24 files changed, 271 insertions, 147 deletions

diff --git a/.gitignore b/.gitignore
index 3b8b9b33be38..7e9932e55475 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,6 +29,7 @@ modules.builtin
 *.bz2
 *.lzma
 *.xz
+*.lz4
 *.lzo
 *.patch
 *.gcno
diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
index cbfdf5486639..fe397f90a34f 100644
--- a/Documentation/DocBook/device-drivers.tmpl
+++ b/Documentation/DocBook/device-drivers.tmpl
@@ -84,7 +84,7 @@ X!Iinclude/linux/kobject.h
 
      <sect1><title>Kernel utility functions</title>
 !Iinclude/linux/kernel.h
-!Ekernel/printk.c
+!Ekernel/printk/printk.c
 !Ekernel/panic.c
 !Ekernel/sys.c
 !Ekernel/rcupdate.c
diff --git a/MAINTAINERS b/MAINTAINERS
index a26b10e52aea..d83f70ffdbed 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2871,7 +2871,7 @@ F:	drivers/media/usb/dvb-usb-v2/dvb_usb*
 F:      drivers/media/usb/dvb-usb-v2/usb_urb.c
 
 DYNAMIC DEBUG
-M:      Jason Baron <jbaron@redhat.com>
+M:      Jason Baron <jbaron@akamai.com>
 S:      Maintained
 F:      lib/dynamic_debug.c
 F:      include/linux/dynamic_debug.h
diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index 643b8b5eee86..8244f5ec2f4c 100644
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/irq.h>
 #include <linux/module.h>
+#include <linux/reboot.h>
 #include <linux/serial_reg.h>
 #include <linux/serial_8250.h>
 #include <linux/reboot.h>
diff --git a/drivers/accessibility/braille/braille_console.c b/drivers/accessibility/braille/braille_console.c
index d21167bfc865..dc34a5b8bcee 100644
--- a/drivers/accessibility/braille/braille_console.c
+++ b/drivers/accessibility/braille/braille_console.c
@@ -359,6 +359,9 @@ int braille_register_console(struct console *console, int index,
                 char *console_options, char *braille_options)
 {
         int ret;
+
+        if (!(console->flags & CON_BRL))
+                return 0;
         if (!console_options)
                 /* Only support VisioBraille for now */
                 console_options = "57600o8";
@@ -374,15 +377,17 @@ int braille_register_console(struct console *console, int index,
         braille_co = console;
         register_keyboard_notifier(&keyboard_notifier_block);
         register_vt_notifier(&vt_notifier_block);
-        return 0;
+        return 1;
 }
 
 int braille_unregister_console(struct console *console)
 {
         if (braille_co != console)
                 return -EINVAL;
+        if (!(console->flags & CON_BRL))
+                return 0;
         unregister_keyboard_notifier(&keyboard_notifier_block);
         unregister_vt_notifier(&vt_notifier_block);
         braille_co = NULL;
-        return 0;
+        return 1;
 }
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index eb760a218da4..232fa8fce26a 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -419,6 +419,13 @@ static void __init dmi_format_ids(char *buf, size_t len)
                             dmi_get_system_info(DMI_BIOS_DATE));
 }
 
+/*
+ * Check for DMI/SMBIOS headers in the system firmware image.  Any
+ * SMBIOS header must start 16 bytes before the DMI header, so take a
+ * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset
+ * 0.  If the DMI header is present, set dmi_ver accordingly (SMBIOS
+ * takes precedence) and return 0.  Otherwise return 1.
+ */
 static int __init dmi_present(const u8 *buf)
 {
         int smbios_ver;
@@ -506,6 +513,13 @@ void __init dmi_scan_machine(void)
                 if (p == NULL)
                         goto error;
 
+                /*
+                 * Iterate over all possible DMI header addresses q.
+                 * Maintain the 32 bytes around q in buf.  On the
+                 * first iteration, substitute zero for the
+                 * out-of-range bytes so there is no chance of falsely
+                 * detecting an SMBIOS header.
+                 */
                 memset(buf, 0, 16);
                 for (q = p; q < p + 0x10000; q += 16) {
                         memcpy_fromio(buf + 16, q, 16);
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index f4f30af2df68..2e8a20cac588 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -1715,11 +1715,13 @@ int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops)
                     (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops))
                         port->nscan = NULL;
 
-        list_for_each_entry(scan, &rio_scans, node)
+        list_for_each_entry(scan, &rio_scans, node) {
                 if (scan->mport_id == mport_id) {
                         list_del(&scan->node);
                         kfree(scan);
+                        break;
                 }
+        }
 
         mutex_unlock(&rio_mport_list_lock);
 
