[BISECTED] Regression v4.6-rc1 : nanosleep doesn't return on AT91SAM9

Tue May 10 06:58:42 PDT 2016

Hi,

Starting with 4.6-rc1, a sleep 1 doesn't return :

execve("/bin/sleep", ["sleep", "1"], ["USER=root", "SHLVL=1",
"OLDPWD=/var", "HOME=/", "TERM=vt102",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin", "SHELL=/bin/sh", "PWD=/"]) = 0
uname({sysname="Linux", nodename="LNS",
release="4.5.0-09406-g46e595a17dcf", version="#72 Tue May 10 15:41:34
CEST 2016", machine="armv5tejl", domainname="(none)"}) = 0
brk(0)                                  = 0x153000
brk(0x153d20)                           = 0x153d20
set_tls(0x1534c0, 0x14d1e4, 0, 0x153d20, 0x14e368) = 0
readlink("/proc/self/exe", "/bin/busybox", 4096) = 12
brk(0x174d20)                           = 0x174d20
brk(0x175000)                           = 0x175000
getuid32()                              = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
nanosleep({1, 0},

And the heartbeat led doesn't blink anymore (full on), as if the
timers never fire.

The platform is an AT91SAM9G35-CM.

git bisect gives a merge as the 1st bad commit :(
first bad commit: [46e595a17dcf11404f713845ecb5b06b92a94e43] Merge tag
'armsoc-drivers' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Here is the git bisect log:
git bisect start
# good: [b562e44f507e863c6792946e4e1b1449fbbac85d] Linux 4.5
git bisect good b562e44f507e863c6792946e4e1b1449fbbac85d
# bad: [f55532a0c0b8bb6148f4e07853b876ef73bc69ca] Linux 4.6-rc1
git bisect bad f55532a0c0b8bb6148f4e07853b876ef73bc69ca
# good: [6b5f04b6cf8ebab9a65d9c0026c650bb2538fd0f] Merge branch
'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
git bisect good 6b5f04b6cf8ebab9a65d9c0026c650bb2538fd0f
# bad: [53d2e6976bd4042672ed7b90dfbf4b31635b7dcf] Merge tag
'xfs-for-linus-4.6-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
git bisect bad 53d2e6976bd4042672ed7b90dfbf4b31635b7dcf
# good: [8626c56c8279b88b91b8df55345cdf89542d5e90] bridge: fix
potential use-after-free when hook returns QUEUE or STOLEN verdict
git bisect good 8626c56c8279b88b91b8df55345cdf89542d5e90
# good: [8c6d4082fc6ad2214e945b5b7368b828fb16e9a9] Merge tag
'armsoc-arm64' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 8c6d4082fc6ad2214e945b5b7368b828fb16e9a9
# good: [915c56bc01d6eab071e0dd1c6ea3bf73fbe5124f] Merge tag
'armsoc-dt64' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 915c56bc01d6eab071e0dd1c6ea3bf73fbe5124f
# bad: [24b5e20f11a75866bbffc46c30a22fa50612a769] Merge branch
'efi-core-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect bad 24b5e20f11a75866bbffc46c30a22fa50612a769
# bad: [46e595a17dcf11404f713845ecb5b06b92a94e43] Merge tag
'armsoc-drivers' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect bad 46e595a17dcf11404f713845ecb5b06b92a94e43
# good: [4a6f791c359a78535553ccf060615622d27b1ce1] Merge tag
'omap-for-v4.6/defconfig-signed' of
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into
next/defconfig
git bisect good 4a6f791c359a78535553ccf060615622d27b1ce1
# good: [f628c64fc0ffdcd08f39d74ec23ed7706cb8653b] Merge tag
'at91-ab-4.6-drivers' of
git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into
next/drivers
git bisect good f628c64fc0ffdcd08f39d74ec23ed7706cb8653b
# good: [387eb3f3d574ebf43b3afe83da59a99481866b78] reset: socfpga:
Make reset_control_ops const
git bisect good 387eb3f3d574ebf43b3afe83da59a99481866b78
# good: [87023bc2ed11ea6b0944b34cc0281454c01832bf] Merge tag
'sunxi-drivers-for-4.6' of
https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into
next/drivers
git bisect good 87023bc2ed11ea6b0944b34cc0281454c01832bf
# good: [33b96d2c9579213cf3f36d7b29841b1e464750c4] bus: imx-weim: Take
the 'status' property value into account
git bisect good 33b96d2c9579213cf3f36d7b29841b1e464750c4
# good: [9fe5bf92c30a89631eb1fafe0d9b18e2ba331ebb] ARM: configs: Add
new config fragment to change RAM start point
git bisect good 9fe5bf92c30a89631eb1fafe0d9b18e2ba331ebb
# good: [e3b1f64e04f57198ca0ab1216d824a5547be8446] Merge tag
'armsoc-defconfig' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good e3b1f64e04f57198ca0ab1216d824a5547be8446
# first bad commit: [46e595a17dcf11404f713845ecb5b06b92a94e43] Merge
tag 'armsoc-drivers' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

