Merge branch 'akpm' (patches from Andrew)

Merge third patch-bomb from Andrew Morton:
 "We're pretty much done over here - I'm still waiting for a nouveau
  merge so I can cleanly finish up Christoph's dma-mapping rework.

   - bunch of small misc stuff

   - fold abs64() into abs(), remove abs64()

   - new_valid_dev() cleanups

   - binfmt_elf_fdpic feature work"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (24 commits)
  fs/binfmt_elf_fdpic.c: provide NOMMU loader for regular ELF binaries
  fs/stat.c: remove unnecessary new_valid_dev() check
  fs/reiserfs/namei.c: remove unnecessary new_valid_dev() check
  fs/nilfs2/namei.c: remove unnecessary new_valid_dev() check
  fs/ncpfs/dir.c: remove unnecessary new_valid_dev() check
  fs/jfs: remove unnecessary new_valid_dev() checks
  fs/hpfs/namei.c: remove unnecessary new_valid_dev() check
  fs/f2fs/namei.c: remove unnecessary new_valid_dev() check
  fs/ext2/namei.c: remove unnecessary new_valid_dev() check
  fs/exofs/namei.c: remove unnecessary new_valid_dev() check
  fs/btrfs/inode.c: remove unnecessary new_valid_dev() check
  fs/9p: remove unnecessary new_valid_dev() checks
  include/linux/kdev_t.h: old/new_valid_dev() can return bool
  include/linux/kdev_t.h: remove unused huge_valid_dev()
  kmap_atomic_to_page() has no users, remove it
  drivers/scsi/cxgbi: fix build with EXTRA_CFLAGS
  dma: remove external references to dma_supported
  Documentation/sysctl/vm.txt: fix misleading code reference of overcommit_memory
  remove abs64()
  kernel.h: make abs() work with 64-bit types
  ...

3 files changed, 23 insertions, 29 deletions

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 6aefcd0031a6..bb3f3297062a 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -78,7 +78,6 @@ static inline void __kunmap_atomic(void *addr)
 }
 
 #define kmap_atomic_pfn(pfn)	kmap_atomic(pfn_to_page(pfn))
-#define kmap_atomic_to_page(ptr)	virt_to_page(ptr)
 
 #define kmap_flush_unused()	do {} while(0)
 #endif
diff --git a/include/linux/kdev_t.h b/include/linux/kdev_t.h
index c838abe3ee0a..052c7b32cc91 100644
--- a/include/linux/kdev_t.h
+++ b/include/linux/kdev_t.h
@@ -20,7 +20,7 @@
 	})
 
 /* acceptable for old filesystems */
-static inline int old_valid_dev(dev_t dev)
+static inline bool old_valid_dev(dev_t dev)
 {
 	return MAJOR(dev) < 256 && MINOR(dev) < 256;
 }
@@ -35,7 +35,7 @@ static inline dev_t old_decode_dev(u16 val)
 	return MKDEV((val >> 8) & 255, val & 255);
 }
 
-static inline int new_valid_dev(dev_t dev)
+static inline bool new_valid_dev(dev_t dev)
 {
 	return 1;
 }
@@ -54,11 +54,6 @@ static inline dev_t new_decode_dev(u32 dev)
 	return MKDEV(major, minor);
 }
 
-static inline int huge_valid_dev(dev_t dev)
-{
-	return 1;
-}
-
 static inline u64 huge_encode_dev(dev_t dev)
 {
 	return new_encode_dev(dev);
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2c13f747ac2e..350dfb08aee3 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -200,28 +200,28 @@ extern int _cond_resched(void);
 
 #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
 
-/*
- * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
- * input types abs() returns a signed long.
- * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
- * for those.
+/**
+ * abs - return absolute value of an argument
+ * @x: the value.  If it is unsigned type, it is converted to signed type first
+ *   (s64, long or int depending on its size).
+ *
+ * Return: an absolute value of x.  If x is 64-bit, macro's return type is s64,
+ *   otherwise it is signed long.
  */
-#define abs(x) ({						\
-		long ret;					\
-		if (sizeof(x) == sizeof(long)) {		\
-			long __x = (x);				\
-			ret = (__x < 0) ? -__x : __x;		\
-		} else {					\
-			int __x = (x);				\
-			ret = (__x < 0) ? -__x : __x;		\
-		}						\
-		ret;						\
-	})
-
-#define abs64(x) ({				\
-		s64 __x = (x);			\
-		(__x < 0) ? -__x : __x;		\
-	})
+#define abs(x) __builtin_choose_expr(sizeof(x) == sizeof(s64), ({	\
+		s64 __x = (x);						\
+		(__x < 0) ? -__x : __x;					\
+	}), ({								\
+		long ret;						\
+		if (sizeof(x) == sizeof(long)) {			\
+			long __x = (x);					\
+			ret = (__x < 0) ? -__x : __x;			\
+		} else {						\
+			int __x = (x);					\
+			ret = (__x < 0) ? -__x : __x;			\
+		}							\
+		ret;							\
+	}))
 
 /**
  * reciprocal_scale - "scale" a value into range [0, ep_ro)