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 02faf3c4e0d5..c2e80d7ca5e2 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -524,6 +524,8 @@ static int twl_rtc_probe(struct platform_device *pdev)
         if (ret < 0)
                 goto out1;
 
+        device_init_wakeup(&pdev->dev, 1);
+
         rtc = rtc_device_register(pdev->name,
                                   &pdev->dev, &twl_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
@@ -542,7 +544,6 @@ static int twl_rtc_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, rtc);
-        device_init_wakeup(&pdev->dev, 1);
         return 0;
 
 out2:
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 998b17eda09d..9f6b96a09615 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -2965,6 +2965,11 @@ int ocfs2_duplicate_clusters_by_page(handle_t *handle,
                         to = map_end & (PAGE_CACHE_SIZE - 1);
 
                 page = find_or_create_page(mapping, page_index, GFP_NOFS);
+                if (!page) {
+                        ret = -ENOMEM;
+                        mlog_errno(ret);
+                        break;
+                }
 
                 /*
                  * In case PAGE_CACHE_SIZE <= CLUSTER_SIZE, This page
diff --git a/include/linux/vmpressure.h b/include/linux/vmpressure.h
index 76be077340ea..7dc17e2456de 100644
--- a/include/linux/vmpressure.h
+++ b/include/linux/vmpressure.h
@@ -12,7 +12,7 @@ struct vmpressure {
         unsigned long scanned;
         unsigned long reclaimed;
         /* The lock is used to keep the scanned/reclaimed above in sync. */
-        struct mutex sr_lock;
+        struct spinlock sr_lock;
 
         /* The list of vmpressure_event structs. */
         struct list_head events;
@@ -30,6 +30,7 @@ extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
 extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
 
 extern void vmpressure_init(struct vmpressure *vmpr);
+extern void vmpressure_cleanup(struct vmpressure *vmpr);
 extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
 extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
 extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css);
diff --git a/kernel/Makefile b/kernel/Makefile
index 470839d1a30e..35ef1185e359 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the linux kernel.
 #
 
-obj-y     = fork.o exec_domain.o panic.o printk.o \
+obj-y     = fork.o exec_domain.o panic.o \
             cpu.o exit.o itimer.o time.o softirq.o resource.o \
             sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
             signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
@@ -24,6 +24,7 @@ endif
 
 obj-y += sched/
 obj-y += power/
+obj-y += printk/
 obj-y += cpu/
 
 obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
diff --git a/kernel/printk/Makefile b/kernel/printk/Makefile
new file mode 100644
index 000000000000..85405bdcf2b3
--- /dev/null
+++ b/kernel/printk/Makefile
@@ -0,0 +1,2 @@
+obj-y   = printk.o
+obj-$(CONFIG_A11Y_BRAILLE_CONSOLE)      += braille.o
diff --git a/kernel/printk/braille.c b/kernel/printk/braille.c
new file mode 100644
index 000000000000..b51087fb9ace
--- /dev/null
+++ b/kernel/printk/braille.c
@@ -0,0 +1,48 @@
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/string.h>
+
+#include "console_cmdline.h"
+#include "braille.h"
+
+char *_braille_console_setup(char **str, char **brl_options)
+{
+        if (!memcmp(*str, "brl,", 4)) {
+                *brl_options = "";
+                *str += 4;
+        } else if (!memcmp(str, "brl=", 4)) {
+                *brl_options = *str + 4;
+                *str = strchr(*brl_options, ',');
+                if (!*str)
+                        pr_err("need port name after brl=\n");
+                else
+                        *((*str)++) = 0;
+        }
+
+        return *str;
+}
+
+int
+_braille_register_console(struct console *console, struct console_cmdline *c)
+{
+        int rtn = 0;
+
+        if (c->brl_options) {
+                console->flags |= CON_BRL;
+                rtn = braille_register_console(console, c->index, c->options,
+                                               c->brl_options);
+        }
+
+        return rtn;
+}
+
+int
+_braille_unregister_console(struct console *console)
+{
+        if (console->flags & CON_BRL)
+                return braille_unregister_console(console);
+
+        return 0;
+}
diff --git a/kernel/printk/braille.h b/kernel/printk/braille.h
new file mode 100644
index 000000000000..769d771145c8
--- /dev/null
+++ b/kernel/printk/braille.h
@@ -0,0 +1,48 @@
+#ifndef _PRINTK_BRAILLE_H
+#define _PRINTK_BRAILLE_H
+
+#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
+
+static inline void
+braille_set_options(struct console_cmdline *c, char *brl_options)
+{
+        c->brl_options = brl_options;
+}
+
+char *
+_braille_console_setup(char **str, char **brl_options);
+
+int
+_braille_register_console(struct console *console, struct console_cmdline *c);
+
+int
+_braille_unregister_console(struct console *console);
+
+#else
+
+static inline void
+braille_set_options(struct console_cmdline *c, char *brl_options)
+{
+}
+
+static inline char *
+_braille_console_setup(char **str, char **brl_options)
+{
+        return NULL;
+}
+
+static inline int
+_braille_register_console(struct console *console, struct console_cmdline *c)
+{
+        return 0;
+}
+
+static inline int
+_braille_unregister_console(struct console *console)
+{
+        return 0;
+}
+
+#endif
+
+#endif
diff --git a/kernel/printk/console_cmdline.h b/kernel/printk/console_cmdline.h
new file mode 100644
index 000000000000..cbd69d842341
--- /dev/null
+++ b/kernel/printk/console_cmdline.h
@@ -0,0 +1,14 @@
+#ifndef _CONSOLE_CMDLINE_H
+#define _CONSOLE_CMDLINE_H
+
+struct console_cmdline
+{
+        char    name[8];                        /* Name of the driver       */
+        int     index;                          /* Minor dev. to use        */
+        char    *options;                       /* Options for the driver   */
+#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
+        char    *brl_options;                   /* Options for braille driver */
+#endif
+};
+
+#endif
diff --git a/kernel/printk.c b/kernel/printk/printk.c
index 69b0890ed7e5..5b5a7080e2a5 100644
--- a/kernel/printk.c
+++ b/kernel/printk/printk.c
@@ -51,6 +51,9 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/printk.h>
 
