From: Christoph Hellwig <hch@lst.de>
Date: Fri, 1 Sep 2017 15:39:20 +0000 (+0200)
Subject: mconsole: switch to kernel_read
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=21cb2559eb510dfbe9b5d0dd31605f44d2cd2891;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

mconsole: switch to kernel_read

Instead of playing with address limits.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index af326fb6510d..c4d162a94be9 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -148,12 +148,7 @@ void mconsole_proc(struct mc_request *req)
 	}
 
 	do {
-		loff_t pos = file->f_pos;
-		mm_segment_t old_fs = get_fs();
-		set_fs(KERNEL_DS);
-		len = vfs_read(file, buf, PAGE_SIZE - 1, &pos);
-		set_fs(old_fs);
-		file->f_pos = pos;
+		len = kernel_read(file, buf, PAGE_SIZE - 1, &file->f_pos);
 		if (len < 0) {
 			mconsole_reply(req, "Read of file failed", 1, 0);
 			goto out_free;