linux-next: Tree for Jan 7

linux-next: Tree for Jan 7

[Stephen Rothwell]

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Hi all,

Changes since 20150106:

*crickets*

Non-merge commits (relative to Linus' tree): 1350
 1543 files changed, 41856 insertions(+), 24250 deletions(-)

----------------------------------------------------------------------------

I have created today's linux-next tree at
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
(patches at http://www.kernel.org/pub/linux/kernel/next/ ).  If you
are tracking the linux-next tree using git, you should not use "git pull"
to do so as that will try to merge the new linux-next release with the
old one.  You should use "git fetch" and checkout or reset to the new
master.

You can see which trees have been included by looking in the Next/Trees
file in the source.  There are also quilt-import.log and merge.log files
in the Next directory.  Between each merge, the tree was built with
a ppc64_defconfig for powerpc and an allmodconfig for x86_64 and a
multi_v7_defconfig for arm. After the final fixups (if any), it is also
built with powerpc allnoconfig (32 and 64 bit), ppc44x_defconfig and
allyesconfig (this fails its final link) and i386, sparc, sparc64 and arm
defconfig.

Below is a summary of the state of the merge.

I am currently merging 234 trees (counting Linus' and 32 trees of patches
pending for Linus' tree).

Stats about the size of the tree over time can be seen at
http://neuling.org/linux-next-size.html .

Status of my local build tests will be at
http://kisskb.ellerman.id.au/linux-next .  If maintainers want to give
advice about cross compilers/configs that work, we are always open to add
more builds.

Thanks to Randy Dunlap for doing many randconfig builds.  And to Paul
Gortmaker for triage and bug fixes.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

