Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - kasan updates

 - procfs

 - lib/bitmap updates

 - other lib/ updates

 - checkpatch tweaks

 - rapidio

 - ubsan

 - pipe fixes and cleanups

 - lots of other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
  Documentation/sysctl/user.txt: fix typo
  MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
  MAINTAINERS: update various PALM patterns
  MAINTAINERS: update "ARM/OXNAS platform support" patterns
  MAINTAINERS: update Cortina/Gemini patterns
  MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
  MAINTAINERS: remove ANDROID ION pattern
  mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
  mm: docs: fix parameter names mismatch
  mm: docs: fixup punctuation
  pipe: read buffer limits atomically
  pipe: simplify round_pipe_size()
  pipe: reject F_SETPIPE_SZ with size over UINT_MAX
  pipe: fix off-by-one error when checking buffer limits
  pipe: actually allow root to exceed the pipe buffer limits
  pipe, sysctl: remove pipe_proc_fn()
  pipe, sysctl: drop 'min' parameter from pipe-max-size converter
  kasan: rework Kconfig settings
  crash_dump: is_kdump_kernel can be boolean
  kernel/mutex: mutex_is_locked can be boolean
  ...

include/linux/bitmap.h

@@ -64,9 +64,14 @@
  *  bitmap_find_free_region(bitmap, bits, order)  Find and allocate bit region
  *  bitmap_release_region(bitmap, pos, order)   Free specified bit region
  *  bitmap_allocate_region(bitmap, pos, order)  Allocate specified bit region
- *  bitmap_from_u32array(dst, nbits, buf, nwords)  *dst = *buf (nwords 32b words)
- *  bitmap_to_u32array(buf, nwords, src, nbits) *buf = *dst (nwords 32b words)
+ *  bitmap_from_arr32(dst, buf, nbits)          Copy nbits from u32[] buf to dst
+ *  bitmap_to_arr32(buf, src, nbits)            Copy nbits from buf to u32[] dst
  *
+ * Note, bitmap_zero() and bitmap_fill() operate over the region of
+ * unsigned longs, that is, bits behind bitmap till the unsigned long
+ * boundary will be zeroed or filled as well. Consider to use
+ * bitmap_clear() or bitmap_set() to make explicit zeroing or filling
+ * respectively.
  */
 
 /**
@@ -83,8 +88,12 @@
  *  test_and_change_bit(bit, addr)      Change bit and return old value
  *  find_first_zero_bit(addr, nbits)    Position first zero bit in *addr
  *  find_first_bit(addr, nbits)         Position first set bit in *addr
- *  find_next_zero_bit(addr, nbits, bit)  Position next zero bit in *addr >= bit
+ *  find_next_zero_bit(addr, nbits, bit)
+ *                                      Position next zero bit in *addr >= bit
  *  find_next_bit(addr, nbits, bit)     Position next set bit in *addr >= bit
+ *  find_next_and_bit(addr1, addr2, nbits, bit)
+ *                                      Same as find_next_bit, but in
+ *                                      (*addr1 & *addr2)
  *
  */
 
@@ -174,14 +183,7 @@ extern void bitmap_fold(unsigned long *dst, const unsigned long *orig,
 extern int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order);
 extern void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order);
 extern int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order);
-extern unsigned int bitmap_from_u32array(unsigned long *bitmap,
-					 unsigned int nbits,
-					 const u32 *buf,
-					 unsigned int nwords);
-extern unsigned int bitmap_to_u32array(u32 *buf,
-				       unsigned int nwords,
-				       const unsigned long *bitmap,
-				       unsigned int nbits);
+
 #ifdef __BIG_ENDIAN
 extern void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int nbits);
 #else
@@ -209,12 +211,12 @@ static inline void bitmap_zero(unsigned long *dst, unsigned int nbits)
 
 static inline void bitmap_fill(unsigned long *dst, unsigned int nbits)
 {
-	unsigned int nlongs = BITS_TO_LONGS(nbits);
-	if (!small_const_nbits(nbits)) {
-		unsigned int len = (nlongs - 1) * sizeof(unsigned long);
-		memset(dst, 0xff,  len);
+	if (small_const_nbits(nbits))
+		*dst = ~0UL;
+	else {
+		unsigned int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
+		memset(dst, 0xff, len);
 	}
-	dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
 }
 
 static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
@@ -228,6 +230,35 @@ static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
 	}
 }
 
