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path: root/drivers/char/mem.c
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Diffstat (limited to 'drivers/char/mem.c')
-rw-r--r--drivers/char/mem.c42
1 files changed, 3 insertions, 39 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index d6e9d081c8b1..67c3371723cc 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -807,44 +807,6 @@ static const struct file_operations oldmem_fops = {
};
#endif
-static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv,
- unsigned long count, loff_t pos)
-{
- char *line, *p;
- int i;
- ssize_t ret = -EFAULT;
- size_t len = iov_length(iv, count);
-
- line = kmalloc(len + 1, GFP_KERNEL);
- if (line == NULL)
- return -ENOMEM;
-
- /*
- * copy all vectors into a single string, to ensure we do
- * not interleave our log line with other printk calls
- */
- p = line;
- for (i = 0; i < count; i++) {
- if (copy_from_user(p, iv[i].iov_base, iv[i].iov_len))
- goto out;
- p += iv[i].iov_len;
- }
- p[0] = '\0';
-
- ret = printk("%s", line);
- /* printk can add a prefix */
- if (ret > len)
- ret = len;
-out:
- kfree(line);
- return ret;
-}
-
-static const struct file_operations kmsg_fops = {
- .aio_write = kmsg_writev,
- .llseek = noop_llseek,
-};
-
static const struct memdev {
const char *name;
umode_t mode;
@@ -863,7 +825,9 @@ static const struct memdev {
[7] = { "full", 0666, &full_fops, NULL },
[8] = { "random", 0666, &random_fops, NULL },
[9] = { "urandom", 0666, &urandom_fops, NULL },
- [11] = { "kmsg", 0, &kmsg_fops, NULL },
+#ifdef CONFIG_PRINTK
+ [11] = { "kmsg", 0644, &kmsg_fops, NULL },
+#endif
#ifdef CONFIG_CRASH_DUMP
[12] = { "oldmem", 0, &oldmem_fops, NULL },
#endif