[GIT PULL] mmiowb() removal for 5.2

From: Will Deacon
Date: Mon May 06 2019 - 14:12:01 EST

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Hi Linus,

Here's the mmiowb() removal series ready for 5.2. The only relatively
recent changes have been addressing review comments on the documentation,
which is in a much better shape thanks to the efforts of Ben and Ingo.

I was initially planning to split this into two pull requests so that you
could run the coccinelle script yourself, however it's been plain sailing
in linux-next so I've just included the whole lot here to keep things
simple.

There is a trivial conflict in the S390 asm/Kbuild file with the rwsem
changes in -tip, but I think that's it.

Please pull,

Will

--->8

The following changes since commit 79a3aaa7b82e3106be97842dedfd8429248896e6:

Linux 5.1-rc3 (2019-03-31 14:39:29 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-mmiowb

for you to fetch changes up to 9726840d9cf0d42377e1591263d7c1d9ae0988ac:

docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread (2019-04-23 13:34:17 +0100)

----------------------------------------------------------------
Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())

Remove mmiowb() from the kernel memory barrier API and instead, for
architectures that need it, hide the barrier inside spin_unlock() when
MMIO has been performed inside the critical section.

----------------------------------------------------------------
Will Deacon (23):
docs/memory-barriers.txt: Rewrite "KERNEL I/O BARRIER EFFECTS" section
asm-generic/mmiowb: Add generic implementation of mmiowb() tracking
arch: Use asm-generic header for asm/mmiowb.h
mmiowb: Hook up mmiowb helpers to spinlocks and generic I/O accessors
ARM/io: Remove useless definition of mmiowb()
arm64/io: Remove useless definition of mmiowb()
x86/io: Remove useless definition of mmiowb()
nds32/io: Remove useless definition of mmiowb()
m68k/io: Remove useless definition of mmiowb()
sh/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
ia64/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code
riscv/mmiowb: Hook up mmwiob() implementation to asm-generic code
Documentation: Kill all references to mmiowb()
drivers: Remove useless trailing comments from mmiowb() invocations
drivers: Remove explicit invocations of mmiowb()
scsi/qla1280: Remove stale comment about mmiowb()
i40iw: Redefine i40iw_mmiowb() to do nothing
net/ethernet/silan/sc92031: Remove stale comment about mmiowb()
arch: Remove dummy mmiowb() definitions from arch code
docs/memory-barriers.txt: Fix style, spacing and grammar in I/O section
docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread

