Allocate enough memory so that the returned pointer can be safely accessed as an array of unsigned long.
The actual bitmap size in units of bytes, as returned by bitmap_size, remains unchanged. Signed-off-by: Olaf Hering <[email protected]> --- tools/libs/ctrl/xc_bitops.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/libs/ctrl/xc_bitops.h b/tools/libs/ctrl/xc_bitops.h index 3d3a09772a..d6c5ea5138 100644 --- a/tools/libs/ctrl/xc_bitops.h +++ b/tools/libs/ctrl/xc_bitops.h @@ -21,7 +21,10 @@ static inline unsigned long bitmap_size(unsigned long nr_bits) static inline void *bitmap_alloc(unsigned long nr_bits) { - return calloc(1, bitmap_size(nr_bits)); + unsigned long longs; + + longs = (nr_bits + BITS_PER_LONG - 1) / BITS_PER_LONG; + return calloc(longs, sizeof(unsigned long)); } static inline void bitmap_set(void *addr, unsigned long nr_bits)
