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linux/include/uapi
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Boris Brezillon 66d64d42d2 drm/panthor: Add missing explicit padding in drm_panthor_gpu_info 
[ Upstream commit 95cbab4878 ]

drm_panthor_gpu_info::shader_present is currently automatically offset
by 4 byte to meet Arm's 32-bit/64-bit field alignment rules, but those
constraints don't stand on 32-bit x86 and cause a mismatch when running
an x86 binary in a user emulated environment like FEX. It's also
generally agreed that uAPIs should explicitly pad their struct fields,
which we originally intended to do, but a mistake slipped through during
the submission process, leading drm_panthor_gpu_info::shader_present to
be misaligned.

This uAPI change doesn't break any of the existing users of panthor
which are either arm32 or arm64 where the 64-bit alignment of
u64 fields is already enforced a the compiler level.

Changes in v2:
- Rename the garbage field into pad0 and adjust the comment accordingly
- Add Liviu's A-b

Changes in v3:
- Add R-bs

Fixes: 0f25e493a2 ("drm/panthor: Add uAPI")
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20250606080932.4140010-2-boris.brezillon@collabora.com
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-08-15 12:13:39 +02:00
..
asm-generic net: add SO_DEVMEM_DONTNEED setsockopt to release RX frags 2024-09-11 20:44:32 -07:00
drm drm/panthor: Add missing explicit padding in drm_panthor_gpu_info 2025-08-15 12:13:39 +02:00
linux vsock/uapi: fix linux/vm_sockets.h userspace compilation errors 2025-07-06 11:01:40 +02:00
misc Revert "misc: fastrpc: Restrict untrusted app to attach to privileged PD" 2024-08-15 16:59:14 +02:00
mtd ubi: fastmap: Add control in 'UBI_IOCATT' ioctl to reserve PEBs for filling pools 2023-10-28 23:16:00 +02:00
rdma RDMA/nldev: Expose whether RDMA monitoring is supported 2024-09-13 08:29:34 +03:00
regulator uapi: regulator: Fix typo 2024-01-04 13:22:24 +00:00
scsi scsi: mpi3mr: Add ioctl support for HDB 2024-06-26 23:30:09 -04:00
sound ASoC: topology: Bump minimal topology ABI version 2024-10-10 12:15:03 +01:00
video License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
xen xen/privcmd: Add new syscall to get gsi from dev 2024-09-25 09:54:55 +02:00
Kbuild kbuild: re-implement Makefile.headersinst without recursion 2019-06-15 19:57:02 +09:00