Merge branch 'akpm' (Andrew's incoming)

Quoth Andrew:

 - Most of MM.  Still waiting for the poweroc guys to get off their
   butts and review some threaded hugepages patches.

 - alpha

 - vfs bits

 - drivers/misc

 - a few core kerenl tweaks

 - printk() features

 - MAINTAINERS updates

 - backlight merge

 - leds merge

 - various lib/ updates

 - checkpatch updates

* akpm: (127 commits)
  epoll: fix spurious lockdep warnings
  checkpatch: add a --strict check for utf-8 in commit logs
  kernel.h/checkpatch: mark strict_strto<foo> and simple_strto<foo> as obsolete
  llist-return-whether-list-is-empty-before-adding-in-llist_add-fix
  wireless: at76c50x: follow rename pack_hex_byte to hex_byte_pack
  fat: follow rename pack_hex_byte() to hex_byte_pack()
  security: follow rename pack_hex_byte() to hex_byte_pack()
  kgdb: follow rename pack_hex_byte() to hex_byte_pack()
  lib: rename pack_hex_byte() to hex_byte_pack()
  lib/string.c: fix strim() semantics for strings that have only blanks
  lib/idr.c: fix comment for ida_get_new_above()
  lib/percpu_counter.c: enclose hotplug only variables in hotplug ifdef
  lib/bitmap.c: quiet sparse noise about address space
  lib/spinlock_debug.c: print owner on spinlock lockup
  lib/kstrtox: common code between kstrto*() and simple_strto*() functions
  drivers/leds/leds-lp5521.c: check if reset is successful
  leds: turn the blink_timer off before starting to blink
  leds: save the delay values after a successful call to blink_set()
  drivers/leds/leds-gpio.c: use gpio_get_value_cansleep() when initializing
  drivers/leds/leds-lm3530.c: add __devexit_p where needed
  ...

29 files changed, 142 insertions, 152 deletions

diff --git a/fs/Kconfig b/fs/Kconfig
index 9fe0b349f4cd..5f4c45d4aa10 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -109,7 +109,7 @@ source "fs/proc/Kconfig"
 source "fs/sysfs/Kconfig"
 
 config TMPFS
-        bool "Virtual memory file system support (former shm fs)"
+        bool "Tmpfs virtual memory file system support (former shm fs)"
         depends on SHMEM
         help
           Tmpfs is a file system which keeps all files in virtual memory.
diff --git a/fs/aio.c b/fs/aio.c
index e29ec485af25..632b235f4fbe 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1387,13 +1387,13 @@ static ssize_t aio_setup_vectored_rw(int type, struct kiocb *kiocb, bool compat)
                 ret = compat_rw_copy_check_uvector(type,
                                 (struct compat_iovec __user *)kiocb->ki_buf,
                                 kiocb->ki_nbytes, 1, &kiocb->ki_inline_vec,
-                                &kiocb->ki_iovec);
+                                &kiocb->ki_iovec, 1);
         else
 #endif
                 ret = rw_copy_check_uvector(type,
                                 (struct iovec __user *)kiocb->ki_buf,
                                 kiocb->ki_nbytes, 1, &kiocb->ki_inline_vec,
-                                &kiocb->ki_iovec);
+                                &kiocb->ki_iovec, 1);
         if (ret < 0)
                 goto out;
 