$ git checkout master
$ git reset --hard stable
Merging origin/master (b1940cd21c0f Linux 3.19-rc3)
Merging fixes/master (b94d525e58dc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net)
Merging kbuild-current/rc-fixes (a16c5f99a28c kbuild: Fix removal of the debian/ directory)
Merging arc-current/for-curr (2ce7598c9a45 Linux 3.17-rc4)
Merging arm-current/fixes (3f4aa45ceea5 ARM: 8226/1: cacheflush: get rid of restarting block)
Merging m68k-current/for-linus (f0b99a643e96 m68k/mm: Eliminate memset after alloc_bootmem_pages)
Merging metag-fixes/fixes (ffe6902b66aa asm-generic: remove _STK_LIM_MAX)
Merging mips-fixes/mips-fixes (1795cd9b3a91 Linux 3.16-rc5)
Merging powerpc-merge/merge (31345e1a071e powerpc/pci: Remove unused force_32bit_msi quirk)
Merging powerpc-merge-mpe/fixes (1be6f10f6f9c Revert "powerpc: Secondary CPUs must set cpu_callin_map after setting active and online")
Merging sparc/master (66d0f7ec9f10 sparc32: destroy_context() and switch_mm() needs to disable interrupts.)
Merging net/master (2abad79afa70 qla3xxx: don't allow never end busy loop)
Merging ipsec/master (f855691975bb xfrm6: Fix the nexthdr offset in _decode_session6.)
Merging sound-current/for-linus (c507de88f6a3 ALSA: hda - Fix wrong gpio_dir & gpio_mask hint setups for IDT/STAC codecs)
Merging pci-current/for-linus (97bf6af1f928 Linux 3.19-rc1)
Merging wireless-drivers/master (c702674f99e6 Merge tag 'iwlwifi-for-kalle-2015-01-05' of https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes)
Merging driver-core.current/driver-core-linus (b7392d2247cf Linux 3.19-rc2)
Merging tty.current/tty-linus (68ed7e1c3d23 serial: fix parisc boot hang)
Merging usb.current/usb-linus (b3ee8bdcd243 Merge tag 'fixes-for-v3.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus)
Merging usb-gadget-fixes/fixes (6785a1034461 usb: gadget: udc: atmel: fix possible IN hang issue)
Merging usb-serial-fixes/usb-linus (1ae78a487098 USB: cp210x: add IDs for CEL USB sticks and MeshWorks devices)
Merging staging.current/staging-linus (b7392d2247cf Linux 3.19-rc2)
Merging char-misc.current/char-misc-linus (b7392d2247cf Linux 3.19-rc2)
Merging input-current/for-linus (cceeb872d60f Input: hil_kbd - fix incorrect use of init_completion)
Merging md-current/for-linus (d47648fcf061 raid5: avoid finding "discard" stripe)
Merging crypto-current/master (0b8c960cf6de crypto: sha-mb - Add avx2_supported check.)
Merging ide/master (f96fe225677b Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net)
Merging dwmw2/master (5950f0803ca9 pcmcia: remove RPX board stuff)
Merging devicetree-current/devicetree/merge (094cb98179f1 of/fdt: memblock_reserve /memreserve/ regions in the case of partial overlap)
Merging rr-fixes/fixes (3438cf549d2f param: fix crash on bad kernel arguments)
Merging vfio-fixes/for-linus (239a87020b26 Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into for-linus)
Merging kselftest-fixes/fixes (13e634de0955 tools: testing: selftests: mq_perf_tests: Fix infinite loop on ARM)
Merging drm-intel-fixes/for-linux-next-fixes (26acf418e613 drm/i915: Ban Haswell from using RCS flips)
Merging asm-generic/master (cb61f6769b88 ARM64: use GENERIC_PCI_IOMAP)
Merging arc/for-next (5840adceb962 arc: Remove unused prepare_to_copy())
Merging arm/for-next (e9f2d6d66037 Merge branch 'devel-stable' into for-next)
Merging arm-perf/for-next/perf (cac7f2429872 Linux 3.18-rc2)
Merging arm-soc/for-next (d6ad36913083 clocksource: arch_timer: Only use the virtual counter (CNTVCT) on arm64)
Merging bcm2835/for-next (b2776bf7149b Linux 3.18)
Merging berlin/berlin/for-next (97bf6af1f928 Linux 3.19-rc1)
Merging cortex-m/for-next (e799b6f37e6c ARM: zImage: add support for ARMv7-M)
Merging ep93xx/ep93xx-for-next (bfb0709fd17b Merge branch 'ep93xx-fixes' into ep93xx-for-next)
Merging imx-mxs/for-next (bc8127e027df Merge branch 'imx/defconfig' into for-next)
Merging ixp4xx/next (19f949f52599 Linux 3.8)
Merging keystone/next (b17275a4a6cc Merge branch 'for_3.19/soc' into next)
Merging msm/for-next (81cf1e061d00 ARM: msm: Rename msm devicetrees to have standard 'qcom' prefix)
Merging mvebu/for-next (f50900ef7cf2 Merge branch 'mvebu/dt' into mvebu/for-next)
Merging renesas/next (340337ad530d Merge branches 'heads/soc-fixes-for-v3.19', 'heads/defconfig-for-v3.20', 'heads/soc-for-v3.20', 'heads/dt-for-v3.20', 'heads/dt-cleanups-for-v3.20', 'heads/sh-drivers-for-v3.20', 'heads/lager-board-removal-for-v3.20' and 'heads/sh73a0-ccf-for-v3.20' into next)
Merging samsung/for-next (1eeec807bf64 Merge branch 'v3.20-next/dt-samsung-64' into for-next)
Merging sunxi/sunxi/for-next (da98676a0263 Merge branches 'sunxi/dt-for-3.20', 'sunxi/core-for-3.20' and 'sunxi/clocks-for-3.20' into sunxi/for-next)
Merging tegra/for-next (71f10387ef9d Merge branch for-3.20/dt into for-next)
Merging arm64/for-next/core (fb59d007a0e4 arm64: mm: dump: don't skip final region)
Merging blackfin/for-linus (275f5a8573e7 blackfin: defconfigs: cleanup unused CONFIG_MTD_CHAR, add MTD_SPI_NOR for BF537-STAMP)
Merging c6x/for-linux-next (ae72758f1dd9 c6x: fix build failure caused by cache.h)
Merging cris/for-next (21bd887cd7c4 CRISv32: Remove last remnants of ETRAX_SPI_MMC_BOARD)
Merging hexagon/linux-next (8914d7e85780 Hexagon: fix signal delivery for debug traps)
Merging ia64/next (0fd2468fd035 Merge branch 'misc-3.19' into next)
Merging m68k/for-next (f0b99a643e96 m68k/mm: Eliminate memset after alloc_bootmem_pages)
Merging m68knommu/for-next (9ebaf8bb9107 arch: m68k: 68360: config: Remove unused function)
Merging metag/for-next (f93125ae17d1 metag: cachepart: Fix failure check)
Merging microblaze/next (761624d01afa microblaze: intc: Reformat output)
Merging mips/mips-for-linux-next (a682437a894d Merge branch '3.19-fixes' into mips-for-linux-next)
Merging nios2/nios2-next (1b0f44923e18 nios2: Use preempt_schedule_irq)
Merging openrisc/for-upstream (548dafe880ad openrisc: Use get_signal() signal_setup_done())
Merging parisc/for-next (6c700d71f7fa [PARISC] hpux: Remove obsolete regs parameter from do_execve() in hpux_execve())
Merging parisc-hd/for-next (b2776bf7149b Linux 3.18)
Merging powerpc/next (d557b09800da powerpc/mm/thp: Use tlbiel if possible)
Merging powerpc-mpe/next (9a4fc4eaf111 powerpc/kvm: Create proper names for the kvm_host_state PMU fields)
Merging fsl/next (76f3e2929bb6 powerpc/config: Enable memory driver)
Merging mpc5xxx/next (9e813308a5c1 powerpc/thp: Add tracepoints to track hugepage invalidate)
Merging s390/features (fa0d0b064d55 s390/signal: add sys_sigreturn and sys_rt_sigreturn declarations)
Merging sparc-next/master (9f935675d41a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input)
Merging tile/master (c47b15c4928c arch/tile: update MAINTAINERS email to EZchip)
Merging uml/next (989e59fa41c5 um: Include generic barrier.h)
CONFLICT (content): Merge conflict in arch/um/include/asm/Kbuild
Merging unicore32/unicore32 (d670878e2c9a unicore32: Remove ARCH_HAS_CPUFREQ config option)
Merging xtensa/for_next (1f2fdbd0078c xtensa: disable link optimization)
Merging btrfs/next (1edb647bb954 Btrfs: remove non-sense btrfs_error_discard_extent() function)
Merging ceph/master (388cfdc9bc19 libceph: require cephx message signature by default)
CONFLICT (content): Merge conflict in net/ceph/auth_x.c
CONFLICT (content): Merge conflict in fs/ceph/super.h
CONFLICT (content): Merge conflict in fs/ceph/super.c
CONFLICT (content): Merge conflict in fs/ceph/snap.c
Merging cifs/for-next (0891605dd763 Initialize salt value for negotiate context)
Merging configfs/linux-next (b930c26416c4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs)
Merging ecryptfs/next (942080643bce eCryptfs: Remove buggy and unnecessary write in file name decode routine)
Merging ext3/for_next (3ee3039c5b4d udf: Reduce repeated dereferences)
Merging ext4/dev (363307e6e561 ext4: remove spurious KERN_INFO from ext4_warning call)
Merging f2fs/dev (987b52e65709 f2fs: reuse inode_entry_slab in gc procedure for using slab more effectively)
Merging fscache/fscache (1a8ed18fb7db cachefiles: remove two unused pagevecs.)
CONFLICT (content): Merge conflict in fs/fscache/object.c
Merging fuse/for-next (9759bd518994 fuse: add memory barrier to INIT)
Merging gfs2/master (ec7d879c4576 GFS2: gfs2_atomic_open(): simplify the use of finish_no_open())
Merging jfs/jfs-next (e1f1fe798d2f jfs: get rid of homegrown endianness helpers)
Merging logfs/master (339466142b3f Fix the call to BUG() caused by no free segment found)
Merging nfs/linux-next (4e379d36c050 NFSv4: Remove incorrect check in can_open_delegated())
Merging nfsd/nfsd-next (87409a834dfb nfsd: fi_delegees doesn't need to be an atomic_t)
Merging omfs/for-next (976d167615b6 Linux 3.1-rc9)
Merging overlayfs/overlayfs-next (2b7a8f36f092 ovl: add testsuite to docs)
Merging squashfs/master (62421645bb70 Squashfs: Add LZ4 compression configuration option)
Merging v9fs/for-next (f15844e0777f 9P: fix return value in v9fs_fid_xattr_set)
Merging ubifs/linux-next (f38aed975c0c UBI: Fix invalid vfree())
Merging xfs/for-next (efdca7aa3c41 Merge branch 'xfs-misc-fixes-for-3.20-1' into for-next)
Merging file-locks/linux-next (1b2b32dcdb3d locks: fix fcntl_setlease/getlease return when !CONFIG_FILE_LOCKING)
Merging vfs/for-next (88174fd2c8fb kill d_validate())
Merging pci/next (75f30c3d9949 Merge branches 'pci/host-keystone', 'pci/host-layerscape', 'pci/host-rcar' and 'pci/host-tegra' into next)
Merging hid/for-next (c7d49fb8f675 Merge branch 'for-3.20/upstream' into for-next)
Merging i2c/i2c/for-next (523c5b89640e i2c: Remove support for legacy PM)
Merging jdelvare-hwmon/master (ae530d4403e9 hwmon: (i5500_temp) Convert to use ATTRIBUTE_GROUPS macro)
Merging hwmon-staging/hwmon-next (907a6d582459 hwmon: (tmp401) Detect TMP435 on all addresses it supports)
Merging v4l-dvb/master (2ea3258b238c Merge branch 'patchwork' into to_next)
Merging kbuild/for-next (5f73d9dcf65f Merge branch 'kbuild/misc' into kbuild/for-next)
Merging kconfig/for-next (95edca5c523c localmodconfig: Add config depends by default settings)
Merging libata/for-next (4c6165c6ad53 Merge branch 'for-3.20' into for-next)
Merging pm/linux-next (794c3a0a9380 Merge branches 'acpi-pm', 'acpi-processor' and 'acpi-video')
Merging idle/next (f7c0e22f2d14 Merge branch 'turbostat' into release)
CONFLICT (content): Merge conflict in arch/x86/include/uapi/asm/msr-index.h
Merging apm/for-next (53675abbd1e5 x86, apm: Remove unused variable)
Merging cpupowerutils/master (f16603386b38 cpupower tools: add install target to the debug tools' makefiles)
Merging thermal/next (783f0e5a024e Merge branches 'for-rc', 'int340x-enhancement' and 'int3406-thermal' of .git into next)
Merging thermal-soc/next (9477e18dd5d6 Documentation: thermal: document of_cpufreq_cooling_register())
Merging ieee1394/for-next (d737d7da8e7e firewire: sbp2: replace card lock by target lock)
Merging dlm/next (2ab4bd8ea3a6 dlm: adopt orphan locks)
Merging swiotlb/linux-next (8e0629c1d4ce swiotlb: don't assume PA 0 is invalid)
Merging slave-dma/next (3e8ec65e62df Merge branch 'topic/rcar' into next)
Merging net-next/master (de7b5b3d790a net: eth: xgene: change APM X-Gene SoC platform ethernet to support ACPI)
