From: Lukas Funke lukas.funke@weidmueller.com
Add 'for_each_set_bitrange' (from Linux kernel) in order to iterate over each set bitrange of a bitmap. This becomes handy if one wants to generate a cpu list i.e. for isolcpu or nohz_full.
Signed-off-by: Lukas Funke lukas.funke@weidmueller.com Reviewed-by: Simon Glass sjg@chromium.org ---
(no changes since v1)
include/linux/bitmap.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 0a8503af9f..9714533078 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -159,6 +159,13 @@ static inline unsigned long find_first_bit(const unsigned long *addr, unsigned l (bit) < (size); \ (bit) = find_next_bit((addr), (size), (bit) + 1))
+#define for_each_set_bitrange(b, e, addr, size) \ + for ((b) = 0; \ + (b) = find_next_bit((addr), (size), b), \ + (e) = find_next_zero_bit((addr), (size), (b) + 1), \ + (b) < (size); \ + (b) = (e) + 1) + static inline unsigned long bitmap_find_next_zero_area(unsigned long *map, unsigned long size,