Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix u32/s32 bounds when ranges cross min/max boundary (Eduard
Zingerman)

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix u32/s32 bounds when ranges cross min/max boundary (Eduard
Zingerman)

- Fix precision backtracking with linked registers (Eduard Zingerman)

- Fix linker flags detection for resolve_btfids (Ihor Solodrai)

- Fix race in update_ftrace_direct_add/del (Jiri Olsa)

- Fix UAF in bpf_trampoline_link_cgroup_shim (Lang Xu)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
resolve_btfids: Fix linker flags detection
selftests/bpf: add reproducer for spurious precision propagation through calls
bpf: collect only live registers in linked regs
Revert "selftests/bpf: Update reg_bound range refinement logic"
selftests/bpf: test refining u32/s32 bounds when ranges cross min/max boundary
bpf: Fix u32/s32 bounds when ranges cross min/max boundary
bpf: Fix a UAF issue in bpf_trampoline_link_cgroup_shim
ftrace: Add missing ftrace_lock to update_ftrace_direct_add/del

show more ...

resolve_btfids: Fix linker flags detection

The "|| echo -lzstd" default makes zstd an unconditional link
dependency of resolve_btfids. On systems where libzstd-dev is not
installed and pkg-config fa

resolve_btfids: Fix linker flags detection

The "|| echo -lzstd" default makes zstd an unconditional link
dependency of resolve_btfids. On systems where libzstd-dev is not
installed and pkg-config fails, the linker fails:

ld: cannot find -lzstd: No such file or directory

libzstd is a transitive dependency of libelf, so the -lzstd flag is
strictly necessary only for static builds [1].

Remove ZSTD_LIBS variable, and instead set LIBELF_LIBS depending on
whether the build is static or not. Use $(HOSTPKG_CONFIG) as primary
source of the flags list.

Also add a default value for HOSTPKG_CONFIG in case it's not built via
the toplevel Makefile. Pass it from selftests/bpf too.

[1] https://lore.kernel.org/bpf/4ff82800-2daa-4b9f-95a9-6f512859ee70@linux.dev/

Reported-by: BPF CI Bot (Claude Opus 4.6) <bot+bpf-ci@kernel.org>
Reported-by: Vitaly Chikunov <vt@altlinux.org>
Closes: https://lore.kernel.org/bpf/aaWqMcK-2AQw5dx8@altlinux.org/
Fixes: 4021848a903e ("selftests/bpf: Pass through build flags to bpftool and resolve_btfids")
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Reviewed-by: Paul Chaignon <paul.chaignon@gmail.com>
Link: https://lore.kernel.org/r/20260305014730.3123382-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

Merge tag 'asoc-fix-v7.0-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v7.0

A moderately large pile of fixes, though none of them are super m

Merge tag 'asoc-fix-v7.0-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v7.0

A moderately large pile of fixes, though none of them are super major,
plus a few new quirks and device IDs.

show more ...

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix alignment of arm64 JIT buffer to prevent atomic tearing (Fuad
Tabba)

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Pull bpf fixes from Alexei Starovoitov:

- Fix alignment of arm64 JIT buffer to prevent atomic tearing (Fuad
Tabba)

- Fix invariant violation for single value tnums in the verifier
(Harishankar Vishwanathan, Paul Chaignon)

- Fix a bunch of issues found by ASAN in selftests/bpf (Ihor Solodrai)

- Fix race in devmpa and cpumap on PREEMPT_RT (Jiayuan Chen)

- Fix show_fdinfo of kprobe_multi when cookies are not present (Jiri
Olsa)

- Fix race in freeing special fields in BPF maps to prevent memory
leaks (Kumar Kartikeya Dwivedi)

- Fix OOB read in dmabuf_collector (T.J. Mercier)

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (36 commits)
selftests/bpf: Avoid simplification of crafted bounds test
selftests/bpf: Test refinement of single-value tnum
bpf: Improve bounds when tnum has a single possible value
bpf: Introduce tnum_step to step through tnum's members
bpf: Fix race in devmap on PREEMPT_RT
bpf: Fix race in cpumap on PREEMPT_RT
selftests/bpf: Add tests for special fields races
bpf: Retire rcu_trace_implies_rcu_gp() from local storage
bpf: Delay freeing fields in local storage
bpf: Lose const-ness of map in map_check_btf()
bpf: Register dtor for freeing special fields
selftests/bpf: Fix OOB read in dmabuf_collector
selftests/bpf: Fix a memory leak in xdp_flowtable test
bpf: Fix stack-out-of-bounds write in devmap
bpf: Fix kprobe_multi cookies access in show_fdinfo callback
bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
selftests/bpf: Don't override SIGSEGV handler with ASAN
selftests/bpf: Check BPFTOOL env var in detect_bpftool_path()
selftests/bpf: Fix out-of-bounds array access bugs reported by ASAN
selftests/bpf: Fix array bounds warning in jit_disasm_helpers
...

show more ...