Merging ipsec-next/master (fbe68ee87522 vti6: Add a lookup method for tunnels with wildcard endpoints.)
Merging wireless-drivers-next/master (8a40084e7bb8 mwifiex: Add support for wowlan disconnect)
Merging bluetooth/master (1c6098eb2b95 bluetooth: btmrvl: increase the priority of firmware download message)
Merging infiniband/for-next (a7cfef21e3d0 Merge branches 'core', 'cxgb4', 'ipoib', 'iser', 'mlx4', 'ocrdma', 'odp' and 'srp' into for-next)
Merging mtd/master (97bf6af1f928 Linux 3.19-rc1)
Merging l2-mtd/master (ed0215cc3b52 mtd: gpmi: Remove "We support only one NAND chip" from bindings doc)
Merging crypto/master (28c29f5657e8 crypto: bfin_crc - Remove unnecessary KERN_ERR in bfin_crc.c)
Merging drm/drm-next (4e0cd6811562 drm: sti: fix module compilation issue)
Merging drm-panel/drm/panel/for-next (54cbc4e298ea drm/mipi-dsi: Avoid potential NULL pointer dereference)
Merging drm-intel/for-linux-next (5d77d9c5e177 drm/i915: add missing rpm ref to i915_gem_pwrite_ioctl)
Merging drm-tegra/drm/tegra/for-next (7e0180e3570c drm/tegra: gem: Check before freeing CMA memory)
Merging drm-misc/topic/core-stuff (b710d754bd4f drm: Make drm_read() more robust against multithreaded races)
Merging sound/for-next (ff6defa6a8fa ALSA: Deletion of checks before the function call "iounmap")
Merging sound-asoc/for-next (92d9815cf236 Merge remote-tracking branches 'asoc/topic/sh', 'asoc/topic/txx9', 'asoc/topic/wm8804' and 'asoc/topic/wm8988' into asoc-next)
Merging modules/modules-next (b0a65b0cccd4 param: do not set store func without write perm)
Merging virtio/virtio-next (c91c2a63913b mic/host: initial virtio 1.0 support)
CONFLICT (content): Merge conflict in drivers/virtio/virtio_pci_common.c
Merging input/next (aa104b1aaaa3 Input: synaptics - remove duplicated code)
Merging input-mt/for-next (5e01dc7b26d9 Linux 3.12)
Merging block/for-next (177ccd2f8f39 Merge branch 'for-3.20/drivers' into for-next)
Merging device-mapper/for-next (af66c8489d6d dm table: train hybrid target type detection to select blk-mq if appropriate)
Merging embedded/master (4744b43431e8 embedded: fix vc_translate operator precedence)
Merging firmware/master (6e03a201bbe8 firmware: speed up request_firmware(), v3)
Merging pcmcia/master (80af9e6d7ae6 pcmcia at91_cf: fix raw gpio number usage)
Merging mmc/mmc-next (11bc9381b277 mmc: sdhci-s3c: use mmc_of_parse and remove the card_tasklet)
Merging mmc-uh/next (60000f69a57a mmc: Add SDIO function devicetree subnode parsing)
Merging kgdb/kgdb-next (0f16996cf2ed kernel/debug/debug_core.c: Logging clean-up)
Merging uclinux/for-next (6dbe51c251a3 Linux 3.9-rc1)
Merging md/for-next (f851b60db0fd md: Check MD_RECOVERY_RUNNING as well as ->sync_thread.)
Merging mfd/for-mfd-next (a3b63979f8a3 mfd: rtsx: Add func to split u32 into register)
Merging backlight/for-backlight-next (3d6969a641d0 MAINTAINERS: Remove my name from Backlight subsystem)
Merging battery/master (02088e3ed79f power: reset: augment versatile driver for integrator)
Merging fbdev/for-next (718b90ac4c21 video: xilinxfb: Simplify error path)
Merging viafb/viafb-next (838ac785d521 viafb: avoid refresh and mode lookup in set_par)
Merging omap_dss2/for-next (574d54112fda Merge branches '3.19/omapdss' and '3.19/simplefb' into for-next)
Merging regulator/for-next (4d450bccaadc Merge remote-tracking branches 'regulator/topic/mt6397', 'regulator/topic/rk808', 'regulator/topic/rt5033' and 'regulator/topic/tps65023' into regulator-next)
Merging security/next (b2d1965dcea1 Merge branch 'next' of git://git.infradead.org/users/pcmoore/selinux into next)
Merging integrity/next (63a0eb7891bd ima: Fix build failure on powerpc when TCG_IBMVTPM dependencies are not met)
Merging selinux/next (566075875a84 selinux: Remove unused function avc_sidcmp())
Merging lblnet/next (d8ec26d7f828 Linux 3.13)
Merging watchdog/master (e0c3e00f4045 watchdog: drop owner assignment from platform_drivers)
Merging iommu/next (2c0ee8b85aae iommu/rockchip: Drop owner assignment from platform_drivers)
Merging dwmw2-iommu/master (1860e379875d Linux 3.15)
Merging vfio/next (5e9f36c59a48 drivers/vfio: allow type-1 IOMMU instantiation on top of an ARM SMMU)
Merging osd/linux-next (1fa3a002b254 Boaz Harrosh - fix email in Documentation)
Merging jc_docs/docs-next (174236285cf8 Merge branch 'doc/sp-update' into docs-next)
Merging trivial/for-next (231821d4c3fa dynamic_debug: fix comment)
Merging audit/next (0f7e94ee40d0 Merge branch 'next' into upstream for v3.19)
Merging fsnotify/for-next (1ca39ab9d21a inotify: automatically restart syscalls)
Merging devicetree/devicetree/next (c46ca3c8310b of: Delete unnecessary check before calling "of_node_put()")
Merging dt-rh/for-next (a0e27f51ba8a documentation: pinctrl bindings: Fix trivial typo 'abitrary')
Merging mailbox/mailbox-for-next (9f3e3cacb2ff dt: mailbox: add generic bindings)
Merging spi/for-next (2b121141d553 Merge remote-tracking branches 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/sh-msiof' and 'spi/topic/st-ssc' into spi-next)
Merging tip/auto-latest (caa523dc2242 Merge branch 'x86/urgent')
Merging clockevents/clockevents/next (b0ad5917960c ARM/ARM64: arch-timer: fix arch_timer_probed logic)
Merging edac/linux_next (fec53af531dd sb_edac: Fix typo computing number of banks)
Merging edac-amd/for-next (775c503f6567 mpc85xx_edac: Fix a typo in comments)
Merging irqchip/irqchip/for-next (97bf6af1f928 Linux 3.19-rc1)
Merging tiny/tiny/next (f114040e3ea6 Linux 3.18-rc1)
Merging ftrace/for-next (d716ff71dd12 tracing: Remove taking of trace_types_lock in pipe files)
Merging rcu/rcu/next (7cf4667519a5 Merge branches 'doc.2015.01.06a', 'fixes.2015.01.06a', 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.06a' and 'torture.2015.01.06a' into HEAD)
Merging uprobes/for-next (0326f5a94dde uprobes/core: Handle breakpoint and singlestep exceptions)
Merging kvm/linux-next (2c4aa55a6af0 Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into HEAD)
Merging kvm-arm/next (05971120fca4 arm/arm64: KVM: Require in-kernel vgic for the arch timers)
Merging kvm-ppc/kvm-ppc-next (476ce5ef09b2 KVM: PPC: Book3S: Enable in-kernel XICS emulation by default)
Merging oprofile/for-next (6ce4eac1f600 Linux 3.13-rc1)
Merging fw-nohz/nohz/next (74876a98a87a printk: Wake up klogd using irq_work)
Merging xen-tip/linux-next (2e917175e1ef xen: Speed up set_phys_to_machine() by using read-only mappings)
Merging percpu/for-next (4c907baf36d8 percpu_ref: implement percpu_ref_is_dying())
Merging workqueues/for-next (008847f66c38 workqueue: allow rescuer thread to do more work.)
Merging drivers-x86/for-next (200db647112d platform/x86/acerhdf: Still depends on THERMAL)
Merging chrome-platform/for-next (5502486a2077 platform/chrome: chromeos_laptop - Add a limit for deferred retries)
Merging sysctl/master (4e474a00d7ff sysctl: protect poll() in entries that may go away)
Merging regmap/for-next (270ded427d7b Merge remote-tracking branch 'regmap/topic/core' into regmap-next)
Merging hsi/for-next (67e9a2ce6e07 hsi: nokia-modem: fix uninitialized device pointer)
Merging leds/for-next (7f95adda052d leds: Use setup_timer)
Merging ipmi/for-next (1421c935df15 ipmi: Fix compile warning with tv_usec)
Merging driver-core/driver-core-next (b7392d2247cf Linux 3.19-rc2)
Merging tty/tty-next (b7392d2247cf Linux 3.19-rc2)
Merging usb/usb-next (b7392d2247cf Linux 3.19-rc2)
Merging usb-gadget/next (b7392d2247cf Linux 3.19-rc2)
Merging usb-serial/usb-next (b7392d2247cf Linux 3.19-rc2)
Merging staging/staging-next (b7392d2247cf Linux 3.19-rc2)
Merging char-misc/char-misc-next (b7392d2247cf Linux 3.19-rc2)
Merging cgroup/for-next (f3ba53802eff cgroup: add dummy css_put() for !CONFIG_CGROUPS)
Merging scsi/for-next (f7ca37fa0ddd Merge branch 'misc' into for-next)
Merging target-updates/for-next (97bf6af1f928 Linux 3.19-rc1)
Merging target-merge/for-next-merge (b28a960c42fc Linux 3.14-rc2)
Merging writeback/writeback-for-next (f9b0e058cbd0 writeback: Fix data corruption on NFS)
Merging hwspinlock/linux-next (8b37fcfc9b34 hwspinlock: add MAINTAINERS entries)
Merging pinctrl/for-next (96dfdff694ae pinctrl: rockchip: Fix enable/disable/mask/unmask)
Merging vhost/linux-next (a1eb03f546d6 virtio_pci: document why we defer kfree)
Merging remoteproc/for-next (9a3c4145af32 Linux 3.16-rc6)
Merging rpmsg/for-next (b1b9891441fa rpmsg: use less buffers when vrings are small)
Merging gpio/for-next (170680abd1eb gpio: mcp23s08: fix up compilation error)
Merging dma-mapping/dma-mapping-next (dda02fd6278d mm, cma: make parameters order consistent in func declaration and definition)
Merging pwm/for-next (39e046f2c1dd pwm: atmel-hlcdc: add at91sam9x5 and sama5d3 errata handling)
Merging dma-buf/for-next (101e31050bf1 dma-buf/fence: Fix one more kerneldoc warning)
Merging userns/for-next (db86da7cb76f userns: Unbreak the unprivileged remount tests)
Merging ktest/for-next (17150fef4ab1 ktest: Add back "tail -1" to kernelrelease make)
Merging signal/for-next (20b4fb485227 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs)
Merging clk/clk-next (f1e9203e2366 clk: samsung: Fix Exynos 5420 pinctrl setup and clock disable failure due to domain being gated)
Merging random/dev (7185ad2672a7 crypto: memzero_explicit - make sure to clear out sensitive data)
Merging lzo-update/lzo-update (42b775abafaf lib/lzo: huge LZO decompression speedup on ARM by using unaligned access)
Merging aio/master (5f785de58873 aio: Skip timer for io_getevents if timeout=0)
Merging llvmlinux/for-next (25d4aee23af2 arm: LLVMLinux: Use global stack register variable for percpu)
Merging documentation/for-next (0415447aa3b4 Documentation: fix broken v4l-utils URL)
Merging kselftest/next (97bf6af1f928 Linux 3.19-rc1)
Merging y2038/y2038 (45446a99cef6 staging: media: lirc: Replace timeval with ktime_t in lirc_parallel.c)
CONFLICT (content): Merge conflict in drivers/staging/media/lirc/lirc_sasem.c
CONFLICT (content): Merge conflict in drivers/staging/ft1000/ft1000-usb/ft1000_debug.c
CONFLICT (content): Merge conflict in drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
Merging luto-misc/next (bced35b65aef x86, traps: Add ist_begin_non_atomic and ist_end_non_atomic)
Merging access_once/linux-next (a91ed664749c kernel: tighten rules for ACCESS ONCE)
Merging omap/for-next (69d2626f97b7 ARM: dts: dra7-evm: fix qspi device tree partition size)
Merging omap-pending/for-next (99d076b74745 MAINTAINERS: add maintainer for OMAP hwmod data)
Merging livepatching/for-next (83ac237a950e livepatch: kconfig: use bool instead of boolean)
Merging akpm-current/current (350b61c87ab5 metag: Align thread_info::supervisor_stack)
CONFLICT (modify/delete): mm/fremap.c deleted in akpm-current/current and modified in HEAD. Version HEAD of mm/fremap.c left in tree.
CONFLICT (content): Merge conflict in fs/ocfs2/aops.c
$ git rm -f mm/fremap.c
$ git checkout -b akpm remotes/origin/akpm/master
Applying: drivers/gpio/gpio-zevio.c: fix build
Applying: drivers/w1/w1_int.c: call put_device if device_register fails
Applying: mm: add strictlimit knob
Merging akpm/master (1b7da92bfa25 mm: add strictlimit knob)

