Implement ->proc_read_buf() so procfs copies what is read to userspace
after it unpinned the entry.
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
arch/powerpc/kernel/proc_powerpc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c
index d083b4517065..46bc914d74b9 100644
--- a/arch/powerpc/kernel/proc_powerpc.c
+++ b/arch/powerpc/kernel/proc_powerpc.c
@@ -24,10 +24,10 @@ static loff_t page_map_seek(struct file *file, loff_t off, int whence)
return fixed_size_llseek(file, off, whence, PAGE_SIZE);
}
-static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes,
+static ssize_t page_map_read( struct file *file, char *buf, size_t nbytes,
loff_t *ppos)
{
- return simple_read_from_buffer(buf, nbytes, ppos,
+ return memory_read_from_buffer(buf, nbytes, ppos,
pde_data(file_inode(file)), PAGE_SIZE);
}
@@ -43,7 +43,7 @@ static int page_map_mmap( struct file *file, struct vm_area_struct *vma )
static const struct proc_ops page_map_proc_ops = {
.proc_lseek = page_map_seek,
- .proc_read = page_map_read,
+ .proc_read_buf = page_map_read,
.proc_mmap = page_map_mmap,
};
--
2.53.0