+/*
+ * Copy bitmap and clear tail bits in last word.
+ */
+static inline void bitmap_copy_clear_tail(unsigned long *dst,
+		const unsigned long *src, unsigned int nbits)
+{
+	bitmap_copy(dst, src, nbits);
+	if (nbits % BITS_PER_LONG)
+		dst[nbits / BITS_PER_LONG] &= BITMAP_LAST_WORD_MASK(nbits);
+}
+
+/*
+ * On 32-bit systems bitmaps are represented as u32 arrays internally, and
+ * therefore conversion is not needed when copying data from/to arrays of u32.
+ */
+#if BITS_PER_LONG == 64
+extern void bitmap_from_arr32(unsigned long *bitmap, const u32 *buf,
+							unsigned int nbits);
+extern void bitmap_to_arr32(u32 *buf, const unsigned long *bitmap,
+							unsigned int nbits);
+#else
+#define bitmap_from_arr32(bitmap, buf, nbits)			\
+	bitmap_copy_clear_tail((unsigned long *) (bitmap),	\
+			(const unsigned long *) (buf), (nbits))
+#define bitmap_to_arr32(buf, bitmap, nbits)			\
+	bitmap_copy_clear_tail((unsigned long *) (buf),		\
+			(const unsigned long *) (bitmap), (nbits))
+#endif
+
 static inline int bitmap_and(unsigned long *dst, const unsigned long *src1,
 			const unsigned long *src2, unsigned int nbits)
 {

include/linux/build_bug.h

@@ -8,7 +8,6 @@
 #define __BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
 #define BUILD_BUG_ON_ZERO(e) (0)
-#define BUILD_BUG_ON_NULL(e) ((void *)0)
 #define BUILD_BUG_ON_INVALID(e) (0)
 #define BUILD_BUG_ON_MSG(cond, msg) (0)
 #define BUILD_BUG_ON(condition) (0)
@@ -28,7 +27,6 @@
  * aren't permitted).
  */
 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))
-#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:(-!!(e)); }))
 
 /*
  * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the

include/linux/compiler-clang.h

@@ -19,3 +19,11 @@
 
 #define randomized_struct_fields_start	struct {
 #define randomized_struct_fields_end	};
+
+/* all clang versions usable with the kernel support KASAN ABI version 5 */
+#define KASAN_ABI_VERSION 5
+
+/* emulate gcc's __SANITIZE_ADDRESS__ flag */
+#if __has_feature(address_sanitizer)
+#define __SANITIZE_ADDRESS__
+#endif

include/linux/cpumask.h

@@ -640,7 +640,7 @@ static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
 /**
  * cpumask_size - size to allocate for a 'struct cpumask' in bytes
  */
-static inline size_t cpumask_size(void)
+static inline unsigned int cpumask_size(void)
 {
 	return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long);
 }

include/linux/cpuset.h

@@ -112,7 +112,7 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return task_spread_slab(current);
 }
 
-extern int current_cpuset_is_being_rebound(void);
+extern bool current_cpuset_is_being_rebound(void);
 
 extern void rebuild_sched_domains(void);
 
@@ -247,9 +247,9 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return 0;
 }
 
-static inline int current_cpuset_is_being_rebound(void)
+static inline bool current_cpuset_is_being_rebound(void)
 {
-	return 0;
+	return false;
 }
 
 static inline void rebuild_sched_domains(void)

include/linux/crash_dump.h

@@ -2,13 +2,13 @@
 #ifndef LINUX_CRASH_DUMP_H
 #define LINUX_CRASH_DUMP_H
 
-#ifdef CONFIG_CRASH_DUMP
 #include <linux/kexec.h>
 #include <linux/proc_fs.h>
 #include <linux/elf.h>
 
 #include <asm/pgtable.h> /* for pgprot_t */
 
+#ifdef CONFIG_CRASH_DUMP
 #define ELFCORE_ADDR_MAX	(-1ULL)
 #define ELFCORE_ADDR_ERR	(-2ULL)
 
@@ -52,13 +52,13 @@ void vmcore_cleanup(void);
  * has passed the elf core header address on command line.
  *
  * This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
- * return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of
- * previous kernel.
+ * return true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic
+ * of previous kernel.
  */
 
-static inline int is_kdump_kernel(void)
+static inline bool is_kdump_kernel(void)
 {
-	return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
+	return elfcorehdr_addr != ELFCORE_ADDR_MAX;
 }
 