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Re: linux-next: Tree for Jan 7

[Sedat Dilek]

[-- Attachment #1: Type: text/plain, Size: 2471 bytes --]

On Wed, Jan 7, 2015 at 5:16 AM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Hi all,
>
> Changes since 20150106:
>
> *crickets*
>
> Non-merge commits (relative to Linus' tree): 1350
>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
>

Happy new year,

this release is a very special for me.
I had to apply zero null nada patches of mine or others :-).

The calm days between Xmas and new year, I started again to build and
test Linux-next (aka v3.20) kernels .

This was primarily to play with loop-mq from block-next tree.
As a sidenote I reported some bugs in fio, now we have v2.2.4.

En plus, I refreshed my build-script for -next (see attached file).
And I am really happy to see my builddeb patches in kbuild-next.

Thanks to all involved people.

Regards,
- Sedat -

> ----------------------------------------------------------------------------
>
> I have created today's linux-next tree at
> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> (patches at http://www.kernel.org/pub/linux/kernel/next/ ).  If you
> are tracking the linux-next tree using git, you should not use "git pull"
> to do so as that will try to merge the new linux-next release with the
> old one.  You should use "git fetch" and checkout or reset to the new
> master.
>
> You can see which trees have been included by looking in the Next/Trees
> file in the source.  There are also quilt-import.log and merge.log files
> in the Next directory.  Between each merge, the tree was built with
> a ppc64_defconfig for powerpc and an allmodconfig for x86_64 and a
> multi_v7_defconfig for arm. After the final fixups (if any), it is also
> built with powerpc allnoconfig (32 and 64 bit), ppc44x_defconfig and
> allyesconfig (this fails its final link) and i386, sparc, sparc64 and arm
> defconfig.
>
> Below is a summary of the state of the merge.
>
> I am currently merging 234 trees (counting Linus' and 32 trees of patches
> pending for Linus' tree).
>
> Stats about the size of the tree over time can be seen at
> http://neuling.org/linux-next-size.html .
>
> Status of my local build tests will be at
> http://kisskb.ellerman.id.au/linux-next .  If maintainers want to give
> advice about cross compilers/configs that work, we are always open to add
> more builds.
>
> Thanks to Randy Dunlap for doing many randconfig builds.  And to Paul
> Gortmaker for triage and bug fixes.
>
> --
> Cheers,
> Stephen Rothwell                    sfr@canb.auug.org.au
>

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Re: linux-next: Tree for Jan 7

[Guenter Roeck]

On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> Changes since 20150106:
> 
> *crickets*
> 
> Non-merge commits (relative to Linus' tree): 1350
>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> 
> ----------------------------------------------------------------------------
> 

New build failure for sh:dreamcast_defconfig:

arch/sh/mm/gup.c: In function 'gup_get_pte':
arch/sh/mm/gup.c:20:2: error: invalid initializer
make[1]: *** [arch/sh/mm/gup.o] Error 1

bisect log:

# bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
# good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
git bisect start 'HEAD' 'v3.19-rc3'
# good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
# good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
# good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
# bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
# good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
# good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
# good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
# bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
# good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
# good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
# first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE

Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?

