uml: update to linux 5.4

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/linux/uml/Makefile

@@ -21,16 +21,10 @@ BOARD:=uml
 BOARDNAME:=User Mode Linux
 FEATURES:=squashfs ext4 audio source-only
 
-KERNEL_PATCHVER:=4.14
+KERNEL_PATCHVER:=5.4
 
 include $(INCLUDE_DIR)/target.mk
 
-define Kernel/Patch
-	mkdir -p $(LINUX_DIR)/arch/um/include/uapi
-	mv $(LINUX_DIR)/arch/um/include/asm $(LINUX_DIR)/arch/um/include/uapi/
-	$(Kernel/Patch/Default)
-endef
-
 LINUX_TARGET_CONFIG:=$(CURDIR)/config/$(ARCH)
 
 DEFAULT_PACKAGES += wpad-basic-wolfssl kmod-mac80211-hwsim mkf2fs e2fsprogs

target/linux/uml/config/i386

@@ -1,76 +1,62 @@
 # CONFIG_3_LEVEL_PGTABLES is not set
 # CONFIG_64BIT is not set
 CONFIG_ARCH_DEFCONFIG="arch/um/configs/i386_defconfig"
-# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
 CONFIG_ARCH_HAS_KCOV=y
-CONFIG_ARCH_HAS_SC_SIGNALS=y
+CONFIG_ARCH_NO_PREEMPT=y
-# CONFIG_ARCH_HAS_SG_CHAIN is not set
-# CONFIG_ARCH_HAS_STRICT_KERNEL_RWX is not set
-# CONFIG_ARCH_HAS_STRICT_MODULE_RWX is not set
-# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
-# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
-CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
-CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
 CONFIG_BLK_DEV_COW_COMMON=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_UBD=y
 CONFIG_BLK_DEV_UBD_SYNC=y
-CONFIG_CLONE_BACKWARDS=y
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_CC_HAS_KASAN_GENERIC=y
 CONFIG_CON_CHAN="xterm"
 CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
 CONFIG_CPU_SUP_AMD=y
 CONFIG_CPU_SUP_CENTAUR=y
-CONFIG_CPU_SUP_CYRIX_32=y
+CONFIG_CPU_SUP_HYGON=y
 CONFIG_CPU_SUP_INTEL=y
-CONFIG_CPU_SUP_TRANSMETA_32=y
+CONFIG_CPU_SUP_ZHAOXIN=y
-CONFIG_CPU_SUP_UMC_32=y
-# CONFIG_CRASHLOG is not set
 CONFIG_CRC16=y
 CONFIG_CRYPTO_CRC32=y
 CONFIG_CRYPTO_CRC32C=y
 CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_HASH2=y
 CONFIG_CRYPTO_RNG2=y
-CONFIG_CRYPTO_WORKQUEUE=y
+CONFIG_CRYPTO_SHA1=y
 CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_DECOMPRESS_BZIP2=y
 CONFIG_DECOMPRESS_GZIP=y
-CONFIG_DEFAULT_CFQ=y
-# CONFIG_DEFAULT_DEADLINE is not set
-CONFIG_DEFAULT_IOSCHED="cfq"
 CONFIG_DNOTIFY=y
 # CONFIG_EARLY_PRINTK is not set
-# CONFIG_EMBEDDED is not set
 CONFIG_EXT4_FS=y
-# CONFIG_F2FS_CHECK_FS is not set
 CONFIG_F2FS_FS=y
-# CONFIG_F2FS_FS_SECURITY is not set
 CONFIG_F2FS_FS_XATTR=y
 CONFIG_F2FS_STAT_FS=y
+CONFIG_FAILOVER=y
+CONFIG_FS_IOMAP=y
 CONFIG_FS_MBCACHE=y
+CONFIG_FW_LOADER_PAGED_BUF=y
 CONFIG_GENERIC_CLOCKEVENTS=y
+# CONFIG_GENERIC_CPU is not set
 CONFIG_GENERIC_CPU_DEVICES=y
 CONFIG_GENERIC_FIND_FIRST_BIT=y
-CONFIG_GENERIC_IO=y
 CONFIG_GENERIC_IRQ_SHOW=y
-# CONFIG_GRO_CELLS is not set
-# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
-CONFIG_HAVE_AOUT=y
 CONFIG_HAVE_ARCH_AUDITSYSCALL=y
-# CONFIG_HAVE_ARCH_BITREVERSE is not set
 CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
-# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_ASM_MODVERSIONS=y
+CONFIG_HAVE_COPY_THREAD_TLS=y
+CONFIG_HAVE_DEBUG_BUGVERBOSE=y
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