diff --git a/fs/buffer.c b/fs/buffer.c
index 936d6035f6e2..70a19745cb61 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -213,13 +213,16 @@ __find_get_block_slow(struct block_device *bdev, sector_t block)
          * elsewhere, don't buffer_error if we had some unmapped buffers
          */
         if (all_mapped) {
+                char b[BDEVNAME_SIZE];
+
                 printk("__find_get_block_slow() failed. "
                         "block=%llu, b_blocknr=%llu\n",
                         (unsigned long long)block,
                         (unsigned long long)bh->b_blocknr);
                 printk("b_state=0x%08lx, b_size=%zu\n",
                         bh->b_state, bh->b_size);
-                printk("device blocksize: %d\n", 1 << bd_inode->i_blkbits);
+                printk("device %s blocksize: %d\n", bdevname(bdev, b),
+                        1 << bd_inode->i_blkbits);
         }
 out_unlock:
         spin_unlock(&bd_mapping->private_lock);
diff --git a/fs/compat.c b/fs/compat.c
index 302e761bd0aa..c98787536bb8 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -546,7 +546,7 @@ out:
 ssize_t compat_rw_copy_check_uvector(int type,
                 const struct compat_iovec __user *uvector, unsigned long nr_segs,
                 unsigned long fast_segs, struct iovec *fast_pointer,
-                struct iovec **ret_pointer)
+                struct iovec **ret_pointer, int check_access)
 {
         compat_ssize_t tot_len;
         struct iovec *iov = *ret_pointer = fast_pointer;
@@ -593,7 +593,8 @@ ssize_t compat_rw_copy_check_uvector(int type,
                 }
                 if (len < 0)    /* size_t not fitting in compat_ssize_t .. */
                         goto out;
-                if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+                if (check_access &&
+                    !access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
                         ret = -EFAULT;
                         goto out;
                 }
@@ -1107,7 +1108,7 @@ static ssize_t compat_do_readv_writev(int type, struct file *file,
                 goto out;
 
         tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
-                                               UIO_FASTIOV, iovstack, &iov);
+                                               UIO_FASTIOV, iovstack, &iov, 1);
         if (tot_len == 0) {
                 ret = 0;
                 goto out;
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index b36c5572b3f3..54481a3b2c79 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -514,7 +514,7 @@ ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
 
 #define ecryptfs_printk(type, fmt, arg...) \
         __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
-__attribute__ ((format(printf, 1, 2)))
+__printf(1, 2)
 void __ecryptfs_printk(const char *fmt, ...);
 
 extern const struct file_operations ecryptfs_main_fops;
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 9026fc91fe3b..828e750af23a 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -70,6 +70,15 @@
  * simultaneous inserts (A into B and B into A) from racing and
  * constructing a cycle without either insert observing that it is
  * going to.
+ * It is necessary to acquire multiple "ep->mtx"es at once in the
+ * case when one epoll fd is added to another. In this case, we
+ * always acquire the locks in the order of nesting (i.e. after
+ * epoll_ctl(e1, EPOLL_CTL_ADD, e2), e1->mtx will always be acquired
+ * before e2->mtx). Since we disallow cycles of epoll file
+ * descriptors, this ensures that the mutexes are well-ordered. In
+ * order to communicate this nesting to lockdep, when walking a tree
+ * of epoll file descriptors, we use the current recursion depth as
+ * the lockdep subkey.
  * It is possible to drop the "ep->mtx" and to use the global
  * mutex "epmutex" (together with "ep->lock") to have it working,
  * but having "ep->mtx" will make the interface more scalable.
@@ -464,13 +473,15 @@ static void ep_unregister_pollwait(struct eventpoll *ep, struct epitem *epi)
  * @ep: Pointer to the epoll private data structure.
  * @sproc: Pointer to the scan callback.
  * @priv: Private opaque data passed to the @sproc callback.
+ * @depth: The current depth of recursive f_op->poll calls.
  *
  * Returns: The same integer error code returned by the @sproc callback.
  */
 static int ep_scan_ready_list(struct eventpoll *ep,
                               int (*sproc)(struct eventpoll *,
                                            struct list_head *, void *),
-                              void *priv)
+                              void *priv,
+                              int depth)
 {
         int error, pwake = 0;
         unsigned long flags;
@@ -481,7 +492,7 @@ static int ep_scan_ready_list(struct eventpoll *ep,
          * We need to lock this because we could be hit by
          * eventpoll_release_file() and epoll_ctl().
          */
-        mutex_lock(&ep->mtx);
+        mutex_lock_nested(&ep->mtx, depth);
 
