Merge branch 'akpm' (updates from Andrew Morton)

Merge second patch-bomb from Andrew Morton:
 - misc fixes
 - audit stuff
 - fanotify/inotify/dnotify things
 - most of the rest of MM.  The new cache shrinker code from Glauber and
   Dave Chinner probably isn't quite stabilized yet.
 - ptrace
 - ipc
 - partitions
 - reboot cleanups
 - add LZ4 decompressor, use it for kernel compression

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits)
  lib/scatterlist: error handling in __sg_alloc_table()
  scsi_debug: fix do_device_access() with wrap around range
  crypto: talitos: use sg_pcopy_to_buffer()
  lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
  lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next()
  crypto: add lz4 Cryptographic API
  lib: add lz4 compressor module
  arm: add support for LZ4-compressed kernel
  lib: add support for LZ4-compressed kernel
  decompressor: add LZ4 decompressor module
  lib: add weak clz/ctz functions
  reboot: move arch/x86 reboot= handling to generic kernel
  reboot: arm: change reboot_mode to use enum reboot_mode
  reboot: arm: prepare reboot_mode for moving to generic kernel code
  reboot: arm: remove unused restart_mode fields from some arm subarchs
  reboot: unicore32: prepare reboot_mode for moving to generic kernel code
  reboot: x86: prepare reboot_mode for moving to generic kernel code
  reboot: checkpatch.pl the new kernel/reboot.c file
  reboot: move shutdown/reboot related functions to kernel/reboot.c
  reboot: remove -stable friendly PF_THREAD_BOUND define
  ...

