Merge branch 'akpm' (Andrew's patch-bomb)

Merge Andrew's first set of patches:
 "Non-MM patches:

   - lots of misc bits

   - tree-wide have_clk() cleanups

   - quite a lot of printk tweaks.  I draw your attention to "printk:
     convert the format for KERN_<LEVEL> to a 2 byte pattern" which
     looks a bit scary.  But afaict it's solid.

   - backlight updates

   - lib/ feature work (notably the addition and use of memweight())

   - checkpatch updates

   - rtc updates

   - nilfs updates

   - fatfs updates (partial, still waiting for acks)

   - kdump, proc, fork, IPC, sysctl, taskstats, pps, etc

   - new fault-injection feature work"

* Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits)
  drivers/misc/lkdtm.c: fix missing allocation failure check
  lib/scatterlist: do not re-write gfp_flags in __sg_alloc_table()
  fault-injection: add tool to run command with failslab or fail_page_alloc
  fault-injection: add selftests for cpu and memory hotplug
  powerpc: pSeries reconfig notifier error injection module
  memory: memory notifier error injection module
  PM: PM notifier error injection module
  cpu: rewrite cpu-notifier-error-inject module
  fault-injection: notifier error injection
  c/r: fcntl: add F_GETOWNER_UIDS option
  resource: make sure requested range is included in the root range
  include/linux/aio.h: cpp->C conversions
  fs: cachefiles: add support for large files in filesystem caching
  pps: return PTR_ERR on error in device_create
  taskstats: check nla_reserve() return
  sysctl: suppress kmemleak messages
  ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION
  ipc: compat: use signed size_t types for msgsnd and msgrcv
  ipc: allow compat IPC version field parsing if !ARCH_WANT_OLD_COMPAT_IPC
  ipc: add COMPAT_SHMLBA support
  ...

12 files changed, 243 insertions, 137 deletions

diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h
index 9e5b0356e2bb..a48937d4a5ea 100644
--- a/include/asm-generic/fcntl.h
+++ b/include/asm-generic/fcntl.h
@@ -120,6 +120,10 @@
 #define F_GETOWN_EX     16
 #endif
 
+#ifndef F_GETOWNER_UIDS
+#define F_GETOWNER_UIDS 17
+#endif
+
 #define F_OWNER_TID     0
 #define F_OWNER_PID     1
 #define F_OWNER_PGRP    2
diff --git a/include/linux/aio.h b/include/linux/aio.h
index b1a520ec8b59..31ff6dba4872 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -126,22 +126,20 @@ struct kiocb {
         struct eventfd_ctx      *ki_eventfd;
 };
 
-#define is_sync_kiocb(iocb)     ((iocb)->ki_key == KIOCB_SYNC_KEY)
-#define init_sync_kiocb(x, filp)                        \
-        do {                                            \
-                struct task_struct *tsk = current;      \
-                (x)->ki_flags = 0;                      \
-                (x)->ki_users = 1;                      \
-                (x)->ki_key = KIOCB_SYNC_KEY;           \
-                (x)->ki_filp = (filp);                  \
-                (x)->ki_ctx = NULL;                     \
-                (x)->ki_cancel = NULL;                  \
-                (x)->ki_retry = NULL;                   \
-                (x)->ki_dtor = NULL;                    \
-                (x)->ki_obj.tsk = tsk;                  \
-                (x)->ki_user_data = 0;                  \
-                (x)->private = NULL;                    \
-        } while (0)
+static inline bool is_sync_kiocb(struct kiocb *kiocb)
+{
+        return kiocb->ki_key == KIOCB_SYNC_KEY;
+}
+
+static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
+{
+        *kiocb = (struct kiocb) {
+                        .ki_users = 1,
+                        .ki_key = KIOCB_SYNC_KEY,
+                        .ki_filp = filp,
+                        .ki_obj.tsk = current,
+                };
+}
 
 #define AIO_RING_MAGIC                  0xa10a10a1
 #define AIO_RING_COMPAT_FEATURES        1
@@ -161,8 +159,6 @@ struct aio_ring {
         struct io_event         io_events[0];
 }; /* 128 bytes + ring size */
 
-#define aio_ring_avail(info, ring)      (((ring)->head + (info)->nr - 1 - (ring)->tail) % (info)->nr)
-
 #define AIO_RING_PAGES  8
 struct aio_ring_info {
         unsigned long           mmap_base;
@@ -177,6 +173,12 @@ struct aio_ring_info {
         struct page             *internal_pages[AIO_RING_PAGES];
 };
 