+#include "console_cmdline.h"
+#include "braille.h"
+
 /* printk's without a loglevel use this.. */
 #define DEFAULT_MESSAGE_LOGLEVEL CONFIG_DEFAULT_MESSAGE_LOGLEVEL
 
@@ -105,19 +108,11 @@ static struct console *exclusive_console;
 /*
  *      Array of consoles built from command line options (console=)
  */
-struct console_cmdline
-{
-        char    name[8];                        /* Name of the driver       */
-        int     index;                          /* Minor dev. to use        */
-        char    *options;                       /* Options for the driver   */
-#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
-        char    *brl_options;                   /* Options for braille driver */
-#endif
-};
 
 #define MAX_CMDLINECONSOLES 8
 
 static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
+
 static int selected_console = -1;
 static int preferred_console = -1;
 int console_set_on_cmdline;
@@ -178,7 +173,7 @@ static int console_may_schedule;
  *         67                           "g"
  *   0032     00 00 00                  padding to next message header
  *
- * The 'struct log' buffer header must never be directly exported to
+ * The 'struct printk_log' buffer header must never be directly exported to
  * userspace, it is a kernel-private implementation detail that might
  * need to be changed in the future, when the requirements change.
  *
@@ -200,7 +195,7 @@ enum log_flags {
         LOG_CONT        = 8,    /* text is a fragment of a continuation line */
 };
 
-struct log {
+struct printk_log {
         u64 ts_nsec;            /* timestamp in nanoseconds */
         u16 len;                /* length of entire record */
         u16 text_len;           /* length of text buffer */
@@ -248,7 +243,7 @@ static u32 clear_idx;
 #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
 #define LOG_ALIGN 4
 #else
-#define LOG_ALIGN __alignof__(struct log)
+#define LOG_ALIGN __alignof__(struct printk_log)
 #endif
 #define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT)
 static char __log_buf[__LOG_BUF_LEN] __aligned(LOG_ALIGN);
@@ -259,35 +254,35 @@ static u32 log_buf_len = __LOG_BUF_LEN;
 static volatile unsigned int logbuf_cpu = UINT_MAX;
 
 /* human readable text of the record */
-static char *log_text(const struct log *msg)
+static char *log_text(const struct printk_log *msg)
 {
-        return (char *)msg + sizeof(struct log);
+        return (char *)msg + sizeof(struct printk_log);
 }
 
 /* optional key/value pair dictionary attached to the record */
-static char *log_dict(const struct log *msg)
+static char *log_dict(const struct printk_log *msg)
 {
-        return (char *)msg + sizeof(struct log) + msg->text_len;
+        return (char *)msg + sizeof(struct printk_log) + msg->text_len;
 }
 
 /* get record by index; idx must point to valid msg */
-static struct log *log_from_idx(u32 idx)
+static struct printk_log *log_from_idx(u32 idx)
 {
-        struct log *msg = (struct log *)(log_buf + idx);
+        struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 
         /*
          * A length == 0 record is the end of buffer marker. Wrap around and
          * read the message at the start of the buffer.
          */
         if (!msg->len)
-                return (struct log *)log_buf;
+                return (struct printk_log *)log_buf;
         return msg;
 }
 
