Index: uspace/lib/c/include/adt/generic_field.h
===================================================================
--- uspace/lib/c/include/adt/generic_field.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/adt/generic_field.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -91,5 +91,5 @@
 			} \
 			field->items[field->next] = value; \
-			++field->next; \
+			field->next++; \
 			field->items[field->next] = NULL; \
 			return field->next - 1; \
@@ -108,5 +108,5 @@
 			int index; \
 			field->magic = 0; \
-			for (index = 0; index < field->next; ++ index) { \
+			for (index = 0; index < field->next; index++) { \
 				if (field->items[index]) \
 					free(field->items[index]); \
Index: uspace/lib/c/include/errno.h
===================================================================
--- uspace/lib/c/include/errno.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/errno.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -83,8 +83,6 @@
 #define ENOTCONN	(-10057)
 
-/** The requested operation was not performed.
- *  Try again later.
- */
-#define TRY_AGAIN	(-11002)
+/** The requested operation was not performed. Try again later. */
+#define EAGAIN		(-11002)
 
 /** No data.
Index: uspace/lib/c/include/ipc/vfs.h
===================================================================
--- uspace/lib/c/include/ipc/vfs.h	(revision eac610e188a3fe299c1cae932e3524e7415b491d)
+++ uspace/lib/c/include/ipc/vfs.h	(revision 2c5cefa897b181e123f9677daf6fc62cb602cd82)
@@ -36,6 +36,7 @@
 #define LIBC_IPC_VFS_H_
 
+#include <ipc/ipc.h>
 #include <sys/types.h>
-#include <ipc/ipc.h>
+#include <bool.h>
 
 #define FS_NAME_MAXLEN  20
@@ -55,4 +56,6 @@
 	/** Unique identifier of the fs. */
 	char name[FS_NAME_MAXLEN + 1];
+	bool concurrent_read_write;
+	bool write_retains_size;
 } vfs_info_t;