And the defconfig :
CONFIG_KERNEL_LZO=y
CONFIG_DEFAULT_HOSTNAME="lns"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
CONFIG_FHANDLE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_RELAY=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_SLAB=y
CONFIG_PARTITION_ADVANCED=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
# CONFIG_ARCH_MULTI_V7 is not set
CONFIG_ARCH_AT91=y
CONFIG_SOC_AT91SAM9=y
CONFIG_AEABI=y
# CONFIG_COMPACTION is not set
CONFIG_UACCESS_WITH_MEMCPY=y
# CONFIG_ATAGS is not set
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
# CONFIG_COREDUMP is not set
# CONFIG_SUSPEND is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
CONFIG_XFRM_USER=y
CONFIG_NET_KEY=y
CONFIG_INET=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_INET_AH=y
CONFIG_INET_ESP=y
CONFIG_INET_IPCOMP=y
CONFIG_INET_UDP_DIAG=y
CONFIG_INET6_AH=y
CONFIG_INET6_ESP=y
CONFIG_INET6_IPCOMP=y
CONFIG_NETFILTER=y
# CONFIG_BRIDGE_NETFILTER is not set
CONFIG_NETFILTER_NETLINK_LOG=y
CONFIG_NF_CONNTRACK=y
# CONFIG_NF_CONNTRACK_PROCFS is not set
CONFIG_NF_CT_NETLINK=y
CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
CONFIG_NETFILTER_XT_TARGET_MARK=y
CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_NF_NAT_IPV4=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_MANGLE=y
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_IPTABLES=y
CONFIG_IP6_NF_MATCH_IPV6HEADER=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
CONFIG_BRIDGE=y
# CONFIG_BRIDGE_IGMP_SNOOPING is not set
CONFIG_DNS_RESOLVER=y
CONFIG_NETLINK_DIAG=y
CONFIG_CFG80211=y
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=y
CONFIG_MAC80211_LEDS=y
CONFIG_RFKILL=y
CONFIG_RFKILL_INPUT=y
CONFIG_RFKILL_GPIO=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_ATMEL=y
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_FASTMAP=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=4
CONFIG_BLK_DEV_RAM_SIZE=8192
CONFIG_ATMEL_TCLIB=y
CONFIG_ATMEL_SSC=y
CONFIG_EEPROM_AT24=y
CONFIG_EEPROM_93CX6=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_NETDEVICES=y
# CONFIG_NET_VENDOR_ARC is not set
# CONFIG_NET_CADENCE is not set
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_VENDOR_CIRRUS is not set
# CONFIG_NET_VENDOR_EZCHIP is not set
# CONFIG_NET_VENDOR_FARADAY is not set
# CONFIG_NET_VENDOR_HISILICON is not set
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_MICROCHIP is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_NET_VENDOR_NETRONOME is not set
# CONFIG_NET_VENDOR_QUALCOMM is not set
# CONFIG_NET_VENDOR_RENESAS is not set
# CONFIG_NET_VENDOR_ROCKER is not set
# CONFIG_NET_VENDOR_SAMSUNG is not set
# CONFIG_NET_VENDOR_SEEQ is not set
# CONFIG_NET_VENDOR_SMSC is not set
# CONFIG_NET_VENDOR_STMICRO is not set
# CONFIG_NET_VENDOR_SYNOPSYS is not set
# CONFIG_NET_VENDOR_VIA is not set
# CONFIG_NET_VENDOR_WIZNET is not set
CONFIG_PHYLIB=y
CONFIG_DAVICOM_PHY=y