+static inline unsigned aio_ring_avail(struct aio_ring_info *info,
+                                        struct aio_ring *ring)
+{
+        return (ring->head + info->nr - 1 - ring->tail) % info->nr;
+}
+
 struct kioctx {
         atomic_t                users;
         int                     dead;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 2fd6a4234531..b3ac22d0fc1f 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -85,6 +85,43 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
 #endif
 
 /**
+ * clk_prepare - prepare a clock source
+ * @clk: clock source
+ *
+ * This prepares the clock source for use.
+ *
+ * Must not be called from within atomic context.
+ */
+#ifdef CONFIG_HAVE_CLK_PREPARE
+int clk_prepare(struct clk *clk);
+#else
+static inline int clk_prepare(struct clk *clk)
+{
+        might_sleep();
+        return 0;
+}
+#endif
+
+/**
+ * clk_unprepare - undo preparation of a clock source
+ * @clk: clock source
+ *
+ * This undoes a previously prepared clock.  The caller must balance
+ * the number of prepare and unprepare calls.
+ *
+ * Must not be called from within atomic context.
+ */
+#ifdef CONFIG_HAVE_CLK_PREPARE
+void clk_unprepare(struct clk *clk);
+#else
+static inline void clk_unprepare(struct clk *clk)
+{
+        might_sleep();
+}
+#endif
+
+#ifdef CONFIG_HAVE_CLK
+/**
  * clk_get - lookup and obtain a reference to a clock producer.
  * @dev: device for clock "consumer"
  * @id: clock consumer ID
@@ -122,24 +159,6 @@ struct clk *clk_get(struct device *dev, const char *id);
 struct clk *devm_clk_get(struct device *dev, const char *id);
 
 /**
- * clk_prepare - prepare a clock source
- * @clk: clock source
- *
- * This prepares the clock source for use.
- *
- * Must not be called from within atomic context.
- */
-#ifdef CONFIG_HAVE_CLK_PREPARE
-int clk_prepare(struct clk *clk);
-#else
-static inline int clk_prepare(struct clk *clk)
-{
-        might_sleep();
-        return 0;
-}
-#endif
-
-/**
  * clk_enable - inform the system when the clock source should be running.
  * @clk: clock source
  *
@@ -167,47 +186,6 @@ int clk_enable(struct clk *clk);
  */
 void clk_disable(struct clk *clk);
 
-
-/**
- * clk_unprepare - undo preparation of a clock source
- * @clk: clock source
- *
- * This undoes a previously prepared clock.  The caller must balance
- * the number of prepare and unprepare calls.
- *
- * Must not be called from within atomic context.
- */
-#ifdef CONFIG_HAVE_CLK_PREPARE
-void clk_unprepare(struct clk *clk);
-#else
-static inline void clk_unprepare(struct clk *clk)
-{
-        might_sleep();
-}
-#endif
-
-/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */
-static inline int clk_prepare_enable(struct clk *clk)
-{
-        int ret;
-
-        ret = clk_prepare(clk);
-        if (ret)
-                return ret;
-        ret = clk_enable(clk);
-        if (ret)
-                clk_unprepare(clk);
-
-        return ret;
-}
-
-/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */
-static inline void clk_disable_unprepare(struct clk *clk)
-{
-        clk_disable(clk);
-        clk_unprepare(clk);
-}
-
 /**
  * clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
  *                This is only valid once the clock source has been enabled.
@@ -298,6 +276,78 @@ struct clk *clk_get_parent(struct clk *clk);
  */
 struct clk *clk_get_sys(const char *dev_id, const char *con_id);
 