15 files changed, 170 insertions, 65 deletions

diff --git a/include/linux/audit.h b/include/linux/audit.h
index b20b03852f21..729a4d165bcc 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -103,8 +103,11 @@ extern void __audit_syscall_exit(int ret_success, long ret_value);
 extern struct filename *__audit_reusename(const __user char *uptr);
 extern void __audit_getname(struct filename *name);
 extern void audit_putname(struct filename *name);
+
+#define AUDIT_INODE_PARENT      1       /* dentry represents the parent */
+#define AUDIT_INODE_HIDDEN      2       /* audit record should be hidden */
 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
-                                unsigned int parent);
+                                unsigned int flags);
 extern void __audit_inode_child(const struct inode *parent,
                                 const struct dentry *dentry,
                                 const unsigned char type);
@@ -148,10 +151,22 @@ static inline void audit_getname(struct filename *name)
         if (unlikely(!audit_dummy_context()))
                 __audit_getname(name);
 }
-static inline void audit_inode(struct filename *name, const struct dentry *dentry,
+static inline void audit_inode(struct filename *name,
+                                const struct dentry *dentry,
                                 unsigned int parent) {
+        if (unlikely(!audit_dummy_context())) {
+                unsigned int flags = 0;
+                if (parent)
+                        flags |= AUDIT_INODE_PARENT;
+                __audit_inode(name, dentry, flags);
+        }
+}
+static inline void audit_inode_parent_hidden(struct filename *name,
+                                                const struct dentry *dentry)
+{
         if (unlikely(!audit_dummy_context()))
-                __audit_inode(name, dentry, parent);
+                __audit_inode(name, dentry,
+                                AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
 }
 static inline void audit_inode_child(const struct inode *parent,
                                      const struct dentry *dentry,
@@ -311,7 +326,7 @@ static inline void audit_putname(struct filename *name)
 { }
 static inline void __audit_inode(struct filename *name,
                                         const struct dentry *dentry,
-                                        unsigned int parent)
+                                        unsigned int flags)
 { }
 static inline void __audit_inode_child(const struct inode *parent,
                                         const struct dentry *dentry,
@@ -321,6 +336,9 @@ static inline void audit_inode(struct filename *name,
                                 const struct dentry *dentry,
                                 unsigned int parent)
 { }
+static inline void audit_inode_parent_hidden(struct filename *name,
+                                const struct dentry *dentry)
+{ }
 static inline void audit_inode_child(const struct inode *parent,
                                      const struct dentry *dentry,
                                      const unsigned char type)
diff --git a/include/linux/decompress/unlz4.h b/include/linux/decompress/unlz4.h
new file mode 100644
index 000000000000..d5b68bf3ec92
--- /dev/null
+++ b/include/linux/decompress/unlz4.h
@@ -0,0 +1,10 @@
+#ifndef DECOMPRESS_UNLZ4_H
+#define DECOMPRESS_UNLZ4_H
+
+int unlz4(unsigned char *inbuf, int len,
+        int(*fill)(void*, unsigned int),
+        int(*flush)(void*, unsigned int),
+        unsigned char *output,
+        int *pos,
+        void(*error)(char *x));
+#endif
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 834c9e5113d9..a35b10e9a680 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -372,8 +372,8 @@ struct address_space_operations {
         int (*get_xip_mem)(struct address_space *, pgoff_t, int,
                                                 void **, unsigned long *);
         /*
-         * migrate the contents of a page to the specified target. If sync
-         * is false, it must not block.
+         * migrate the contents of a page to the specified target. If
+         * migrate_mode is MIGRATE_ASYNC, it must not block.
          */
         int (*migratepage) (struct address_space *,
                         struct page *, struct page *, enum migrate_mode);
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 0f615eb23d05..9b4dd491f7e8 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -209,7 +209,7 @@ static inline int allocflags_to_migratetype(gfp_t gfp_flags)
