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mirror-linux/drivers/gpu/drm
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Linus Torvalds fdcbb1bc06 Merge branch 'nocache-cleanup' 
This series cleans up some of the special user copy functions naming and
semantics.  In particular, get rid of the (very traditional) double
underscore names and behavior: the whole "optimize away the range check"
model has been largely excised from the other user accessors because
it's so subtle and can be unsafe, but also because it's just not a
relevant optimization any more.

To do that, a couple of drivers that misused the "user" copies as kernel
copies in order to get non-temporal stores had to be fixed up, but that
kind of code should never have been allowed anyway.

The x86-only "nocache" version was also renamed to more accurately
reflect what it actually does.

This was all done because I looked at this code due to a report by Jann
Horn, and I just couldn't stand the inconsistent naming, the horrible
semantics, and the random misuse of these functions.  This code should
probably be cleaned up further, but it's at least slightly closer to
normal semantics.

I had a more intrusive series that went even further in trying to
normalize the semantics, but that ended up hitting so many other
inconsistencies between different architectures in this area (eg
'size_t' vs 'unsigned long' vs 'int' as size arguments, and various
iovec check differences that Vasily Gorbik pointed out) that I ended up
with this more limited version that fixed the worst of the issues.

Reported-by: Jann Horn <jannh@google.com>
Tested-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/all/CAHk-=wgg1QVWNWG-UCFo1hx0zqrPnB3qhPzUTrWNft+MtXQXig@mail.gmail.com/

