From: Paul Keith <javelinanddart@gmail.com>
Date: Fri, 2 Mar 2018 03:51:53 +0000 (+0100)
Subject: fs: sdfat: Add config option to register sdFAT for exFAT
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4d98b7365c9a773e7542d1c95f88a2ef4d8dbda8;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

fs: sdfat: Add config option to register sdFAT for exFAT

Change-Id: Id57abf0a4bd0b433fecc622eecb383cd4ea29d17
Signed-off-by: Paul Keith <javelinanddart@gmail.com>
---

diff --git a/fs/sdfat/Kconfig b/fs/sdfat/Kconfig
index 2ab3e9921b8c..3fe86e72c40b 100644
--- a/fs/sdfat/Kconfig
+++ b/fs/sdfat/Kconfig
@@ -15,6 +15,13 @@ config SDFAT_FS
 	  To compile this as a module, choose M here: the module will be called
 	  sdfat_core and sdfat_fs.
 
+config SDFAT_USE_FOR_EXFAT
+	bool "Register sdFAT as exFAT"
+	default y
+	depends on SDFAT_FS && !EXFAT_FS
+	help
+	  If you want to register sdFAT as available for exFAT, say Y.
+
 config SDFAT_DELAYED_META_DIRTY
 	bool "Enable delayed metadata dirty"
 	default y
diff --git a/fs/sdfat/sdfat.c b/fs/sdfat/sdfat.c
index b25a0732125a..9d50d0ce72de 100644
--- a/fs/sdfat/sdfat.c
+++ b/fs/sdfat/sdfat.c
@@ -5051,6 +5051,20 @@ static struct file_system_type sdfat_fs_type = {
 	.fs_flags    = FS_REQUIRES_DEV,
 };
 
+#ifdef CONFIG_SDFAT_USE_FOR_EXFAT
+static struct file_system_type exfat_fs_type = {
+	.owner       = THIS_MODULE,
+	.name        = "exfat",
+	.mount       = sdfat_fs_mount,
+#ifdef CONFIG_SDFAT_DBG_IOCTL
+	.kill_sb    = sdfat_debug_kill_sb,
+#else
+	.kill_sb    = kill_block_super,
+#endif /* CONFIG_SDFAT_DBG_IOCTL */
+	.fs_flags    = FS_REQUIRES_DEV,
+};
+#endif /* CONFIG_SDFAT_USE_FOR_EXFAT */
+
 static int __init init_sdfat_fs(void)
 {
 	int err;
@@ -5089,6 +5103,14 @@ static int __init init_sdfat_fs(void)
 		goto error;
 	}
 
+#ifdef CONFIG_SDFAT_USE_FOR_EXFAT
+	err = register_filesystem(&exfat_fs_type);
+	if (err) {
+		pr_err("[SDFAT] failed to register for exfat filesystem\n");
+		goto error;
+	}
+#endif /* CONFIG_SDFAT_USE_FOR_EXFAT */
+
 	return 0;
 error:
 	sdfat_statistics_uninit();
@@ -5118,7 +5140,9 @@ static void __exit exit_sdfat_fs(void)
 
 	sdfat_destroy_inodecache();
 	unregister_filesystem(&sdfat_fs_type);
-
+#ifdef CONFIG_SDFAT_USE_FOR_EXFAT
+	unregister_filesystem(&exfat_fs_type);
+#endif /* CONFIG_SDFAT_USE_FOR_EXFAT */
 	fsapi_shutdown();
 }