Update UML target to 3.10 and various improvements

Updated target to 3.10.36.
Added mconsole exec patch.
Added pseudo-random MAC patch (from NetKit).

Signed-off-by: Markus Stenberg <markus.stenberg@iki.fi>
Reviewed-by: Steven Barth <steven@midlink.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41172 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/uml/Makefile

@@ -23,7 +23,7 @@ BOARDNAME:=User Mode Linux
 FEATURES:=ext4 audio
 MAINTAINER:=Florian Fainelli <florian@openwrt.org>
 
-LINUX_VERSION:=3.8.13
+LINUX_VERSION:=3.10.36
 
 include $(INCLUDE_DIR)/target.mk
 

target/linux/uml/config/x86_64

@@ -3,7 +3,6 @@ CONFIG_64BIT=y
 # CONFIG_ARCH_HAS_SC_SIGNALS is not set
 # CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_BKL=y
 CONFIG_BLK_DEV_COW_COMMON=y
 CONFIG_BLK_DEV_UBD=y
 CONFIG_BLK_DEV_UBD_SYNC=y
@@ -15,50 +14,54 @@ CONFIG_CPU_SUP_INTEL=y
 CONFIG_CRAMFS=y
 # CONFIG_CRASHLOG is not set
 CONFIG_CRC16=y
-# CONFIG_CRYPTO_AES_NI_INTEL is not set
 # CONFIG_CRYPTO_AES_X86_64 is not set
-# CONFIG_CRYPTO_BLOWFISH_X86_64 is not set
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
 # CONFIG_CRYPTO_SALSA20_X86_64 is not set
+CONFIG_CRYPTO_SHA1=y
 # CONFIG_CRYPTO_TWOFISH_X86_64 is not set
-# CONFIG_CRYPTO_TWOFISH_X86_64_3WAY is not set
 CONFIG_DEBUG_BUGVERBOSE=y
 CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_DECOMPRESS_BZIP2=y
 CONFIG_DECOMPRESS_GZIP=y
-CONFIG_DECOMPRESS_LZMA=y
 CONFIG_DEFAULT_CFQ=y
 # CONFIG_DEFAULT_DEADLINE is not set
 CONFIG_DEFAULT_IOSCHED="cfq"
 CONFIG_DEFCONFIG_LIST="arch/$ARCH/defconfig"
 CONFIG_DNOTIFY=y
-CONFIG_ELF_CORE=y
 # CONFIG_EARLY_PRINTK is not set
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS=y
+CONFIG_FS_MBCACHE=y
 CONFIG_GENERIC_BUG=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 # CONFIG_GENERIC_CPU is not set
+CONFIG_GENERIC_CPU_DEVICES=y
 CONFIG_GENERIC_FIND_FIRST_BIT=y
-CONFIG_GENERIC_FIND_LAST_BIT=y
+CONFIG_GENERIC_IO=y
-CONFIG_GENERIC_FIND_NEXT_BIT=y
+CONFIG_GENERIC_IRQ_SHOW=y
-CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
 # CONFIG_HAMRADIO is not set
+CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
 # CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
-# CONFIG_HAVE_GENERIC_HARDIRQS is not set
+CONFIG_HAVE_GENERIC_HARDIRQS=y
+CONFIG_HAVE_NET_DSA=y
+CONFIG_HAVE_UID16=y
 CONFIG_HOSTAUDIO=m
 CONFIG_HOSTFS=y
 # CONFIG_HPPFS is not set
+CONFIG_HZ_PERIODIC=y
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_INIT_ENV_ARG_LIMIT=128
 CONFIG_IOSCHED_CFQ=y
-CONFIG_IRQ_RELEASE_METHOD=y