 /* get next record; idx must point to valid msg */
 static u32 log_next(u32 idx)
 {
-        struct log *msg = (struct log *)(log_buf + idx);
+        struct printk_log *msg = (struct printk_log *)(log_buf + idx);
 
         /* length == 0 indicates the end of the buffer; wrap */
         /*
@@ -296,7 +291,7 @@ static u32 log_next(u32 idx)
          * return the one after that.
          */
         if (!msg->len) {
-                msg = (struct log *)log_buf;
+                msg = (struct printk_log *)log_buf;
                 return msg->len;
         }
         return idx + msg->len;
@@ -308,11 +303,11 @@ static void log_store(int facility, int level,
                       const char *dict, u16 dict_len,
                       const char *text, u16 text_len)
 {
-        struct log *msg;
+        struct printk_log *msg;
         u32 size, pad_len;
 
         /* number of '\0' padding bytes to next message */
-        size = sizeof(struct log) + text_len + dict_len;
+        size = sizeof(struct printk_log) + text_len + dict_len;
         pad_len = (-size) & (LOG_ALIGN - 1);
         size += pad_len;
 
@@ -324,7 +319,7 @@ static void log_store(int facility, int level,
                 else
                         free = log_first_idx - log_next_idx;
 
-                if (free > size + sizeof(struct log))
+                if (free > size + sizeof(struct printk_log))
                         break;
 
                 /* drop old messages until we have enough contiuous space */
@@ -332,18 +327,18 @@ static void log_store(int facility, int level,
                 log_first_seq++;
         }
 
-        if (log_next_idx + size + sizeof(struct log) >= log_buf_len) {
+        if (log_next_idx + size + sizeof(struct printk_log) >= log_buf_len) {
                 /*
                  * This message + an additional empty header does not fit
                  * at the end of the buffer. Add an empty header with len == 0
                  * to signify a wrap around.
                  */
-                memset(log_buf + log_next_idx, 0, sizeof(struct log));
+                memset(log_buf + log_next_idx, 0, sizeof(struct printk_log));
                 log_next_idx = 0;
         }
 
         /* fill message */
-        msg = (struct log *)(log_buf + log_next_idx);
+        msg = (struct printk_log *)(log_buf + log_next_idx);
         memcpy(log_text(msg), text, text_len);
         msg->text_len = text_len;
         memcpy(log_dict(msg), dict, dict_len);
@@ -356,7 +351,7 @@ static void log_store(int facility, int level,
         else
                 msg->ts_nsec = local_clock();
         memset(log_dict(msg) + dict_len, 0, pad_len);
-        msg->len = sizeof(struct log) + text_len + dict_len + pad_len;
+        msg->len = sizeof(struct printk_log) + text_len + dict_len + pad_len;
 
         /* insert message */
         log_next_idx += msg->len;
@@ -479,7 +474,7 @@ static ssize_t devkmsg_read(struct file *file, char __user *buf,
                             size_t count, loff_t *ppos)
 {
         struct devkmsg_user *user = file->private_data;
-        struct log *msg;
+        struct printk_log *msg;
         u64 ts_usec;
         size_t i;
         char cont = '-';
@@ -724,14 +719,14 @@ void log_buf_kexec_setup(void)
         VMCOREINFO_SYMBOL(log_first_idx);
         VMCOREINFO_SYMBOL(log_next_idx);
         /*
-         * Export struct log size and field offsets. User space tools can
+         * Export struct printk_log size and field offsets. User space tools can
          * parse it and detect any changes to structure down the line.
          */
-        VMCOREINFO_STRUCT_SIZE(log);
-        VMCOREINFO_OFFSET(log, ts_nsec);
-        VMCOREINFO_OFFSET(log, len);
-        VMCOREINFO_OFFSET(log, text_len);
-        VMCOREINFO_OFFSET(log, dict_len);
+        VMCOREINFO_STRUCT_SIZE(printk_log);
+        VMCOREINFO_OFFSET(printk_log, ts_nsec);
+        VMCOREINFO_OFFSET(printk_log, len);
+        VMCOREINFO_OFFSET(printk_log, text_len);
+        VMCOREINFO_OFFSET(printk_log, dict_len);
 }
 #endif
 
@@ -884,7 +879,7 @@ static size_t print_time(u64 ts, char *buf)
                        (unsigned long)ts, rem_nsec / 1000);
 }
 
-static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
+static size_t print_prefix(const struct printk_log *msg, bool syslog, char *buf)
 {
         size_t len = 0;
         unsigned int prefix = (msg->facility << 3) | msg->level;
@@ -907,7 +902,7 @@ static size_t print_prefix(const struct log *msg, bool syslog, char *buf)
         return len;
 }
 
