From 8cffde7329734c17ee2eeec84944abbf4a0f23f3 Mon Sep 17 00:00:00 2001 From: Michael Tokarev Date: Thu, 10 Mar 2011 17:03:41 +0300 Subject: [PATCH] get rid of private bitmap functions in block/sheepdog.c, use generic ones 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 Acked-by: MORITA Kazutaka Signed-off-by: Aurelien Jarno --- block/sheepdog.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/block/sheepdog.c b/block/sheepdog.c index a54e0dee31..98946d72b7 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; -- 2.11.0