CONFIG_PPP=y
CONFIG_PPP_DEFLATE=y
CONFIG_PPP_ASYNC=y
# CONFIG_USB_NET_DRIVERS is not set
# CONFIG_WLAN is not set
# CONFIG_INPUT_MOUSEDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_UINPUT=y
# CONFIG_SERIO is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_ATMEL=y
CONFIG_SERIAL_ATMEL_CONSOLE=y
# CONFIG_SERIAL_ATMEL_PDC is not set
CONFIG_I2C=y
# CONFIG_I2C_COMPAT is not set
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_MUX=y
CONFIG_I2C_AT91=y
CONFIG_I2C_GPIO=y
CONFIG_SPI=y
CONFIG_SPI_ATMEL=y
CONFIG_SPI_SPIDEV=y
CONFIG_GPIO_SYSFS=y
# CONFIG_HWMON is not set
CONFIG_WATCHDOG=y
CONFIG_AT91SAM9X_WATCHDOG=y
CONFIG_SSB=y
CONFIG_BCMA=y
CONFIG_SOUND=y
CONFIG_SND=y
# CONFIG_SND_SUPPORT_OLD_API is not set
# CONFIG_SND_VERBOSE_PROCFS is not set
# CONFIG_SND_DRIVERS is not set
# CONFIG_SND_ARM is not set
# CONFIG_SND_SPI is not set
# CONFIG_SND_USB is not set
CONFIG_SND_SOC=y
CONFIG_SND_ATMEL_SOC=y
CONFIG_SND_AT91_SOC_SAM9X5_WM8731=y
CONFIG_HIDRAW=y
CONFIG_UHID=y
CONFIG_USB_HIDDEV=y
CONFIG_USB=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_ACM=y
CONFIG_USB_WDM=y
CONFIG_USB_STORAGE=y
CONFIG_USB_STORAGE_REALTEK=y
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
CONFIG_USB_STORAGE_USBAT=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_STORAGE_ALAUDA=y
CONFIG_USB_STORAGE_ONETOUCH=y
CONFIG_USB_STORAGE_KARMA=y
CONFIG_USB_STORAGE_CYPRESS_ATACB=y
CONFIG_USB_STORAGE_ENE_UB6250=y
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_IPW=y
CONFIG_USB_SERIAL_PL2303=y
CONFIG_USB_SERIAL_QUALCOMM=y
CONFIG_USB_SERIAL_SIERRAWIRELESS=y
CONFIG_USB_SERIAL_OPTION=y
CONFIG_USB_EZUSB_FX2=y
CONFIG_USB_GADGET=y
CONFIG_USB_AT91=y
CONFIG_USB_ATMEL_USBA=y
CONFIG_USB_ETH=y
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
CONFIG_LEDS_GPIO=y
CONFIG_LEDS_TRIGGER_TIMER=y
CONFIG_LEDS_TRIGGER_ONESHOT=y
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
CONFIG_LEDS_TRIGGER_GPIO=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
CONFIG_DMADEVICES=y
CONFIG_AT_HDMAC=y
# CONFIG_IOMMU_SUPPORT is not set
CONFIG_FANOTIFY=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=850
CONFIG_NTFS_FS=y
CONFIG_TMPFS=y
CONFIG_UBIFS_FS=y
CONFIG_UBIFS_FS_ADVANCED_COMPR=y
# CONFIG_NETWORK_FILESYSTEMS is not set
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_850=y
CONFIG_NLS_ISO8859_1=y
CONFIG_NLS_UTF8=y
CONFIG_PRINTK_TIME=y
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_LOCKUP_DETECTOR=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
CONFIG_BOOTPARAM_HUNG_TASK_PANIC=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
CONFIG_FUNCTION_TRACER=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_KEYS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_MICHAEL_MIC=y
CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_CRYPTO_USER_API_SKCIPHER=y
# CONFIG_CRYPTO_HW is not set
CONFIG_CRC_ITU_T=y
CONFIG_CRC7=y

Regards,
Richard.