From c4db805fac81095e41d9c01c91653e745e36e342 Mon Sep 17 00:00:00 2001
From: Victor Golovanenko <drygdryg2014@yandex.com>
Date: Mon, 21 Dec 2020 06:34:24 +0300
Subject: [PATCH] Fixed Kernel compilation 5.10 Adapt code due set_fs() removal
 See torvalds/linux@f56e65d

---
 os_dep/osdep_service.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/os_dep/osdep_service.c b/os_dep/osdep_service.c
index 82a37d2..6ebd769 100644
--- a/os_dep/osdep_service.c
+++ b/os_dep/osdep_service.c
@@ -2139,15 +2139,19 @@ static int isFileReadable(const char *path, u32 *sz)
 {
 	struct file *fp;
 	int ret = 0;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	mm_segment_t oldfs;
+	#endif
 	char buf;
 
 	fp = filp_open(path, O_RDONLY, 0);
 	if (IS_ERR(fp))
 		ret = PTR_ERR(fp);
 	else {
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		oldfs = get_fs();
 		set_fs(KERNEL_DS);
+		#endif
 
 		if (1 != readFile(fp, &buf, 1))
 			ret = PTR_ERR(fp);
@@ -2159,8 +2163,9 @@ static int isFileReadable(const char *path, u32 *sz)
 			*sz = i_size_read(fp->f_dentry->d_inode);
 			#endif
 		}
-
+		#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 		set_fs(oldfs);
+		#endif
 		filp_close(fp, NULL);
 	}
 	return ret;
@@ -2176,7 +2181,9 @@ static int isFileReadable(const char *path, u32 *sz)
 static int retriveFromFile(const char *path, u8 *buf, u32 sz)
 {
 	int ret = -1;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	mm_segment_t oldfs;
+	#endif
 	struct file *fp;
 
 	if (path && buf) {
@@ -2184,10 +2191,14 @@ static int retriveFromFile(const char *path, u8 *buf, u32 sz)
 		if (0 == ret) {
 			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
 
+			#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			oldfs = get_fs();
 			set_fs(KERNEL_DS);
+			#endif
 			ret = readFile(fp, buf, sz);
+			#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			set_fs(oldfs);
+			#endif
 			closeFile(fp);
 
 			RTW_INFO("%s readFile, ret:%d\n", __FUNCTION__, ret);
@@ -2211,7 +2222,9 @@ static int retriveFromFile(const char *path, u8 *buf, u32 sz)
 static int storeToFile(const char *path, u8 *buf, u32 sz)
 {
 	int ret = 0;
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 	mm_segment_t oldfs;
+	#endif
 	struct file *fp;
 
 	if (path && buf) {
@@ -2219,10 +2232,14 @@ static int storeToFile(const char *path, u8 *buf, u32 sz)
 		if (0 == ret) {
 			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
 
+			#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			oldfs = get_fs();
 			set_fs(KERNEL_DS);
+			#endif
 			ret = writeFile(fp, buf, sz);
+			#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 10, 0))
 			set_fs(oldfs);
+			#endif
 			closeFile(fp);
 
 			RTW_INFO("%s writeFile, ret:%d\n", __FUNCTION__, ret);