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authorYury Norov <yury.norov@gmail.com>2022-09-18 06:07:15 +0300
committerYury Norov <yury.norov@gmail.com>2022-09-26 22:19:12 +0300
commit97848c10f9f8a8ce4296b149d06cab424eba05b3 (patch)
tree963487077ade5afd1c1cea2372aa1bb68084127d /lib/bitmap.c
parente3783c805db29c8cb3e8dcc8160f6449da1100e3 (diff)
downloadlinux-97848c10f9f8a8ce4296b149d06cab424eba05b3.tar.xz
lib/bitmap: remove bitmap_ord_to_pos
Now that we have find_nth_bit(), we can drop bitmap_ord_to_pos(). Signed-off-by: Yury Norov <yury.norov@gmail.com>
Diffstat (limited to 'lib/bitmap.c')
-rw-r--r--lib/bitmap.c36
1 files changed, 3 insertions, 33 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 3fc2e338ec30..1c81413c51f8 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -969,36 +969,6 @@ static int bitmap_pos_to_ord(const unsigned long *buf, unsigned int pos, unsigne
}
/**
- * bitmap_ord_to_pos - find position of n-th set bit in bitmap
- * @buf: pointer to bitmap
- * @ord: ordinal bit position (n-th set bit, n >= 0)
- * @nbits: number of valid bit positions in @buf
- *
- * Map the ordinal offset of bit @ord in @buf to its position in @buf.
- * Value of @ord should be in range 0 <= @ord < weight(buf). If @ord
- * >= weight(buf), returns @nbits.
- *
- * If for example, just bits 4 through 7 are set in @buf, then @ord
- * values 0 through 3 will get mapped to 4 through 7, respectively,
- * and all other @ord values returns @nbits. When @ord value 3
- * gets mapped to (returns) @pos value 7 in this example, that means
- * that the 3rd set bit (starting with 0th) is at position 7 in @buf.
- *
- * The bit positions 0 through @nbits-1 are valid positions in @buf.
- */
-unsigned int bitmap_ord_to_pos(const unsigned long *buf, unsigned int ord, unsigned int nbits)
-{
- unsigned int pos;
-
- for (pos = find_first_bit(buf, nbits);
- pos < nbits && ord;
- pos = find_next_bit(buf, nbits, pos + 1))
- ord--;
-
- return pos;
-}
-
-/**
* bitmap_remap - Apply map defined by a pair of bitmaps to another bitmap
* @dst: remapped result
* @src: subset to be remapped
@@ -1047,7 +1017,7 @@ void bitmap_remap(unsigned long *dst, const unsigned long *src,
if (n < 0 || w == 0)
set_bit(oldbit, dst); /* identity map */
else
- set_bit(bitmap_ord_to_pos(new, n % w, nbits), dst);
+ set_bit(find_nth_bit(new, nbits, n % w), dst);
}
}
EXPORT_SYMBOL(bitmap_remap);
@@ -1086,7 +1056,7 @@ int bitmap_bitremap(int oldbit, const unsigned long *old,
if (n < 0 || w == 0)
return oldbit;
else
- return bitmap_ord_to_pos(new, n % w, bits);
+ return find_nth_bit(new, bits, n % w);
}
EXPORT_SYMBOL(bitmap_bitremap);
@@ -1210,7 +1180,7 @@ void bitmap_onto(unsigned long *dst, const unsigned long *orig,
* The following code is a more efficient, but less
* obvious, equivalent to the loop:
* for (m = 0; m < bitmap_weight(relmap, bits); m++) {
- * n = bitmap_ord_to_pos(orig, m, bits);
+ * n = find_nth_bit(orig, bits, m);
* if (test_bit(m, orig))
* set_bit(n, dst);
* }