Guenter

Re: linux-next: Tree for Jan 7

[Paul E. McKenney]

On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > Hi all,
> > 
> > Changes since 20150106:
> > 
> > *crickets*
> > 
> > Non-merge commits (relative to Linus' tree): 1350
> >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > 
> > ----------------------------------------------------------------------------
> > 
> 
> New build failure for sh:dreamcast_defconfig:
> 
> arch/sh/mm/gup.c: In function 'gup_get_pte':
> arch/sh/mm/gup.c:20:2: error: invalid initializer
> make[1]: *** [arch/sh/mm/gup.o] Error 1
> 
> bisect log:
> 
> # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> git bisect start 'HEAD' 'v3.19-rc3'
> # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> 
> Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?

That is my belief.  What happens when you try it?

							Thanx, Paul

Re: linux-next: Tree for Jan 7

[Guenter Roeck]

On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
> On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> > On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > > Hi all,
> > > 
> > > Changes since 20150106:
> > > 
> > > *crickets*
> > > 
> > > Non-merge commits (relative to Linus' tree): 1350
> > >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > > 
> > > ----------------------------------------------------------------------------
> > > 
> > 
> > New build failure for sh:dreamcast_defconfig:
> > 
> > arch/sh/mm/gup.c: In function 'gup_get_pte':
> > arch/sh/mm/gup.c:20:2: error: invalid initializer
> > make[1]: *** [arch/sh/mm/gup.o] Error 1
> > 
> > bisect log:
> > 
> > # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> > # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> > git bisect start 'HEAD' 'v3.19-rc3'
> > # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> > git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> > # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> > git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> > # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> > git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> > # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> > git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> > # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> > git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> > # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> > git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> > # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> > git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> > # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> > # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> > git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> > # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> > git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> > # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > 
> > Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
> 
> That is my belief.  What happens when you try it?
> 
Build passes, and my qemu tests pass as well. That doesn't mean
that the change is correct, of course, since I don't know if the code
in question is executed.

Should I send a patch with the change ?

Guenter

Re: linux-next: Tree for Jan 7

[Paul E. McKenney]

On Wed, Jan 07, 2015 at 09:30:22AM -0800, Guenter Roeck wrote:
> On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
> > On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> > > On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > > > Hi all,
> > > > 
> > > > Changes since 20150106:
> > > > 
> > > > *crickets*
> > > > 
> > > > Non-merge commits (relative to Linus' tree): 1350
> > > >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > > > 
> > > > ----------------------------------------------------------------------------
> > > > 
> > > 
> > > New build failure for sh:dreamcast_defconfig:
> > > 
> > > arch/sh/mm/gup.c: In function 'gup_get_pte':
> > > arch/sh/mm/gup.c:20:2: error: invalid initializer
> > > make[1]: *** [arch/sh/mm/gup.o] Error 1
> > > 
> > > bisect log:
> > > 
> > > # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> > > # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> > > git bisect start 'HEAD' 'v3.19-rc3'
> > > # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> > > git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> > > # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> > > git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> > > # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> > > git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> > > # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> > > git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> > > # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> > > git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> > > # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> > > git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> > > # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> > > git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> > > # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > > git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> > > # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> > > git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> > > # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> > > git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> > > # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > > 
> > > Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
> > 
> > That is my belief.  What happens when you try it?
> > 
> Build passes, and my qemu tests pass as well. That doesn't mean
> that the change is correct, of course, since I don't know if the code
> in question is executed.

Would it be possible to increment a counter at that location, then
print it out at some convenient point?

> Should I send a patch with the change ?

I believe such a patch is needed.  Testing would be good, but the patch
is what we were thinking of for this situation.

							Thanx, Paul

Re: linux-next: Tree for Jan 7

[Guenter Roeck]

On Wed, Jan 07, 2015 at 10:09:22AM -0800, Paul E. McKenney wrote:
> On Wed, Jan 07, 2015 at 09:30:22AM -0800, Guenter Roeck wrote:
> > On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
> > > On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> > > > On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > > > > Hi all,
> > > > > 
> > > > > Changes since 20150106:
> > > > > 
> > > > > *crickets*
> > > > > 
> > > > > Non-merge commits (relative to Linus' tree): 1350
> > > > >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > > > > 
> > > > > ----------------------------------------------------------------------------
> > > > > 
> > > > 
> > > > New build failure for sh:dreamcast_defconfig:
> > > > 
> > > > arch/sh/mm/gup.c: In function 'gup_get_pte':
> > > > arch/sh/mm/gup.c:20:2: error: invalid initializer
> > > > make[1]: *** [arch/sh/mm/gup.o] Error 1
> > > > 
> > > > bisect log:
> > > > 
> > > > # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> > > > # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> > > > git bisect start 'HEAD' 'v3.19-rc3'
> > > > # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> > > > git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> > > > # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> > > > git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> > > > # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> > > > git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> > > > # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> > > > git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> > > > # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> > > > git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> > > > # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> > > > git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> > > > # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> > > > git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> > > > # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > > > git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> > > > # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> > > > git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> > > > # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> > > > git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> > > > # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> > > > 
> > > > Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
> > > 
> > > That is my belief.  What happens when you try it?
> > > 
> > Build passes, and my qemu tests pass as well. That doesn't mean
> > that the change is correct, of course, since I don't know if the code
> > in question is executed.
> 
> Would it be possible to increment a counter at that location, then
> print it out at some convenient point?
> 
I made it simpler and just added a call to panic() ... which had no effect,
so the function is not called in my qemu tests. Any idea what I would have
to do to trigger a call ?

> > Should I send a patch with the change ?
> 
> I believe such a patch is needed.  Testing would be good, but the patch
> is what we were thinking of for this situation.
> 
I'll probably send a patch marked "compile-tested only" if I can't find a way
to test the change.

Guenter

Re: linux-next: Tree for Jan 7

[Christian Borntraeger]

Am 07.01.2015 um 20:18 schrieb Guenter Roeck:
> On Wed, Jan 07, 2015 at 10:09:22AM -0800, Paul E. McKenney wrote:
>> On Wed, Jan 07, 2015 at 09:30:22AM -0800, Guenter Roeck wrote:
>>> On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
>>>> On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
>>>>> On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
>>>>>> Hi all,
>>>>>>
>>>>>> Changes since 20150106:
>>>>>>
>>>>>> *crickets*
>>>>>>
>>>>>> Non-merge commits (relative to Linus' tree): 1350
>>>>>>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
>>>>>>
>>>>>> ----------------------------------------------------------------------------
>>>>>>
>>>>>
>>>>> New build failure for sh:dreamcast_defconfig:
>>>>>
>>>>> arch/sh/mm/gup.c: In function 'gup_get_pte':
>>>>> arch/sh/mm/gup.c:20:2: error: invalid initializer
>>>>> make[1]: *** [arch/sh/mm/gup.o] Error 1
>>>>>
>>>>> bisect log:
>>>>>
>>>>> # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
>>>>> # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
>>>>> git bisect start 'HEAD' 'v3.19-rc3'
>>>>> # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
>>>>> git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
>>>>> # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
>>>>> git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
>>>>> # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
>>>>> git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
>>>>> # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
>>>>> git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
>>>>> # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
>>>>> git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
>>>>> # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
>>>>> git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
>>>>> # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
>>>>> git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
>>>>> # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
>>>>> git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
>>>>> # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
>>>>> git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
>>>>> # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
>>>>> git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
>>>>> # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
>>>>>
>>>>> Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
>>>>
>>>> That is my belief.  What happens when you try it?
>>>>
>>> Build passes, and my qemu tests pass as well. That doesn't mean
>>> that the change is correct, of course, since I don't know if the code
>>> in question is executed.
>>
>> Would it be possible to increment a counter at that location, then
>> print it out at some convenient point?
>>
> I made it simpler and just added a call to panic() ... which had no effect,
> so the function is not called in my qemu tests. Any idea what I would have
> to do to trigger a call ?
> 
>>> Should I send a patch with the change ?
>>
>> I believe such a patch is needed.  Testing would be good, but the patch
>> is what we were thinking of for this situation.
>>
> I'll probably send a patch marked "compile-tested only" if I can't find a way
> to test the change.