-static size_t msg_print_text(const struct log *msg, enum log_flags prev,
+static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
                              bool syslog, char *buf, size_t size)
 {
         const char *text = log_text(msg);
@@ -969,7 +964,7 @@ static size_t msg_print_text(const struct log *msg, enum log_flags prev,
 static int syslog_print(char __user *buf, int size)
 {
         char *text;
-        struct log *msg;
+        struct printk_log *msg;
         int len = 0;
 
         text = kmalloc(LOG_LINE_MAX + PREFIX_MAX, GFP_KERNEL);
@@ -1060,7 +1055,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                 idx = clear_idx;
                 prev = 0;
                 while (seq < log_next_seq) {
-                        struct log *msg = log_from_idx(idx);
+                        struct printk_log *msg = log_from_idx(idx);
 
                         len += msg_print_text(msg, prev, true, NULL, 0);
                         prev = msg->flags;
@@ -1073,7 +1068,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                 idx = clear_idx;
                 prev = 0;
                 while (len > size && seq < log_next_seq) {
-                        struct log *msg = log_from_idx(idx);
+                        struct printk_log *msg = log_from_idx(idx);
 
                         len -= msg_print_text(msg, prev, true, NULL, 0);
                         prev = msg->flags;
@@ -1087,7 +1082,7 @@ static int syslog_print_all(char __user *buf, int size, bool clear)
                 len = 0;
                 prev = 0;
                 while (len >= 0 && seq < next_seq) {
-                        struct log *msg = log_from_idx(idx);
+                        struct printk_log *msg = log_from_idx(idx);
                         int textlen;
 
                         textlen = msg_print_text(msg, prev, true, text,
@@ -1233,7 +1228,7 @@ int do_syslog(int type, char __user *buf, int len, bool from_file)
 
                         error = 0;
                         while (seq < log_next_seq) {
-                                struct log *msg = log_from_idx(idx);
+                                struct printk_log *msg = log_from_idx(idx);
 
                                 error += msg_print_text(msg, prev, true, NULL, 0);
                                 idx = log_next(idx);
@@ -1719,10 +1714,10 @@ static struct cont {
         u8 level;
         bool flushed:1;
 } cont;
-static struct log *log_from_idx(u32 idx) { return NULL; }
+static struct printk_log *log_from_idx(u32 idx) { return NULL; }
 static u32 log_next(u32 idx) { return 0; }
 static void call_console_drivers(int level, const char *text, size_t len) {}
-static size_t msg_print_text(const struct log *msg, enum log_flags prev,
+static size_t msg_print_text(const struct printk_log *msg, enum log_flags prev,
                              bool syslog, char *buf, size_t size) { return 0; }
 static size_t cont_print_text(char *text, size_t size) { return 0; }
 
@@ -1761,23 +1756,23 @@ static int __add_preferred_console(char *name, int idx, char *options,
          *      See if this tty is not yet registered, and
          *      if we have a slot free.
          */
-        for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++)
-                if (strcmp(console_cmdline[i].name, name) == 0 &&
-                          console_cmdline[i].index == idx) {
-                                if (!brl_options)
-                                        selected_console = i;
-                                return 0;
+        for (i = 0, c = console_cmdline;
+             i < MAX_CMDLINECONSOLES && c->name[0];
+             i++, c++) {
+                if (strcmp(c->name, name) == 0 && c->index == idx) {
+                        if (!brl_options)
+                                selected_console = i;
+                        return 0;
                 }
+        }
         if (i == MAX_CMDLINECONSOLES)
                 return -E2BIG;
         if (!brl_options)
                 selected_console = i;
-        c = &console_cmdline[i];
         strlcpy(c->name, name, sizeof(c->name));
         c->options = options;
-#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
-        c->brl_options = brl_options;
-#endif
+        braille_set_options(c, brl_options);
+
         c->index = idx;
         return 0;
 }
@@ -1790,20 +1785,8 @@ static int __init console_setup(char *str)
         char *s, *options, *brl_options = NULL;
         int idx;
 
-#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
-        if (!memcmp(str, "brl,", 4)) {
-                brl_options = "";
-                str += 4;
-        } else if (!memcmp(str, "brl=", 4)) {
-                brl_options = str + 4;
-                str = strchr(brl_options, ',');
-                if (!str) {
-                        printk(KERN_ERR "need port name after brl=\n");
-                        return 1;
-                }
-                *(str++) = 0;
-        }
-#endif
+        if (_braille_console_setup(&str, &brl_options))
+                return 1;
 
         /*
          * Decode str into name, index, options.
@@ -1858,15 +1841,15 @@ int update_console_cmdline(char *name, int idx, char *name_new, int idx_new, cha
         struct console_cmdline *c;
         int i;
 
