Index: sys/arm/linux/linux.h
===================================================================
--- sys/arm/linux/linux.h
+++ sys/arm/linux/linux.h
@@ -94,7 +94,7 @@
 
 typedef struct {
 	l_int		val[2];
-} l_fsid_t;
+} __packed l_fsid_t;
 
 typedef struct {
 	l_time_t	tv_sec;
@@ -138,7 +138,7 @@
 struct l_rlimit {
 	l_ulong rlim_cur;
 	l_ulong rlim_max;
-};
+} __packed;
 
 /* mmap options */
 #define	LINUX_MAP_SHARED	0x0001
@@ -162,7 +162,7 @@
 struct l_timespec {
 	l_time_t	tv_sec;
 	l_long		tv_nsec;
-};
+} __packed;
 
 struct l_newstat {
 	l_ushort	st_dev;
@@ -182,7 +182,7 @@
 	struct l_timespec	st_ctim;
 	l_ulong		__unused4;
 	l_ulong		__unused5;
-};
+} __packed;
 
 struct l_stat {
 	l_ushort	st_dev;
@@ -220,7 +220,7 @@
 	struct l_timespec	st_mtim;
 	struct l_timespec	st_ctim;
 	l_ulonglong	st_ino;
-};
+} __packed;
 
 struct l_statfs64 { 
         l_int           f_type; 
@@ -233,7 +233,7 @@
         l_fsid_t        f_fsid;
         l_int           f_namelen;
         l_int           f_spare[6];
-};
+} __packed;
 
 #define	LINUX_NSIG_WORDS	2
 
@@ -264,20 +264,20 @@
 	l_osigset_t	lsa_mask;
 	l_ulong		lsa_flags;
 	void	(*lsa_restorer)(void);
-} l_osigaction_t;
+} __packed l_osigaction_t;
 
 typedef struct {
 	l_handler_t	lsa_handler;
 	l_ulong		lsa_flags;
 	void	(*lsa_restorer)(void);
 	l_sigset_t	lsa_mask;
-} l_sigaction_t;
+} __packed l_sigaction_t;
 
 typedef struct {
 	void		*ss_sp;
 	l_int		ss_flags;
 	l_size_t	ss_size;
-} l_stack_t;
+} __packed l_stack_t;
 
 /* The Linux sigcontext, pretty much a standard 386 trapframe. */
 struct l_sigcontext {
@@ -303,7 +303,7 @@
 	l_int		sc_387;
 	l_int		sc_mask;
 	l_int		sc_cr2;
-};
+} __packed;
 
 struct l_ucontext {
 	l_ulong		uc_flags;
@@ -311,7 +311,7 @@
 	l_stack_t	uc_stack;
 	struct l_sigcontext	uc_mcontext;
 	l_sigset_t	uc_sigmask;
-};
+} __packed;
 
 #define	LINUX_SI_MAX_SIZE	128
 #define	LINUX_SI_PAD_SIZE	((LINUX_SI_MAX_SIZE/sizeof(l_int)) - 3)
@@ -331,7 +331,7 @@
 		struct {
 			l_pid_t		_pid;
 			l_uid_t		_uid;
-		} _kill;
+		} __packed _kill;
 
 		struct {
 			l_timer_t	_tid;
@@ -339,13 +339,13 @@
 			char		_pad[sizeof(l_uid_t) - sizeof(l_int)];
 			l_sigval_t	_sigval;
 			l_int		_sys_private;
-		} _timer;
+		} __packed _timer;
 
 		struct {
 			l_pid_t		_pid;		/* sender's pid */
 			l_uid_t		_uid;		/* sender's uid */
 			l_sigval_t	_sigval;
-		} _rt;
+		} __packed _rt;
 
 		struct {
 			l_pid_t		_pid;		/* which child */
@@ -353,18 +353,18 @@
 			l_int		_status;	/* exit code */
 			l_clock_t	_utime;
 			l_clock_t	_stime;
-		} _sigchld;
+		} __packed _sigchld;
 
 		struct {
 			l_uintptr_t	_addr;	/* Faulting insn/memory ref. */
-		} _sigfault;
+		} __packed _sigfault;
 
 		struct {
 			l_long		_band;	/* POLL_IN,POLL_OUT,POLL_MSG */
 			l_int		_fd;
-		} _sigpoll;
+		} __packed _sigpoll;
 	} _sifields;
-} l_siginfo_t;
+} __packed l_siginfo_t;
 