I was going to fix as well, but I can certainly take your patch. Can you send it with proper signed-off-by etc and I will add it to the access_once tree?

Christian

Re: linux-next: Tree for Jan 7

[Guenter Roeck]

On Wed, Jan 07, 2015 at 09:00:34PM +0100, Christian Borntraeger wrote:
> Am 07.01.2015 um 20:18 schrieb Guenter Roeck:
> > On Wed, Jan 07, 2015 at 10:09:22AM -0800, Paul E. McKenney wrote:
> >> On Wed, Jan 07, 2015 at 09:30:22AM -0800, Guenter Roeck wrote:
> >>> On Wed, Jan 07, 2015 at 08:33:10AM -0800, Paul E. McKenney wrote:
> >>>> On Wed, Jan 07, 2015 at 06:26:56AM -0800, Guenter Roeck wrote:
> >>>>> On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> >>>>>> Hi all,
> >>>>>>
> >>>>>> Changes since 20150106:
> >>>>>>
> >>>>>> *crickets*
> >>>>>>
> >>>>>> Non-merge commits (relative to Linus' tree): 1350
> >>>>>>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> >>>>>>
> >>>>>> ----------------------------------------------------------------------------
> >>>>>>
> >>>>>
> >>>>> New build failure for sh:dreamcast_defconfig:
> >>>>>
> >>>>> arch/sh/mm/gup.c: In function 'gup_get_pte':
> >>>>> arch/sh/mm/gup.c:20:2: error: invalid initializer
> >>>>> make[1]: *** [arch/sh/mm/gup.o] Error 1
> >>>>>
> >>>>> bisect log:
> >>>>>
> >>>>> # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> >>>>> # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> >>>>> git bisect start 'HEAD' 'v3.19-rc3'
> >>>>> # good: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> >>>>> git bisect good c48667c5659248ff2b2fbff5cd23c43b5768e81b
> >>>>> # good: [b8cf629ce7d554711dd7ab256b00e6110355e1d7] Merge remote-tracking branch 'mmc-uh/next'
> >>>>> git bisect good b8cf629ce7d554711dd7ab256b00e6110355e1d7
> >>>>> # good: [cc52ff032bc2d91c78d7cf9aefcfa9e266ace816] Merge remote-tracking branch 'rcu/rcu/next'
> >>>>> git bisect good cc52ff032bc2d91c78d7cf9aefcfa9e266ace816
> >>>>> # bad: [9634277bcdab7b9d6a91409dc11d85502aa2e74b] Merge remote-tracking branch 'access_once/linux-next'
> >>>>> git bisect bad 9634277bcdab7b9d6a91409dc11d85502aa2e74b
> >>>>> # good: [261379560ee6aa65b4869c94eda0d3d60773aca3] Merge remote-tracking branch 'scsi/for-next'
> >>>>> git bisect good 261379560ee6aa65b4869c94eda0d3d60773aca3
> >>>>> # good: [38d45afa56bfca714780e45532760d64cd53b65b] Merge remote-tracking branch 'llvmlinux/for-next'
> >>>>> git bisect good 38d45afa56bfca714780e45532760d64cd53b65b
> >>>>> # good: [9afbe1ce2403c7d097bfaafcc5b27950040f7608] Merge remote-tracking branch 'y2038/y2038'
> >>>>> git bisect good 9afbe1ce2403c7d097bfaafcc5b27950040f7608
> >>>>> # bad: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> >>>>> git bisect bad a91ed664749cbec0325ef9da7d12619d9bb72e2d
> >>>>> # good: [e3865cc4a17e979e6b2f26af026686fae5567096] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
> >>>>> git bisect good e3865cc4a17e979e6b2f26af026686fae5567096
> >>>>> # good: [e2579c6f22ee0a43394d603cef6989dca98c5610] mm/gup: Replace ACCESS_ONCE with READ_ONCE
> >>>>> git bisect good e2579c6f22ee0a43394d603cef6989dca98c5610
> >>>>> # first bad commit: [a91ed664749cbec0325ef9da7d12619d9bb72e2d] kernel: tighten rules for ACCESS ONCE
> >>>>>
> >>>>> Maybe the ACCESS_ONCE in the affected file should be replaced with READ_ONCE ?
> >>>>
> >>>> That is my belief.  What happens when you try it?
> >>>>
> >>> Build passes, and my qemu tests pass as well. That doesn't mean
> >>> that the change is correct, of course, since I don't know if the code
> >>> in question is executed.
> >>
> >> Would it be possible to increment a counter at that location, then
> >> print it out at some convenient point?
> >>
> > I made it simpler and just added a call to panic() ... which had no effect,
> > so the function is not called in my qemu tests. Any idea what I would have
> > to do to trigger a call ?
> > 
> >>> Should I send a patch with the change ?
> >>
> >> I believe such a patch is needed.  Testing would be good, but the patch
> >> is what we were thinking of for this situation.
> >>
> > I'll probably send a patch marked "compile-tested only" if I can't find a way
> > to test the change.
> 
> I was going to fix as well, but I can certainly take your patch. Can you send it with proper signed-off-by etc and I will add it to the access_once tree?
> 
Done.

Thanks,
Guenter

Re: linux-next: Tree for Jan 7 (microblaze qemu problems)

[Guenter Roeck]

On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> Changes since 20150106:
> 
> *crickets*
> 
> Non-merge commits (relative to Linus' tree): 1350
>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> 

With this kernel I get the following WARNINGs (lots of htem) when running
microblaze images (both big and little endian) with qemu.

WARNING: CPU: 0 PID: 1 at arch/microblaze/kernel/cpu/cache.c:432
__invalidate_dcache_range_msr_irq_wt+0xcc/0xd8()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 3.19.0-rc3-next-20150107 #1
...
(sample) Call Trace:
[<c0004080>] microblaze_unwind+0x5c/0x78
[<c0003d64>] show_stack+0xe0/0x164
[<c02e2224>] dump_stack+0x20/0x38
[<c000adbc>] warn_slowpath_common+0x90/0xec
[<c000aea0>] warn_slowpath_null+0xc/0x24
[<c000493c>] __invalidate_dcache_range_msr_irq_wt+0xc0/0xd8
[<c00c59c4>] simple_write_begin+0xf8/0x170
[<c005d18c>] generic_perform_write+0xa8/0x2ac
[<c005f1f8>] __generic_file_write_iter+0x1a8/0x478
[<c005f504>] generic_file_write_iter+0x3c/0x128
[<c009b0c4>] new_sync_write+0x84/0xcc
[<c009ba88>] vfs_write+0xe8/0x224
[<c009c314>] SyS_write+0x4c/0xf4
[<c03d5200>] xwrite+0x48/0xb8
[<c03d52a0>] do_copy+0x30/0x1ac
[<c03d47b4>] write_buffer+0x34/0x60
[<c03d4810>] flush_buffer+0x30/0xd0
[<c03e4c70>] gunzip+0x2c0/0x3ac
[<c03d4c20>] unpack_to_rootfs+0x1b8/0x368
[<c03d56e8>] populate_rootfs+0x28/0x2d8
[<c000044c>] do_one_initcall+0xa0/0x24c
[<c03d2d9c>] kernel_init_freeable+0x150/0x238
[<c02dedf0>] kernel_init+0x8/0x14c
[<c0005d78>] ret_from_kernel_thread+0x8/0x20