Merge branch 'selftests-bpf-fixes-for-userspace-asan'

Ihor Solodrai says:

====================
selftests/bpf: Fixes for userspace ASAN

This series includes various fixes aiming to enable test_prog

Merge branch 'selftests-bpf-fixes-for-userspace-asan'

Ihor Solodrai says:

====================
selftests/bpf: Fixes for userspace ASAN

This series includes various fixes aiming to enable test_progs run
with userspace address sanitizer on BPF CI.

The first five patches add a simplified implementation of strscpy() to
selftests/bpf and then replace strcpy/strncpy usages across the tests
with it. See relevant discussions [1][2].

Patch #6 fixes the selftests/bpf/test_progs build with:

SAN_CFLAGS="-fsanitize=address -fno-omit-frame-pointer"

The subsequent patches fix bugs reported by the address sanitizer on
attempt to run the tests.

[1] https://lore.kernel.org/bpf/CAADnVQ+9uw2_o388j43EWiAPdMB=3FLx2jq-9zRSvqrv-wgRag@mail.gmail.com/
[2] https://lore.kernel.org/bpf/20260220182011.802116-1-ihor.solodrai@linux.dev/
---

v3->v4:
- combine strscpy and ASAN series into one (Alexei)
- make the count arg of strscpy() optional via macro and fixup
relevant call sites (Alexei)
- remove strscpy_cat() from this series (Alexei)

v3: https://lore.kernel.org/bpf/20260220222604.1155148-1-ihor.solodrai@linux.dev/

v2->v3:
- rebase on top of "selftests/bpf: Add and use strscpy()"
- https://lore.kernel.org/bpf/20260220182011.802116-1-ihor.solodrai@linux.dev/
- uprobe_multi_test.c: memset static struct child at the beginning
of a test *and* zero out child->thread in release_child (patch #9,
Mykyta)
- nits in test_sysctl.c (patch #11, Eduard)
- bpftool_helpers.c: update to use strscpy (patch #14, Alexei)
- add __asan_on_error handler to still dump test logs even with ASAN
build (patch #15, Mykyta)

v2: https://lore.kernel.org/bpf/20260218003041.1156774-1-ihor.solodrai@linux.dev/

v1->v2:
- rebase on bpf (v1 was targeting bpf-next)
- add ASAN flag handling in selftests/bpf/Makefile (Eduard)
- don't override SIGSEGV handler in test_progs with ASAN (Eduard)
- add error messages in detect_bpftool_path (Mykyta)
- various nits (Eduard, Jiri, Mykyta, Alexis)

v1: https://lore.kernel.org/bpf/20260212011356.3266753-1-ihor.solodrai@linux.dev/
====================

Link: https://patch.msgid.link/20260223190736.649171-1-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

selftests/bpf: Pass through build flags to bpftool and resolve_btfids

EXTRA_* and SAN_* build flags were not correctly propagated to bpftool
and resolve_btids when building selftests/bpf. This led t

selftests/bpf: Pass through build flags to bpftool and resolve_btfids

EXTRA_* and SAN_* build flags were not correctly propagated to bpftool
and resolve_btids when building selftests/bpf. This led to various
build errors on attempt to build with SAN_CFLAGS="-fsanitize=address",
for example.

Fix the makefiles to address this:
- Pass SAN_CFLAGS/SAN_LDFLAGS to bpftool and resolve_btfids build
- Propagate EXTRA_LDFLAGS to resolve_btfids link command
- Use pkg-config to detect zlib and zstd for resolve_btfids, similar
libelf handling

Also check for ASAN flag in selftests/bpf/Makefile for convenience.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260223190736.649171-7-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

show more ...