  *       0x9    => DMA or NORMAL (MOVABLE+DMA)
  *       0xa    => MOVABLE (Movable is valid only if HIGHMEM is set too)
  *       0xb    => BAD (MOVABLE+HIGHMEM+DMA)
- *       0xc    => DMA32 (MOVABLE+HIGHMEM+DMA32)
+ *       0xc    => DMA32 (MOVABLE+DMA32)
  *       0xd    => BAD (MOVABLE+DMA32+DMA)
  *       0xe    => BAD (MOVABLE+DMA32+HIGHMEM)
  *       0xf    => BAD (MOVABLE+DMA32+HIGHMEM+DMA)
diff --git a/include/linux/lz4.h b/include/linux/lz4.h
new file mode 100644
index 000000000000..d21c13f10a64
--- /dev/null
+++ b/include/linux/lz4.h
@@ -0,0 +1,87 @@
+#ifndef __LZ4_H__
+#define __LZ4_H__
+/*
+ * LZ4 Kernel Interface
+ *
+ * Copyright (C) 2013, LG Electronics, Kyungsik Lee <kyungsik.lee@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define LZ4_MEM_COMPRESS        (4096 * sizeof(unsigned char *))
+#define LZ4HC_MEM_COMPRESS      (65538 * sizeof(unsigned char *))
+
+/*
+ * lz4_compressbound()
+ * Provides the maximum size that LZ4 may output in a "worst case" scenario
+ * (input data not compressible)
+ */
+static inline size_t lz4_compressbound(size_t isize)
+{
+        return isize + (isize / 255) + 16;
+}
+
+/*
+ * lz4_compress()
+ *      src     : source address of the original data
+ *      src_len : size of the original data
+ *      dst     : output buffer address of the compressed data
+ *              This requires 'dst' of size LZ4_COMPRESSBOUND.
+ *      dst_len : is the output size, which is returned after compress done
+ *      workmem : address of the working memory.
+ *              This requires 'workmem' of size LZ4_MEM_COMPRESS.
+ *      return  : Success if return 0
+ *                Error if return (< 0)
+ *      note :  Destination buffer and workmem must be already allocated with
+ *              the defined size.
+ */
+int lz4_compress(const unsigned char *src, size_t src_len,
+                unsigned char *dst, size_t *dst_len, void *wrkmem);
+
+ /*
+  * lz4hc_compress()
+  *      src     : source address of the original data
+  *      src_len : size of the original data
+  *      dst     : output buffer address of the compressed data
+  *             This requires 'dst' of size LZ4_COMPRESSBOUND.
+  *      dst_len : is the output size, which is returned after compress done
+  *      workmem : address of the working memory.
+  *             This requires 'workmem' of size LZ4HC_MEM_COMPRESS.
+  *      return  : Success if return 0
+  *                Error if return (< 0)
+  *      note :  Destination buffer and workmem must be already allocated with
+  *              the defined size.
+  */
+int lz4hc_compress(const unsigned char *src, size_t src_len,
+                unsigned char *dst, size_t *dst_len, void *wrkmem);
+
+/*
+ * lz4_decompress()
+ *      src     : source address of the compressed data
+ *      src_len : is the input size, whcih is returned after decompress done
+ *      dest    : output buffer address of the decompressed data
+ *      actual_dest_len: is the size of uncompressed data, supposing it's known
+ *      return  : Success if return 0
+ *                Error if return (< 0)
+ *      note :  Destination buffer must be already allocated.
+ *              slightly faster than lz4_decompress_unknownoutputsize()
+ */
+int lz4_decompress(const char *src, size_t *src_len, char *dest,
+                size_t actual_dest_len);
+
+/*
+ * lz4_decompress_unknownoutputsize()
+ *      src     : source address of the compressed data
+ *      src_len : is the input size, therefore the compressed size
+ *      dest    : output buffer address of the decompressed data
+ *      dest_len: is the max size of the destination buffer, which is
+ *                      returned with actual size of decompressed data after
+ *                      decompress done
+ *      return  : Success if return 0
+ *                Error if return (< 0)
+ *      note :  Destination buffer must be already allocated.
+ */
+int lz4_decompress_unknownoutputsize(const char *src, size_t src_len,
+                char *dest, size_t *dest_len);
+#endif
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b87681adf0ba..f0224608d15e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -151,12 +151,6 @@ extern unsigned int kobjsize(const void *objp);
 #define VM_STACK_FLAGS  (VM_GROWSDOWN | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT)
 #endif
 