         /*
          * Steal the ready list, and re-init the original one to the
@@ -670,7 +681,7 @@ static int ep_read_events_proc(struct eventpoll *ep, struct list_head *head,
 
 static int ep_poll_readyevents_proc(void *priv, void *cookie, int call_nests)
 {
-        return ep_scan_ready_list(priv, ep_read_events_proc, NULL);
+        return ep_scan_ready_list(priv, ep_read_events_proc, NULL, call_nests + 1);
 }
 
 static unsigned int ep_eventpoll_poll(struct file *file, poll_table *wait)
@@ -737,7 +748,7 @@ void eventpoll_release_file(struct file *file)
 
                 ep = epi->ep;
                 list_del_init(&epi->fllink);
-                mutex_lock(&ep->mtx);
+                mutex_lock_nested(&ep->mtx, 0);
                 ep_remove(ep, epi);
                 mutex_unlock(&ep->mtx);
         }
@@ -1134,7 +1145,7 @@ static int ep_send_events(struct eventpoll *ep,
         esed.maxevents = maxevents;
         esed.events = events;
 
-        return ep_scan_ready_list(ep, ep_send_events_proc, &esed);
+        return ep_scan_ready_list(ep, ep_send_events_proc, &esed, 0);
 }
 
 static inline struct timespec ep_set_mstimeout(long ms)
@@ -1267,7 +1278,7 @@ static int ep_loop_check_proc(void *priv, void *cookie, int call_nests)
         struct rb_node *rbp;
         struct epitem *epi;
 
-        mutex_lock(&ep->mtx);
+        mutex_lock_nested(&ep->mtx, call_nests + 1);
         for (rbp = rb_first(&ep->rbr); rbp; rbp = rb_next(rbp)) {
                 epi = rb_entry(rbp, struct epitem, rbn);
                 if (unlikely(is_file_epoll(epi->ffd.file))) {
@@ -1409,7 +1420,7 @@ SYSCALL_DEFINE4(epoll_ctl, int, epfd, int, op, int, fd,
         }
 
 
-        mutex_lock(&ep->mtx);
+        mutex_lock_nested(&ep->mtx, 0);
 
         /*
          * Try to lookup the file inside our RB tree, Since we grabbed "mtx"
diff --git a/fs/exec.c b/fs/exec.c
index 25dcbe5fc356..36254645b7cc 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -841,10 +841,6 @@ static int exec_mmap(struct mm_struct *mm)
         tsk->mm = mm;
         tsk->active_mm = mm;
         activate_mm(active_mm, mm);
-        if (old_mm && tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
-                atomic_dec(&old_mm->oom_disable_count);
-                atomic_inc(&tsk->mm->oom_disable_count);
-        }
         task_unlock(tsk);
         arch_pick_mmap_layout(mm);
         if (old_mm) {
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index af9fc89b1b2d..9a4e5e206d08 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -135,10 +135,10 @@ extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long);
 struct dentry *ext2_get_parent(struct dentry *child);
 
 /* super.c */
-extern void ext2_error (struct super_block *, const char *, const char *, ...)
-        __attribute__ ((format (printf, 3, 4)));
-extern void ext2_msg(struct super_block *, const char *, const char *, ...)
-        __attribute__ ((format (printf, 3, 4)));
+extern __printf(3, 4)
+void ext2_error(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void ext2_msg(struct super_block *, const char *, const char *, ...);
 extern void ext2_update_dynamic_rev (struct super_block *sb);
 extern void ext2_write_super (struct super_block *);
 
