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Re: [Qemu-devel] [PATCH v2 20/29] Include qemu/main-loop.h less


From: Philippe Mathieu-Daudé
Subject: Re: [Qemu-devel] [PATCH v2 20/29] Include qemu/main-loop.h less
Date: Wed, 7 Aug 2019 15:18:20 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

On 8/6/19 5:14 PM, Markus Armbruster wrote:
> In my "build everything" tree, changing qemu/main-loop.h triggers a
> recompile of some 5600 out of 6600 objects (not counting tests and
> objects that don't depend on qemu/osdep.h).  It includes block/aio.h,
> which in turn includes qemu/event_notifier.h, qemu/notify.h,
> qemu/processor.h, qemu/qsp.h, qemu/queue.h, qemu/thread-posix.h,
> qemu/thread.h, qemu/timer.h, and a few more.
> 
> Include qemu/main-loop.h only where it's needed.  Touching it now
> recompiles only some 1700 objects.  For block/aio.h and
> qemu/event_notifier.h, these numbers drop from 5600 to 2800.  For the
> others, they shrink only slightly.
> 
> Signed-off-by: Markus Armbruster <address@hidden>
> ---
>  accel/kvm/kvm-all.c             | 1 +
>  block.c                         | 1 +
>  block/block-backend.c           | 1 +
>  block/create.c                  | 1 +
>  block/io.c                      | 1 +
>  block/nbd.c                     | 1 +
>  block/nfs.c                     | 1 +
>  block/nvme.c                    | 1 +
>  block/qcow2.c                   | 1 +
>  block/qed.c                     | 1 +
>  block/sheepdog.c                | 1 +
>  block/throttle-groups.c         | 1 +
>  blockdev.c                      | 1 +
>  blockjob.c                      | 1 +
>  chardev/baum.c                  | 1 +
>  chardev/char-pipe.c             | 1 +
>  chardev/char-win-stdio.c        | 1 +
>  chardev/char-win.c              | 1 +
>  dump/dump.c                     | 1 +
>  fsdev/qemu-fsdev-throttle.c     | 1 +
>  fsdev/qemu-fsdev-throttle.h     | 1 -
>  hw/9pfs/9p.c                    | 1 +
>  hw/9pfs/codir.c                 | 1 +
>  hw/9pfs/cofile.c                | 1 +
>  hw/9pfs/cofs.c                  | 1 +
>  hw/9pfs/coth.c                  | 1 +
>  hw/9pfs/coth.h                  | 1 -
>  hw/9pfs/coxattr.c               | 1 +
>  hw/9pfs/xen-9p-backend.c        | 1 +
>  hw/arm/omap1.c                  | 1 +
>  hw/block/dataplane/virtio-blk.c | 1 +
>  hw/block/dataplane/xen-block.c  | 1 +
>  hw/block/fdc.c                  | 1 +
>  hw/block/xen-block.c            | 1 +
>  hw/char/virtio-serial-bus.c     | 1 +
>  hw/core/machine-qmp-cmds.c      | 1 +
>  hw/display/qxl.c                | 1 +
>  hw/dma/etraxfs_dma.c            | 1 +
>  hw/i386/intel_iommu.c           | 1 +
>  hw/i386/xen/xen-hvm.c           | 1 +
>  hw/ide/ahci.c                   | 1 +
>  hw/ide/core.c                   | 1 +
>  hw/ide/qdev.c                   | 1 +
>  hw/intc/s390_flic.c             | 1 +
>  hw/m68k/mcf5206.c               | 1 +
>  hw/m68k/mcf5208.c               | 1 +
>  hw/misc/imx6_src.c              | 1 +
>  hw/net/fsl_etsec/etsec.c        | 1 +
>  hw/net/lan9118.c                | 1 +
>  hw/net/vhost_net.c              | 2 +-
>  hw/net/virtio-net.c             | 1 +
>  hw/ppc/ppc.c                    | 1 +
>  hw/ppc/ppc440_uc.c              | 1 +
>  hw/ppc/spapr_hcall.c            | 1 +
>  hw/ppc/spapr_rng.c              | 1 +
>  hw/scsi/mptsas.c                | 1 +
>  hw/scsi/scsi-disk.c             | 1 +
>  hw/scsi/vmw_pvscsi.c            | 1 +
>  hw/timer/allwinner-a10-pit.c    | 1 +
>  hw/timer/altera_timer.c         | 1 +
>  hw/timer/etraxfs_timer.c        | 1 +
>  hw/timer/exynos4210_rtc.c       | 1 +
>  hw/timer/milkymist-sysctl.c     | 1 +
>  hw/usb/dev-uas.c                | 1 +
>  hw/usb/hcd-ehci.c               | 1 +
>  hw/usb/host-libusb.c            | 1 +
>  hw/usb/xen-usb.c                | 1 +
>  hw/vfio/ccw.c                   | 1 +
>  hw/vfio/common.c                | 1 +
>  hw/vfio/pci.c                   | 1 +
>  hw/vfio/platform.c              | 1 +
>  hw/virtio/vhost-backend.c       | 1 +
>  hw/virtio/vhost-user.c          | 1 +
>  hw/virtio/virtio-crypto.c       | 1 +
>  hw/virtio/virtio-pmem.c         | 1 +
>  hw/virtio/virtio.c              | 1 +
>  hw/xen/xen-legacy-backend.c     | 1 +
>  hw/xen/xen_pvdev.c              | 1 +
>  include/block/block_int.h       | 1 -
>  include/chardev/char-fe.h       | 1 +
>  include/chardev/char-io.h       | 1 +
>  include/chardev/char.h          | 2 +-
>  include/hw/scsi/scsi.h          | 1 +
>  include/sysemu/sysemu.h         | 1 -
>  memory.c                        | 1 +
>  migration/block.c               | 1 +
>  migration/colo.c                | 1 +
>  migration/migration.c           | 1 +
>  migration/savevm.c              | 1 +
>  nbd/nbd-internal.h              | 1 -
>  net/can/can_socketcan.c         | 1 +
>  net/tap-win32.c                 | 1 +
>  net/tap.c                       | 1 +
>  qemu-img.c                      | 1 +
>  qom/cpu.c                       | 1 +
>  replay/replay-internal.c        | 1 +
>  target/arm/helper-a64.c         | 1 +
>  target/arm/helper.c             | 2 ++
>  target/arm/kvm.c                | 1 +
>  target/arm/kvm64.c              | 1 +
>  target/arm/m_helper.c           | 2 ++
>  target/arm/psci.c               | 2 ++
>  target/i386/kvm.c               | 1 +
>  target/lm32/op_helper.c         | 1 +
>  target/mips/kvm.c               | 1 +
>  target/ppc/int_helper.c         | 2 ++
>  target/ppc/kvm.c                | 1 +
>  target/ppc/machine.c            | 1 +
>  target/ppc/mem_helper.c         | 2 ++
>  target/ppc/misc_helper.c        | 2 ++
>  target/ppc/mmu_helper.c         | 2 ++
>  target/ppc/translate.c          | 1 +
>  target/s390x/kvm.c              | 1 +
>  tcg/tcg-op-gvec.c               | 1 +
>  tests/test-bdrv-drain.c         | 1 +
>  tests/test-bdrv-graph-mod.c     | 1 +
>  tests/test-block-backend.c      | 1 +
>  tests/test-block-iothread.c     | 1 +
>  tests/test-image-locking.c      | 1 +
>  tests/test-replication.c        | 1 +
>  tests/test-throttle.c           | 1 +
>  ui/input-linux.c                | 1 +
>  ui/spice-core.c                 | 1 +
>  ui/spice-display.c              | 1 +
>  ui/vnc-auth-sasl.h              | 1 -
>  ui/vnc.c                        | 1 +
>  util/oslib-posix.c              | 1 +
>  127 files changed, 128 insertions(+), 8 deletions(-)
> 
[...]
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 77f5df59b0..ac18a1184a 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -5,7 +5,6 @@
>  #include "qapi/qapi-types-run-state.h"
>  #include "qemu/timer.h"
>  #include "qemu/notify.h"
> -#include "qemu/main-loop.h"
>  #include "qemu/bitmap.h"
>  #include "qemu/uuid.h"
>  #include "qom/object.h"
[...]