 /* is_vmcore_usable() checks if the kernel is booting after a panic and
@@ -89,7 +89,7 @@ extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
 extern void unregister_oldmem_pfn_is_ram(void);
 
 #else /* !CONFIG_CRASH_DUMP */
-static inline int is_kdump_kernel(void) { return 0; }
+static inline bool is_kdump_kernel(void) { return 0; }
 #endif /* CONFIG_CRASH_DUMP */
 
 extern unsigned long saved_max_pfn;

include/linux/genl_magic_func.h

@@ -2,6 +2,7 @@
 #ifndef GENL_MAGIC_FUNC_H
 #define GENL_MAGIC_FUNC_H
 
+#include <linux/build_bug.h>
 #include <linux/genl_magic_struct.h>
 
 /*
@@ -132,17 +133,6 @@ static void dprint_array(const char *dir, int nla_type,
  * use one static buffer for parsing of nested attributes */
 static struct nlattr *nested_attr_tb[128];
 
-#ifndef BUILD_BUG_ON
-/* Force a compilation error if condition is true */
-#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
-/* Force a compilation error if condition is true, but also produce a
-   result (of value 0 and type size_t), so the expression can be used
-   e.g. in a structure initializer (or where-ever else comma expressions
-   aren't permitted). */
-#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
-#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
-#endif
-
 #undef GENL_struct
 #define GENL_struct(tag_name, tag_number, s_name, s_fields)		\
 /* *_from_attrs functions are static, but potentially unused */		\

include/linux/ioport.h

@@ -265,7 +265,7 @@ extern struct resource * __devm_request_region(struct device *dev,
 extern void __devm_release_region(struct device *dev, struct resource *parent,
 				  resource_size_t start, resource_size_t n);
 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
-extern int iomem_is_exclusive(u64 addr);
+extern bool iomem_is_exclusive(u64 addr);
 
 extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,

include/linux/kallsyms.h

@@ -167,7 +167,7 @@ static inline int kallsyms_show_value(void)
 
 static inline void print_ip_sym(unsigned long ip)
 {
-	printk("[<%p>] %pS\n", (void *) ip, (void *) ip);
+	printk("[<%px>] %pS\n", (void *) ip, (void *) ip);
 }
 
 #endif /*_LINUX_KALLSYMS_H*/

include/linux/kasan.h

@@ -11,8 +11,6 @@ struct task_struct;
 
 #ifdef CONFIG_KASAN
 
-#define KASAN_SHADOW_SCALE_SHIFT 3
-
 #include <asm/kasan.h>
 #include <asm/pgtable.h>
 
@@ -56,14 +54,14 @@ void kasan_poison_object_data(struct kmem_cache *cache, void *object);
 void kasan_init_slab_obj(struct kmem_cache *cache, const void *object);
 
 void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags);
-void kasan_kfree_large(const void *ptr);
-void kasan_poison_kfree(void *ptr);
+void kasan_kfree_large(void *ptr, unsigned long ip);
+void kasan_poison_kfree(void *ptr, unsigned long ip);
 void kasan_kmalloc(struct kmem_cache *s, const void *object, size_t size,
 		  gfp_t flags);
 void kasan_krealloc(const void *object, size_t new_size, gfp_t flags);
 
 void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags);
-bool kasan_slab_free(struct kmem_cache *s, void *object);
+bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip);
 
 struct kasan_cache {
 	int alloc_meta_offset;
@@ -108,8 +106,8 @@ static inline void kasan_init_slab_obj(struct kmem_cache *cache,
 				const void *object) {}
 
 static inline void kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags) {}
-static inline void kasan_kfree_large(const void *ptr) {}
-static inline void kasan_poison_kfree(void *ptr) {}
+static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
+static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
 static inline void kasan_kmalloc(struct kmem_cache *s, const void *object,
 				size_t size, gfp_t flags) {}
 static inline void kasan_krealloc(const void *object, size_t new_size,
@@ -117,7 +115,8 @@ static inline void kasan_krealloc(const void *object, size_t new_size,
 
 static inline void kasan_slab_alloc(struct kmem_cache *s, void *object,
 				   gfp_t flags) {}
-static inline bool kasan_slab_free(struct kmem_cache *s, void *object)
+static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
+				   unsigned long ip)
 {
 	return false;
 }

include/linux/lockref.h

@@ -44,7 +44,7 @@ extern void lockref_mark_dead(struct lockref *);
 extern int lockref_get_not_dead(struct lockref *);
 