-        for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++)
-                if (strcmp(console_cmdline[i].name, name) == 0 &&
-                          console_cmdline[i].index == idx) {
-                                c = &console_cmdline[i];
-                                strlcpy(c->name, name_new, sizeof(c->name));
-                                c->name[sizeof(c->name) - 1] = 0;
-                                c->options = options;
-                                c->index = idx_new;
-                                return i;
+        for (i = 0, c = console_cmdline;
+             i < MAX_CMDLINECONSOLES && c->name[0];
+             i++, c++)
+                if (strcmp(c->name, name) == 0 && c->index == idx) {
+                        strlcpy(c->name, name_new, sizeof(c->name));
+                        c->name[sizeof(c->name) - 1] = 0;
+                        c->options = options;
+                        c->index = idx_new;
+                        return i;
                 }
         /* not found */
         return -1;
@@ -2046,7 +2029,7 @@ void console_unlock(void)
         console_cont_flush(text, sizeof(text));
 again:
         for (;;) {
-                struct log *msg;
+                struct printk_log *msg;
                 size_t len;
                 int level;
 
@@ -2241,6 +2224,7 @@ void register_console(struct console *newcon)
         int i;
         unsigned long flags;
         struct console *bcon = NULL;
+        struct console_cmdline *c;
 
         /*
          * before we register a new CON_BOOT console, make sure we don't
@@ -2288,30 +2272,25 @@ void register_console(struct console *newcon)
          *      See if this console matches one we selected on
          *      the command line.
          */
-        for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0];
-                        i++) {
-                if (strcmp(console_cmdline[i].name, newcon->name) != 0)
+        for (i = 0, c = console_cmdline;
+             i < MAX_CMDLINECONSOLES && c->name[0];
+             i++, c++) {
+                if (strcmp(c->name, newcon->name) != 0)
                         continue;
                 if (newcon->index >= 0 &&
-                    newcon->index != console_cmdline[i].index)
+                    newcon->index != c->index)
                         continue;
                 if (newcon->index < 0)
-                        newcon->index = console_cmdline[i].index;
-#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
-                if (console_cmdline[i].brl_options) {
-                        newcon->flags |= CON_BRL;
-                        braille_register_console(newcon,
-                                        console_cmdline[i].index,
-                                        console_cmdline[i].options,
-                                        console_cmdline[i].brl_options);
+                        newcon->index = c->index;
+
+                if (_braille_register_console(newcon, c))
                         return;
-                }
-#endif
+
                 if (newcon->setup &&
                     newcon->setup(newcon, console_cmdline[i].options) != 0)
                         break;
                 newcon->flags |= CON_ENABLED;
-                newcon->index = console_cmdline[i].index;
+                newcon->index = c->index;
                 if (i == selected_console) {
                         newcon->flags |= CON_CONSDEV;
                         preferred_console = selected_console;
@@ -2394,13 +2373,13 @@ EXPORT_SYMBOL(register_console);
 int unregister_console(struct console *console)
 {
         struct console *a, *b;
-        int res = 1;
+        int res;
 
-#ifdef CONFIG_A11Y_BRAILLE_CONSOLE
-        if (console->flags & CON_BRL)
-                return braille_unregister_console(console);
-#endif
+        res = _braille_unregister_console(console);
+        if (res)
+                return res;
 
+        res = 1;
         console_lock();
         if (console_drivers == console) {
                 console_drivers=console->next;
@@ -2666,7 +2645,7 @@ void kmsg_dump(enum kmsg_dump_reason reason)
 bool kmsg_dump_get_line_nolock(struct kmsg_dumper *dumper, bool syslog,
                                char *line, size_t size, size_t *len)
 {
-        struct log *msg;
+        struct printk_log *msg;
         size_t l = 0;
         bool ret = false;
 
@@ -2778,7 +2757,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
         idx = dumper->cur_idx;
         prev = 0;
         while (seq < dumper->next_seq) {
-                struct log *msg = log_from_idx(idx);
+                struct printk_log *msg = log_from_idx(idx);
 
                 l += msg_print_text(msg, prev, true, NULL, 0);
                 idx = log_next(idx);
@@ -2791,7 +2770,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
         idx = dumper->cur_idx;
         prev = 0;
         while (l > size && seq < dumper->next_seq) {
-                struct log *msg = log_from_idx(idx);
+                struct printk_log *msg = log_from_idx(idx);
 
                 l -= msg_print_text(msg, prev, true, NULL, 0);
                 idx = log_next(idx);
@@ -2806,7 +2785,7 @@ bool kmsg_dump_get_buffer(struct kmsg_dumper *dumper, bool syslog,
         l = 0;
         prev = 0;
         while (seq < dumper->next_seq) {
-                struct log *msg = log_from_idx(idx);
+                struct printk_log *msg = log_from_idx(idx);
 
                 l += msg_print_text(msg, prev, syslog, buf + l, size - l);
                 idx = log_next(idx);
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bb456f44b7b1..9565645e3202 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -851,7 +851,7 @@ void task_numa_fault(int node, int pages, bool migrated)
 {
         struct task_struct *p = current;
 