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index b7d7bd0f066e..cec3145e532c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1878,40 +1878,40 @@ extern int ext4_group_extend(struct super_block *sb,
 extern void *ext4_kvmalloc(size_t size, gfp_t flags);
 extern void *ext4_kvzalloc(size_t size, gfp_t flags);
 extern void ext4_kvfree(void *ptr);
-extern void __ext4_error(struct super_block *, const char *, unsigned int,
-                         const char *, ...)
-        __attribute__ ((format (printf, 4, 5)));
+extern __printf(4, 5)
+void __ext4_error(struct super_block *, const char *, unsigned int,
+                  const char *, ...);
 #define ext4_error(sb, message...)      __ext4_error(sb, __func__,      \
                                                      __LINE__, ## message)
-extern void ext4_error_inode(struct inode *, const char *, unsigned int,
-                             ext4_fsblk_t, const char *, ...)
-        __attribute__ ((format (printf, 5, 6)));
-extern void ext4_error_file(struct file *, const char *, unsigned int,
-                            ext4_fsblk_t, const char *, ...)
-        __attribute__ ((format (printf, 5, 6)));
+extern __printf(5, 6)
+void ext4_error_inode(struct inode *, const char *, unsigned int, ext4_fsblk_t,
+                      const char *, ...);
+extern __printf(5, 6)
+void ext4_error_file(struct file *, const char *, unsigned int, ext4_fsblk_t,
+                     const char *, ...);
 extern void __ext4_std_error(struct super_block *, const char *,
                              unsigned int, int);
-extern void __ext4_abort(struct super_block *, const char *, unsigned int,
-                       const char *, ...)
-        __attribute__ ((format (printf, 4, 5)));
+extern __printf(4, 5)
+void __ext4_abort(struct super_block *, const char *, unsigned int,
+                  const char *, ...);
 #define ext4_abort(sb, message...)      __ext4_abort(sb, __func__, \
                                                        __LINE__, ## message)
-extern void __ext4_warning(struct super_block *, const char *, unsigned int,
-                          const char *, ...)
-        __attribute__ ((format (printf, 4, 5)));
+extern __printf(4, 5)
+void __ext4_warning(struct super_block *, const char *, unsigned int,
+                    const char *, ...);
 #define ext4_warning(sb, message...)    __ext4_warning(sb, __func__, \
                                                        __LINE__, ## message)
-extern void ext4_msg(struct super_block *, const char *, const char *, ...)
-        __attribute__ ((format (printf, 3, 4)));
+extern __printf(3, 4)
+void ext4_msg(struct super_block *, const char *, const char *, ...);
 extern void __dump_mmp_msg(struct super_block *, struct mmp_struct *mmp,
                            const char *, unsigned int, const char *);
 #define dump_mmp_msg(sb, mmp, msg)      __dump_mmp_msg(sb, mmp, __func__, \
                                                        __LINE__, msg)
-extern void __ext4_grp_locked_error(const char *, unsigned int, \
-                                    struct super_block *, ext4_group_t, \
-                                    unsigned long, ext4_fsblk_t, \
-                                    const char *, ...)
-        __attribute__ ((format (printf, 7, 8)));
+extern __printf(7, 8)
+void __ext4_grp_locked_error(const char *, unsigned int,
+                             struct super_block *, ext4_group_t,
+                             unsigned long, ext4_fsblk_t,
+                             const char *, ...);
 #define ext4_grp_locked_error(sb, grp, message...) \
         __ext4_grp_locked_error(__func__, __LINE__, (sb), (grp), ## message)
 extern void ext4_update_dynamic_rev(struct super_block *sb);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 986e2388f031..0defe0bfe019 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1811,8 +1811,12 @@ static int ext4_writepage(struct page *page,
                  * We don't want to do block allocation, so redirty
                  * the page and return.  We may reach here when we do
                  * a journal commit via journal_submit_inode_data_buffers.
-                 * We can also reach here via shrink_page_list
+                 * We can also reach here via shrink_page_list but it
+                 * should never be for direct reclaim so warn if that
+                 * happens
                  */
+                WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) ==
+                                                                PF_MEMALLOC);
                 goto redirty_page;
         }
         if (commit_write)
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 5efbd5d7701a..aca191bd5f8f 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -156,8 +156,8 @@ static int uni16_to_x8(struct super_block *sb, unsigned char *ascii,
                 } else {
                         if (uni_xlate == 1) {
                                 *op++ = ':';
-                                op = pack_hex_byte(op, ec >> 8);
-                                op = pack_hex_byte(op, ec);
+                                op = hex_byte_pack(op, ec >> 8);
+                                op = hex_byte_pack(op, ec);
                                 len -= 5;
                         } else {
                                 *op++ = '?';
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index a5d3853822e0..1510a4d51990 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -326,15 +326,14 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent,
 extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
                             struct inode *i2);
 /* fat/misc.c */
-extern void
-__fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
-        __attribute__ ((format (printf, 3, 4))) __cold;
+extern __printf(3, 4) __cold
+void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...);
 #define fat_fs_error(sb, fmt, args...)          \
         __fat_fs_error(sb, 1, fmt , ## args)
 #define fat_fs_error_ratelimit(sb, fmt, args...) \
         __fat_fs_error(sb, __ratelimit(&MSDOS_SB(sb)->ratelimit), fmt , ## args)
-void fat_msg(struct super_block *sb, const char *level, const char *fmt, ...)
-        __attribute__ ((format (printf, 3, 4))) __cold;
+__printf(3, 4) __cold
+void fat_msg(struct super_block *sb, const char *level, const char *fmt, ...);
 extern int fat_clusters_flush(struct super_block *sb);
 extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
 extern void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec *ts,
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 66707118af25..2553b858a72e 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -201,7 +201,7 @@ int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
 void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
 void gfs2_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
 