 /* Must be called under spinlock for reliable results */
-static inline int __lockref_is_dead(const struct lockref *l)
+static inline bool __lockref_is_dead(const struct lockref *l)
 {
 	return ((int)l->count < 0);
 }

include/linux/memblock.h

@@ -332,8 +332,8 @@ void memblock_enforce_memory_limit(phys_addr_t memory_limit);
 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
 void memblock_mem_limit_remove_map(phys_addr_t limit);
 bool memblock_is_memory(phys_addr_t addr);
-int memblock_is_map_memory(phys_addr_t addr);
-int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
+bool memblock_is_map_memory(phys_addr_t addr);
+bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
 bool memblock_is_reserved(phys_addr_t addr);
 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
 

include/linux/module.h

@@ -491,7 +491,7 @@ extern struct mutex module_mutex;
 /* FIXME: It'd be nice to isolate modules during init, too, so they
    aren't used before they (may) fail.  But presently too much code
    (IDE & SCSI) require entry into the module during init.*/
-static inline int module_is_live(struct module *mod)
+static inline bool module_is_live(struct module *mod)
 {
 	return mod->state != MODULE_STATE_GOING;
 }

include/linux/mutex.h

@@ -138,9 +138,9 @@ extern void __mutex_init(struct mutex *lock, const char *name,
  * mutex_is_locked - is the mutex locked
  * @lock: the mutex to be queried
  *
- * Returns 1 if the mutex is locked, 0 if unlocked.
+ * Returns true if the mutex is locked, false if unlocked.
  */
-static inline int mutex_is_locked(struct mutex *lock)
+static inline bool mutex_is_locked(struct mutex *lock)
 {
 	/*
 	 * XXX think about spin_is_locked

include/linux/pipe_fs_i.h

@@ -167,10 +167,9 @@ void pipe_lock(struct pipe_inode_info *);
 void pipe_unlock(struct pipe_inode_info *);
 void pipe_double_lock(struct pipe_inode_info *, struct pipe_inode_info *);
 
-extern unsigned int pipe_max_size, pipe_min_size;
+extern unsigned int pipe_max_size;
 extern unsigned long pipe_user_pages_hard;
 extern unsigned long pipe_user_pages_soft;
-int pipe_proc_fn(struct ctl_table *, int, void __user *, size_t *, loff_t *);
 
 /* Drop the inode semaphore and wait for a pipe event, atomically */
 void pipe_wait(struct pipe_inode_info *pipe);
@@ -191,6 +190,6 @@ long pipe_fcntl(struct file *, unsigned int, unsigned long arg);
 struct pipe_inode_info *get_pipe_info(struct file *file);
 
 int create_pipe_files(struct file **, int);
-unsigned int round_pipe_size(unsigned int size);
+unsigned int round_pipe_size(unsigned long size);
 
 #endif

include/linux/sched.h

@@ -1497,6 +1497,11 @@ static inline struct thread_info *task_thread_info(struct task_struct *task)
 extern struct task_struct *find_task_by_vpid(pid_t nr);
 extern struct task_struct *find_task_by_pid_ns(pid_t nr, struct pid_namespace *ns);
 
+/*
+ * find a task by its virtual pid and get the task struct
+ */
+extern struct task_struct *find_get_task_by_vpid(pid_t nr);
+
 extern int wake_up_state(struct task_struct *tsk, unsigned int state);
 extern int wake_up_process(struct task_struct *tsk);
 extern void wake_up_new_task(struct task_struct *tsk);

include/linux/sysctl.h

@@ -51,9 +51,6 @@ extern int proc_dointvec_minmax(struct ctl_table *, int,
 extern int proc_douintvec_minmax(struct ctl_table *table, int write,
 				 void __user *buffer, size_t *lenp,
 				 loff_t *ppos);
-extern int proc_dopipe_max_size(struct ctl_table *table, int write,
-				void __user *buffer, size_t *lenp,
-				loff_t *ppos);
 extern int proc_dointvec_jiffies(struct ctl_table *, int,
 				 void __user *, size_t *, loff_t *);
 extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,

include/linux/uuid.h

@@ -17,6 +17,7 @@
 #define _LINUX_UUID_H_
 
 #include <uapi/linux/uuid.h>
+#include <linux/string.h>
 
 #define UUID_SIZE 16