+#else /* !CONFIG_HAVE_CLK */
+
+static inline struct clk *clk_get(struct device *dev, const char *id)
+{
+        return NULL;
+}
+
+static inline struct clk *devm_clk_get(struct device *dev, const char *id)
+{
+        return NULL;
+}
+
+static inline void clk_put(struct clk *clk) {}
+
+static inline void devm_clk_put(struct device *dev, struct clk *clk) {}
+
+static inline int clk_enable(struct clk *clk)
+{
+        return 0;
+}
+
+static inline void clk_disable(struct clk *clk) {}
+
+static inline unsigned long clk_get_rate(struct clk *clk)
+{
+        return 0;
+}
+
+static inline int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+        return 0;
+}
+
+static inline long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+        return 0;
+}
+
+static inline int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+        return 0;
+}
+
+static inline struct clk *clk_get_parent(struct clk *clk)
+{
+        return NULL;
+}
+
+#endif
+
+/* clk_prepare_enable helps cases using clk_enable in non-atomic context. */
+static inline int clk_prepare_enable(struct clk *clk)
+{
+        int ret;
+
+        ret = clk_prepare(clk);
+        if (ret)
+                return ret;
+        ret = clk_enable(clk);
+        if (ret)
+                clk_unprepare(clk);
+
+        return ret;
+}
+
+/* clk_disable_unprepare helps cases using clk_disable in non-atomic context. */
+static inline void clk_disable_unprepare(struct clk *clk)
+{
+        clk_disable(clk);
+        clk_unprepare(clk);
+}
+
 /**
  * clk_add_alias - add a new clock alias
  * @alias: name for clock alias
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 4e890394ef99..09b28b7369d7 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -265,9 +265,9 @@ long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
 #else
 long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp,
-                size_t msgsz, int msgflg);
+                compat_ssize_t msgsz, int msgflg);
 long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp,
-                size_t msgsz, long msgtyp, int msgflg);
+                compat_ssize_t msgsz, long msgtyp, int msgflg);
 long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 #endif
 long compat_sys_msgctl(int first, int second, void __user *uptr);
diff --git a/include/linux/kern_levels.h b/include/linux/kern_levels.h
new file mode 100644
index 000000000000..866caaa9e2bb
--- /dev/null
+++ b/include/linux/kern_levels.h
@@ -0,0 +1,25 @@
+#ifndef __KERN_LEVELS_H__
+#define __KERN_LEVELS_H__
+
+#define KERN_SOH        "\001"          /* ASCII Start Of Header */
+#define KERN_SOH_ASCII  '\001'
+
+#define KERN_EMERG      KERN_SOH "0"    /* system is unusable */
+#define KERN_ALERT      KERN_SOH "1"    /* action must be taken immediately */
+#define KERN_CRIT       KERN_SOH "2"    /* critical conditions */
+#define KERN_ERR        KERN_SOH "3"    /* error conditions */
+#define KERN_WARNING    KERN_SOH "4"    /* warning conditions */
+#define KERN_NOTICE     KERN_SOH "5"    /* normal but significant condition */
+#define KERN_INFO       KERN_SOH "6"    /* informational */
+#define KERN_DEBUG      KERN_SOH "7"    /* debug-level messages */
+
+#define KERN_DEFAULT    KERN_SOH "d"    /* the default kernel loglevel */
+
+/*
+ * Annotation for a "continued" line of log printout (only done after a
+ * line that had no enclosing \n). Only to be used by core/arch code
+ * during early bootup (a continued line is not SMP-safe otherwise).
+ */
+#define KERN_CONT       ""
+
+#endif
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 89bd4a4dcfb4..98755767c7b0 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -293,7 +293,7 @@ struct nilfs_dir_entry {
         __le64  inode;                  /* Inode number */
         __le16  rec_len;                /* Directory entry length */
         __u8    name_len;               /* Name length */
-        __u8    file_type;
+        __u8    file_type;              /* Dir entry type (file, dir, etc) */
         char    name[NILFS_NAME_LEN];   /* File name */
         char    pad;
 };
@@ -395,7 +395,7 @@ union nilfs_binfo {
 };
 
 /**
- * struct nilfs_segment_summary - segment summary
+ * struct nilfs_segment_summary - segment summary header
  * @ss_datasum: checksum of data
  * @ss_sumsum: checksum of segment summary
  * @ss_magic: magic number
@@ -683,9 +683,9 @@ struct nilfs_sufile_header {
 
 /**
  * nilfs_suinfo - segment usage information
- * @sui_lastmod:
- * @sui_nblocks:
- * @sui_flags:
+ * @sui_lastmod: timestamp of last modification
+ * @sui_nblocks: number of written blocks in segment
+ * @sui_flags: segment usage flags
  */
 struct nilfs_suinfo {
         __u64 sui_lastmod;
@@ -716,9 +716,10 @@ enum {
 };
 
 /**
- * struct nilfs_cpmode -
- * @cc_cno:
- * @cc_mode:
+ * struct nilfs_cpmode - change checkpoint mode structure
+ * @cm_cno: checkpoint number
+ * @cm_mode: mode of checkpoint
+ * @cm_pad: padding
  */
 struct nilfs_cpmode {
         __u64 cm_cno;
@@ -728,11 +729,11 @@ struct nilfs_cpmode {
 
