Juergen Gross 81990ac1d1 xen/gntdev: remove struct gntdev_copy_batch from stack ...

[ Upstream commit 70045cf659 ]

When compiling the kernel with LLVM, the following warning was issued:

  drivers/xen/gntdev.c:991: warning: stack frame size (1160) exceeds
  limit (1024) in function 'gntdev_ioctl'

The main reason is struct gntdev_copy_batch which is located on the
stack and has a size of nearly 1kb.

For performance reasons it shouldn't by just dynamically allocated
instead, so allocate a new instance when needed and instead of freeing
it put it into a list of free structs anchored in struct gntdev_priv.

Fixes: a4cdb556ca ("xen/gntdev: add ioctl for grant copy")
Reported-by: Abinash Singh <abinashsinghlalotra@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <20250703073259.17356-1-jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-08-15 12:13:43 +02:00

..

events

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xen-pciback

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xenbus

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xenfs

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acpi.c

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arm-device.c

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balloon.c

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biomerge.c

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cpu_hotplug.c

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dbgp.c

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efi.c

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evtchn.c

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features.c

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gntalloc.c

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gntdev-common.h

xen/gntdev: remove struct gntdev_copy_batch from stack

2025-08-15 12:13:43 +02:00

gntdev-dmabuf.c

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gntdev-dmabuf.h

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gntdev.c

xen/gntdev: remove struct gntdev_copy_batch from stack

2025-08-15 12:13:43 +02:00

grant-dma-iommu.c

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grant-dma-ops.c

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grant-table.c

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Kconfig

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Makefile

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manage.c

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mcelog.c

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mem-reservation.c

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pci.c

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pcpu.c

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platform-pci.c

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privcmd-buf.c

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privcmd.c

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privcmd.h

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pvcalls-back.c

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pvcalls-front.c

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pvcalls-front.h

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swiotlb-xen.c

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sys-hypervisor.c

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time.c

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unpopulated-alloc.c

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xen-acpi-pad.c

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xen-acpi-processor.c

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xen-balloon.c

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xen-front-pgdir-shbuf.c

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xen-scsiback.c

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xlate_mmu.c

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