* nocache-cleanup:
  x86-64/arm64/powerpc: clean up and rename __copy_from_user_flushcache
  x86: rename and clean up __copy_from_user_inatomic_nocache()
  x86-64: rename misleadingly named '__copy_user_nocache()' function
 		2026-04-13 08:39:51 -07:00
..
adp
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amd drm/amd/display: Wire up dcn10_dio_construct() for all pre-DCN401 generations 2026-04-02 15:24:13 -04:00
arm Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
armada Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
aspeed
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ast drm/ast: dp501: Fix initialization of SCU2C 2026-03-30 10:38:11 +02:00
atmel-hlcdc Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
bridge drm/bridge: dw-hdmi-qp: fix multi-channel audio output 2026-03-17 18:15:16 +01:00
ci mm.git review status for linus..mm-nonmm-stable 2026-02-12 12:13:01 -08:00
clients Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
display Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
etnaviv Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
exynos Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
fsl-dcu Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
gma500 Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
gud drm/gud: fix NULL crtc dereference on display disable 2026-03-08 20:20:30 +00:00
hisilicon drm/hisilicon/hibmc: Adding reset colorbar cfg in dp init. 2026-01-20 10:53:14 +02:00
hyperv drm/hyperv: Remove reference to hyperv_fb driver 2026-02-14 11:09:38 +01:00
i915 Merge branch 'nocache-cleanup' 2026-04-13 08:39:51 -07:00
imagination drm/imagination: Disable interrupts before suspending the GPU 2026-03-17 14:27:42 +00:00
imx Merge drm/drm-fixes into drm-misc-fixes 2026-02-23 10:09:45 +01:00
ingenic Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
kmb Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
lib
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lima Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
logicvc drm/logicvc: Fix device node reference leak in logicvc_drm_config_parse() 2026-02-10 15:18:36 +01:00
loongson Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mcde
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mediatek drm/mediatek: dsi: Store driver data before invoking mipi_dsi_host_register 2026-03-22 14:15:44 +00:00
meson drm/meson/dw-hdmi: convert to of_drm_find_and_get_bridge() 2026-01-21 13:59:56 +01:00
mgag200 Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
msm Merge tag 'drm-msm-fixes-2026-03-06' of https://gitlab.freedesktop.org/drm/msm into drm-fixes 2026-03-12 14:38:07 +10:00
mxsfb Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
nouveau nouveau/dpcd: return EBUSY for aux xfer if the device is asleep 2026-03-04 22:08:01 +01:00
nova
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omapdrm Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
panel Several fixes for amdxdna around PM handling, error reporting and 2026-02-06 12:52:15 +10:00
panfrost Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
panthor drm/panthor: Correct the order of arguments passed to gem_sync 2026-03-05 16:53:09 +00:00
pl111 Linux 6.19-rc7 2026-01-28 12:44:28 +10:00
qxl Merge branch 'nocache-cleanup' 2026-04-13 08:39:51 -07:00
radeon drm/radeon: apply state adjust rules to some additional HAINAN vairants 2026-03-17 18:04:15 -04:00
renesas drm: renesas: rz-du: mipi_dsi: Set DSI divider 2026-03-02 10:28:38 +00:00
rockchip Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
scheduler drm/sched: Fix kernel-doc warning for drm_sched_job_done() 2026-03-04 10:29:27 +01:00
sitronix drm/sitronix/st7586: fix bad pixel data due to byte swap 2026-03-07 17:14:09 -06:00
solomon drm/solomon: Fix page start when updating rectangle in page addressing mode 2026-02-26 13:42:09 +01:00
sprd
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sti Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
stm
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sun4i Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
sysfb drm/sysfb: Fix efidrm error handling and memory type mismatch 2026-03-31 13:04:51 +02:00
tegra Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tests Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tidss Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tilcdc Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
tiny Merge drm/drm-fixes into drm-misc-fixes 2026-02-23 10:09:45 +01:00
ttm drm/ttm: Fix bo resource use-after-free 2026-03-05 08:12:36 +00:00
tve200
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tyr Driver core changes for 7.0-rc1 2026-02-11 17:43:59 -08:00
udl Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
v3d Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
vboxvideo Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
vc4 drm/vc4: Protect madv read in vc4_gem_object_mmap() with madv_lock 2026-04-02 07:53:23 -03:00
vgem Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
virtio Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
vkms Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
vmwgfx drm/vmwgfx: Don't overwrite KMS surface dirty tracker 2026-03-16 11:39:42 -04:00
xe drm/xe: Fix bug in idledly unit conversion 2026-04-07 16:17:25 -04:00
xen Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
xlnx Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
Kconfig Partly revert "drm/hyperv: Remove reference to hyperv_fb driver" 2026-02-14 14:38:23 -08:00
Kconfig.debug
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Makefile Kbuild/Kconfig updates for 7.0 2026-02-11 13:40:35 -08:00
drm_atomic.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
drm_atomic_helper.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_atomic_state_helper.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_atomic_uapi.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_auth.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_blend.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_bridge.c drm/bridge: Fix refcount shown via debugfs for encoder_bridges_show() 2026-03-26 11:25:03 +01:00
drm_bridge_helper.c
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drm_buddy.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
drm_cache.c
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drm_client.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_client_event.c
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drm_client_modeset.c drm/client: Do not destroy NULL modes 2026-02-25 09:31:54 +02:00
drm_client_sysrq.c
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drm_color_mgmt.c
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drm_colorop.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_connector.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_crtc.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
drm_crtc_helper.c Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
drm_crtc_helper_internal.h
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drm_crtc_internal.h
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drm_damage_helper.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_debugfs.c drm/debug: don't register files for unsupported HDMI InfoFrames 2026-01-19 13:11:47 +02:00
drm_debugfs_crc.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_displayid.c
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drm_displayid_internal.h
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drm_draw.c
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drm_draw_internal.h
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drm_drv.c
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drm_dumb_buffers.c
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drm_edid.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_edid_load.c
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drm_eld.c
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drm_encoder.c
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drm_exec.c
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drm_fb_dma_helper.c
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drm_fb_helper.c Linux 6.19-rc7 2026-01-28 12:44:28 +10:00
drm_fbdev_dma.c
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drm_fbdev_shmem.c
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drm_fbdev_ttm.c
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drm_file.c Revert "drm: Fix use-after-free on framebuffers and property blobs when calling drm_dev_unplug" 2026-03-26 14:09:26 +01:00
drm_flip_work.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
drm_format_helper.c
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drm_format_internal.h
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drm_fourcc.c
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drm_framebuffer.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_gem.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_gem_atomic_helper.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_gem_dma_helper.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_gem_framebuffer_helper.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_gem_shmem_helper.c drm/shmem-helper: Fix huge page mapping in fault handler 2026-03-20 09:15:39 +01:00
drm_gem_ttm_helper.c
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drm_gem_vram_helper.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_gpusvm.c drm/gpusvm: Fix drm_gpusvm_pages_valid_unlocked() kernel-doc 2026-02-24 09:25:36 -08:00
drm_gpuvm.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_internal.h
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drm_ioc32.c drm/ioc32: stop speculation on the drm_compat_ioctl path 2026-04-02 08:24:55 +02:00
drm_ioctl.c
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drm_kms_helper_common.c
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drm_lease.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_managed.c
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drm_mipi_dbi.c
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drm_mipi_dsi.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_mm.c
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drm_mode_config.c Revert "drm: Fix use-after-free on framebuffers and property blobs when calling drm_dev_unplug" 2026-03-26 14:09:26 +01:00
drm_mode_object.c drm/mode_object: add drm_object_immutable_property_get_value() 2026-01-14 02:18:31 +02:00
drm_modes.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_modeset_helper.c
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drm_modeset_lock.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
drm_of.c
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drm_pagemap.c Revert "drm/pagemap: Disable device-to-device migration" 2026-03-04 08:53:37 -05:00
drm_pagemap_util.c drm/pagemap_util: Ensure proper cache lock management on free 2026-03-17 15:39:07 +01:00
drm_panel.c
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drm_panel_backlight_quirks.c
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drm_panel_orientation_quirks.c
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drm_panic.c
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drm_panic_qr.rs
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drm_pci.c
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drm_plane.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_plane_helper.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
drm_prime.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_print.c
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drm_privacy_screen.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_privacy_screen_x86.c
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drm_probe_helper.c
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drm_property.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_rect.c
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drm_self_refresh_helper.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_simple_kms_helper.c
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drm_suballoc.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
drm_syncobj.c drm/syncobj: Fix xa_alloc allocation flags 2026-03-25 08:05:35 +00:00
drm_sysfs.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_trace.h
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drm_trace_points.c
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drm_vblank.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_vblank_helper.c
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drm_vblank_work.c
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drm_vma_manager.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
drm_writeback.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00