 /**
  * struct nilfs_argv - argument vector
- * @v_base:
- * @v_nmembs:
- * @v_size:
- * @v_flags:
- * @v_index:
+ * @v_base: pointer on data array from userspace
+ * @v_nmembs: number of members in data array
+ * @v_size: size of data array in bytes
+ * @v_flags: flags
+ * @v_index: start number of target data items
  */
 struct nilfs_argv {
         __u64 v_base;
@@ -743,9 +744,9 @@ struct nilfs_argv {
 };
 
 /**
- * struct nilfs_period -
- * @p_start:
- * @p_end:
+ * struct nilfs_period - period of checkpoint numbers
+ * @p_start: start checkpoint number (inclusive)
+ * @p_end: end checkpoint number (exclusive)
  */
 struct nilfs_period {
         __u64 p_start;
@@ -753,7 +754,7 @@ struct nilfs_period {
 };
 
 /**
- * struct nilfs_cpstat -
+ * struct nilfs_cpstat - checkpoint statistics
  * @cs_cno: checkpoint number
  * @cs_ncps: number of checkpoints
  * @cs_nsss: number of snapshots
@@ -765,7 +766,7 @@ struct nilfs_cpstat {
 };
 
 /**
- * struct nilfs_sustat -
+ * struct nilfs_sustat - segment usage statistics
  * @ss_nsegs: number of segments
  * @ss_ncleansegs: number of clean segments
  * @ss_ndirtysegs: number of dirty segments
@@ -784,10 +785,10 @@ struct nilfs_sustat {
 
 /**
  * struct nilfs_vinfo - virtual block number information
- * @vi_vblocknr:
- * @vi_start:
- * @vi_end:
- * @vi_blocknr:
+ * @vi_vblocknr: virtual block number
+ * @vi_start: start checkpoint number (inclusive)
+ * @vi_end: end checkpoint number (exclusive)
+ * @vi_blocknr: disk block number
  */
 struct nilfs_vinfo {
         __u64 vi_vblocknr;
@@ -797,7 +798,15 @@ struct nilfs_vinfo {
 };
 
 /**
- * struct nilfs_vdesc -
+ * struct nilfs_vdesc - descriptor of virtual block number
+ * @vd_ino: inode number
+ * @vd_cno: checkpoint number
+ * @vd_vblocknr: virtual block number
+ * @vd_period: period of checkpoint numbers
+ * @vd_blocknr: disk block number
+ * @vd_offset: logical block offset inside a file
+ * @vd_flags: flags (data or node block)
+ * @vd_pad: padding
  */
 struct nilfs_vdesc {
         __u64 vd_ino;
@@ -811,7 +820,13 @@ struct nilfs_vdesc {
 };
 
 /**
- * struct nilfs_bdesc -
+ * struct nilfs_bdesc - descriptor of disk block number
+ * @bd_ino: inode number
+ * @bd_oblocknr: disk block address (for skipping dead blocks)
+ * @bd_blocknr: disk block address
+ * @bd_offset: logical block offset inside a file
+ * @bd_level: level in the b-tree organization
+ * @bd_pad: padding
  */
 struct nilfs_bdesc {
         __u64 bd_ino;
diff --git a/include/linux/lp855x.h b/include/linux/platform_data/lp855x.h
index 781a490a451b..cc76f1f18f18 100644
--- a/include/linux/lp855x.h
+++ b/include/linux/platform_data/lp855x.h
@@ -47,12 +47,6 @@
                                 (LP8556_I2C_ONLY << BRT_MODE_SHFT))
 #define LP8556_COMB2_CONFIG     (LP8556_COMBINED2 << BRT_MODE_SHFT)
 
-/* ROM area boundary */
-#define EEPROM_START    (0xA0)
-#define EEPROM_END      (0xA7)
-#define EPROM_START     (0xA0)
-#define EPROM_END       (0xAF)
-
 enum lp855x_chip_id {
         LP8550,
         LP8551,
diff --git a/include/linux/platform_data/mv_usb.h b/include/linux/platform_data/mv_usb.h
index d94804aca764..944b01dd103e 100644
--- a/include/linux/platform_data/mv_usb.h
+++ b/include/linux/platform_data/mv_usb.h
@@ -52,13 +52,4 @@ struct mv_usb_platform_data {
         int     (*set_vbus)(unsigned int vbus);
         int     (*private_init)(void __iomem *opregs, void __iomem *phyregs);
 };
-
-#ifndef CONFIG_HAVE_CLK
-/* Dummy stub for clk framework */
-#define clk_get(dev, id)       NULL
-#define clk_put(clock)         do {} while (0)
-#define clk_enable(clock)      do {} while (0)
-#define clk_disable(clock)     do {} while (0)
-#endif
-
 #endif
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 1bec2f7a2d42..9afc01e5a0a6 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -2,27 +2,34 @@
 #define __KERNEL_PRINTK__
 