-__attribute__ ((format(printf, 2, 3)))
+__printf(2, 3)
 void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
 
 /**
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
index 331b5e234ef3..de946170ebb1 100644
--- a/fs/hpfs/hpfs_fn.h
+++ b/fs/hpfs/hpfs_fn.h
@@ -311,8 +311,8 @@ static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)
 
 /* super.c */
 
-void hpfs_error(struct super_block *, const char *, ...)
-        __attribute__((format (printf, 2, 3)));
+__printf(2, 3)
+void hpfs_error(struct super_block *, const char *, ...);
 int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
 unsigned hpfs_count_one_bitmap(struct super_block *, secno);
 
diff --git a/fs/logfs/logfs.h b/fs/logfs/logfs.h
index f22d108bfa5d..398ecff6e548 100644
--- a/fs/logfs/logfs.h
+++ b/fs/logfs/logfs.h
@@ -618,7 +618,6 @@ static inline int logfs_buf_recover(struct logfs_area *area, u64 ofs,
 struct page *emergency_read_begin(struct address_space *mapping, pgoff_t index);
 void emergency_read_end(struct page *page);
 void logfs_crash_dump(struct super_block *sb);
-void *memchr_inv(const void *s, int c, size_t n);
 int logfs_statfs(struct dentry *dentry, struct kstatfs *stats);
 int logfs_check_ds(struct logfs_disk_super *ds);
 int logfs_write_sb(struct super_block *sb);
diff --git a/fs/logfs/super.c b/fs/logfs/super.c
index ce03a182c771..f2697e4df109 100644
--- a/fs/logfs/super.c
+++ b/fs/logfs/super.c
@@ -91,28 +91,6 @@ void logfs_crash_dump(struct super_block *sb)
 }
 
 /*
- * TODO: move to lib/string.c
- */
-/**
- * memchr_inv - Find a character in an area of memory.
- * @s: The memory area
- * @c: The byte to search for
- * @n: The size of the area.
- *
- * returns the address of the first character other than @c, or %NULL
- * if the whole buffer contains just @c.
- */
-void *memchr_inv(const void *s, int c, size_t n)
-{
-        const unsigned char *p = s;
-        while (n-- != 0)
-                if ((unsigned char)c != *p++)
-                        return (void *)(p - 1);
-
-        return NULL;
-}
-
-/*
  * FIXME: There should be a reserve for root, similar to ext2.
  */
 int logfs_statfs(struct dentry *dentry, struct kstatfs *stats)
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 255d5e1c03b7..3777d138f895 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -276,10 +276,10 @@ int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 /* super.c */
 extern struct inode *nilfs_alloc_inode(struct super_block *);
 extern void nilfs_destroy_inode(struct inode *);
-extern void nilfs_error(struct super_block *, const char *, const char *, ...)
-        __attribute__ ((format (printf, 3, 4)));
-extern void nilfs_warning(struct super_block *, const char *, const char *, ...)
-        __attribute__ ((format (printf, 3, 4)));
+extern __printf(3, 4)
+void nilfs_error(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void nilfs_warning(struct super_block *, const char *, const char *, ...);
 extern struct nilfs_super_block *
 nilfs_read_super_block(struct super_block *, u64, int, struct buffer_head **);
 extern int nilfs_store_magic_and_option(struct super_block *,
diff --git a/fs/ntfs/debug.h b/fs/ntfs/debug.h
index 2142b1c68b61..53c27eaf2307 100644
--- a/fs/ntfs/debug.h
+++ b/fs/ntfs/debug.h
@@ -30,8 +30,9 @@
 
 extern int debug_msgs;
 