+CONFIG_IRQ_WORK=y
 CONFIG_ISO9660_FS=y
 CONFIG_JBD=y
 CONFIG_JBD2=y
 CONFIG_KALLSYMS=y
-CONFIG_KALLSYMS_EXTRA_PASS=y
 CONFIG_KERNEL_STACK_ORDER=2
 CONFIG_LD_SCRIPT_STATIC=y
 CONFIG_LEGACY_PTYS=y
@@ -66,9 +69,9 @@ CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_MATOM is not set
 CONFIG_MCONSOLE=y
 # CONFIG_MCORE2 is not set
-# CONFIG_MINI_FO is not set
 CONFIG_MK8=y
 # CONFIG_MMAPPER is not set
+CONFIG_MODULES_USE_ELF_RELA=y
 # CONFIG_MPSC is not set
 CONFIG_NAMESPACES=y
 CONFIG_NEED_PER_CPU_KM=y
@@ -85,8 +88,8 @@ CONFIG_POSIX_MQUEUE=y
 CONFIG_POSIX_MQUEUE_SYSCTL=y
 # CONFIG_PREEMPT_RCU is not set
 # CONFIG_PRINT_QUOTA_WARNING is not set
-CONFIG_PROC_PAGE_MONITOR=y
 # CONFIG_PROCESSOR_SELECT is not set
+CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_PTY_CHAN=y
 CONFIG_QFMT_V1=y
 CONFIG_QFMT_V2=y
@@ -94,13 +97,13 @@ CONFIG_QUOTA=y
 CONFIG_QUOTACTL=y
 # CONFIG_QUOTA_NETLINK_INTERFACE is not set
 CONFIG_QUOTA_TREE=y
+# CONFIG_RCU_STALL_COMMON is not set
 CONFIG_RD_BZIP2=y
 CONFIG_RD_GZIP=y
 CONFIG_RELAY=y
 # CONFIG_RWSEM_GENERIC_SPINLOCK is not set
 CONFIG_RWSEM_XCHGADD_ALGORITHM=y
 # CONFIG_SCSI_DMA is not set
-CONFIG_SMP_BROKEN=y
 CONFIG_SOFT_WATCHDOG=m
 CONFIG_SOUND=m
 CONFIG_SOUND_OSS_CORE=y
@@ -112,15 +115,18 @@ CONFIG_SSL_CHAN="pty"
 CONFIG_STATIC_LINK=y
 CONFIG_STDERR_CONSOLE=y
 CONFIG_STDIO_CONSOLE=y
+CONFIG_TICK_CPU_ACCOUNTING=y
 # CONFIG_TRACE_IRQFLAGS_SUPPORT is not set
 CONFIG_TTY_CHAN=y
 CONFIG_UID16=y
+CONFIG_UIDGID_CONVERTED=y
 CONFIG_UML=y
 CONFIG_UML_NET=y
 CONFIG_UML_NET_DAEMON=y
 CONFIG_UML_NET_ETHERTAP=y
 CONFIG_UML_NET_MCAST=y
 # CONFIG_UML_NET_PCAP is not set
+# CONFIG_UML_NET_RANDOM_MAC is not set
 CONFIG_UML_NET_SLIP=y
 CONFIG_UML_NET_SLIRP=y
 CONFIG_UML_NET_TUNTAP=y
@@ -129,19 +135,22 @@ CONFIG_UML_RANDOM=y
 CONFIG_UML_SOUND=m
 CONFIG_UML_WATCHDOG=m
 CONFIG_UML_X86=y
+# CONFIG_USB_ARCH_HAS_EHCI is not set
+# CONFIG_USB_ARCH_HAS_OHCI is not set
+# CONFIG_USB_ARCH_HAS_XHCI is not set
 # CONFIG_USER_NS is not set
 CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_WATCHDOG_CORE=y
 # CONFIG_X86_32 is not set
+CONFIG_X86_64=y
 CONFIG_X86_CMOV=y
-# CONFIG_X86_CMPXCHG is not set
+CONFIG_X86_CMPXCHG64=y
-CONFIG_X86_CPU=y
 CONFIG_X86_INTEL_USERCOPY=y
 CONFIG_X86_INTERNODE_CACHE_SHIFT=6
 CONFIG_X86_L1_CACHE_SHIFT=6
-CONFIG_X86_MINIMUM_CPU_FAMILY=3
+CONFIG_X86_MINIMUM_CPU_FAMILY=64
 CONFIG_X86_TSC=y
 CONFIG_X86_USE_PPRO_CHECKSUM=y
-CONFIG_X86_WP_WORKS_OK=y
-CONFIG_X86_XADD=y
 CONFIG_XTERM_CHAN=y
+CONFIG_ZLIB_INFLATE=y
 CONFIG_ZONE_DMA_FLAG=0

