3a7e02c...
by
Linus Torvalds <email address hidden>
minmax: avoid overly complicated constant expressions in VM code
The minmax infrastructure is overkill for simple constants, and can
cause huge expansions because those simple constants are then used by
other things.
For example, 'pageblock_order' is a core VM constant, but because it was
implemented using 'min_t()' and all the type-checking that involves, it
actually expanded to something like 2.5kB of preprocessor noise.
And when that simple constant was then used inside other expansions:
the end result was that one statement expanding to 253kB in size.
There are probably other cases of this, but this one case certainly
stood out.
I've added 'MIN_T()' and 'MAX_T()' macros for this kind of "core simple
constant with specific type" use. These macros skip the type checking,
and as such need to be very sparingly used only for obvious cases that
have active issues like this.
e8432ac...
by
Linus Torvalds <email address hidden>
minmax: avoid overly complex min()/max() macro arguments in xen
We have some very fancy min/max macros that have tons of sanity checking
to warn about mixed signedness etc.
This is all things that a sane compiler should warn about, but there are
no sane compiler interfaces for this, and '-Wsign-compare' is broken [1]
and not useful.
So then we compensate (some would say over-compensate) by doing the
checks manually with some truly horrid macro games.
And no, we can't just use __builtin_types_compatible_p(), because the
whole question of "does it make sense to compare these two values" is a
lot more complicated than that.
For example, it makes a ton of sense to compare unsigned values with
simple constants like "5", even if that is indeed a signed type. So we
have these very strange macros to try to make sensible type checking
decisions on the arguments to 'min()' and 'max()'.
But that can cause enormous code expansion if the min()/max() macros are
used with complicated expressions, and particularly if you nest these
things so that you get the first big expansion then expanded again.
The xen setup.c file ended up ballooning to over 50MB of preprocessed
noise that takes 15s to compile (obviously depending on the build host),
largely due to one single line.
So let's split that one single line to just be simpler. I think it ends
up being more legible to humans too at the same time. Now that single
file compiles in under a second.
2f8c4f5...
by
Linus Torvalds <email address hidden>
Merge tag 'auxdisplay-for-v6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull auxdisplay updates from Geert Uytterhoeven:
- add support for configuring the boot message on line displays
- miscellaneous fixes and improvements
* tag 'auxdisplay-for-v6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
auxdisplay: ht16k33: Drop reference after LED registration
auxdisplay: Use sizeof(*pointer) instead of sizeof(type)
auxdisplay: hd44780: add missing MODULE_DESCRIPTION() macro
auxdisplay: linedisp: add missing MODULE_DESCRIPTION() macro
auxdisplay: linedisp: Support configuring the boot message
auxdisplay: charlcd: Provide a forward declaration
eb966e0...
by
Linus Torvalds <email address hidden>
Merge tag 'sound-fix-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of fixes gathered since the previous pull.
We see a bit large LOCs at a HD-audio quirk, but that's only bulk COEF
data, hence it's safe to take. In addition to that, there were two
minor fixes for MIDI 2.0 handling for ALSA core, and the rest are all
rather random small and device-specific fixes"
* tag 'sound-fix-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ASoC: fsl-asoc-card: Dynamically allocate memory for snd_soc_dai_link_components
ASoC: amd: yc: Support mic on Lenovo Thinkpad E16 Gen 2
ALSA: hda/realtek: Implement sound init sequence for Samsung Galaxy Book3 Pro 360
ALSA: hda/realtek: cs35l41: Fixup remaining asus strix models
ASoC: SOF: ipc4-topology: Preserve the DMA Link ID for ChainDMA on unprepare
ASoC: SOF: ipc4-topology: Only handle dai_config with HW_PARAMS for ChainDMA
ALSA: ump: Force 1 Group for MIDI1 FBs
ALSA: ump: Don't update FB name for static blocks
ALSA: usb-audio: Add a quirk for Sonix HD USB Camera
ASoC: TAS2781: Fix tasdev_load_calibrated_data()
ASoC: tegra: select CONFIG_SND_SIMPLE_CARD_UTILS
ASoC: Intel: use soc_intel_is_byt_cr() only when IOSF_MBI is reachable
ALSA: usb-audio: Move HD Webcam quirk to the right place
ALSA: hda: tas2781: mark const variables as __maybe_unused
ALSA: usb-audio: Fix microphone sound on HD webcam.
ASoC: sof: amd: fix for firmware reload failure in Vangogh platform
ASoC: Intel: Fix RT5650 SSP lookup
ASOC: SOF: Intel: hda-loader: only wait for HDaudio IOC for IPC4 devices
ASoC: SOF: imx8m: Fix DSP control regmap retrieval
0ba9b15...
by
Linus Torvalds <email address hidden>
i915:
- Reset intel_dp->link_trained before retraining the link
- Don't switch the LTTPR mode on an active link
- Do not consider preemption during execlists_dequeue for gen8
- Allow NULL memory region
xe:
- xe_exec ioctl minor fix on sync entry cleanup upon error
- SRIOV: limit VF LMEM provisioning
- Wedge mode fixes
v3d:
- fix indirect dispatch on newer v3d revs
panel:
- fix panel backlight bindings"
* tag 'drm-next-2024-07-26' of https://gitlab.freedesktop.org/drm/kernel: (39 commits)
drm/amdgpu: reset vm state machine after gpu reset(vram lost)
drm/amdgpu: add missed harvest check for VCN IP v4/v5
drm/amdgpu: Fix eeprom max record count
drm/amdgpu: fix ras UE error injection failure issue
drm/amd/display: Remove ASSERT if significance is zero in math_ceil2
drm/amd/display: Check for NULL pointer
drm/amdgpu/vcn: Use offsets local to VCN/JPEG in VF
drm/amdgpu: Add empty HDP flush function to VCN v4.0.3
drm/amdgpu: Add empty HDP flush function to JPEG v4.0.3
drm/amd/amdgpu: Fix uninitialized variable warnings
drm/amdgpu: Fix atomics on GFX12
drm/amdgpu/sdma5.2: Update wptr registers as well as doorbell
drm/i915: Allow NULL memory region
drm/i915/gt: Do not consider preemption during execlists_dequeue for gen8
dt-bindings: display: panel: samsung,atna33xc20: Document ATNA45AF01
drm/xe: Don't suspend device upon wedge
drm/xe: Wedge the entire device
drm/xe/pf: Limit fair VF LMEM provisioning
drm/xe/exec: Fix minor bug related to xe_sync_entry_cleanup
drm/amd/display: fix corruption with high refresh rates on DCN 3.0
...