-extern void __ntfs_debug(const char *file, int line, const char *function,
-        const char *format, ...) __attribute__ ((format (printf, 4, 5)));
+extern __printf(4, 5)
+void __ntfs_debug(const char *file, int line, const char *function,
+                  const char *format, ...);
 /**
  * ntfs_debug - write a debug level message to syslog
  * @f:          a printf format string containing the message
@@ -52,12 +53,14 @@ extern void ntfs_debug_dump_runlist(const runlist_element *rl);
 
 #endif  /* !DEBUG */
 
-extern void __ntfs_warning(const char *function, const struct super_block *sb,
-                const char *fmt, ...) __attribute__ ((format (printf, 3, 4)));
+extern  __printf(3, 4)
+void __ntfs_warning(const char *function, const struct super_block *sb,
+                    const char *fmt, ...);
 #define ntfs_warning(sb, f, a...)       __ntfs_warning(__func__, sb, f, ##a)
 
-extern void __ntfs_error(const char *function, const struct super_block *sb,
-                const char *fmt, ...) __attribute__ ((format (printf, 3, 4)));
+extern  __printf(3, 4)
+void __ntfs_error(const char *function, const struct super_block *sb,
+                  const char *fmt, ...);
 #define ntfs_error(sb, f, a...)         __ntfs_error(__func__, sb, f, ##a)
 
 #endif /* _LINUX_NTFS_DEBUG_H */
diff --git a/fs/ocfs2/super.h b/fs/ocfs2/super.h
index 40c7de084c10..74ff74cf78fe 100644
--- a/fs/ocfs2/super.h
+++ b/fs/ocfs2/super.h
@@ -31,17 +31,15 @@ extern struct workqueue_struct *ocfs2_wq;
 int ocfs2_publish_get_mount_state(struct ocfs2_super *osb,
                                   int node_num);
 
-void __ocfs2_error(struct super_block *sb,
-                   const char *function,
-                   const char *fmt, ...)
-        __attribute__ ((format (printf, 3, 4)));
+__printf(3, 4)
+void __ocfs2_error(struct super_block *sb, const char *function,
+                   const char *fmt, ...);
 
 #define ocfs2_error(sb, fmt, args...) __ocfs2_error(sb, __PRETTY_FUNCTION__, fmt, ##args)
 
-void __ocfs2_abort(struct super_block *sb,
-                   const char *function,
-                   const char *fmt, ...)
-        __attribute__ ((format (printf, 3, 4)));
+__printf(3, 4)
+void __ocfs2_abort(struct super_block *sb, const char *function,
+                   const char *fmt, ...);
 
 #define ocfs2_abort(sb, fmt, args...) __ocfs2_abort(sb, __PRETTY_FUNCTION__, fmt, ##args)
 
diff --git a/fs/partitions/ldm.c b/fs/partitions/ldm.c
index af9fdf046769..bd8ae788f689 100644
--- a/fs/partitions/ldm.c
+++ b/fs/partitions/ldm.c
@@ -49,18 +49,20 @@
 #define ldm_error(f, a...) _ldm_printk (KERN_ERR,   __func__, f, ##a)
 #define ldm_info(f, a...)  _ldm_printk (KERN_INFO,  __func__, f, ##a)
 
-__attribute__ ((format (printf, 3, 4)))
-static void _ldm_printk (const char *level, const char *function,
-                         const char *fmt, ...)
+static __printf(3, 4)
+void _ldm_printk(const char *level, const char *function, const char *fmt, ...)
 {
-        static char buf[128];
+        struct va_format vaf;
         va_list args;
 
         va_start (args, fmt);
-        vsnprintf (buf, sizeof (buf), fmt, args);
-        va_end (args);
 
