From 164590a60fd685399da259ac41b338d9a0b9d6c0 Mon Sep 17 00:00:00 2001 From: Juan Quintela Date: Tue, 8 Oct 2013 16:12:17 +0200 Subject: [PATCH] bitmap: Add bitmap_zero_extend operation Signed-off-by: Juan Quintela Reviewed-by: Eric Blake Reviewed-by: Orit Wasserman --- include/qemu/bitmap.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h index afdd257d8f..1babd5d812 100644 --- a/include/qemu/bitmap.h +++ b/include/qemu/bitmap.h @@ -220,4 +220,13 @@ unsigned long bitmap_find_next_zero_area(unsigned long *map, unsigned long nr, unsigned long align_mask); +static inline unsigned long *bitmap_zero_extend(unsigned long *old, + long old_nbits, long new_nbits) +{ + long new_len = BITS_TO_LONGS(new_nbits) * sizeof(unsigned long); + unsigned long *new = g_realloc(old, new_len); + bitmap_clear(new, old_nbits, new_nbits - old_nbits); + return new; +} + #endif /* BITMAP_H */ -- 2.11.0