X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=fs%2Fautofs%2Fautofs_i.h;fp=fs%2Fautofs%2Fautofs_i.h;h=5057b9f0f8461029ae9afb4d321a7e64d0f91da4;hb=60182d4261ee3ac9eac5523a18f30f67f01b45b8;hp=9400a9f6318a0fab9ac95aeb12e84776a4ae4006;hpb=86e6fb0a081a618ef5f821ac40ef05d35b36b755;p=android-x86%2Fkernel.git

diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
index 9400a9f6318a..5057b9f0f846 100644
--- a/fs/autofs/autofs_i.h
+++ b/fs/autofs/autofs_i.h
@@ -26,6 +26,7 @@
 #include <linux/list.h>
 #include <linux/completion.h>
 #include <linux/file.h>
+#include <linux/magic.h>
 
 /* This is the range of ioctl() numbers we claim as ours */
 #define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
@@ -124,7 +125,8 @@ struct autofs_sb_info {
 
 static inline struct autofs_sb_info *autofs_sbi(struct super_block *sb)
 {
-	return (struct autofs_sb_info *)(sb->s_fs_info);
+	return sb->s_magic != AUTOFS_SUPER_MAGIC ?
+		NULL : (struct autofs_sb_info *)(sb->s_fs_info);
 }
 
 static inline struct autofs_info *autofs_dentry_ino(struct dentry *dentry)