-        printk ("%s%s(): %s\n", level, function, buf);
+        vaf.fmt = fmt;
+        vaf.va = &args;
+
+        printk("%s%s(): %pV\n", level, function, &vaf);
+
+        va_end(args);
 }
 
 /**
diff --git a/fs/pipe.c b/fs/pipe.c
index 0e0be1dc0f8e..4065f07366b3 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -1254,6 +1254,7 @@ out:
 
 static const struct super_operations pipefs_ops = {
         .destroy_inode = free_inode_nonrcu,
+        .statfs = simple_statfs,
 };
 
 /*
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 5eb02069e1b8..8f0087e20e16 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1107,13 +1107,6 @@ static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
                 goto err_sighand;
         }
 
-        if (oom_adjust != task->signal->oom_adj) {
-                if (oom_adjust == OOM_DISABLE)
-                        atomic_inc(&task->mm->oom_disable_count);
-                if (task->signal->oom_adj == OOM_DISABLE)
-                        atomic_dec(&task->mm->oom_disable_count);
-        }
-
         /*
          * Warn that /proc/pid/oom_adj is deprecated, see
          * Documentation/feature-removal-schedule.txt.
@@ -1215,12 +1208,6 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
                 goto err_sighand;
         }
 
-        if (oom_score_adj != task->signal->oom_score_adj) {
-                if (oom_score_adj == OOM_SCORE_ADJ_MIN)
-                        atomic_inc(&task->mm->oom_disable_count);
-                if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
-                        atomic_dec(&task->mm->oom_disable_count);
-        }
         task->signal->oom_score_adj = oom_score_adj;
         if (has_capability_noaudit(current, CAP_SYS_RESOURCE))
                 task->signal->oom_score_adj_min = oom_score_adj;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 5afaa58a8630..e418c5abdb0e 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -44,6 +44,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 "VmPeak:\t%8lu kB\n"
                 "VmSize:\t%8lu kB\n"
                 "VmLck:\t%8lu kB\n"
+                "VmPin:\t%8lu kB\n"
                 "VmHWM:\t%8lu kB\n"
                 "VmRSS:\t%8lu kB\n"
                 "VmData:\t%8lu kB\n"
@@ -55,6 +56,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
                 hiwater_vm << (PAGE_SHIFT-10),
                 (total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
                 mm->locked_vm << (PAGE_SHIFT-10),
+                mm->pinned_vm << (PAGE_SHIFT-10),
                 hiwater_rss << (PAGE_SHIFT-10),
                 total_rss << (PAGE_SHIFT-10),
                 data << (PAGE_SHIFT-10),
@@ -1039,6 +1041,9 @@ static int show_numa_map(struct seq_file *m, void *v)
                 seq_printf(m, " stack");
         }
 
+        if (is_vm_hugetlb_page(vma))
+                seq_printf(m, " huge");
+
         walk_page_range(vma->vm_start, vma->vm_end, &walk);
 
         if (!md->pages)
diff --git a/fs/read_write.c b/fs/read_write.c
index dfd125798791..5ad4248b0cd8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -633,7 +633,8 @@ ssize_t do_loop_readv_writev(struct file *filp, struct iovec *iov,
 ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
                               unsigned long nr_segs, unsigned long fast_segs,
                               struct iovec *fast_pointer,
-                              struct iovec **ret_pointer)
+                              struct iovec **ret_pointer,
+                              int check_access)
 {
         unsigned long seg;
         ssize_t ret;
@@ -689,7 +690,8 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
                         ret = -EINVAL;
                         goto out;
                 }
-                if (unlikely(!access_ok(vrfy_dir(type), buf, len))) {
+                if (check_access
+                    && unlikely(!access_ok(vrfy_dir(type), buf, len))) {
                         ret = -EFAULT;
                         goto out;
                 }
@@ -721,7 +723,7 @@ static ssize_t do_readv_writev(int type, struct file *file,
         }
 