Detailed logs are available at http://server.roeck-us.net:8010/builders.

bisect results:

# bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
# good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
git bisect start 'HEAD' 'v3.19-rc3'
# bad: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
git bisect bad c48667c5659248ff2b2fbff5cd23c43b5768e81b
# bad: [5aa2843082a0ce9b710549bdc7ae8d54140edc70] Merge remote-tracking branch 'pci/next'
git bisect bad 5aa2843082a0ce9b710549bdc7ae8d54140edc70
# good: [11339e9e3d575c1486ff57dc49c83b6154918305] Merge remote-tracking branch 'samsung/for-next'
git bisect good 11339e9e3d575c1486ff57dc49c83b6154918305
# bad: [50d16e144b253542d89830c0ace8573a67ce4b16] Merge remote-tracking branch 'powerpc-mpe/next'
git bisect bad 50d16e144b253542d89830c0ace8573a67ce4b16
# good: [3fda5c0dda2eafe244898809a74831209cdb69b7] Merge remote-tracking branch 'cris/for-next'
git bisect good 3fda5c0dda2eafe244898809a74831209cdb69b7
# bad: [8b772494fda25dd998ade5621cc0684a5c897179] Merge remote-tracking branch 'microblaze/next'
git bisect bad 8b772494fda25dd998ade5621cc0684a5c897179
# bad: [cd2b00db005541d15ea9fbb474b5e5e98b993d8e] microblaze: Fix variable types to remove W=1 warning
git bisect bad cd2b00db005541d15ea9fbb474b5e5e98b993d8e
# good: [8543e6c96762fcc930af5725088c2b9e4865c3aa] microblaze: Use unsigned return type in do_syscall_trace_enter
git bisect good 8543e6c96762fcc930af5725088c2b9e4865c3aa
# good: [e76fdb324844cc0367f8c6ea5d13278a81568ccb] microblaze: Use unsigned type for "for" loop because of comparison-kgdb.c
git bisect good e76fdb324844cc0367f8c6ea5d13278a81568ccb
# bad: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c
git bisect bad b343c7d621bf801b502cba812c3dcb4320942b93
# good: [bdb96e3cad21f5973c95f0e6687db4a57eff7c53] microblaze: Use unsigned type for proper comparison in cpuinfo*.c
git bisect good bdb96e3cad21f5973c95f0e6687db4a57eff7c53
# first bad commit: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c

Reverting the offending commit fixes the problem.

Guenter

Re: linux-next: Tree for Jan 7 (microblaze qemu problems)

[Guenter Roeck]

On Wed, Jan 07, 2015 at 01:45:30PM -0800, Guenter Roeck wrote:
> On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
> > Hi all,
> > 
> > Changes since 20150106:
> > 
> > *crickets*
> > 
> > Non-merge commits (relative to Linus' tree): 1350
> >  1543 files changed, 41856 insertions(+), 24250 deletions(-)
> > 
> 
> With this kernel I get the following WARNINGs (lots of htem) when running
> microblaze images (both big and little endian) with qemu.
> 
> WARNING: CPU: 0 PID: 1 at arch/microblaze/kernel/cpu/cache.c:432
> __invalidate_dcache_range_msr_irq_wt+0xcc/0xd8()
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Not tainted 3.19.0-rc3-next-20150107 #1
> ...
> (sample) Call Trace:
> [<c0004080>] microblaze_unwind+0x5c/0x78
> [<c0003d64>] show_stack+0xe0/0x164
> [<c02e2224>] dump_stack+0x20/0x38
> [<c000adbc>] warn_slowpath_common+0x90/0xec
> [<c000aea0>] warn_slowpath_null+0xc/0x24
> [<c000493c>] __invalidate_dcache_range_msr_irq_wt+0xc0/0xd8
> [<c00c59c4>] simple_write_begin+0xf8/0x170
> [<c005d18c>] generic_perform_write+0xa8/0x2ac
> [<c005f1f8>] __generic_file_write_iter+0x1a8/0x478
> [<c005f504>] generic_file_write_iter+0x3c/0x128
> [<c009b0c4>] new_sync_write+0x84/0xcc
> [<c009ba88>] vfs_write+0xe8/0x224
> [<c009c314>] SyS_write+0x4c/0xf4
> [<c03d5200>] xwrite+0x48/0xb8
> [<c03d52a0>] do_copy+0x30/0x1ac
> [<c03d47b4>] write_buffer+0x34/0x60
> [<c03d4810>] flush_buffer+0x30/0xd0
> [<c03e4c70>] gunzip+0x2c0/0x3ac
> [<c03d4c20>] unpack_to_rootfs+0x1b8/0x368
> [<c03d56e8>] populate_rootfs+0x28/0x2d8
> [<c000044c>] do_one_initcall+0xa0/0x24c
> [<c03d2d9c>] kernel_init_freeable+0x150/0x238
> [<c02dedf0>] kernel_init+0x8/0x14c
> [<c0005d78>] ret_from_kernel_thread+0x8/0x20
> 
> Detailed logs are available at http://server.roeck-us.net:8010/builders.
> 
> bisect results:
> 
> # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
> # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
> git bisect start 'HEAD' 'v3.19-rc3'
> # bad: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
> git bisect bad c48667c5659248ff2b2fbff5cd23c43b5768e81b
> # bad: [5aa2843082a0ce9b710549bdc7ae8d54140edc70] Merge remote-tracking branch 'pci/next'
> git bisect bad 5aa2843082a0ce9b710549bdc7ae8d54140edc70
> # good: [11339e9e3d575c1486ff57dc49c83b6154918305] Merge remote-tracking branch 'samsung/for-next'
> git bisect good 11339e9e3d575c1486ff57dc49c83b6154918305
> # bad: [50d16e144b253542d89830c0ace8573a67ce4b16] Merge remote-tracking branch 'powerpc-mpe/next'
> git bisect bad 50d16e144b253542d89830c0ace8573a67ce4b16
> # good: [3fda5c0dda2eafe244898809a74831209cdb69b7] Merge remote-tracking branch 'cris/for-next'
> git bisect good 3fda5c0dda2eafe244898809a74831209cdb69b7
> # bad: [8b772494fda25dd998ade5621cc0684a5c897179] Merge remote-tracking branch 'microblaze/next'
> git bisect bad 8b772494fda25dd998ade5621cc0684a5c897179
> # bad: [cd2b00db005541d15ea9fbb474b5e5e98b993d8e] microblaze: Fix variable types to remove W=1 warning
> git bisect bad cd2b00db005541d15ea9fbb474b5e5e98b993d8e
> # good: [8543e6c96762fcc930af5725088c2b9e4865c3aa] microblaze: Use unsigned return type in do_syscall_trace_enter
> git bisect good 8543e6c96762fcc930af5725088c2b9e4865c3aa
> # good: [e76fdb324844cc0367f8c6ea5d13278a81568ccb] microblaze: Use unsigned type for "for" loop because of comparison-kgdb.c
> git bisect good e76fdb324844cc0367f8c6ea5d13278a81568ccb
> # bad: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c
> git bisect bad b343c7d621bf801b502cba812c3dcb4320942b93
> # good: [bdb96e3cad21f5973c95f0e6687db4a57eff7c53] microblaze: Use unsigned type for proper comparison in cpuinfo*.c
> git bisect good bdb96e3cad21f5973c95f0e6687db4a57eff7c53
> # first bad commit: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c
> 
> Reverting the offending commit fixes the problem.
> 
Followup: I think the following should fix the problem.
My qemu tests pass with this change.