-#define VM_READHINTMASK                 (VM_SEQ_READ | VM_RAND_READ)
-#define VM_ClearReadHint(v)             (v)->vm_flags &= ~VM_READHINTMASK
-#define VM_NormalReadHint(v)            (!((v)->vm_flags & VM_READHINTMASK))
-#define VM_SequentialReadHint(v)        ((v)->vm_flags & VM_SEQ_READ)
-#define VM_RandomReadHint(v)            ((v)->vm_flags & VM_RAND_READ)
-
 /*
  * Special vmas that are non-mergable, non-mlock()able.
  * Note: mm/huge_memory.c VM_NO_THP depends on this definition.
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ae19af5ec02c..af4a3b77a8de 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -869,11 +869,6 @@ static inline int is_highmem_idx(enum zone_type idx)
 #endif
 }
 
-static inline int is_normal_idx(enum zone_type idx)
-{
-        return (idx == ZONE_NORMAL);
-}
-
 /**
  * is_highmem - helper function to quickly check if a struct zone is a 
  *              highmem zone or not.  This is an attempt to keep references
@@ -892,29 +887,6 @@ static inline int is_highmem(struct zone *zone)
 #endif
 }
 
-static inline int is_normal(struct zone *zone)
-{
-        return zone == zone->zone_pgdat->node_zones + ZONE_NORMAL;
-}
-
-static inline int is_dma32(struct zone *zone)
-{
-#ifdef CONFIG_ZONE_DMA32
-        return zone == zone->zone_pgdat->node_zones + ZONE_DMA32;
-#else
-        return 0;
-#endif
-}
-
-static inline int is_dma(struct zone *zone)
-{
-#ifdef CONFIG_ZONE_DMA
-        return zone == zone->zone_pgdat->node_zones + ZONE_DMA;
-#else
-        return 0;
-#endif
-}
-
 /* These two functions are used to setup the per zone pages min values */
 struct ctl_table;
 int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 89573a33ab3c..07d0df6bf768 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -142,9 +142,6 @@ static inline void ptrace_init_task(struct task_struct *child, bool ptrace)
 {
         INIT_LIST_HEAD(&child->ptrace_entry);
         INIT_LIST_HEAD(&child->ptraced);
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
-        atomic_set(&child->ptrace_bp_refcnt, 1);
-#endif
         child->jobctl = 0;
         child->ptrace = 0;
         child->parent = child->real_parent;
@@ -351,11 +348,4 @@ extern int task_current_syscall(struct task_struct *target, long *callno,
                                 unsigned long args[6], unsigned int maxargs,
                                 unsigned long *sp, unsigned long *pc);
 
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
-extern int ptrace_get_breakpoints(struct task_struct *tsk);
-extern void ptrace_put_breakpoints(struct task_struct *tsk);
-#else
-static inline void ptrace_put_breakpoints(struct task_struct *tsk) { }
-#endif /* CONFIG_HAVE_HW_BREAKPOINT */
-
 #endif
diff --git a/include/linux/reboot.h b/include/linux/reboot.h
index 23b36304cd88..8e00f9f6f963 100644
--- a/include/linux/reboot.h
+++ b/include/linux/reboot.h
@@ -10,6 +10,31 @@
 #define SYS_HALT        0x0002  /* Notify of system halt */
 #define SYS_POWER_OFF   0x0003  /* Notify of system power off */
 
+enum reboot_mode {
+        REBOOT_COLD = 0,
+        REBOOT_WARM,
+        REBOOT_HARD,
+        REBOOT_SOFT,
+        REBOOT_GPIO,
+};
+extern enum reboot_mode reboot_mode;
+
+enum reboot_type {
+        BOOT_TRIPLE = 't',
+        BOOT_KBD = 'k',
+        BOOT_BIOS = 'b',
+        BOOT_ACPI = 'a',
+        BOOT_EFI = 'e',
+        BOOT_CF9 = 'p',
+        BOOT_CF9_COND = 'q',
+};
+extern enum reboot_type reboot_type;
+
+extern int reboot_default;
+extern int reboot_cpu;
+extern int reboot_force;
+
+
 extern int register_reboot_notifier(struct notifier_block *);
 extern int unregister_reboot_notifier(struct notifier_block *);
 
@@ -26,7 +51,7 @@ extern void machine_shutdown(void);
 struct pt_regs;
 extern void machine_crash_shutdown(struct pt_regs *);
 
-/* 
+/*
  * Architecture independent implemenations of sys_reboot commands.
  */
 
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 26806775b11b..adae88f5b0ab 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -244,6 +244,11 @@ size_t sg_copy_from_buffer(struct scatterlist *sgl, unsigned int nents,
 size_t sg_copy_to_buffer(struct scatterlist *sgl, unsigned int nents,
                          void *buf, size_t buflen);
 