 CONFIG_HAVE_FUTEX_CMPXCHG=y
-# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
 CONFIG_HAVE_NET_DSA=y
 CONFIG_HAVE_UID16=y
-CONFIG_HOSTAUDIO=m
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
 CONFIG_HOSTFS=y
+CONFIG_HVC_DRIVER=y
+CONFIG_HZ=100
 CONFIG_HZ_PERIODIC=y
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_INIT_ENV_ARG_LIMIT=128
-CONFIG_IOSCHED_CFQ=y
 CONFIG_IRQ_WORK=y
 CONFIG_ISO9660_FS=y
 CONFIG_JBD2=y
@@ -78,68 +64,38 @@ CONFIG_JBD2=y
 CONFIG_KALLSYMS=y
 CONFIG_KERNEL_STACK_ORDER=2
 CONFIG_LD_SCRIPT_STATIC=y
-# CONFIG_M486 is not set
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
-# CONFIG_M586 is not set
-# CONFIG_M586MMX is not set
-# CONFIG_M586TSC is not set
-# CONFIG_M686 is not set
-CONFIG_MAGIC_SYSRQ=y
 # CONFIG_MATOM is not set
 CONFIG_MCONSOLE=y
 # CONFIG_MCORE2 is not set
-# CONFIG_MCRUSOE is not set
+CONFIG_MEMFD_CREATE=y
-# CONFIG_MCYRIXIII is not set
+CONFIG_MIGRATION=y
-# CONFIG_MDIO_BUS is not set
+CONFIG_MK8=y
-# CONFIG_MEFFICEON is not set
-# CONFIG_MELAN is not set
-# CONFIG_MGEODEGX1 is not set
-# CONFIG_MGEODE_LX is not set
-# CONFIG_MK6 is not set
-# CONFIG_MK7 is not set
-# CONFIG_MK8 is not set
 # CONFIG_MMAPPER is not set
-CONFIG_MODULES_USE_ELF_REL=y
+CONFIG_MODULES_USE_ELF_RELA=y
-# CONFIG_MPENTIUM4 is not set
+# CONFIG_MPSC is not set
-CONFIG_MPENTIUMII=y
-# CONFIG_MPENTIUMIII is not set
-# CONFIG_MPENTIUMM is not set
-# CONFIG_MVIAC3_2 is not set
-# CONFIG_MVIAC7 is not set
-# CONFIG_MWINCHIP3D is not set
-# CONFIG_MWINCHIPC6 is not set
 CONFIG_NAMESPACES=y
 CONFIG_NEED_PER_CPU_KM=y
+CONFIG_NET_FAILOVER=y
 # CONFIG_NET_NS is not set
 CONFIG_NLS=y
-# CONFIG_NOCONFIG_CHAN is not set
 CONFIG_NO_DMA=y
 CONFIG_NO_IOMEM=y
 CONFIG_NR_CPUS=1
-# CONFIG_NSC_GPIO is not set
 CONFIG_NULL_CHAN=y
 # CONFIG_OF is not set
-CONFIG_OLD_SIGACTION=y
+CONFIG_PGTABLE_LEVELS=3
-CONFIG_OLD_SIGSUSPEND3=y
+CONFIG_PHYS_ADDR_T_64BIT=y
-CONFIG_PGTABLE_LEVELS=2
 CONFIG_PORT_CHAN=y
 CONFIG_POSIX_MQUEUE=y
 CONFIG_POSIX_MQUEUE_SYSCTL=y
 # CONFIG_PROCESSOR_SELECT is not set
 CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_PTY_CHAN=y
-# CONFIG_RCU_NEED_SEGCBLIST is not set
-# CONFIG_RCU_STALL_COMMON is not set
 CONFIG_RD_BZIP2=y
 CONFIG_RD_GZIP=y
 CONFIG_RELAY=y
-# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
-# CONFIG_SBC8360_WDT is not set
-# CONFIG_SCHED_INFO is not set
-# CONFIG_SCSI_DMA is not set
 CONFIG_SOFT_WATCHDOG=m
-CONFIG_SOUND=m
-CONFIG_SOUND_OSS_CORE=y
-CONFIG_SOUND_OSS_CORE_PRECLAIM=y
 CONFIG_SRCU=y
 CONFIG_SSL=y
 CONFIG_SSL_CHAN="pty"
@@ -152,19 +108,26 @@ CONFIG_TTY_CHAN=y
 CONFIG_UML=y
 CONFIG_UML_NET=y
 CONFIG_UML_NET_DAEMON=y
+CONFIG_UML_NET_DETERMINISTIC_MAC=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
 # CONFIG_UML_NET_VDE is not set
+CONFIG_UML_NET_VECTOR=y
 CONFIG_UML_RANDOM=y
-CONFIG_UML_SOUND=m
+# CONFIG_UML_SOUND is not set
-CONFIG_UML_WATCHDOG=m
+CONFIG_UML_TIME_TRAVEL_SUPPORT=y
+CONFIG_UML_WATCHDOG=y
 CONFIG_UML_X86=y
 # CONFIG_USER_NS is not set
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_UML=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_WATCHDOG_CORE=y
 CONFIG_X86_32=y