Merge drm/drm-fixes into drm-misc-fixes

7.0-rc1 was just released, let's merge it to kick the new release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Support associating BPF program with struct_ops (Amery Hung)

-

Merge tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

- Support associating BPF program with struct_ops (Amery Hung)

- Switch BPF local storage to rqspinlock and remove recursion detection
counters which were causing false positives (Amery Hung)

- Fix live registers marking for indirect jumps (Anton Protopopov)

- Introduce execution context detection BPF helpers (Changwoo Min)

- Improve verifier precision for 32bit sign extension pattern
(Cupertino Miranda)

- Optimize BTF type lookup by sorting vmlinux BTF and doing binary
search (Donglin Peng)

- Allow states pruning for misc/invalid slots in iterator loops (Eduard
Zingerman)

- In preparation for ASAN support in BPF arenas teach libbpf to move
global BPF variables to the end of the region and enable arena kfuncs
while holding locks (Emil Tsalapatis)

- Introduce support for implicit arguments in kfuncs and migrate a
number of them to new API. This is a prerequisite for cgroup
sub-schedulers in sched-ext (Ihor Solodrai)

- Fix incorrect copied_seq calculation in sockmap (Jiayuan Chen)

- Fix ORC stack unwind from kprobe_multi (Jiri Olsa)

- Speed up fentry attach by using single ftrace direct ops in BPF
trampolines (Jiri Olsa)

- Require frozen map for calculating map hash (KP Singh)

- Fix lock entry creation in TAS fallback in rqspinlock (Kumar
Kartikeya Dwivedi)

- Allow user space to select cpu in lookup/update operations on per-cpu
array and hash maps (Leon Hwang)

- Make kfuncs return trusted pointers by default (Matt Bobrowski)

- Introduce "fsession" support where single BPF program is executed
upon entry and exit from traced kernel function (Menglong Dong)

- Allow bpf_timer and bpf_wq use in all programs types (Mykyta
Yatsenko, Andrii Nakryiko, Kumar Kartikeya Dwivedi, Alexei
Starovoitov)

- Make KF_TRUSTED_ARGS the default for all kfuncs and clean up their
definition across the tree (Puranjay Mohan)

- Allow BPF arena calls from non-sleepable context (Puranjay Mohan)

- Improve register id comparison logic in the verifier and extend
linked registers with negative offsets (Puranjay Mohan)

- In preparation for BPF-OOM introduce kfuncs to access memcg events
(Roman Gushchin)

- Use CFI compatible destructor kfunc type (Sami Tolvanen)

- Add bitwise tracking for BPF_END in the verifier (Tianci Cao)

- Add range tracking for BPF_DIV and BPF_MOD in the verifier (Yazhou
Tang)

- Make BPF selftests work with 64k page size (Yonghong Song)

* tag 'bpf-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (268 commits)
selftests/bpf: Fix outdated test on storage->smap
selftests/bpf: Choose another percpu variable in bpf for btf_dump test
selftests/bpf: Remove test_task_storage_map_stress_lookup
selftests/bpf: Update task_local_storage/task_storage_nodeadlock test
selftests/bpf: Update task_local_storage/recursion test
selftests/bpf: Update sk_storage_omem_uncharge test
bpf: Switch to bpf_selem_unlink_nofail in bpf_local_storage_{map_free, destroy}
bpf: Support lockless unlink when freeing map or local storage
bpf: Prepare for bpf_selem_unlink_nofail()
bpf: Remove unused percpu counter from bpf_local_storage_map_free
bpf: Remove cgroup local storage percpu counter
bpf: Remove task local storage percpu counter
bpf: Change local_storage->lock and b->lock to rqspinlock
bpf: Convert bpf_selem_unlink to failable
bpf: Convert bpf_selem_link_map to failable
bpf: Convert bpf_selem_unlink_map to failable
bpf: Select bpf_local_storage_map_bucket based on bpf_local_storage
selftests/xsk: fix number of Tx frags in invalid packet
selftests/xsk: properly handle batch ending in the middle of a packet
bpf: Prevent reentrance into call_rcu_tasks_trace()
...

show more ...

Merge branch 'resolve_btfids-support-for-btf-modifications'

Ihor Solodrai says:

====================
resolve_btfids: Support for BTF modifications

This series changes resolve_btfids and kernel bui

Merge branch 'resolve_btfids-support-for-btf-modifications'

Ihor Solodrai says:

====================
resolve_btfids: Support for BTF modifications

This series changes resolve_btfids and kernel build scripts to enable
BTF transformations in resolve_btfids. Main motivation for enhancing
resolve_btfids is to reduce dependency of the kernel build on pahole
capabilities [1] and enable BTF features and optimizations [2][3]
particular to the kernel.