         ret = rw_copy_check_uvector(type, uvector, nr_segs,
-                        ARRAY_SIZE(iovstack), iovstack, &iov);
+                                    ARRAY_SIZE(iovstack), iovstack, &iov, 1);
         if (ret <= 0)
                 goto out;
 
diff --git a/fs/super.c b/fs/super.c
index 3f56a269a4f4..32a81f3467e0 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -61,7 +61,7 @@ static int prune_super(struct shrinker *shrink, struct shrink_control *sc)
                 return -1;
 
         if (!grab_super_passive(sb))
-                return -1;
+                return !sc->nr_to_scan ? 0 : -1;
 
         if (sb->s_op && sb->s_op->nr_cached_objects)
                 fs_objects = sb->s_op->nr_cached_objects(sb);
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index dbd52d4b5eed..dc8a8dcc5ae1 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -112,8 +112,8 @@ struct extent_position {
 
 /* super.c */
 
-__attribute__((format(printf, 3, 4)))
-extern void udf_warning(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4) void udf_warning(struct super_block *, const char *,
+                                        const char *, ...);
 static inline void udf_updated_lvid(struct super_block *sb)
 {
         struct buffer_head *bh = UDF_SB(sb)->s_lvid_bh;
diff --git a/fs/ufs/ufs.h b/fs/ufs/ufs.h
index 5be2755dd715..c26f2bcec264 100644
--- a/fs/ufs/ufs.h
+++ b/fs/ufs/ufs.h
@@ -117,9 +117,12 @@ extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buf
 extern const struct file_operations ufs_dir_operations;
 
 /* super.c */
-extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
-extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
-extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
+extern __printf(3, 4)
+void ufs_warning(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void ufs_error(struct super_block *, const char *, const char *, ...);
+extern __printf(3, 4)
+void ufs_panic(struct super_block *, const char *, const char *, ...);
 
 /* symlink.c */
 extern const struct inode_operations ufs_fast_symlink_inode_operations;
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 11b2aad982d4..33b13310ee0c 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -902,11 +902,11 @@ xfs_vm_writepage(
          * random callers for direct reclaim or memcg reclaim.  We explicitly
          * allow reclaim from kswapd as the stack usage there is relatively low.
          *
-         * This should really be done by the core VM, but until that happens
-         * filesystems like XFS, btrfs and ext4 have to take care of this
-         * by themselves.
+         * This should never happen except in the case of a VM regression so
+         * warn about it.
          */
-        if ((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == PF_MEMALLOC)
+        if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) ==
+                        PF_MEMALLOC))
                 goto redirty;
 
         /*
diff --git a/fs/xfs/xfs_message.h b/fs/xfs/xfs_message.h
index 7fb7ea007672..56dc0c17f16a 100644
--- a/fs/xfs/xfs_message.h
+++ b/fs/xfs/xfs_message.h
@@ -3,31 +3,29 @@
 
 struct xfs_mount;
 
-extern void xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_alert(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_alert_tag(const struct xfs_mount *mp, int tag,
-                         const char *fmt, ...)
-        __attribute__ ((format (printf, 3, 4)));
-extern void xfs_crit(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_err(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_warn(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_notice(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
-extern void xfs_info(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
+extern __printf(2, 3)
+void xfs_emerg(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_alert(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(3, 4)
+void xfs_alert_tag(const struct xfs_mount *mp, int tag, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_crit(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_err(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_warn(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_notice(const struct xfs_mount *mp, const char *fmt, ...);
+extern __printf(2, 3)
+void xfs_info(const struct xfs_mount *mp, const char *fmt, ...);
 
 #ifdef DEBUG
-extern void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
-        __attribute__ ((format (printf, 2, 3)));
+extern __printf(2, 3)
+void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...);
 #else
-static inline void
-__attribute__ ((format (printf, 2, 3)))
-xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
+static inline __printf(2, 3)
+void xfs_debug(const struct xfs_mount *mp, const char *fmt, ...)
 {
 }
 #endif