target/linux/uml/patches-3.10/101-mconsole-exec.patch

@@ -0,0 +1,223 @@
+#
+# Minimalist mconsole exec patch 
+#
+# 3.10 version (with bit more synchronous behavior) by fingon at iki dot fi
+# Adaptation to kernel 3.3.8 made by David Fernández (david at dit.upm.es) for 
+# Starting point: mconsole-exec-2.6.30.patch for kernel 2.6.30
+# Author of original patch: Paolo Giarrusso, aka Blaisorblade 
+#                           (http://www.user-mode-linux.org/~blaisorblade)
+#
+# Known misfeatures:
+#
+# - If output is too long, blocks (and breaks horribly) 
+# (this misfeature from 3.10 patches, when minimalizing the patch;
+#  workaround: redirect to a shared filesystem if long output is expected)
+#
+# - Nothing useful is done with stdin
+#
+diff --git a/arch/um/drivers/mconsole.h b/arch/um/drivers/mconsole.h
+index 8b22535..77cc5f7 100644
+--- a/arch/um/drivers/mconsole.h
++++ b/arch/um/drivers/mconsole.h
+@@ -85,6 +85,7 @@ extern void mconsole_cad(struct mc_request *req);
+ extern void mconsole_stop(struct mc_request *req);
+ extern void mconsole_go(struct mc_request *req);
+ extern void mconsole_log(struct mc_request *req);
++extern void mconsole_exec(struct mc_request *req);
+ extern void mconsole_proc(struct mc_request *req);
+ extern void mconsole_stack(struct mc_request *req);
+ 
+diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
+index 3df3bd5..307bf75 100644
+--- a/arch/um/drivers/mconsole_kern.c
++++ b/arch/um/drivers/mconsole_kern.c
+@@ -4,6 +4,7 @@
+  * Licensed under the GPL
+  */
+ 
++#include "linux/kmod.h"
+ #include <linux/console.h>
+ #include <linux/ctype.h>
+ #include <linux/string.h>
+@@ -24,6 +25,7 @@
+ #include <linux/fs.h>
+ #include <linux/mount.h>
+ #include <linux/file.h>
++#include <linux/completion.h>
+ #include <asm/uaccess.h>
+ #include <asm/switch_to.h>
+ 
+@@ -121,6 +123,59 @@ void mconsole_log(struct mc_request *req)
+ 	mconsole_reply(req, "", 0, 0);
+ }
+ 
++void mconsole_exec(struct mc_request *req)
++{
++  struct subprocess_info *sub_info;
++  int res, len;
++  struct file *out;
++  char buf[MCONSOLE_MAX_DATA];
++
++  char *envp[] = {
++    "HOME=/", "TERM=linux",
++    "PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin",
++    NULL
++  };
++  char *argv[] = {
++    "/bin/sh", "-c",
++    req->request.data + strlen("exec "),
++    NULL
++  };
++
++  sub_info = call_usermodehelper_setup("/bin/sh", argv, envp, GFP_ATOMIC, NULL, NULL, NULL);
++  if (sub_info == NULL) {
++    mconsole_reply(req, "call_usermodehelper_setup failed", 1, 0);
++    return;
++  }
++  res = call_usermodehelper_stdoutpipe(sub_info, &out);
++  if (res < 0) {
++    kfree(sub_info);
++    mconsole_reply(req, "call_usermodehelper_stdoutpipe failed", 1, 0);
++    return;
++  }
++
++  res = call_usermodehelper_exec(sub_info, UMH_WAIT_PROC);
++  if (res < 0) {
++    kfree(sub_info);
++    mconsole_reply(req, "call_usermodehelper_exec failed", 1, 0);
++    return;
++  }
++
++  for (;;) {
++    len = out->f_op->read(out, buf, sizeof(buf), &out->f_pos);
++    if (len < 0) {
++      mconsole_reply(req, "reading output failed", 1, 0);
++      break;
++    }
++    if (len == 0)
++      break;
++    mconsole_reply_len(req, buf, len, 0, 1);
++  }
++  fput(out);
++
++  mconsole_reply_len(req, NULL, 0, 0, 0);
++}
++
++
+ void mconsole_proc(struct mc_request *req)
+ {
+ 	struct vfsmount *mnt = task_active_pid_ns(current)->proc_mnt;
+@@ -187,6 +242,7 @@ void mconsole_proc(struct mc_request *req)
+     stop - pause the UML; it will do nothing until it receives a 'go' \n\
+     go - continue the UML after a 'stop' \n\
+     log <string> - make UML enter <string> into the kernel log\n\
++    exec <string> - pass <string> to /bin/sh -c synchronously\n\