 #define	lsi_pid		_sifields._kill._pid
 #define	lsi_uid		_sifields._kill._uid
@@ -384,17 +384,17 @@
 struct l_fpreg {
 	u_int16_t	significand[4];
 	u_int16_t	exponent;
-};
+} __packed;
 
 struct l_fpxreg {
 	u_int16_t	significand[4];
 	u_int16_t	exponent;
 	u_int16_t	padding[3];
-};
+} __packed;
 
 struct l_xmmreg {
 	u_int32_t	element[4];
-};
+} __packed;
 
 struct l_fpstate {
 	/* Regular FPU environment */
@@ -416,7 +416,7 @@
 	struct l_fpxreg		_fxsr_st[8];	/* reg data is ignored. */
 	struct l_xmmreg		_xmm[8];
 	u_int32_t		padding[56];
-};
+} __packed;
 
 /*
  * We make the stack look like Linux expects it when calling a signal
@@ -430,7 +430,7 @@
 	struct l_fpstate	sf_fpstate;
 	l_uint			sf_extramask[LINUX_NSIG_WORDS-1];
 	l_handler_t		sf_handler;
-};
+} __packed;
 
 struct l_rt_sigframe {
 	l_int			sf_sig;
@@ -439,7 +439,7 @@
 	l_siginfo_t		sf_si;
 	struct l_ucontext 	sf_sc;
 	l_handler_t 		sf_handler;
-};
+} __packed;
 
 extern struct sysentvec linux_sysvec;
 
@@ -456,7 +456,7 @@
 	l_ushort	*array;
 	struct l_seminfo	*__buf;
 	void		*__pad;
-};
+} __packed;
 
 struct l_ipc_perm {
 	l_key_t		key;
@@ -511,7 +511,7 @@
 	u_char		irq;
 	u_char		dma;
 	u_char		port;
-};
+} __packed;
 
 #define	LINUX_IFHWADDRLEN	6
 #define	LINUX_IFNAMSIZ		16
@@ -534,7 +534,7 @@
 		char		ifru_slave[LINUX_IFNAMSIZ];
 		l_caddr_t	ifru_data;
 	} ifr_ifru;
-};
+} __packed;
 
 #define	ifr_name	ifr_ifrn.ifrn_name	/* Interface name */
 #define	ifr_hwaddr	ifr_ifru.ifru_hwaddr	/* MAC address */
@@ -558,7 +558,7 @@
 	l_int		fd;
 	l_short		events;
 	l_short		revents;
-};
+} __packed;
 
 struct l_user_desc {
 	l_uint		entry_number;
Index: sys/arm/linux/linux_ipc64.h
===================================================================
--- sys/arm/linux/linux_ipc64.h
+++ sys/arm/linux/linux_ipc64.h
@@ -54,7 +54,7 @@
 	l_ushort	__pad2;
 	l_ulong		__unused1;
 	l_ulong		__unused2;
-};
+} __packed;
 
 /*
  * The msqid64_ds structure for i386 architecture.
@@ -81,7 +81,7 @@
 	l_pid_t		msg_lrpid;	/* last receive pid */
 	l_ulong		__unused4;
 	l_ulong		__unused5;
-};
+} __packed;
 
 /*
  * The semid64_ds structure for i386 architecture.
@@ -102,7 +102,7 @@
 	l_ulong		sem_nsems;	/* no. of semaphores in array */
 	l_ulong		__unused3;
 	l_ulong		__unused4;
-};
+} __packed;
 
 /*
  * The shmid64_ds structure for i386 architecture.
@@ -128,7 +128,7 @@
 	l_ulong		shm_nattch;	/* no. of current attaches */
 	l_ulong		__unused4;
 	l_ulong		__unused5;
-};
+} __packed;
 
 struct l_shminfo64 {
 	l_ulong   	shmmax;
@@ -140,6 +140,6 @@
 	l_ulong   	__unused2;
 	l_ulong   	__unused3;
 	l_ulong   	__unused4;
-};
+} __packed;
 
 #endif /* !_ARM_LINUX_LINUX_IPC64_H_ */