target/linux/uml/config/x86_64

@@ -1,75 +1,64 @@
 CONFIG_3_LEVEL_PGTABLES=y
 CONFIG_64BIT=y
 CONFIG_ARCH_DEFCONFIG="arch/um/configs/x86_64_defconfig"
-# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
+CONFIG_ARCH_DMA_ADDR_T_64BIT=y
 CONFIG_ARCH_HAS_KCOV=y
-# CONFIG_ARCH_HAS_SC_SIGNALS is not set
+CONFIG_ARCH_NO_PREEMPT=y
-# CONFIG_ARCH_HAS_SG_CHAIN is not set
-# CONFIG_ARCH_HAS_STRICT_KERNEL_RWX is not set
-# CONFIG_ARCH_HAS_STRICT_MODULE_RWX is not set
-# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
-# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
-# CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA is not set
 CONFIG_BLK_DEV_COW_COMMON=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_UBD=y
 CONFIG_BLK_DEV_UBD_SYNC=y
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_CC_HAS_KASAN_GENERIC=y
 CONFIG_CON_CHAN="xterm"
 CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
 CONFIG_CPU_SUP_AMD=y
 CONFIG_CPU_SUP_CENTAUR=y
+CONFIG_CPU_SUP_HYGON=y
 CONFIG_CPU_SUP_INTEL=y
-# CONFIG_CRASHLOG is not set
+CONFIG_CPU_SUP_ZHAOXIN=y
 CONFIG_CRC16=y
-# CONFIG_CRYPTO_AES_X86_64 is not set
 CONFIG_CRYPTO_CRC32=y
 CONFIG_CRYPTO_CRC32C=y
 CONFIG_CRYPTO_HASH=y
 CONFIG_CRYPTO_HASH2=y
 CONFIG_CRYPTO_RNG2=y
 CONFIG_CRYPTO_SHA1=y
-# CONFIG_CRYPTO_SKEIN is not set
 # CONFIG_CRYPTO_TWOFISH_X86_64 is not set
-CONFIG_CRYPTO_WORKQUEUE=y
 CONFIG_DEBUG_MEMORY_INIT=y
 CONFIG_DECOMPRESS_BZIP2=y
 CONFIG_DECOMPRESS_GZIP=y
-CONFIG_DEFAULT_CFQ=y
-# CONFIG_DEFAULT_DEADLINE is not set
-CONFIG_DEFAULT_IOSCHED="cfq"
 CONFIG_DNOTIFY=y
 # CONFIG_EARLY_PRINTK is not set
 CONFIG_EXT4_FS=y
-# CONFIG_F2FS_CHECK_FS is not set
 CONFIG_F2FS_FS=y
-# CONFIG_F2FS_FS_SECURITY is not set
 CONFIG_F2FS_FS_XATTR=y
 CONFIG_F2FS_STAT_FS=y
+CONFIG_FAILOVER=y
+CONFIG_FS_IOMAP=y
 CONFIG_FS_MBCACHE=y
+CONFIG_FW_LOADER_PAGED_BUF=y
 CONFIG_GENERIC_CLOCKEVENTS=y
 # CONFIG_GENERIC_CPU is not set
 CONFIG_GENERIC_CPU_DEVICES=y
 CONFIG_GENERIC_FIND_FIRST_BIT=y
-CONFIG_GENERIC_IO=y
 CONFIG_GENERIC_IRQ_SHOW=y
-# CONFIG_GRO_CELLS is not set
-CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
 CONFIG_HAVE_ARCH_AUDITSYSCALL=y
-# CONFIG_HAVE_ARCH_BITREVERSE is not set
 CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
-# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_HAVE_ASM_MODVERSIONS=y
+CONFIG_HAVE_COPY_THREAD_TLS=y
+CONFIG_HAVE_DEBUG_BUGVERBOSE=y
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
 CONFIG_HAVE_FUTEX_CMPXCHG=y
-# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
 CONFIG_HAVE_NET_DSA=y
 CONFIG_HAVE_UID16=y
 CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
-CONFIG_HOSTAUDIO=m
 CONFIG_HOSTFS=y
+CONFIG_HVC_DRIVER=y
+CONFIG_HZ=100
 CONFIG_HZ_PERIODIC=y
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_INIT_ENV_ARG_LIMIT=128
-CONFIG_IOSCHED_CFQ=y
 CONFIG_IRQ_WORK=y
 CONFIG_ISO9660_FS=y
 CONFIG_JBD2=y
@@ -77,19 +66,21 @@ CONFIG_JBD2=y
 CONFIG_KALLSYMS=y
 CONFIG_KERNEL_STACK_ORDER=2
 CONFIG_LD_SCRIPT_STATIC=y
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
 # CONFIG_MATOM is not set
 CONFIG_MCONSOLE=y
 # CONFIG_MCORE2 is not set
-# CONFIG_MDIO_BUS is not set
+CONFIG_MEMFD_CREATE=y
+CONFIG_MIGRATION=y
 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
+CONFIG_NET_FAILOVER=y
 # CONFIG_NET_NS is not set
 CONFIG_NLS=y
-# CONFIG_NOCONFIG_CHAN is not set
 CONFIG_NO_DMA=y
 CONFIG_NO_IOMEM=y
 CONFIG_NR_CPUS=1
@@ -103,19 +94,10 @@ CONFIG_POSIX_MQUEUE_SYSCTL=y
 # CONFIG_PROCESSOR_SELECT is not set
 CONFIG_PROC_PAGE_MONITOR=y
 CONFIG_PTY_CHAN=y
-# CONFIG_RCU_NEED_SEGCBLIST is not set
-# 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_SCHED_INFO is not set
-# CONFIG_SCSI_DMA is not set
 CONFIG_SOFT_WATCHDOG=m
-CONFIG_SOUND=m
-CONFIG_SOUND_OSS_CORE=y
-CONFIG_SOUND_OSS_CORE_PRECLAIM=y
 CONFIG_SRCU=y
 CONFIG_SSL=y
 CONFIG_SSL_CHAN="pty"
@@ -128,22 +110,28 @@ CONFIG_TTY_CHAN=y
 CONFIG_UML=y
 CONFIG_UML_NET=y
 CONFIG_UML_NET_DAEMON=y
+CONFIG_UML_NET_DETERMINISTIC_MAC=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
 # CONFIG_UML_NET_VDE is not set
+CONFIG_UML_NET_VECTOR=y
 CONFIG_UML_RANDOM=y
-CONFIG_UML_SOUND=m
+# CONFIG_UML_SOUND is not set
-CONFIG_UML_WATCHDOG=m
+CONFIG_UML_TIME_TRAVEL_SUPPORT=y
+CONFIG_UML_WATCHDOG=y
 CONFIG_UML_X86=y
 # CONFIG_USER_NS is not set
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_UML=y
 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_CMPXCHG64=y