+     proc <file> - returns the contents of the UML's /proc/<file>\n\
+     stack <pid> - returns the stack of the specified pid\n\
+ "
+diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
+index 9920982..3ed0d32 100644
+--- a/arch/um/drivers/mconsole_user.c
++++ b/arch/um/drivers/mconsole_user.c
+@@ -30,6 +30,7 @@ static struct mconsole_command commands[] = {
+ 	{ "stop", mconsole_stop, MCONSOLE_PROC },
+ 	{ "go", mconsole_go, MCONSOLE_INTR },
+ 	{ "log", mconsole_log, MCONSOLE_INTR },
++	{ "exec", mconsole_exec, MCONSOLE_PROC },
+ 	{ "proc", mconsole_proc, MCONSOLE_PROC },
+ 	{ "stack", mconsole_stack, MCONSOLE_INTR },
+ };
+diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
+index c17bd6f..1c55fa8 100644
+--- a/arch/um/os-Linux/file.c
++++ b/arch/um/os-Linux/file.c
+@@ -519,6 +519,8 @@ int os_create_unix_socket(const char *file, int len, int close_on_exec)
+ 
+ 	addr.sun_family = AF_UNIX;
+ 
++	if (len > sizeof(addr.sun_path))
++		len = sizeof(addr.sun_path);
+ 	snprintf(addr.sun_path, len, "%s", file);
+ 
+ 	err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+diff --git a/include/linux/kmod.h b/include/linux/kmod.h
+index 0555cc6..476084d 100644
+--- a/include/linux/kmod.h
++++ b/include/linux/kmod.h
+@@ -62,6 +62,7 @@ struct subprocess_info {
+ 	int wait;
+ 	int retval;
+ 	int (*init)(struct subprocess_info *info, struct cred *new);
++	struct file *stdout;
+ 	void (*cleanup)(struct subprocess_info *info);
+ 	void *data;
+ };
+@@ -104,4 +105,6 @@ extern int usermodehelper_read_trylock(void);
+ extern long usermodehelper_read_lock_wait(long timeout);
+ extern void usermodehelper_read_unlock(void);
+ 
++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info, struct file **filp);
++
+ #endif /* __LINUX_KMOD_H__ */
+diff --git a/kernel/kmod.c b/kernel/kmod.c
+index 8241906..2d7f718 100644
+--- a/kernel/kmod.c
++++ b/kernel/kmod.c
+@@ -39,6 +39,7 @@
+ #include <linux/rwsem.h>
+ #include <linux/ptrace.h>
+ #include <linux/async.h>
++#include <linux/pipe_fs_i.h>
+ #include <asm/uaccess.h>
+ 
+ #include <trace/events/module.h>
+@@ -206,6 +207,28 @@ static int ____call_usermodehelper(void *data)
+ 	flush_signal_handlers(current, 1);
+ 	spin_unlock_irq(&current->sighand->siglock);
+ 
++        /* Install output when needed */
++        if (sub_info->stdout) {
++                struct files_struct *f = current->files;
++                struct fdtable *fdt;
++
++                sys_close(1);
++                sys_close(2);
++                get_file(sub_info->stdout);
++                fd_install(1, sub_info->stdout);
++                fd_install(2, sub_info->stdout);
++                spin_lock(&f->file_lock);
++                fdt = files_fdtable(f);
++                __set_bit(1, fdt->open_fds);
++                __clear_bit(1, fdt->close_on_exec);
++                __set_bit(2, fdt->open_fds);
++                __clear_bit(2, fdt->close_on_exec);
++                spin_unlock(&f->file_lock);
++
++                /* disallow core files */
++                current->signal->rlim[RLIMIT_CORE] = (struct rlimit){0, 0};
++        }
++
+ 	/* We can run anywhere, unlike our parent keventd(). */
+ 	set_cpus_allowed_ptr(current, cpu_all_mask);
+ 
+@@ -551,6 +574,20 @@ struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
+ }
+ EXPORT_SYMBOL(call_usermodehelper_setup);
+ 
++int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
++                                 struct file **filp)
++{
++  struct file *f[2];
++
++  if (create_pipe_files(f, 0)<0)
++    return PTR_ERR(f);
++  sub_info->stdout = f[1];
++  *filp = f[0];
++  return 0;
++}
++EXPORT_SYMBOL(call_usermodehelper_stdoutpipe);
++
++
+ /**
+  * call_usermodehelper_exec - start a usermode application
+  * @sub_info: information about the subprocessa