+size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents,
+                            void *buf, size_t buflen, off_t skip);
+size_t sg_pcopy_to_buffer(struct scatterlist *sgl, unsigned int nents,
+                          void *buf, size_t buflen, off_t skip);
+
 /*
  * Maximum number of entries that will be allocated in one piece, if
  * a list larger than this is required then chaining will be utilized.
diff --git a/include/linux/sched.h b/include/linux/sched.h
index cdd5407b37e2..75324d8157e3 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1401,9 +1401,6 @@ struct task_struct {
         } memcg_batch;
         unsigned int memcg_kmem_skip_account;
 #endif
-#ifdef CONFIG_HAVE_HW_BREAKPOINT
-        atomic_t ptrace_bp_refcnt;
-#endif
 #ifdef CONFIG_UPROBES
         struct uprobe_task *utask;
 #endif
diff --git a/include/linux/sem.h b/include/linux/sem.h
index 53d42650b193..976ce3a19f1b 100644
--- a/include/linux/sem.h
+++ b/include/linux/sem.h
@@ -12,10 +12,12 @@ struct task_struct;
 struct sem_array {
         struct kern_ipc_perm    ____cacheline_aligned_in_smp
                                 sem_perm;       /* permissions .. see ipc.h */
-        time_t                  sem_otime;      /* last semop time */
         time_t                  sem_ctime;      /* last change time */
         struct sem              *sem_base;      /* ptr to first semaphore in array */
-        struct list_head        sem_pending;    /* pending operations to be processed */
+        struct list_head        pending_alter;  /* pending operations */
+                                                /* that alter the array */
+        struct list_head        pending_const;  /* pending complex operations */
+                                                /* that do not alter semvals */
         struct list_head        list_id;        /* undo requests on this array */
         int                     sem_nsems;      /* no. of semaphores in array */
         int                     complex_count;  /* pending complex operations */
diff --git a/include/linux/vexpress.h b/include/linux/vexpress.h
index ea7168a68081..617c01b8f74a 100644
--- a/include/linux/vexpress.h
+++ b/include/linux/vexpress.h
@@ -15,6 +15,7 @@
 #define _LINUX_VEXPRESS_H
 
 #include <linux/device.h>
+#include <linux/reboot.h>
 
 #define VEXPRESS_SITE_MB                0
 #define VEXPRESS_SITE_DB1               1
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index dd0a2c810529..4b8a89189a29 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -10,12 +10,12 @@
 struct vm_area_struct;          /* vma defining user mapping in mm_types.h */
 
 /* bits in flags of vmalloc's vm_struct below */
-#define VM_IOREMAP      0x00000001      /* ioremap() and friends */
-#define VM_ALLOC        0x00000002      /* vmalloc() */
-#define VM_MAP          0x00000004      /* vmap()ed pages */
-#define VM_USERMAP      0x00000008      /* suitable for remap_vmalloc_range */
-#define VM_VPAGES       0x00000010      /* buffer for pages was vmalloc'ed */
-#define VM_UNLIST       0x00000020      /* vm_struct is not listed in vmlist */
+#define VM_IOREMAP              0x00000001      /* ioremap() and friends */
+#define VM_ALLOC                0x00000002      /* vmalloc() */
+#define VM_MAP                  0x00000004      /* vmap()ed pages */
+#define VM_USERMAP              0x00000008      /* suitable for remap_vmalloc_range */
+#define VM_VPAGES               0x00000010      /* buffer for pages was vmalloc'ed */
+#define VM_UNINITIALIZED        0x00000020      /* vm_struct is not fully initialized */
 /* bits [20..32] reserved for arch specific ioremap internals */
 
 /*
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index abfe11787af3..4e198ca1f685 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -47,11 +47,16 @@ enum wb_reason {
         WB_REASON_LAPTOP_TIMER,
         WB_REASON_FREE_MORE_MEM,
         WB_REASON_FS_FREE_SPACE,
+        /*
+         * There is no bdi forker thread any more and works are done
+         * by emergency worker, however, this is TPs userland visible
+         * and we'll be exposing exactly the same information,
+         * so it has a mismatch name.
+         */
         WB_REASON_FORKER_THREAD,
 
         WB_REASON_MAX,
 };
-extern const char *wb_reason_name[];
 
 /*
  * A control structure which tells the writeback code what to do.  These are
@@ -95,7 +100,6 @@ int try_to_writeback_inodes_sb_nr(struct super_block *, unsigned long nr,
 void sync_inodes_sb(struct super_block *);
 long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
                                 enum wb_reason reason);
-long wb_do_writeback(struct bdi_writeback *wb, int force_wait);
 void wakeup_flusher_threads(long nr_pages, enum wb_reason reason);
 void inode_wait_for_writeback(struct inode *inode);