Documentation/driver-api/device-io.rst | 45 ----
Documentation/driver-api/pci/p2pdma.rst | 4 -
Documentation/memory-barriers.txt | 249 +++++++++------------
arch/alpha/include/asm/Kbuild | 1 +
arch/alpha/include/asm/io.h | 2 -
arch/arc/include/asm/Kbuild | 1 +
arch/arm/include/asm/Kbuild | 1 +
arch/arm/include/asm/io.h | 2 -
arch/arm64/include/asm/Kbuild | 1 +
arch/arm64/include/asm/io.h | 2 -
arch/c6x/include/asm/Kbuild | 1 +
arch/csky/include/asm/Kbuild | 1 +
arch/h8300/include/asm/Kbuild | 1 +
arch/hexagon/include/asm/Kbuild | 1 +
arch/hexagon/include/asm/io.h | 2 -
arch/ia64/include/asm/io.h | 17 --
arch/ia64/include/asm/mmiowb.h | 25 +++
arch/ia64/include/asm/spinlock.h | 2 +
arch/m68k/include/asm/Kbuild | 1 +
arch/m68k/include/asm/io_mm.h | 2 -
arch/microblaze/include/asm/Kbuild | 1 +
arch/mips/include/asm/io.h | 3 -
arch/mips/include/asm/mmiowb.h | 11 +
arch/mips/include/asm/spinlock.h | 15 ++
arch/nds32/include/asm/Kbuild | 1 +
arch/nds32/include/asm/io.h | 2 -
arch/nios2/include/asm/Kbuild | 1 +
arch/openrisc/include/asm/Kbuild | 1 +
arch/parisc/include/asm/Kbuild | 1 +
arch/parisc/include/asm/io.h | 2 -
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/io.h | 33 +--
arch/powerpc/include/asm/mmiowb.h | 18 ++
arch/powerpc/include/asm/paca.h | 6 +-
arch/powerpc/include/asm/spinlock.h | 17 --
arch/powerpc/xmon/xmon.c | 5 +-
arch/riscv/Kconfig | 1 +
arch/riscv/include/asm/io.h | 15 +-
arch/riscv/include/asm/mmiowb.h | 14 ++
arch/s390/include/asm/Kbuild | 1 +
arch/sh/include/asm/io.h | 3 -
arch/sh/include/asm/mmiowb.h | 12 +
arch/sh/include/asm/spinlock-llsc.h | 2 +
arch/sparc/include/asm/Kbuild | 1 +
arch/sparc/include/asm/io_64.h | 2 -
arch/um/include/asm/Kbuild | 1 +
arch/unicore32/include/asm/Kbuild | 1 +
arch/x86/include/asm/Kbuild | 1 +
arch/x86/include/asm/io.h | 2 -
arch/xtensa/include/asm/Kbuild | 1 +
drivers/crypto/cavium/nitrox/nitrox_reqmgr.c | 4 -
drivers/dma/txx9dmac.c | 3 -
drivers/firewire/ohci.c | 1 -
drivers/gpu/drm/i915/intel_hdmi.c | 10 -
drivers/ide/tx4939ide.c | 2 -
drivers/infiniband/hw/hfi1/chip.c | 3 -
drivers/infiniband/hw/hfi1/pio.c | 1 -
drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 2 -
drivers/infiniband/hw/i40iw/i40iw_osdep.h | 2 +-
drivers/infiniband/hw/mlx4/qp.c | 6 -
drivers/infiniband/hw/mlx5/qp.c | 1 -
drivers/infiniband/hw/mthca/mthca_cmd.c | 6 -
drivers/infiniband/hw/mthca/mthca_cq.c | 5 -
drivers/infiniband/hw/mthca/mthca_qp.c | 17 --
drivers/infiniband/hw/mthca/mthca_srq.c | 6 -
drivers/infiniband/hw/qedr/verbs.c | 12 -
drivers/infiniband/hw/qib/qib_iba6120.c | 4 -
drivers/infiniband/hw/qib/qib_iba7220.c | 3 -
drivers/infiniband/hw/qib/qib_iba7322.c | 3 -
drivers/infiniband/hw/qib/qib_sd7220.c | 4 -
drivers/media/pci/dt3155/dt3155.c | 8 -
drivers/memstick/host/jmb38x_ms.c | 4 -
drivers/misc/ioc4.c | 2 -
drivers/misc/mei/hw-me.c | 3 -
drivers/misc/tifm_7xx1.c | 1 -
drivers/mmc/host/alcor.c | 1 -
drivers/mmc/host/sdhci.c | 13 --
drivers/mmc/host/tifm_sd.c | 3 -
drivers/mmc/host/via-sdmmc.c | 10 -
drivers/mtd/nand/raw/r852.c | 2 -
drivers/mtd/nand/raw/txx9ndfmc.c | 1 -
drivers/net/ethernet/aeroflex/greth.c | 1 -
drivers/net/ethernet/alacritech/slicoss.c | 4 -
drivers/net/ethernet/amazon/ena/ena_com.c | 1 -
drivers/net/ethernet/atheros/atlx/atl1.c | 1 -
drivers/net/ethernet/atheros/atlx/atl2.c | 1 -
drivers/net/ethernet/broadcom/bnx2.c | 4 -
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 2 -
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h | 4 -
.../net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c | 1 -
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 29 ---
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c | 1 -
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 2 -
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c | 4 -
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 3 -
drivers/net/ethernet/broadcom/tg3.c | 6 -
.../net/ethernet/cavium/liquidio/cn66xx_device.c | 10 -
.../net/ethernet/cavium/liquidio/octeon_device.c | 1 -
drivers/net/ethernet/cavium/liquidio/octeon_droq.c | 4 -
.../net/ethernet/cavium/liquidio/request_manager.c | 1 -