target/linux/uml/patches-3.10/102-pseudo-random-mac.patch

@@ -0,0 +1,129 @@
+===============================================================================
+
+This patch makes MAC addresses of network interfaces predictable. In
+particular, it adds a small routine that computes MAC addresses of based on
+a SHA1 hash of the virtual machine name and interface ID.
+
+TECHNICAL INFORMATION:
+
+Applies to vanilla kernel 3.9.4.
+
+===============================================================================
+diff -aur linux-3.9.4-orig/arch/um/Kconfig.net linux-3.9.4/arch/um/Kconfig.net
+--- linux-3.9.4-orig/arch/um/Kconfig.net	2013-05-24 21:45:59.000000000 +0300
++++ linux-3.9.4/arch/um/Kconfig.net	2013-06-11 13:07:06.363999999 +0300
+@@ -21,6 +21,19 @@
+         enable at least one of the following transport options to actually
+         make use of UML networking.
+ 
++config UML_NET_RANDOM_MAC
++	bool "Use random MAC addresses for network interfaces"
++	default n
++	depends on UML_NET
++	help
++        Virtual network devices inside a User-Mode Linux instance must be
++        assigned a MAC (Ethernet) address. If none is specified on the UML
++        command line, one must be automatically computed. If this option is
++        enabled, a randomly generated address is used. Otherwise, if this
++        option is disabled, the address is generated from a SHA1 hash of
++        the umid of the UML instance and the interface name. The latter choice
++        is useful to make MAC addresses predictable.
++
+ config UML_NET_ETHERTAP
+ 	bool "Ethertap transport"
+ 	depends on UML_NET
+diff -aur linux-3.9.4-orig/arch/um/drivers/net_kern.c linux-3.9.4/arch/um/drivers/net_kern.c
+--- linux-3.9.4-orig/arch/um/drivers/net_kern.c	2013-05-24 21:45:59.000000000 +0300
++++ linux-3.9.4/arch/um/drivers/net_kern.c	2013-06-11 13:09:03.452000001 +0300
+@@ -25,6 +25,13 @@
+ #include <net_kern.h>
+ #include <net_user.h>
+ 
++#include <crypto/sha.h>
++#include <linux/string.h>
++#include <linux/crypto.h>
++#include <linux/err.h>
++#include <linux/scatterlist.h>
++#include "os.h"
++
+ #define DRIVER_NAME "uml-netdev"
+ 
+ static DEFINE_SPINLOCK(opened_lock);
+@@ -295,11 +302,47 @@
+ #endif
+ }
+ 
++#ifndef CONFIG_UML_NET_RANDOM_MAC
++
++/* Compute a SHA1 hash of the UML instance's id and
++ *  * an interface name. */
++static int compute_hash(const char *umid, const char *ifname, char *hash) {
++	char vmif[1024];
++	struct scatterlist sg;
