netdev - Re: [PATCH v2 2/4] eventfd: simplify eventfd

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Date: Wed, 22 Nov 2023 22:49:27 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: Christian Brauner <brauner@...nel.org>
Cc: linux-fsdevel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	Jan Kara <jack@...e.cz>, Vitaly Kuznetsov <vkuznets@...hat.com>,
	Sean Christopherson <seanjc@...gle.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	David Woodhouse <dwmw2@...radead.org>, Paul Durrant <paul@....org>,
	Oded Gabbay <ogabbay@...nel.org>, Wu Hao <hao.wu@...el.com>,
	Tom Rix <trix@...hat.com>, Moritz Fischer <mdf@...nel.org>,
	Xu Yilun <yilun.xu@...el.com>,
	Zhenyu Wang <zhenyuw@...ux.intel.com>,
	Zhi Wang <zhi.a.wang@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
	Leon Romanovsky <leon@...nel.org>, Jason Gunthorpe <jgg@...pe.ca>,
	Frederic Barrat <fbarrat@...ux.ibm.com>,
	Andrew Donnellan <ajd@...ux.ibm.com>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Eric Farman <farman@...ux.ibm.com>,
	Matthew Rosato <mjrosato@...ux.ibm.com>,
	Halil Pasic <pasic@...ux.ibm.com>,
	Vineeth Vijayan <vneethv@...ux.ibm.com>,
	Peter Oberparleiter <oberpar@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Tony Krowiak <akrowiak@...ux.ibm.com>,
	Jason Herne <jjherne@...ux.ibm.com>,
	Harald Freudenberger <freude@...ux.ibm.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Diana Craciun <diana.craciun@....nxp.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Eric Auger <eric.auger@...hat.com>, Fei Li <fei1.li@...el.com>,
	Benjamin LaHaise <bcrl@...ck.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeelb@...gle.com>,
	Muchun Song <muchun.song@...ux.dev>,
	Kirti Wankhede <kwankhede@...dia.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-fpga@...r.kernel.org, intel-gvt-dev@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-usb@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-aio@...ck.org, cgroups@...r.kernel.org, linux-mm@...ck.org,
	Jens Axboe <axboe@...nel.dk>,
	Pavel Begunkov <asml.silence@...il.com>, io-uring@...r.kernel.org
Subject: Re: [PATCH v2 2/4] eventfd: simplify eventfd_signal()

On Wed, Nov 22, 2023 at 01:48:23PM +0100, Christian Brauner wrote:
> Ever since the evenfd type was introduced back in 2007 in commit
> e1ad7468c77d ("signal/timer/event: eventfd core") the eventfd_signal()
> function only ever passed 1 as a value for @n. There's no point in
> keeping that additional argument.
> 
> Signed-off-by: Christian Brauner <brauner@...nel.org>
> ---
>  arch/x86/kvm/hyperv.c                     |  2 +-
>  arch/x86/kvm/xen.c                        |  2 +-
>  drivers/accel/habanalabs/common/device.c  |  2 +-
>  drivers/fpga/dfl.c                        |  2 +-
>  drivers/gpu/drm/drm_syncobj.c             |  6 +++---
>  drivers/gpu/drm/i915/gvt/interrupt.c      |  2 +-
>  drivers/infiniband/hw/mlx5/devx.c         |  2 +-
>  drivers/misc/ocxl/file.c                  |  2 +-
>  drivers/s390/cio/vfio_ccw_chp.c           |  2 +-
>  drivers/s390/cio/vfio_ccw_drv.c           |  4 ++--
>  drivers/s390/cio/vfio_ccw_ops.c           |  6 +++---
>  drivers/s390/crypto/vfio_ap_ops.c         |  2 +-
>  drivers/usb/gadget/function/f_fs.c        |  4 ++--
>  drivers/vdpa/vdpa_user/vduse_dev.c        |  6 +++---
>  drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c    |  2 +-
>  drivers/vfio/pci/vfio_pci_core.c          |  6 +++---
>  drivers/vfio/pci/vfio_pci_intrs.c         | 12 ++++++------
>  drivers/vfio/platform/vfio_platform_irq.c |  4 ++--
>  drivers/vhost/vdpa.c                      |  4 ++--
>  drivers/vhost/vhost.c                     | 10 +++++-----
>  drivers/vhost/vhost.h                     |  2 +-
>  drivers/virt/acrn/ioeventfd.c             |  2 +-
>  drivers/xen/privcmd.c                     |  2 +-
>  fs/aio.c                                  |  2 +-
>  fs/eventfd.c                              |  9 +++------
>  include/linux/eventfd.h                   |  4 ++--
>  mm/memcontrol.c                           | 10 +++++-----
>  mm/vmpressure.c                           |  2 +-
>  samples/vfio-mdev/mtty.c                  |  4 ++--
>  virt/kvm/eventfd.c                        |  4 ++--
>  30 files changed, 60 insertions(+), 63 deletions(-)
> 
> diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
> index dd7a783d53b5..e73f88050f08 100644
> --- a/drivers/fpga/dfl.c
> +++ b/drivers/fpga/dfl.c
> @@ -1872,7 +1872,7 @@ static irqreturn_t dfl_irq_handler(int irq, void *arg)
>  {
>  	struct eventfd_ctx *trigger = arg;
>  
> -	eventfd_signal(trigger, 1);
> +	eventfd_signal(trigger);

For FPGA part,

Acked-by: Xu Yilun <yilun.xu@...el.com>

>  	return IRQ_HANDLED;
>  }