target/linux/uml/patches-5.4/101-mconsole-exec.patch

@@ -28,7 +28,7 @@
 --- a/arch/um/drivers/mconsole_kern.c
 +++ b/arch/um/drivers/mconsole_kern.c
 @@ -4,6 +4,7 @@
-  * Licensed under the GPL
+  * Copyright (C) 2001 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   */
  
 +#include <linux/kmod.h>
@@ -43,7 +43,7 @@
  #include <asm/switch_to.h>
  
  #include <init.h>
-@@ -122,6 +124,59 @@ void mconsole_log(struct mc_request *req
+@@ -121,6 +123,59 @@ void mconsole_log(struct mc_request *req
  	mconsole_reply(req, "", 0, 0);
  }
  
@@ -123,7 +123,7 @@
  };
 --- a/arch/um/os-Linux/file.c
 +++ b/arch/um/os-Linux/file.c
-@@ -555,6 +555,8 @@ int os_create_unix_socket(const char *fi
+@@ -557,6 +557,8 @@ int os_create_unix_socket(const char *fi
  
  	addr.sun_family = AF_UNIX;
  
@@ -134,7 +134,7 @@
  	err = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 --- a/include/linux/kmod.h
 +++ b/include/linux/kmod.h
-@@ -45,4 +45,6 @@ static inline int request_module_nowait(
+@@ -32,4 +32,6 @@ static inline int request_module_nowait(
  #define try_then_request_module(x, mod...) (x)
  #endif
  