drivers/net/ethernet/intel/e1000/e1000_main.c | 5 -
drivers/net/ethernet/intel/e1000e/netdev.c | 7 -
drivers/net/ethernet/intel/fm10k/fm10k_iov.c | 2 -
drivers/net/ethernet/intel/fm10k/fm10k_main.c | 5 -
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 5 -
drivers/net/ethernet/intel/iavf/iavf_txrx.c | 5 -
drivers/net/ethernet/intel/ice/ice_txrx.c | 5 -
drivers/net/ethernet/intel/igb/igb_main.c | 5 -
drivers/net/ethernet/intel/igbvf/netdev.c | 4 -
drivers/net/ethernet/intel/igc/igc_main.c | 5 -
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 5 -
drivers/net/ethernet/marvell/sky2.c | 4 -
drivers/net/ethernet/mellanox/mlx4/catas.c | 4 -
drivers/net/ethernet/mellanox/mlx4/cmd.c | 13 --
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 1 -
drivers/net/ethernet/myricom/myri10ge/myri10ge.c | 2 -
drivers/net/ethernet/neterion/s2io.c | 2 -
drivers/net/ethernet/neterion/vxge/vxge-main.c | 5 -
drivers/net/ethernet/neterion/vxge/vxge-traffic.c | 4 -
drivers/net/ethernet/qlogic/qed/qed_int.c | 13 --
drivers/net/ethernet/qlogic/qed/qed_spq.c | 3 -
drivers/net/ethernet/qlogic/qede/qede_ethtool.c | 8 -
drivers/net/ethernet/qlogic/qede/qede_fp.c | 8 -
drivers/net/ethernet/qlogic/qla3xxx.c | 1 -
drivers/net/ethernet/qlogic/qlge/qlge.h | 1 -
drivers/net/ethernet/qlogic/qlge/qlge_main.c | 1 -
drivers/net/ethernet/renesas/ravb_main.c | 9 -
drivers/net/ethernet/renesas/ravb_ptp.c | 3 -
drivers/net/ethernet/renesas/sh_eth.c | 1 -
drivers/net/ethernet/sfc/falcon/io.h | 2 -
drivers/net/ethernet/sfc/io.h | 2 -
drivers/net/ethernet/silan/sc92031.c | 15 --
drivers/net/ethernet/via/via-rhine.c | 3 -
drivers/net/ethernet/wiznet/w5100.c | 6 -
drivers/net/ethernet/wiznet/w5300.c | 15 --
drivers/net/wireless/ath/ath5k/base.c | 4 -
drivers/net/wireless/ath/ath5k/mac80211-ops.c | 2 -
drivers/net/wireless/broadcom/b43/main.c | 7 -
drivers/net/wireless/broadcom/b43/sysfs.c | 1 -
drivers/net/wireless/broadcom/b43legacy/ilt.c | 2 -
drivers/net/wireless/broadcom/b43legacy/main.c | 20 --
drivers/net/wireless/broadcom/b43legacy/phy.c | 1 -
drivers/net/wireless/broadcom/b43legacy/pio.h | 1 -
drivers/net/wireless/broadcom/b43legacy/radio.c | 4 -
drivers/net/wireless/broadcom/b43legacy/sysfs.c | 1 -
drivers/net/wireless/intel/iwlegacy/common.h | 7 -
drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 1 -
drivers/ntb/hw/idt/ntb_hw_idt.c | 7 -
drivers/ntb/test/ntb_perf.c | 3 -
drivers/scsi/bfa/bfa.h | 3 +-
drivers/scsi/bfa/bfa_hw_cb.c | 2 -
drivers/scsi/bfa/bfa_hw_ct.c | 2 -
drivers/scsi/bnx2fc/bnx2fc_hwi.c | 2 -
drivers/scsi/bnx2i/bnx2i_hwi.c | 3 -
drivers/scsi/megaraid/megaraid_sas_base.c | 1 -
drivers/scsi/megaraid/megaraid_sas_fusion.c | 1 -
drivers/scsi/mpt3sas/mpt3sas_base.c | 1 -
drivers/scsi/qedf/qedf_io.c | 1 -
drivers/scsi/qedi/qedi_fw.c | 1 -
drivers/scsi/qla1280.c | 15 --
drivers/ssb/pci.c | 1 -
drivers/ssb/pcmcia.c | 4 -
drivers/staging/comedi/drivers/mite.c | 3 -
drivers/staging/comedi/drivers/ni_660x.c | 2 -
drivers/staging/comedi/drivers/ni_mio_common.c | 1 -
drivers/staging/comedi/drivers/ni_pcidio.c | 2 -
drivers/staging/comedi/drivers/ni_tio.c | 1 -
drivers/staging/comedi/drivers/s626.c | 2 -
drivers/tty/serial/men_z135_uart.c | 1 -
drivers/tty/serial/serial_txx9.c | 1 -
drivers/usb/early/xhci-dbc.c | 4 -
drivers/usb/host/xhci-dbgcap.c | 2 -
include/asm-generic/io.h | 7 +-
include/asm-generic/mmiowb.h | 63 ++++++
include/asm-generic/mmiowb_types.h | 12 +
include/linux/qed/qed_if.h | 2 -
include/linux/spinlock.h | 11 +-
kernel/Kconfig.locks | 7 +
kernel/locking/spinlock.c | 7 +
kernel/locking/spinlock_debug.c | 6 +-
sound/soc/txx9/txx9aclc-ac97.c | 1 -
181 files changed, 343 insertions(+), 828 deletions(-)
create mode 100644 arch/ia64/include/asm/mmiowb.h
create mode 100644 arch/mips/include/asm/mmiowb.h
create mode 100644 arch/powerpc/include/asm/mmiowb.h
create mode 100644 arch/riscv/include/asm/mmiowb.h
create mode 100644 arch/sh/include/asm/mmiowb.h
create mode 100644 include/asm-generic/mmiowb.h
create mode 100644 include/asm-generic/mmiowb_types.h

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