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-rw-r--r--kernel/printk/printk.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1ce770687ea8..7a6e69441f75 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -519,14 +519,13 @@ struct devkmsg_user {
char buf[8192];
};
-static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
- unsigned long count, loff_t pos)
+static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from)
{
char *buf, *line;
int i;
int level = default_message_loglevel;
int facility = 1; /* LOG_USER */
- size_t len = iov_length(iv, count);
+ size_t len = iocb->ki_nbytes;
ssize_t ret = len;
if (len > LOG_LINE_MAX)
@@ -535,13 +534,10 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
if (buf == NULL)
return -ENOMEM;
- line = buf;
- for (i = 0; i < count; i++) {
- if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {
- ret = -EFAULT;
- goto out;
- }
- line += iv[i].iov_len;
+ buf[len] = '\0';
+ if (copy_from_iter(buf, len, from) != len) {
+ kfree(buf);
+ return -EFAULT;
}
/*
@@ -567,10 +563,8 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
line = endp;
}
}
- line[len] = '\0';
printk_emit(facility, level, NULL, 0, "%s", line);
-out:
kfree(buf);
return ret;
}
@@ -802,7 +796,7 @@ static int devkmsg_release(struct inode *inode, struct file *file)
const struct file_operations kmsg_fops = {
.open = devkmsg_open,
.read = devkmsg_read,
- .aio_write = devkmsg_writev,
+ .write_iter = devkmsg_write,
.llseek = devkmsg_llseek,
.poll = devkmsg_poll,
.release = devkmsg_release,