-        if (!sched_feat_numa(NUMA))
+        if (!numabalancing_enabled)
                 return;
 
         /* FIXME: Allocate task-specific structure for placement policy here */
@@ -5786,7 +5786,7 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
                 entity_tick(cfs_rq, se, queued);
         }
 
-        if (sched_feat_numa(NUMA))
+        if (numabalancing_enabled)
                 task_tick_numa(rq, curr);
 
         update_rq_runnable_avg(rq, 1);
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 243e710c6039..a92012a71702 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1620,7 +1620,9 @@ static void __split_huge_page_refcount(struct page *page,
                                      ((1L << PG_referenced) |
                                       (1L << PG_swapbacked) |
                                       (1L << PG_mlocked) |
-                                      (1L << PG_uptodate)));
+                                      (1L << PG_uptodate) |
+                                      (1L << PG_active) |
+                                      (1L << PG_unevictable)));
                 page_tail->flags |= (1L << PG_dirty);
 
                 /* clear PageTail before overwriting first_page */
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 00a7a664b9c1..c290a1cf3862 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6335,6 +6335,7 @@ static void mem_cgroup_css_offline(struct cgroup *cont)
         mem_cgroup_invalidate_reclaim_iterators(memcg);
         mem_cgroup_reparent_charges(memcg);
         mem_cgroup_destroy_all_caches(memcg);
+        vmpressure_cleanup(&memcg->vmpressure);
 }
 
 static void mem_cgroup_css_free(struct cgroup *cont)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 74310017296e..4baf12e534d1 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -732,7 +732,10 @@ static int mbind_range(struct mm_struct *mm, unsigned long start,
                 if (prev) {
                         vma = prev;
                         next = vma->vm_next;
-                        continue;
+                        if (mpol_equal(vma_policy(vma), new_pol))
+                                continue;
+                        /* vma_merge() joined vma && vma->next, case 8 */
+                        goto replace;
                 }
                 if (vma->vm_start != vmstart) {
                         err = split_vma(vma->vm_mm, vma, vmstart, 1);
@@ -744,6 +747,7 @@ static int mbind_range(struct mm_struct *mm, unsigned long start,
                         if (err)
                                 goto out;
                 }
+ replace:
                 err = vma_replace_policy(vma, new_pol);
                 if (err)
                         goto out;
diff --git a/mm/mmap.c b/mm/mmap.c
index fbad7b091090..1edbaa3136c3 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -865,7 +865,7 @@ again:			remove_next = 1 + (end > next->vm_end);
                 if (next->anon_vma)
                         anon_vma_merge(vma, next);
                 mm->map_count--;
-                vma_set_policy(vma, vma_policy(next));
+                mpol_put(vma_policy(next));
                 kmem_cache_free(vm_area_cachep, next);
                 /*
                  * In mprotect's case 6 (see comments on vma_merge),
diff --git a/mm/swap.c b/mm/swap.c
index 4a1d0d2c52fa..62b78a6e224f 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -512,12 +512,7 @@ EXPORT_SYMBOL(__lru_cache_add);
  */
 void lru_cache_add(struct page *page)
 {
-        if (PageActive(page)) {
-                VM_BUG_ON(PageUnevictable(page));
-        } else if (PageUnevictable(page)) {
-                VM_BUG_ON(PageActive(page));
-        }
-
+        VM_BUG_ON(PageActive(page) && PageUnevictable(page));
         VM_BUG_ON(PageLRU(page));
         __lru_cache_add(page);
 }
@@ -539,6 +534,7 @@ void add_page_to_unevictable_list(struct page *page)
 
         spin_lock_irq(&zone->lru_lock);
         lruvec = mem_cgroup_page_lruvec(page, zone);
+        ClearPageActive(page);
         SetPageUnevictable(page);
         SetPageLRU(page);
         add_page_to_lru_list(page, lruvec, LRU_UNEVICTABLE);
@@ -774,8 +770,6 @@ EXPORT_SYMBOL(__pagevec_release);
 void lru_add_page_tail(struct page *page, struct page *page_tail,
                        struct lruvec *lruvec, struct list_head *list)
 {
-        int uninitialized_var(active);
-        enum lru_list lru;
         const int file = 0;
 
