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bitmap: Add bitmap_zero_extend operation 

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
This commit is contained in:
Juan Quintela 2013-10-08 16:12:17 +02:00
parent e8a97cafc4
commit 164590a60f
1 changed files with 9 additions and 0 deletions
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9
include/qemu/bitmap.h
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@ -220,4 +220,13 @@ unsigned long bitmap_find_next_zero_area(unsigned long *map,
unsigned long nr, unsigned long nr,
unsigned long align_mask); 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 */ #endif /* BITMAP_H */