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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-09 21:05:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-09 21:05:13 -0800
commitbd4f203e433387d39be404b67ad02acf6f76b7bc (patch)
treea77a5b393cb5a1f9aa13274079e777a16b3fc490 /include
parente6604ecb70d4b1dbc0372c6518b51c25c4b135a1 (diff)
parent1bde925d235478cd5e70a7d9f94f3d8eb7c6362b (diff)
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 ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/highmem.h1
-rw-r--r--include/linux/kdev_t.h9
-rw-r--r--include/linux/kernel.h42
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)