Fix the following sparse warning:
fs/btrfs/send.c:518:51: warning: incorrect type in argument 2 (different address spaces)
fs/btrfs/send.c:518:51: expected char const [noderef] <asn:1>*<noident>
fs/btrfs/send.c:518:51: got char *
We can safely use (const char __user *) with set_fs(KERNEL_DS)
__force added to avoid sparse-all warning:
fs/btrfs/send.c:518:40: warning: cast adds address space to expression (<asn:1>)
Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
---
This is untested.
fs/btrfs/send.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 6528aa6..b67e12e 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -515,7 +515,8 @@ static int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off)
set_fs(KERNEL_DS);
while (pos < len) {
- ret = vfs_write(filp, (char *)buf + pos, len - pos, off);
+ ret = vfs_write(filp, (__force const char __user *)buf + pos,
+ len - pos, off);
/* TODO handle that correctly */
/*if (ret == -ERESTARTSYS) {
continue;
--
1.8.4.5
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