diff options
author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2015-02-12 15:02:07 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 18:54:14 -0800 |
commit | df1d80a9eb16d98002673f68a7ebbe881f6e6946 (patch) | |
tree | 354e5cd242fdd024e258f40460887d231d48e2aa /crypto/wp512.c | |
parent | b26ad5836c3a0a9d456eb60b9f841ca15403ee59 (diff) |
lib/bitmap.c: simplify bitmap_pos_to_ord
The ordinal of a set bit is simply the number of set bits before it;
counting those doesn't need to be done one bit at a time. While at it,
update the parameters to unsigned int.
It is not completely unthinkable that gcc would see pos as compile-time
constant 0 in one of the uses of bitmap_pos_to_ord. Since the static
inline frontend bitmap_weight doesn't handle nbits==0 correctly (it would
behave exactly as if nbits==BITS_PER_LONG), use __bitmap_weight.
Alternatively, the last line could be spelled bitmap_weight(buf, pos+1)-1,
but this is simpler.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'crypto/wp512.c')
0 files changed, 0 insertions, 0 deletions