static inline void *get_freelist(struct kmem_cache *s, struct page *page)
 		counters = page->counters;
 
 		new.counters = counters;
-		VM_BUG_ON_PAGE(!new.frozen, &new);
+		VM_BUG_ON(!new.frozen);
 
 		new.inuse = page->objects;
 		new.frozen = freelist != NULL;
@@ -2319,7 +2319,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
 	 * page is pointing to the page from which the objects are obtained.
 	 * That page must be frozen for per cpu allocations to work.
 	 */
-	VM_BUG_ON_PAGE(!c->page->frozen, c->page);
+	VM_BUG_ON(!c->page->frozen);
 	c->freelist = get_freepointer(s, freelist);
 	c->tid = next_tid(c->tid);
 	local_irq_restore(flags);

mm/vmscan.c

@@ -147,7 +147,7 @@ static bool global_reclaim(struct scan_control *sc)
 }
 #endif
 
-unsigned long zone_reclaimable_pages(struct zone *zone)
+static unsigned long zone_reclaimable_pages(struct zone *zone)
 {
 	int nr;
 
@@ -3315,27 +3315,6 @@ void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx)
 	wake_up_interruptible(&pgdat->kswapd_wait);
 }
 
-/*
- * The reclaimable count would be mostly accurate.
- * The less reclaimable pages may be
- * - mlocked pages, which will be moved to unevictable list when encountered
- * - mapped pages, which may require several travels to be reclaimed
- * - dirty pages, which is not "instantly" reclaimable
- */
-unsigned long global_reclaimable_pages(void)
-{
-	int nr;
-
-	nr = global_page_state(NR_ACTIVE_FILE) +
-	     global_page_state(NR_INACTIVE_FILE);
-
-	if (get_nr_swap_pages() > 0)
-		nr += global_page_state(NR_ACTIVE_ANON) +
-		      global_page_state(NR_INACTIVE_ANON);
-
-	return nr;
-}
-
 #ifdef CONFIG_HIBERNATION
 /*
  * Try to free `nr_to_reclaim' of memory, system-wide, and return the number of