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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2013-11-22 12:40:58 +0100 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 15:22:22 +0200 |
| commit | 44a4d551846b8c61aa430b9432c1fcdf88444708 (patch) | |
| tree | 8188189bed59234fdf943702ebb55c9c17106215 /drivers/block/drbd/drbd_receiver.c | |
| parent | 35b5ed5bbac2432acdfce1d9dec8dbf8fe7d60dd (diff) | |
| download | op-kernel-dev-44a4d551846b8c61aa430b9432c1fcdf88444708.zip op-kernel-dev-44a4d551846b8c61aa430b9432c1fcdf88444708.tar.gz | |
drbd: refactor use of first_peer_device()
Reduce the number of calls to first_peer_device(). Instead, call
first_peer_device() just once to assign a local variable peer_device.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_receiver.c')
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index be0c376..bb1434d 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -2857,8 +2857,10 @@ static void drbd_uuid_dump(struct drbd_device *device, char *text, u64 *uuid, -1091 requires proto 91 -1096 requires proto 96 */ -static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_hold(local) +static int drbd_uuid_compare(struct drbd_device *const device, int *rule_nr) __must_hold(local) { + struct drbd_peer_device *const peer_device = first_peer_device(device); + struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL; u64 self, peer; int i, j; @@ -2884,7 +2886,7 @@ static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_ho if (device->p_uuid[UI_BITMAP] == (u64)0 && device->ldev->md.uuid[UI_BITMAP] != (u64)0) { - if (first_peer_device(device)->connection->agreed_pro_version < 91) + if (connection->agreed_pro_version < 91) return -1091; if ((device->ldev->md.uuid[UI_BITMAP] & ~((u64)1)) == (device->p_uuid[UI_HISTORY_START] & ~((u64)1)) && @@ -2907,7 +2909,7 @@ static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_ho if (device->ldev->md.uuid[UI_BITMAP] == (u64)0 && device->p_uuid[UI_BITMAP] != (u64)0) { - if (first_peer_device(device)->connection->agreed_pro_version < 91) + if (connection->agreed_pro_version < 91) return -1091; if ((device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (device->p_uuid[UI_BITMAP] & ~((u64)1)) && @@ -2940,7 +2942,7 @@ static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_ho case 1: /* self_pri && !peer_pri */ return 1; case 2: /* !self_pri && peer_pri */ return -1; case 3: /* self_pri && peer_pri */ - dc = test_bit(RESOLVE_CONFLICTS, &first_peer_device(device)->connection->flags); + dc = test_bit(RESOLVE_CONFLICTS, &connection->flags); return dc ? -1 : 1; } } @@ -2953,14 +2955,14 @@ static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_ho *rule_nr = 51; peer = device->p_uuid[UI_HISTORY_START] & ~((u64)1); if (self == peer) { - if (first_peer_device(device)->connection->agreed_pro_version < 96 ? + if (connection->agreed_pro_version < 96 ? (device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (device->p_uuid[UI_HISTORY_START + 1] & ~((u64)1)) : peer + UUID_NEW_BM_OFFSET == (device->p_uuid[UI_BITMAP] & ~((u64)1))) { /* The last P_SYNC_UUID did not get though. Undo the last start of resync as sync source modifications of the peer's UUIDs. */ - if (first_peer_device(device)->connection->agreed_pro_version < 91) + if (connection->agreed_pro_version < 91) return -1091; device->p_uuid[UI_BITMAP] = device->p_uuid[UI_HISTORY_START]; @@ -2990,14 +2992,14 @@ static int drbd_uuid_compare(struct drbd_device *device, int *rule_nr) __must_ho *rule_nr = 71; self = device->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1); if (self == peer) { - if (first_peer_device(device)->connection->agreed_pro_version < 96 ? + if (connection->agreed_pro_version < 96 ? (device->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1)) == (device->p_uuid[UI_HISTORY_START] & ~((u64)1)) : self + UUID_NEW_BM_OFFSET == (device->ldev->md.uuid[UI_BITMAP] & ~((u64)1))) { /* The last P_SYNC_UUID did not get though. Undo the last start of resync as sync source modifications of our UUIDs. */ - if (first_peer_device(device)->connection->agreed_pro_version < 91) + if (connection->agreed_pro_version < 91) return -1091; __drbd_uuid_set(device, UI_BITMAP, device->ldev->md.uuid[UI_HISTORY_START]); |
