From e827d00a709d79032a10953cb9ca80a8b77a77ab Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@google.com>
Date: Mon, 8 Mar 2021 09:54:24 +0100
Subject: [PATCH] ANDROID: GKI: hack up fs/sysfs/file.c to prevent GENKSYMS
 change

In commit cb1f69d53ac8 ("sysfs: Add sysfs_emit and sysfs_emit_at to
format sysfs output") in 4.19.179, a #include <linux/mm.h> addition is
added to the fs/sysfs/file.c file, before sysfs.h is included in the
build.  This ends up causing a previously "UNKNOWN" symbol type
definition of struct vm_operations_struct to become "known" which
propagates to a CRC change for some sysfs symbol definitions.

To prevent all this mess, add a simple #ifndef to prevent the mm.h file
from being included when running the symbol tool, and all is fine.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibcc22bedc4f39d2ef49a52ebd7962a8dba5b0583
---
 fs/sysfs/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 5166eb40917d..57d90b7b0d8e 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -15,7 +15,9 @@
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/seq_file.h>
+#ifndef __GENKSYMS__
 #include <linux/mm.h>
+#endif
 
 #include "sysfs.h"
 #include "../kernfs/kernfs-internal.h"