Patches #1-#4 in the series are non-functional changes in
resolve_btfids.

Patch #5 makes kernel build notice pahole version changes between
builds.

Patch #6 changes minimum version of pahole required for
CONFIG_DEBUG_INFO_BTF to v1.22

Patch #7 makes a small prep change in selftests/bpf build.

The last patch (#8) makes significant changes in resolve_btfids and
introduces scripts/gen-btf.sh. See implementation details in the patch
description.

Successful BPF CI run: https://github.com/kernel-patches/bpf/actions/runs/20378061470

[1] https://lore.kernel.org/dwarves/ba1650aa-fafd-49a8-bea4-bdddee7c38c9@linux.dev/
[2] https://lore.kernel.org/bpf/20251029190113.3323406-1-ihor.solodrai@linux.dev/
[3] https://lore.kernel.org/bpf/20251119031531.1817099-1-dolinux.peng@gmail.com/
---

v6->v7:
- documentation edits in patches #5 and #6 (Nicolas)

v6: https://lore.kernel.org/bpf/20251219020006.785065-1-ihor.solodrai@linux.dev/

v5->v6:
- patch #8: fix double free when btf__distill_base fails (reported by AI)
https://lore.kernel.org/bpf/e269870b8db409800045ee0061fc02d21721e0efadd99ca83960b48f8db7b3f3@mail.kernel.org/

v5: https://lore.kernel.org/bpf/20251219003147.587098-1-ihor.solodrai@linux.dev/

v4->v5:
- patch #3: fix an off-by-one bug (reported by AI)
https://lore.kernel.org/bpf/106b6e71bce75b8f12a85f2f99e75129e67af7287f6d81fa912589ece14044f9@mail.kernel.org/
- patch #8: cleanup GEN_BTF in Makefile.btf

v4: https://lore.kernel.org/bpf/20251218003314.260269-1-ihor.solodrai@linux.dev/

v3->v4:
- add patch #4: "resolve_btfids: Always build with -Wall -Werror"
- add patch #5: "kbuild: Sync kconfig when PAHOLE_VERSION changes" (Alan)
- fix clang cross-compilation (LKP)
https://lore.kernel.org/bpf/cecb6351-ea9a-4f8a-863a-82c9ef02f012@linux.dev/
- remove GEN_BTF env variable (Andrii)
- nits and cleanup in resolve_btfids/main.c (Andrii, Eduard)
- nits in a patch bumping minimum pahole version (Andrii, AI)

v3: https://lore.kernel.org/bpf/20251205223046.4155870-1-ihor.solodrai@linux.dev/

v2->v3:
- add patch #4 bumping minimum pahole version (Andrii, Alan)
- add patch #5 pre-fixing resolve_btfids test (Donglin)
- add GEN_BTF var and assemble RESOLVE_BTFIDS_FLAGS in Makefile.btf (Alan)
- implement --distill_base flag in resolve_btfids, set it depending
on KBUILD_EXTMOD in Makefile.btf (Eduard)
- various implementation nits, see the v2 thread for details (Andrii, Eduard)

v2: https://lore.kernel.org/bpf/20251127185242.3954132-1-ihor.solodrai@linux.dev/

v1->v2:
- gen-btf.sh and other shell script fixes (Donglin)
- update selftests build (Donglin)
- generate .BTF.base only when KBUILD_EXTMOD is set (Alan)
- proper endianness handling for cross-compilation
- change elf_begin mode from ELF_C_RDWR_MMAP to ELF_C_READ_MMAP_PRIVATE
- remove compressed_section_fix()
- nit NULL check in patch #3 (suggested by AI)

v1: https://lore.kernel.org/bpf/20251126012656.3546071-1-ihor.solodrai@linux.dev/
====================

Link: https://patch.msgid.link/20251219181321.1283664-1-ihor.solodrai@linux.dev
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

show more ...

resolve_btfids: Always build with -Wall -Werror

resolve_btfids builds without compiler warnings currently, so let's
enforce this for future changes with '-Wall -Werror' flags [1].

[1] https://lore.

resolve_btfids: Always build with -Wall -Werror

resolve_btfids builds without compiler warnings currently, so let's
enforce this for future changes with '-Wall -Werror' flags [1].

[1] https://lore.kernel.org/bpf/1957a60b-6c45-42a7-b525-a6e335a735ff@linux.dev/

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/bpf/20251219181321.1283664-5-ihor.solodrai@linux.dev

show more ...

