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Subject[PATCH 11/17] btrfs: switch write_buf to kernel_write
Date
Instead of playing with the addressing limits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
---
fs/btrfs/send.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index b082210df9c8..24b989fd130c 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -539,33 +539,23 @@ static struct btrfs_path *alloc_path_for_send(void)
static int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off)
{
int ret;
- mm_segment_t old_fs;
u32 pos = 0;

- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
while (pos < len) {
- ret = vfs_write(filp, (__force const char __user *)buf + pos,
- len - pos, off);
+ ret = kernel_write(filp, buf + pos, len - pos, off);
/* TODO handle that correctly */
/*if (ret == -ERESTARTSYS) {
continue;
}*/
if (ret < 0)
- goto out;
+ return ret;
if (ret == 0) {
- ret = -EIO;
- goto out;
+ return -EIO;
}
pos += ret;
}

- ret = 0;
-
-out:
- set_fs(old_fs);
- return ret;
+ return 0;
}

static int tlv_put(struct send_ctx *sctx, u16 attr, const void *data, int len)
--
2.11.0
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