++	struct crypto_hash *tfm;
++	struct hash_desc desc;
++
++	strcpy (vmif, umid);
++	strcat (vmif, ifname);
++
++	tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
++	if (IS_ERR(tfm))
++		return 1;
++
++	desc.tfm = tfm;
++	desc.flags = 0;
++
++	sg_init_table(&sg, 1);
++	sg_set_buf(&sg, vmif, strlen(vmif));
++
++	if (crypto_hash_digest(&desc, &sg, strlen(vmif), hash)) {
++		crypto_free_hash(tfm);
++		return 1;
++	}
++
++	crypto_free_hash(tfm);
++
++	return 0;
++}
++
++#endif
++
+ static void setup_etheraddr(struct net_device *dev, char *str)
+ {
+ 	unsigned char *addr = dev->dev_addr;
+ 	char *end;
+ 	int i;
++	u8 hash[SHA1_DIGEST_SIZE];
+ 
+ 	if (str == NULL)
+ 		goto random;
+@@ -340,9 +383,26 @@
+ 	return;
+ 
+ random:
++#ifdef CONFIG_UML_NET_RANDOM_MAC
+ 	printk(KERN_INFO
+ 	       "Choosing a random ethernet address for device %s\n", dev->name);
+ 	eth_hw_addr_random(dev);
++#else
++	printk(KERN_INFO
++	       "Computing a digest to use as ethernet address for device %s\n", dev->name);
++	if (compute_hash(get_umid(), dev->name, hash)) {
++		printk(KERN_WARNING
++		       "Could not compute digest to use as ethernet address for device %s. "
++		       "Using random address instead.\n", dev->name);
++		random_ether_addr(addr);
++	}
++	else {
++		for (i=0; i < 6; i++)
++			addr[i] = (hash[i] + hash[i+6]) % 0x100;
++	}
++	addr [0] &= 0xfe; /* clear multicast bit */
++	addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
++#endif
+ }
+ 
+ static DEFINE_SPINLOCK(devices_lock);
+Only in linux-3.9.4/arch/um/drivers: net_kern.c.orig
+Only in linux-3.9.4/arch/um/drivers: net_kern.c.rej
+Only in linux-3.9.4/arch/um/drivers: net_kern.c~

target/linux/uml/patches-3.8/002-fix_compilation.patch

@@ -1,24 +0,0 @@
-diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c 
-index b1469fe..9d9f1b4 100644 
---- a/arch/um/os-Linux/signal.c 
-+++ b/arch/um/os-Linux/signal.c 
-@@ -15,7 +15,7 @@ 
- #include <sysdep/mcontext.h>
- #include "internal.h"
- 
--void (*sig_info[NSIG])(int, siginfo_t *, struct uml_pt_regs *) = {
-+void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = {
- 	[SIGTRAP]	= relay_signal,
- 	[SIGFPE]	= relay_signal,
- 	[SIGILL]	= relay_signal,
---- a/arch/um/os-Linux/start_up.c
-+++ b/arch/um/os-Linux/start_up.c
-@@ -15,6 +15,8 @@
- #include <sys/mman.h>
- #include <sys/stat.h>
- #include <sys/wait.h>
-+#include <sys/time.h>
-+#include <sys/resource.h>
- #include <asm/unistd.h>
- #include <init.h>
- #include <os.h>