         VM_BUG_ON(!PageHead(page));
@@ -787,20 +781,6 @@ void lru_add_page_tail(struct page *page, struct page *page_tail,
         if (!list)
                 SetPageLRU(page_tail);
 
-        if (page_evictable(page_tail)) {
-                if (PageActive(page)) {
-                        SetPageActive(page_tail);
-                        active = 1;
-                        lru = LRU_ACTIVE_ANON;
-                } else {
-                        active = 0;
-                        lru = LRU_INACTIVE_ANON;
-                }
-        } else {
-                SetPageUnevictable(page_tail);
-                lru = LRU_UNEVICTABLE;
-        }
-
         if (likely(PageLRU(page)))
                 list_add_tail(&page_tail->lru, &page->lru);
         else if (list) {
@@ -816,13 +796,13 @@ void lru_add_page_tail(struct page *page, struct page *page_tail,
                  * Use the standard add function to put page_tail on the list,
                  * but then correct its position so they all end up in order.
                  */
-                add_page_to_lru_list(page_tail, lruvec, lru);
+                add_page_to_lru_list(page_tail, lruvec, page_lru(page_tail));
                 list_head = page_tail->lru.prev;
                 list_move_tail(&page_tail->lru, list_head);
         }
 
         if (!PageUnevictable(page))
-                update_page_reclaim_stat(lruvec, file, active);
+                update_page_reclaim_stat(lruvec, file, PageActive(page_tail));
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
@@ -833,7 +813,6 @@ static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec,
         int active = PageActive(page);
         enum lru_list lru = page_lru(page);
 
-        VM_BUG_ON(PageUnevictable(page));
         VM_BUG_ON(PageLRU(page));
 
         SetPageLRU(page);
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index 736a6011c2c8..0c1e37d829fa 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -180,12 +180,12 @@ static void vmpressure_work_fn(struct work_struct *work)
         if (!vmpr->scanned)
                 return;
 
-        mutex_lock(&vmpr->sr_lock);
+        spin_lock(&vmpr->sr_lock);
         scanned = vmpr->scanned;
         reclaimed = vmpr->reclaimed;
         vmpr->scanned = 0;
         vmpr->reclaimed = 0;
-        mutex_unlock(&vmpr->sr_lock);
+        spin_unlock(&vmpr->sr_lock);
 
         do {
                 if (vmpressure_event(vmpr, scanned, reclaimed))
@@ -240,13 +240,13 @@ void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
         if (!scanned)
                 return;
 
-        mutex_lock(&vmpr->sr_lock);
+        spin_lock(&vmpr->sr_lock);
         vmpr->scanned += scanned;
         vmpr->reclaimed += reclaimed;
         scanned = vmpr->scanned;
-        mutex_unlock(&vmpr->sr_lock);
+        spin_unlock(&vmpr->sr_lock);
 
-        if (scanned < vmpressure_win || work_pending(&vmpr->work))
+        if (scanned < vmpressure_win)
                 return;
         schedule_work(&vmpr->work);
 }
@@ -367,8 +367,24 @@ void vmpressure_unregister_event(struct cgroup *cg, struct cftype *cft,
  */
 void vmpressure_init(struct vmpressure *vmpr)
 {
-        mutex_init(&vmpr->sr_lock);
+        spin_lock_init(&vmpr->sr_lock);
         mutex_init(&vmpr->events_lock);
         INIT_LIST_HEAD(&vmpr->events);
         INIT_WORK(&vmpr->work, vmpressure_work_fn);
 }
+
+/**
+ * vmpressure_cleanup() - shuts down vmpressure control structure
+ * @vmpr:       Structure to be cleaned up
+ *
+ * This function should be called before the structure in which it is
+ * embedded is cleaned up.
+ */
+void vmpressure_cleanup(struct vmpressure *vmpr)
+{
+        /*
+         * Make sure there is no pending work before eventfd infrastructure
+         * goes away.
+         */
+        flush_work(&vmpr->work);
+}
diff --git a/mm/zbud.c b/mm/zbud.c
index 9bb4710e3589..ad1e781284fd 100644
--- a/mm/zbud.c
+++ b/mm/zbud.c
@@ -257,7 +257,7 @@ int zbud_alloc(struct zbud_pool *pool, int size, gfp_t gfp,
 
         if (size <= 0 || gfp & __GFP_HIGHMEM)
                 return -EINVAL;
-        if (size > PAGE_SIZE - ZHDR_SIZE_ALIGNED)
+        if (size > PAGE_SIZE - ZHDR_SIZE_ALIGNED - CHUNK_SIZE)
                 return -ENOSPC;
         chunks = size_to_chunks(size);
         spin_lock(&pool->lock);