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-rw-r--r--fs/btrfs/ioctl.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e0a061d..c4f17e4 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -282,8 +282,9 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
- list_for_each_entry(device, &fs_info->fs_devices->devices, dev_list) {
+ rcu_read_lock();
+ list_for_each_entry_rcu(device, &fs_info->fs_devices->devices,
+ dev_list) {
if (!device->bdev)
continue;
q = bdev_get_queue(device->bdev);
@@ -293,7 +294,7 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
minlen);
}
}
- mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ rcu_read_unlock();
if (!num_devices)
return -EOPNOTSUPP;
@@ -1279,7 +1280,6 @@ static noinline int copy_to_sk(struct btrfs_root *root,
int nritems;
int i;
int slot;
- int found = 0;
int ret = 0;
leaf = path->nodes[0];
@@ -1326,7 +1326,7 @@ static noinline int copy_to_sk(struct btrfs_root *root,
item_off, item_len);
*sk_offset += item_len;
}
- found++;
+ (*num_found)++;
if (*num_found >= sk->nr_items)
break;
@@ -1345,7 +1345,6 @@ advance_key:
} else
ret = 1;
overflow:
- *num_found += found;
return ret;
}
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