ipc: unbreak 32-bit shmctl/semctl/msgctl
31a985f "ipc: use __ARCH_WANT_IPC_PARSE_VERSION in ipc/util.h" would
choose the implementation of ipc_parse_version() based on a symbol
defined in <asm/unistd.h>.
But it failed to also include this header and thus broke
IPC_64-passing 32-bit userspace because the flag wasn't masked out
properly anymore and the command not understood.
Include <linux/unistd.h> to give the architecture a chance to ask for
the no-no-op ipc_parse_version().
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/ipc/util.h b/ipc/util.h
index ab3ebf2..764b51a 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -10,6 +10,7 @@
#ifndef _IPC_UTIL_H
#define _IPC_UTIL_H
+#include <linux/unistd.h>
#include <linux/err.h>
#define SEQ_MULTIPLIER (IPCMNI)