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| author | Yury Norov <yury.norov@gmail.com> | 2020-01-30 22:16:40 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-24 08:00:31 +0200 |
| commit | 4eb9d5bc7065b263edb2afee53c5d6cdf2487164 (patch) | |
| tree | 10adb43348c59780f57bdeed09a228a3aa9a749d /lib/find_bit.c | |
| parent | 2ee871239dbc8a25e0379c94894807d09d8db3fd (diff) | |
| download | linux-stable-4eb9d5bc7065b263edb2afee53c5d6cdf2487164.tar.gz linux-stable-4eb9d5bc7065b263edb2afee53c5d6cdf2487164.tar.bz2 linux-stable-4eb9d5bc7065b263edb2afee53c5d6cdf2487164.zip | |
uapi: rename ext2_swab() to swab() and share globally in swab.h
[ Upstream commit d5767057c9a76a29f073dad66b7fa12a90e8c748 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib/find_bit.c')
| -rw-r--r-- | lib/find_bit.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/lib/find_bit.c b/lib/find_bit.c index 6ed74f78380c..883ef3755a1c 100644 --- a/lib/find_bit.c +++ b/lib/find_bit.c @@ -133,18 +133,6 @@ EXPORT_SYMBOL(find_last_bit); #ifdef __BIG_ENDIAN -/* include/linux/byteorder does not support "unsigned long" type */ -static inline unsigned long ext2_swab(const unsigned long y) -{ -#if BITS_PER_LONG == 64 - return (unsigned long) __swab64((u64) y); -#elif BITS_PER_LONG == 32 - return (unsigned long) __swab32((u32) y); -#else -#error BITS_PER_LONG not defined -#endif -} - #if !defined(find_next_bit_le) || !defined(find_next_zero_bit_le) static unsigned long _find_next_bit_le(const unsigned long *addr, unsigned long nbits, unsigned long start, unsigned long invert) @@ -157,7 +145,7 @@ static unsigned long _find_next_bit_le(const unsigned long *addr, tmp = addr[start / BITS_PER_LONG] ^ invert; /* Handle 1st word. */ - tmp &= ext2_swab(BITMAP_FIRST_WORD_MASK(start)); + tmp &= swab(BITMAP_FIRST_WORD_MASK(start)); start = round_down(start, BITS_PER_LONG); while (!tmp) { @@ -168,7 +156,7 @@ static unsigned long _find_next_bit_le(const unsigned long *addr, tmp = addr[start / BITS_PER_LONG] ^ invert; } - return min(start + __ffs(ext2_swab(tmp)), nbits); + return min(start + __ffs(swab(tmp)), nbits); } #endif |