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-rw-r--r--linux-user/syscall.c6
-rw-r--r--linux-user/syscall_defs.h6
2 files changed, 7 insertions, 5 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index a2f605dec4..499415ad81 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -197,8 +197,10 @@
 //#define DEBUG_ERESTARTSYS
 
 //#include <linux/msdos_fs.h>
-#define	VFAT_IOCTL_READDIR_BOTH		_IOR('r', 1, struct linux_dirent [2])
-#define	VFAT_IOCTL_READDIR_SHORT	_IOR('r', 2, struct linux_dirent [2])
+#define VFAT_IOCTL_READDIR_BOTH \
+    _IOC(_IOC_READ, 'r', 1, (sizeof(struct linux_dirent) + 256) * 2)
+#define VFAT_IOCTL_READDIR_SHORT \
+    _IOC(_IOC_READ, 'r', 2, (sizeof(struct linux_dirent) + 256) * 2)
 
 #undef _syscall0
 #undef _syscall1
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index a5ce487dcc..98b09ee6d6 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -441,7 +441,7 @@ struct target_dirent64 {
 	int64_t		d_off;
 	unsigned short	d_reclen;
 	unsigned char	d_type;
-	char		d_name[256];
+	char		d_name[];
 };
 
 
@@ -2714,7 +2714,7 @@ struct linux_dirent {
     long            d_ino;
     unsigned long   d_off;
     unsigned short  d_reclen;
-    char            d_name[256]; /* We must not include limits.h! */
+    char            d_name[];
 };
 
 struct linux_dirent64 {
@@ -2722,7 +2722,7 @@ struct linux_dirent64 {
     int64_t         d_off;
     unsigned short  d_reclen;
     unsigned char   d_type;
-    char            d_name[256];
+    char            d_name[];
 };
 
 struct target_mq_attr {