You missed to adapt ui/cocoa.m, building fails on OSX:

  OBJC    ui/cocoa.o
ui/cocoa.m:141:19: warning: implicit declaration of function
'qemu_mutex_iothread_locked' is invalid in C99
[-Wimplicit-function-declaration]
    bool locked = qemu_mutex_iothread_locked();
                  ^
ui/cocoa.m:141:19: warning: this function declaration is not a prototype
[-Wstrict-prototypes]
ui/cocoa.m:143:9: warning: implicit declaration of function
'qemu_mutex_lock_iothread' is invalid in C99
[-Wimplicit-function-declaration]
        qemu_mutex_lock_iothread();
        ^
ui/cocoa.m:143:9: warning: this function declaration is not a prototype
[-Wstrict-prototypes]
ui/cocoa.m:147:9: warning: implicit declaration of function
'qemu_mutex_unlock_iothread' is invalid in C99
[-Wimplicit-function-declaration]
        qemu_mutex_unlock_iothread();
        ^
ui/cocoa.m:147:9: warning: this function declaration is not a prototype
[-Wstrict-prototypes]
ui/cocoa.m:153:19: warning: implicit declaration of function
'qemu_mutex_iothread_locked' is invalid in C99
[-Wimplicit-function-declaration]
    bool locked = qemu_mutex_iothread_locked();
                  ^
ui/cocoa.m:157:9: warning: implicit declaration of function
'qemu_mutex_lock_iothread' is invalid in C99
[-Wimplicit-function-declaration]
        qemu_mutex_lock_iothread();
        ^
ui/cocoa.m:161:9: warning: implicit declaration of function
'qemu_mutex_unlock_iothread' is invalid in C99
[-Wimplicit-function-declaration]
        qemu_mutex_unlock_iothread();
        ^



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