 #include <linux/init.h>
+#include <linux/kern_levels.h>
 
 extern const char linux_banner[];
 extern const char linux_proc_banner[];
 
-#define KERN_EMERG      "<0>"   /* system is unusable                   */
-#define KERN_ALERT      "<1>"   /* action must be taken immediately     */
-#define KERN_CRIT       "<2>"   /* critical conditions                  */
-#define KERN_ERR        "<3>"   /* error conditions                     */
-#define KERN_WARNING    "<4>"   /* warning conditions                   */
-#define KERN_NOTICE     "<5>"   /* normal but significant condition     */
-#define KERN_INFO       "<6>"   /* informational                        */
-#define KERN_DEBUG      "<7>"   /* debug-level messages                 */
-
-/* Use the default kernel loglevel */
-#define KERN_DEFAULT    "<d>"
-/*
- * Annotation for a "continued" line of log printout (only done after a
- * line that had no enclosing \n). Only to be used by core/arch code
- * during early bootup (a continued line is not SMP-safe otherwise).
- */
-#define KERN_CONT       "<c>"
+static inline int printk_get_level(const char *buffer)
+{
+        if (buffer[0] == KERN_SOH_ASCII && buffer[1]) {
+                switch (buffer[1]) {
+                case '0' ... '7':
+                case 'd':       /* KERN_DEFAULT */
+                        return buffer[1];
+                }
+        }
+        return 0;
+}
+
+static inline const char *printk_skip_level(const char *buffer)
+{
+        if (printk_get_level(buffer)) {
+                switch (buffer[1]) {
+                case '0' ... '7':
+                case 'd':       /* KERN_DEFAULT */
+                        return buffer + 2;
+                }
+        }
+        return buffer;
+}
 
 extern int console_printk[];
 
diff --git a/include/linux/sched.h b/include/linux/sched.h
index a721cef7e2d4..68dcffaa62a0 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -334,6 +334,14 @@ static inline void lockup_detector_init(void)
 }
 #endif
 
+#if defined(CONFIG_LOCKUP_DETECTOR) && defined(CONFIG_SUSPEND)
+void lockup_detector_bootcpu_resume(void);
+#else
+static inline void lockup_detector_bootcpu_resume(void)
+{
+}
+#endif
+
 #ifdef CONFIG_DETECT_HUNG_TASK
 extern unsigned int  sysctl_hung_task_panic;
 extern unsigned long sysctl_hung_task_check_count;
@@ -406,6 +414,11 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
 extern void set_dumpable(struct mm_struct *mm, int value);
 extern int get_dumpable(struct mm_struct *mm);
 
+/* get/set_dumpable() values */
+#define SUID_DUMPABLE_DISABLED  0
+#define SUID_DUMPABLE_ENABLED   1
+#define SUID_DUMPABLE_SAFE      2
+
 /* mm flags */
 /* dumpable bits */
 #define MMF_DUMPABLE      0  /* core dump is permitted */
diff --git a/include/linux/shm.h b/include/linux/shm.h
index 92808b86703b..edd086883ccb 100644
--- a/include/linux/shm.h
+++ b/include/linux/shm.h
@@ -107,12 +107,14 @@ struct shmid_kernel /* private to the kernel */
 #define SHM_NORESERVE   010000  /* don't check for reservations */
 
 #ifdef CONFIG_SYSVIPC
-long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr);
+long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
+              unsigned long shmlba);
 extern int is_file_shm_hugepages(struct file *file);
 extern void exit_shm(struct task_struct *task);
 #else
 static inline long do_shmat(int shmid, char __user *shmaddr,
-                                int shmflg, unsigned long *addr)
+                            int shmflg, unsigned long *addr,
+                            unsigned long shmlba)
 {
         return -ENOSYS;
 }
diff --git a/include/linux/string.h b/include/linux/string.h
index e033564f10ba..ffe0442e18d2 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -145,4 +145,7 @@ static inline bool strstarts(const char *str, const char *prefix)
         return strncmp(str, prefix, strlen(prefix)) == 0;
 }
 #endif
+
+extern size_t memweight(const void *ptr, size_t bytes);
+
 #endif /* _LINUX_STRING_H_ */