65ad409...
by
Linus Torvalds <email address hidden>
Merge tag 's390-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull more s390 updates from Vasily Gorbik:
- Fix KMSAN build breakage caused by the conflict between s390 and
mm-stable trees
- Add KMSAN page markers for ptdump
- Add runtime constant support
- Fix __pa/__va for modules under non-GPL licenses by exporting
necessary vm_layout struct with EXPORT_SYMBOL to prevent linkage
problems
- Fix an endless loop in the CF_DIAG event stop in the CPU Measurement
Counter Facility code when the counter set size is zero
- Remove the PROTECTED_VIRTUALIZATION_GUEST config option and enable
its functionality by default
- Support allocation of multiple MSI interrupts per device and improve
logging of architecture-specific limitations
- Add support for lowcore relocation as a debugging feature to catch
all null ptr dereferences in the kernel address space, improving
detection beyond the current implementation's limited write access
protection
- Clean up and rework CPU alternatives to allow for callbacks and early
patching for the lowcore relocation
* tag 's390-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (39 commits)
s390: Remove protvirt and kvm config guards for uv code
s390/boot: Add cmdline option to relocate lowcore
s390/kdump: Make kdump ready for lowcore relocation
s390/entry: Make system_call() ready for lowcore relocation
s390/entry: Make ret_from_fork() ready for lowcore relocation
s390/entry: Make __switch_to() ready for lowcore relocation
s390/entry: Make restart_int_handler() ready for lowcore relocation
s390/entry: Make mchk_int_handler() ready for lowcore relocation
s390/entry: Make int handlers ready for lowcore relocation
s390/entry: Make pgm_check_handler() ready for lowcore relocation
s390/entry: Add base register to CHECK_VMAP_STACK/CHECK_STACK macro
s390/entry: Add base register to SIEEXIT macro
s390/entry: Add base register to MBEAR macro
s390/entry: Make __sie64a() ready for lowcore relocation
s390/head64: Make startup code ready for lowcore relocation
s390: Add infrastructure to patch lowcore accesses
s390/atomic_ops: Disable flag outputs constraint for GCC versions below 14.2.0
s390/entry: Move SIE indicator flag to thread info
s390/nmi: Simplify ptregs setup
s390/alternatives: Remove alternative facility list
...
a6294b5...
by
Linus Torvalds <email address hidden>
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The usual summary below, but the main fix is for the fast GUP lockless
page-table walk when we have a combination of compile-time and
run-time folding of the p4d and the pud respectively.
- Remove some redundant Kconfig conditionals
- Fix string output in ptrace selftest
- Fix fast GUP crashes in some page-table configurations
- Remove obsolete linker option when building the vDSO
- Fix some sysreg field definitions for the GIC"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mm: Fix lockless walks with static and dynamic page-table folding
arm64/sysreg: Correct the values for GICv4.1
arm64/vdso: Remove --hash-style=sysv
kselftest: missing arg in ptrace.c
arm64/Kconfig: Remove redundant 'if HAVE_FUNCTION_GRAPH_TRACER'
arm64: remove redundant 'if HAVE_ARCH_KASAN' in Kconfig
6467dfd...
by
Linus Torvalds <email address hidden>
Pull ceph updates from Ilya Dryomov:
"A small patchset to address bogus I/O errors and ultimately an
assertion failure in the face of watch errors with -o exclusive
mappings in RBD marked for stable and some assorted CephFS fixes"
* tag 'ceph-for-6.11-rc1' of https://github.com/ceph/ceph-client:
rbd: don't assume rbd_is_lock_owner() for exclusive mappings
rbd: don't assume RBD_LOCK_STATE_LOCKED for exclusive mappings
rbd: rename RBD_LOCK_STATE_RELEASING and releasing_wait
ceph: fix incorrect kmalloc size of pagevec mempool
ceph: periodically flush the cap releases
ceph: convert comma to semicolon in __ceph_dentry_dir_lease_touch()
ceph: use cap_wait_list only if debugfs is enabled
732c275...
by
Linus Torvalds <email address hidden>
Merge tag 'erofs-for-6.11-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull more erofs updates from Gao Xiang:
- Support STATX_DIOALIGN and FS_IOC_GETFSSYSFSPATH
- Fix a race of LZ4 decompression due to recent refactoring
- Another multi-page folio adaption in erofs_bread()
* tag 'erofs-for-6.11-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: convert comma to semicolon
erofs: support multi-page folios for erofs_bread()
erofs: add support for FS_IOC_GETFSSYSFSPATH
erofs: fix race in z_erofs_get_gbuf()
erofs: support STATX_DIOALIGN
dd90ad5...
by
Linus Torvalds <email address hidden>
Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull struct file leak fixes from Al Viro:
"a couple of leaks on failure exits missing fdput()"
* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
lirc: rc_dev_get_from_fd(): fix file leak
powerpc: fix a file leak in kvm_vcpu_ioctl_enable_cap()