Merge drm/drm-next into drm-intel-gt-next

Backmerge in order to get the commit:

048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")

To drm-intel-gt-next as there are f

Merge drm/drm-next into drm-intel-gt-next

Backmerge in order to get the commit:

048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")

To drm-intel-gt-next as there are followup fixes to be applied.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...

Merge commit 'linus' into core/bugs, to resolve conflicts

Resolve conflicts with this commit that was developed in parallel
during the merge window:

8c8efa93db68 ("x86/bug: Add ARCH_WARN_ASM macro

Merge commit 'linus' into core/bugs, to resolve conflicts

Resolve conflicts with this commit that was developed in parallel
during the merge window:

8c8efa93db68 ("x86/bug: Add ARCH_WARN_ASM macro for BUG/WARN asm code sharing with Rust")

Conflicts:
arch/riscv/include/asm/bug.h
arch/x86/include/asm/bug.h

Signed-off-by: Ingo Molnar <mingo@kernel.org>

show more ...

Merge branch 'next' into for-linus

Prepare input updates for 6.18 merge window.

Merge tag 'v6.17-rc2' into HEAD

Sync up with mainline to bring in changes to include/linux/sprintf.h

Merge branch 'for-6.17/amd-sfh' into for-linus

- add support for operating modes (Basavaraj Natikar)

Merge tag 'pm-runtime-6.17-rc1'

Runtime PM updates related to autosuspend for 6.17

Make several autosuspend functions mark last busy stamp and update
the documentation accordingly (Sakari Ailus).

Merge tag 'pm-runtime-6.17-rc1'

Runtime PM updates related to autosuspend for 6.17

Make several autosuspend functions mark last busy stamp and update
the documentation accordingly (Sakari Ailus).

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

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Merge tag 'v6.16-rc3' into perf-tools-next

To get the fixes in libbpf and perf tools.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Merge tag 'nand/for-6.17' into mtd/next

* Raw NAND changes:

Various controller drivers received minor fixes like DMA mapping checks,
better timing derivations or bitflip statistics.
It has also bee

Merge tag 'nand/for-6.17' into mtd/next

* Raw NAND changes:

Various controller drivers received minor fixes like DMA mapping checks,
better timing derivations or bitflip statistics.
It has also been discovered that some Hynix NAND flashes were not
supporting read-retries, which is not properly supported.

* SPI NAND changes:

In order to support high-speed modes, certain chips need extra
configuration like adding more dummy cycles. This is now possible,
especially on Winbond chips.

Aside from that, Gigadevice gets support for a new chip (GD5F1GM9).

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

show more ...

Merge remote-tracking branch 'drm/drm-next' into drm-misc-next

Pull in drm-intel-next for the updates to drm panic handling.

Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

Merge remote-tracking branch 'drm/drm-next' into msm-next

Back-merge drm-next to (indirectly) get arm-smmu updates for making
stall-on-fault more reliable.

Signed-off-by: Rob Clark <robin.clark@oss

Merge remote-tracking branch 'drm/drm-next' into msm-next

Back-merge drm-next to (indirectly) get arm-smmu updates for making
stall-on-fault more reliable.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

show more ...

Add multiple priorities support to mlx5 RDMA TRANSPORT tables

From Patrisious:

This short series from Patrisious extends mlx5 flow steering logic to
allow creation rule creation with priorities in

Add multiple priorities support to mlx5 RDMA TRANSPORT tables

From Patrisious:

This short series from Patrisious extends mlx5 flow steering logic to
allow creation rule creation with priorities in RDMA TRANSPORT tables.

Thanks

Link: https://lore.kernel.org/all/cover.1750148083.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>

* mlx5-next: (200 commits)
net/mlx5: fs, add multiple prios to RDMA TRANSPORT steering domain
Linux 6.16-rc2
...

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Merge drm/drm-next into drm-xe-next

Catch up on i915 changes to be able to include mtd
driver for both xe and i915.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-intel-next

Sync with drm_panel changes from drm-misc-next, and xe driver changes
from drm-xe-next.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-intel-gt-next

Need to pull in a67221b5eb8d ("drm/i915/dp: Return min bpc supported by source instead of 0")
in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04

Merge drm/drm-next into drm-intel-gt-next

Need to pull in a67221b5eb8d ("drm/i915/dp: Return min bpc supported by source instead of 0")
in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04).

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...

Merge drm/drm-next into drm-intel-next

Backmerge to sync with v6.15-rc, xe, and specifically async flip changes
in drm-misc.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>