@@ -143,25 +143,17 @@
  #endif /* __LINUX_KMOD_H__ */
 --- a/include/linux/umh.h
 +++ b/include/linux/umh.h
-@@ -22,6 +22,7 @@ struct subprocess_info {
+@@ -23,6 +23,7 @@ struct subprocess_info {
- 	const char *path;
  	char **argv;
  	char **envp;
+ 	struct file *file;
 +	struct file *stdout;
  	int wait;
  	int retval;
- 	int (*init)(struct subprocess_info *info, struct cred *new);
+ 	pid_t pid;
 --- a/kernel/umh.c
 +++ b/kernel/umh.c
-@@ -25,6 +25,7 @@
+@@ -75,6 +75,28 @@ static int call_usermodehelper_exec_asyn
- #include <linux/ptrace.h>
- #include <linux/async.h>
- #include <linux/uaccess.h>
-+#include <linux/pipe_fs_i.h>
- 
- #include <trace/events/module.h>
- 
-@@ -70,6 +71,28 @@ static int call_usermodehelper_exec_asyn
  	flush_signal_handlers(current, 1);
  	spin_unlock_irq(&current->sighand->siglock);
  
@@ -190,9 +182,9 @@
  	/*
  	 * Our parent (unbound workqueue) runs with elevated scheduling
  	 * priority. Avoid propagating that into the userspace child.
-@@ -393,6 +416,20 @@ struct subprocess_info *call_usermodehel
+@@ -353,6 +375,20 @@ static void helper_unlock(void)
+ 		wake_up(&running_helpers_waitq);
  }
- EXPORT_SYMBOL(call_usermodehelper_setup);
  
 +int call_usermodehelper_stdoutpipe(struct subprocess_info *sub_info,
 +				   struct file **filp)
@@ -209,5 +201,5 @@
 +EXPORT_SYMBOL(call_usermodehelper_stdoutpipe);
 +
  /**
-  * call_usermodehelper_exec - start a usermode application
+  * call_usermodehelper_setup - prepare to call a usermode helper
-  * @sub_info: information about the subprocessa
+  * @path: path to usermode executable

target/linux/uml/patches-5.4/102-pseudo-random-mac.patch

@@ -9,16 +9,17 @@ TECHNICAL INFORMATION:
 Applies to vanilla kernel 3.9.4.
 
 ===============================================================================
---- a/arch/um/Kconfig.net
+--- a/arch/um/drivers/Kconfig
-+++ b/arch/um/Kconfig.net
++++ b/arch/um/drivers/Kconfig
-@@ -22,6 +22,19 @@ config UML_NET
+@@ -146,6 +146,20 @@ config UML_NET
-         enable at least one of the following transport options to actually
+ 	  enable at least one of the following transport options to actually
-         make use of UML networking.
+ 	  make use of UML networking.
  
-+config UML_NET_RANDOM_MAC
++config UML_NET_DETERMINISTIC_MAC
-+	bool "Use random MAC addresses for network interfaces"
++	bool "Use deterministic MAC addresses for network interfaces"
-+	default n
++	default y
 +	depends on UML_NET
++	select CRYPTO_SHA1
 +	help
 +        Virtual network devices inside a User-Mode Linux instance must be
 +        assigned a MAC (Ethernet) address. If none is specified on the UML
@@ -48,11 +49,11 @@ Applies to vanilla kernel 3.9.4.
  #define DRIVER_NAME "uml-netdev"
  
  static DEFINE_SPINLOCK(opened_lock);
-@@ -288,11 +296,53 @@ static void uml_net_user_timer_expire(un
+@@ -286,9 +294,51 @@ static void uml_net_user_timer_expire(st
  #endif
  }
  
-+#ifndef CONFIG_UML_NET_RANDOM_MAC
++#ifdef CONFIG_UML_NET_DETERMINISTIC_MAC
 +
 +/* Compute a SHA1 hash of the UML instance's id and
 + *  * an interface name. */
@@ -93,20 +94,18 @@ Applies to vanilla kernel 3.9.4.
 +
 +#endif
 +
- static void setup_etheraddr(struct net_device *dev, char *str)
+ void uml_net_setup_etheraddr(struct net_device *dev, char *str)
  {
  	unsigned char *addr = dev->dev_addr;
++	u8 hash[SHA1_DIGEST_SIZE];
  	char *end;
  	int i;
-+	u8 hash[SHA1_DIGEST_SIZE];
  
- 	if (str == NULL)
+@@ -331,9 +381,26 @@ void uml_net_setup_etheraddr(struct net_
- 		goto random;
-@@ -333,9 +383,26 @@ static void setup_etheraddr(struct net_d
  	return;
  
  random:
-+#ifdef CONFIG_UML_NET_RANDOM_MAC
++#ifndef CONFIG_UML_NET_DETERMINISTIC_MAC
  	printk(KERN_INFO
  	       "Choosing a random ethernet address for device %s\n", dev->name);
  	eth_hw_addr_random(dev);