On Thu, Mar 10, 2011 at 05:03:41PM +0300, Michael Tokarev wrote:
> qemu now has generic bitmap functions,
> so don't redefine them in sheepdog.c,
> use common header instead. A small cleanup.
>
> Here's only one function which is actually
> used in sheepdog and gets replaced with
> a generic one (simplified):
>
> - static inline int test_bit(int nr, const volatile unsigned long *addr)
> + static inline int test_bit(int nr, const unsigned long *addr)
> {
> - return ((1UL << (nr % BITS_PER_LONG))
> & ((unsigned long*)addr)[nr / BITS_PER_LONG])) != 0;
> + return 1UL & (addr[nr / BITS_PER_LONG] >> (nr & (BITS_PER_LONG-1)));
> }
>
> The body is equivalent, but the argument is not: there's
> "volatile" in there. Why it is used for - I'm not sure.
>
> Signed-off-by: Michael Tokarev <m...@tls.msk.ru>
Thanks, applied.
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index a54e0de..98946d7 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -13,6 +13,7 @@
> #include "qemu-error.h"
> #include "qemu_socket.h"
> #include "block_int.h"
> +#include "bitops.h"
>
> #define SD_PROTO_VER 0x01
>
> @@ -1829,20 +1830,6 @@ static int sd_snapshot_delete(BlockDriverState *bs,
> const char *snapshot_id)
> return 0;
> }
>
> -#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
> -#define BITS_PER_BYTE 8
> -#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
> -#define DECLARE_BITMAP(name,bits) \
> - unsigned long name[BITS_TO_LONGS(bits)]
> -
> -#define BITS_PER_LONG (BITS_PER_BYTE * sizeof(long))
> -
> -static inline int test_bit(unsigned int nr, const unsigned long *addr)
> -{
> - return ((1UL << (nr % BITS_PER_LONG)) &
> - (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;
> -}
> -
> static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
> {
> BDRVSheepdogState *s = bs->opaque;
>
>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
aurel...@aurel32.net http://www.aurel32.net
