From: Miao Xie <miaox@cn.fujitsu.com>
To: <linux-btrfs@vger.kernel.org>
Subject: [PATCH 01/18] Btrfs: cleanup unused num_can_discard in fs_devices
Date: Wed, 3 Sep 2014 21:35:30 +0800 [thread overview]
Message-ID: <1409751347-5296-1-git-send-email-miaox@cn.fujitsu.com> (raw)
The member variants - num_can_discard - of fs_devices structure
are set, but no one use them to do anything. so remove them.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
fs/btrfs/volumes.c | 16 ++--------------
fs/btrfs/volumes.h | 1 -
2 files changed, 2 insertions(+), 15 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e9676a4..483fc6d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -720,8 +720,6 @@ static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
fs_devices->rw_devices--;
}
- if (device->can_discard)
- fs_devices->num_can_discard--;
if (device->missing)
fs_devices->missing_devices--;
@@ -828,10 +826,8 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
}
q = bdev_get_queue(bdev);
- if (blk_queue_discard(q)) {
+ if (blk_queue_discard(q))
device->can_discard = 1;
- fs_devices->num_can_discard++;
- }
device->bdev = bdev;
device->in_fs_metadata = 0;
@@ -1835,8 +1831,7 @@ void btrfs_rm_dev_replace_srcdev(struct btrfs_fs_info *fs_info,
if (!fs_devices->seeding)
fs_devices->rw_devices++;
}
- if (srcdev->can_discard)
- fs_devices->num_can_discard--;
+
if (srcdev->bdev) {
fs_devices->open_devices--;
@@ -1886,8 +1881,6 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
fs_info->fs_devices->open_devices--;
}
fs_info->fs_devices->num_devices--;
- if (tgtdev->can_discard)
- fs_info->fs_devices->num_can_discard++;
next_device = list_entry(fs_info->fs_devices->devices.next,
struct btrfs_device, dev_list);
@@ -2008,7 +2001,6 @@ static int btrfs_prepare_sprout(struct btrfs_root *root)
fs_devices->num_devices = 0;
fs_devices->open_devices = 0;
fs_devices->missing_devices = 0;
- fs_devices->num_can_discard = 0;
fs_devices->rotating = 0;
fs_devices->seed = seed_devices;
@@ -2200,8 +2192,6 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
root->fs_info->fs_devices->open_devices++;
root->fs_info->fs_devices->rw_devices++;
root->fs_info->fs_devices->total_devices++;
- if (device->can_discard)
- root->fs_info->fs_devices->num_can_discard++;
root->fs_info->fs_devices->total_rw_bytes += device->total_bytes;
spin_lock(&root->fs_info->free_chunk_lock);
@@ -2371,8 +2361,6 @@ int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
list_add(&device->dev_list, &fs_info->fs_devices->devices);
fs_info->fs_devices->num_devices++;
fs_info->fs_devices->open_devices++;
- if (device->can_discard)
- fs_info->fs_devices->num_can_discard++;
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
*device_out = device;
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index e894ac6..37f8bff 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -124,7 +124,6 @@ struct btrfs_fs_devices {
u64 rw_devices;
u64 missing_devices;
u64 total_rw_bytes;
- u64 num_can_discard;
u64 total_devices;
struct block_device *latest_bdev;
--
1.9.3
next reply other threads:[~2014-09-03 13:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-03 13:35 Miao Xie [this message]
2014-09-03 13:35 ` [PATCH 02/18] Btrfs: cleanup double assignment of device->bytes_used when device replace finishes Miao Xie
2014-09-03 13:35 ` [PATCH 03/18] Btrfs: fix unprotected assignment of the target device Miao Xie
2014-09-03 13:35 ` [PATCH 04/18] Btrfs: fix wrong disk size when writing super blocks Miao Xie
2014-09-03 13:35 ` [PATCH 05/18] Btrfs: fix wrong device bytes_used in the super block Miao Xie
2014-09-03 13:35 ` [PATCH 06/18] Btrfs: Fix wrong free_chunk_space assignment during removing a device Miao Xie
2014-09-03 13:35 ` [PATCH 07/18] Btrfs: fix unprotected device->bytes_used update Miao Xie
2014-09-03 13:35 ` [PATCH 08/18] Btrfs: update free_chunk_space during allocting a new chunk Miao Xie
2014-09-03 13:35 ` [PATCH 09/18] Btrfs: fix unprotected device's variants on 32bits machine Miao Xie
2014-09-03 13:35 ` [PATCH 10/18] Btrfs: fix unprotected system chunk array insertion Miao Xie
2014-09-03 13:35 ` [PATCH 11/18] Btrfs: fix unprotected device list access when getting the fs information Miao Xie
2014-09-03 13:35 ` [PATCH 12/18] Btrfs: Fix misuse of chunk mutex Miao Xie
2014-09-11 15:39 ` Chris Mason
2014-09-03 13:35 ` [PATCH 13/18] Btrfs: fix unprotected device list access when cloning fs devices Miao Xie
2014-09-03 13:35 ` [PATCH 14/18] Btrfs: fix use-after-free problem of the device during device replace Miao Xie
2014-09-03 13:35 ` [PATCH 15/18] Btrfs: make the logic of source device removing more clear Miao Xie
2014-09-03 13:35 ` [PATCH 16/18] Btrfs: stop mounting the fs if the non-ENOENT errors happen when opening seed fs Miao Xie
2014-09-03 13:35 ` [PATCH 17/18] Btrfs: move the missing device to its own fs device list Miao Xie
2014-09-03 13:35 ` [PATCH 18/18] Btrfs: modify rw_devices counter under chunk_mutex context Miao Xie
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