diff mbox series

[01/11] fs: call file_{start,end}_write from __kernel_write

Message ID 20200508092222.2097-2-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/11] fs: call file_{start,end}_write from __kernel_write | expand

Commit Message

Christoph Hellwig May 8, 2020, 9:22 a.m. UTC 
We always need to take a reference on the file system we are writing
to.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/read_write.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/fs/read_write.c b/fs/read_write.c
index bbfa9b12b15eb..d5aaf3a4198b9 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -508,6 +508,7 @@  ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t
 	if (!(file->f_mode & FMODE_CAN_WRITE))
 		return -EINVAL;
 
+	file_start_write(file);
 	old_fs = get_fs();
 	set_fs(KERNEL_DS);
 	p = (__force const char __user *)buf;
@@ -520,6 +521,7 @@  ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t
 		add_wchar(current, ret);
 	}
 	inc_syscw(current);
+	file_end_write(file);
 	return ret;
 }
 EXPORT_SYMBOL(__kernel_write);