diff options
| author | Yury Norov | 2020-01-30 22:16:40 -0800 |
|---|---|---|
| committer | Linus Torvalds | 2020-01-31 10:30:40 -0800 |
| commit | d5767057c9a76a29f073dad66b7fa12a90e8c748 (patch) | |
| tree | 4b954476bbc5e06322a1fb514238e066714d1121 /include/uapi | |
| parent | 4e456fee215677584cafa7f67298a76917e89c64 (diff) | |
uapi: rename ext2_swab() to swab() and share globally in swab.h
ext2_swab() is defined locally in lib/find_bit.c However it is not
specific to ext2, neither to bitmaps.
There are many potential users of it, so rename it to just swab() and
move to include/uapi/linux/swab.h
ABI guarantees that size of unsigned long corresponds to BITS_PER_LONG,
therefore drop unneeded cast.
Link: http://lkml.kernel.org/r/20200103202846.21616-1-yury.norov@gmail.com
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/swab.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/uapi/linux/swab.h b/include/uapi/linux/swab.h index 23cd84868cc3..fa7f97da5b76 100644 --- a/include/uapi/linux/swab.h +++ b/include/uapi/linux/swab.h @@ -4,6 +4,7 @@ #include <linux/types.h> #include <linux/compiler.h> +#include <asm/bitsperlong.h> #include <asm/swab.h> /* @@ -132,6 +133,15 @@ static inline __attribute_const__ __u32 __fswahb32(__u32 val) __fswab64(x)) #endif +static __always_inline unsigned long __swab(const unsigned long y) +{ +#if BITS_PER_LONG == 64 + return __swab64(y); +#else /* BITS_PER_LONG == 32 */ + return __swab32(y); +#endif +} + /** * __swahw32 - return a word-swapped 32-bit value * @x: value to wordswap |