Original patch:

-	WARN_ON(end - start < 0);                                       \
+	WARN_ON(end > start);                                   \

This looks wrong, since 'end - start < 0' is equivalent to 'end < start',
not 'end > start'.

Guenter

---
diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
index 84c9558..0bde47e 100644
--- a/arch/microblaze/kernel/cpu/cache.c
+++ b/arch/microblaze/kernel/cpu/cache.c
@@ -143,7 +143,7 @@ do {									\
 	unsigned int volatile temp = 0;						\
 	unsigned int align = ~(line_length - 1);					\
 	end = ((end & align) == end) ? end - line_length : end & align;	\
-	WARN_ON(end > start);					\
+	WARN_ON(end < start);					\
 									\
 	__asm__ __volatile__ (" 1:	" #op "	%1, r0;"		\
 					"cmpu	%0, %1, %2;"		\

Re: linux-next: Tree for Jan 7 (microblaze qemu problems)

[Michal Simek]

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On 01/08/2015 06:58 AM, Guenter Roeck wrote:
> On Wed, Jan 07, 2015 at 01:45:30PM -0800, Guenter Roeck wrote:
>> On Wed, Jan 07, 2015 at 03:16:18PM +1100, Stephen Rothwell wrote:
>>> Hi all,
>>>
>>> Changes since 20150106:
>>>
>>> *crickets*
>>>
>>> Non-merge commits (relative to Linus' tree): 1350
>>>  1543 files changed, 41856 insertions(+), 24250 deletions(-)
>>>
>>
>> With this kernel I get the following WARNINGs (lots of htem) when running
>> microblaze images (both big and little endian) with qemu.
>>
>> WARNING: CPU: 0 PID: 1 at arch/microblaze/kernel/cpu/cache.c:432
>> __invalidate_dcache_range_msr_irq_wt+0xcc/0xd8()
>> Modules linked in:
>> CPU: 0 PID: 1 Comm: swapper Not tainted 3.19.0-rc3-next-20150107 #1
>> ...
>> (sample) Call Trace:
>> [<c0004080>] microblaze_unwind+0x5c/0x78
>> [<c0003d64>] show_stack+0xe0/0x164
>> [<c02e2224>] dump_stack+0x20/0x38
>> [<c000adbc>] warn_slowpath_common+0x90/0xec
>> [<c000aea0>] warn_slowpath_null+0xc/0x24
>> [<c000493c>] __invalidate_dcache_range_msr_irq_wt+0xc0/0xd8
>> [<c00c59c4>] simple_write_begin+0xf8/0x170
>> [<c005d18c>] generic_perform_write+0xa8/0x2ac
>> [<c005f1f8>] __generic_file_write_iter+0x1a8/0x478
>> [<c005f504>] generic_file_write_iter+0x3c/0x128
>> [<c009b0c4>] new_sync_write+0x84/0xcc
>> [<c009ba88>] vfs_write+0xe8/0x224
>> [<c009c314>] SyS_write+0x4c/0xf4
>> [<c03d5200>] xwrite+0x48/0xb8
>> [<c03d52a0>] do_copy+0x30/0x1ac
>> [<c03d47b4>] write_buffer+0x34/0x60
>> [<c03d4810>] flush_buffer+0x30/0xd0
>> [<c03e4c70>] gunzip+0x2c0/0x3ac
>> [<c03d4c20>] unpack_to_rootfs+0x1b8/0x368
>> [<c03d56e8>] populate_rootfs+0x28/0x2d8
>> [<c000044c>] do_one_initcall+0xa0/0x24c
>> [<c03d2d9c>] kernel_init_freeable+0x150/0x238
>> [<c02dedf0>] kernel_init+0x8/0x14c
>> [<c0005d78>] ret_from_kernel_thread+0x8/0x20
>>
>> Detailed logs are available at http://server.roeck-us.net:8010/builders.
>>
>> bisect results:
>>
>> # bad: [7e3619a6de57f0257a2f6480182d2287ee05e314] Add linux-next specific files for 20150107
>> # good: [b1940cd21c0f4abdce101253e860feff547291b0] Linux 3.19-rc3
>> git bisect start 'HEAD' 'v3.19-rc3'
>> # bad: [c48667c5659248ff2b2fbff5cd23c43b5768e81b] Merge remote-tracking branch 'net-next/master'
>> git bisect bad c48667c5659248ff2b2fbff5cd23c43b5768e81b
>> # bad: [5aa2843082a0ce9b710549bdc7ae8d54140edc70] Merge remote-tracking branch 'pci/next'
>> git bisect bad 5aa2843082a0ce9b710549bdc7ae8d54140edc70
>> # good: [11339e9e3d575c1486ff57dc49c83b6154918305] Merge remote-tracking branch 'samsung/for-next'
>> git bisect good 11339e9e3d575c1486ff57dc49c83b6154918305
>> # bad: [50d16e144b253542d89830c0ace8573a67ce4b16] Merge remote-tracking branch 'powerpc-mpe/next'
>> git bisect bad 50d16e144b253542d89830c0ace8573a67ce4b16
>> # good: [3fda5c0dda2eafe244898809a74831209cdb69b7] Merge remote-tracking branch 'cris/for-next'
>> git bisect good 3fda5c0dda2eafe244898809a74831209cdb69b7
>> # bad: [8b772494fda25dd998ade5621cc0684a5c897179] Merge remote-tracking branch 'microblaze/next'
>> git bisect bad 8b772494fda25dd998ade5621cc0684a5c897179
>> # bad: [cd2b00db005541d15ea9fbb474b5e5e98b993d8e] microblaze: Fix variable types to remove W=1 warning
>> git bisect bad cd2b00db005541d15ea9fbb474b5e5e98b993d8e
>> # good: [8543e6c96762fcc930af5725088c2b9e4865c3aa] microblaze: Use unsigned return type in do_syscall_trace_enter
>> git bisect good 8543e6c96762fcc930af5725088c2b9e4865c3aa
>> # good: [e76fdb324844cc0367f8c6ea5d13278a81568ccb] microblaze: Use unsigned type for "for" loop because of comparison-kgdb.c
>> git bisect good e76fdb324844cc0367f8c6ea5d13278a81568ccb
>> # bad: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c
>> git bisect bad b343c7d621bf801b502cba812c3dcb4320942b93
>> # good: [bdb96e3cad21f5973c95f0e6687db4a57eff7c53] microblaze: Use unsigned type for proper comparison in cpuinfo*.c
>> git bisect good bdb96e3cad21f5973c95f0e6687db4a57eff7c53
>> # first bad commit: [b343c7d621bf801b502cba812c3dcb4320942b93] microblaze: Use unsigned type for limit comparison in cache.c
>>
>> Reverting the offending commit fixes the problem.
>>
> Followup: I think the following should fix the problem.
> My qemu tests pass with this change.
> 
> Original patch:
> 
> -	WARN_ON(end - start < 0);                                       \
> +	WARN_ON(end > start);                                   \
> 
> This looks wrong, since 'end - start < 0' is equivalent to 'end < start',
> not 'end > start'.
> 
> Guenter
> 
> ---
> diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c
> index 84c9558..0bde47e 100644
> --- a/arch/microblaze/kernel/cpu/cache.c
> +++ b/arch/microblaze/kernel/cpu/cache.c
> @@ -143,7 +143,7 @@ do {									\
>  	unsigned int volatile temp = 0;						\
>  	unsigned int align = ~(line_length - 1);					\
>  	end = ((end & align) == end) ? end - line_length : end & align;	\
> -	WARN_ON(end > start);					\
> +	WARN_ON(end < start);					\
>  									\
>  	__asm__ __volatile__ (" 1:	" #op "	%1, r0;"		\
>  					"cmpu	%0, %1, %2;"		\

yes - you are right.

Thanks for reporting this. Will fix it.

Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform



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