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-rw-r--r--drivers/char/mem.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 3c6670cf90..7c359cc406 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -383,6 +383,7 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma)
return 0;
}
+#ifdef CONFIG_DEVPORT
static ssize_t read_port(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
@@ -424,6 +425,7 @@ static ssize_t write_port(struct file *file, const char __user *buf,
*ppos = i;
return tmp-buf;
}
+#endif
static ssize_t read_null(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
@@ -544,7 +546,7 @@ static unsigned long get_unmapped_area_zero(struct file *file,
}
/* Otherwise flags & MAP_PRIVATE: with no shmem object beneath it */
- return current->mm->get_unmapped_area(file, addr, len, pgoff, flags);
+ return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags);
#else
return -ENOSYS;
#endif
@@ -653,12 +655,14 @@ static const struct file_operations null_fops = {
.uring_cmd = uring_cmd_null,
};
-static const struct file_operations __maybe_unused port_fops = {
+#ifdef CONFIG_DEVPORT
+static const struct file_operations port_fops = {
.llseek = memory_lseek,
.read = read_port,
.write = write_port,
.open = open_port,
};
+#endif
static const struct file_operations zero_fops = {
.llseek = zero_lseek,