On 11/6/2023 12:30 AM, Paolo Bonzini wrote:
From: Chao Peng
Add a new KVM exit type to allow userspace to handle memory faults that
KVM cannot resolve, but that userspace *may* be able to handle (without
terminating the guest).
KVM will initially use KVM_EXIT_MEMORY_FAULT to report implicit
PowerVM Hypervisor will schedule at a core granularity. However each
core can have more than one thread_groups. For better utilization in
case of a shared processor, its preferable for the scheduler to pack to
the lowest core. However there is no benefit of moving a thread between
two thread
Currently there are four Powerpc specific sched topologies. These are
all statically defined. However not all these topologies are used by
all Powerpc systems.
To avoid unnecessary degenerations by the scheduler, masks and flags
are compared. However if the sched topologies are build
There are some variables that are only updated at boot time.
So add __ro_after_init attribute to such variables
Signed-off-by: Srikar Dronamraju
---
Changelog:
v2 -> v3:
Use __ro_after_init instead of __read_mostly
Suggested by : Peter Zijlstra and Michael Ellerman
arch/powerpc/kernel/smp.c |
PowerVM systems configured in shared processors mode have some unique
challenges. Some device-tree properties will be missing on a shared
processor. Hence some sched domains may not make sense for shared processor
systems.
Most shared processor systems are over-provisioned. Underlying PowerVM
If there are shared processor LPARs, underlying Hypervisor can have more
virtual cores to handle than actual physical cores.
Starting with Power 9, a big core (aka SMT8 core) has 2 nearly
independent thread groups. On a shared processors LPARs, it helps to
pack threads to lesser number of cores
Like L2-cache info, coregroup information which is used to determine MC
sched domains is only present on dedicated LPARs. i.e PowerVM doesn't
export coregroup information for shared processor LPARs. Hence disable
creating MC domains on shared LPAR Systems.
Signed-off-by: Srikar Dronamraju
---
在 2023/11/8 20:58, Arnd Bergmann 写道:
From: Arnd Bergmann
This function is only called locally and does not need to be
global. Since there is no external prototype, gcc warns about
the non-static definition:
fs/jffs2/debug.c:160:6: error: no previous prototype for
Applying [1] and [2] reveals that this also breaks non-x86 builds- the
MEM_REGION_GPA/SLOT definitions are guarded behind an #ifdef
__x86_64__, while the usages introduced here aren't.
Should
On Sun, Nov 5, 2023 at 8:35 AM Paolo Bonzini wrote:
>
> + test_invalid_memory_region_flags();
be
On Wed, 8 Nov 2023 13:58:24 +0100
Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> Most architectures that support kprobes declare this function in their
> own asm/kprobes.h header and provide an override, but some are missing
> the prototype, which causes a warning for the __weak stub
On Wed, Nov 08, 2023 at 01:58:30PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> When -Wmissing-prototypes is enabled, the some asm-offsets.c files fail
> to build, even when this warning is disabled in the Makefile for normal
> files:
>
> arch/sparc/kernel/asm-offsets.c:22:5: error: no
On Wed, Nov 8, 2023 at 9:00 AM Anish Moorthy wrote:
>
> This commit breaks the arm64 selftests build btw: looks like a simple
> oversight?
Yup, fix is a one-liner. Posted below.
diff --git a/tools/testing/selftests/kvm/aarch64/page_fault_test.c
On Wed, Nov 8, 2023, at 21:42, Geert Uytterhoeven wrote:
>
> On Wed, Nov 8, 2023 at 2:01 PM Arnd Bergmann wrote:
>> From: Arnd Bergmann
>>
>> Microblaze runs into a single -Wmissing-prototypes warning when that is
>> enabled:
>>
>> arch/microblaze/kernel/traps.c:21:6: warning: no previous
On Wed, Nov 08, 2023 at 01:58:37PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> bch2_target_to_text_sb() is only called in the file it is defined in,
> and it has no extern prototype:
>
> fs/bcachefs/disk_groups.c:583:6: error: no previous prototype for
> 'bch2_target_to_text_sb'
On Wed, Nov 8, 2023, at 19:31, Christophe Leroy wrote:
> Le 08/11/2023 à 13:58, Arnd Bergmann a écrit :
> powerpc has functions doing more or less the same, they are called
> __c_kernel_clock_gettime() and alike with their prototypes siting in
> arch/powerpc/include/asm/vdso/gettimeofday.h
>
>
Hi Arnd,
Le 08/11/2023 à 13:58, Arnd Bergmann a écrit :
> From: Arnd Bergmann
>
> The VDSO functions are defined as globals in the kernel sources but intended
> to be called from userspace, so there is no need to declare them in a kernel
> side header.
>
> Without a prototype, this now causes
This commit breaks the arm64 selftests build btw: looks like a simple oversight?
$ cd ${LINUX_ROOT}/tools/testing/selftests/kvm
$ CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 make
# ...
aarch64/page_fault_test.c: In function ‘run_test’:
aarch64/page_fault_test.c:708:28: error: incompatible type
On Wed, 8 Nov 2023 14:18:09 + Geoff Levand wrote:
> Seems good to me. I'll test it next chance I get.
>
> Signed-off-by: Geoff Levand
Seems like this is best routed via powerpc:
Acked-by: Jakub Kicinski
Hi Arnd,
On 11/8/23 12:58, Arnd Bergmann wrote:
> From: Arnd Bergmann
>
> Allmodconfig kernels produce a missing-prototypes warning:
>
> arch/powerpc/platforms/ps3/gelic_udbg.c:239:6: error: no previous prototype
> for 'udbg_shutdown_ps3gelic' [-Werror=missing-prototypes]
>
> Move the
From: Arnd Bergmann
Over the years we went from > 1000 of warnings to under 100 earlier
this year, and I sent patches to address all the ones that I saw with
compile testing randcom configs on arm64, arm and x86 kernels. This is a
really useful warning, as it catches real bugs when there are
From: Arnd Bergmann
wr_reg_wa() is not an appropriate name for a global function, and doesn't need
to be global anyway, so mark it static and avoid the warning:
drivers/video/fbdev/fsl-diu-fb.c:493:6: error: no previous prototype for
'wr_reg_wa' [-Werror=missing-prototypes]
Fixes:
From: Arnd Bergmann
This function is only called locally and should always have been static:
drivers/usb/host/fsl-mph-dr-of.c:291:5: error: no previous prototype for
'fsl_usb2_mpc5121_init' [-Werror=missing-prototypes]
Fixes: 230f7ede6c2f ("USB: add USB EHCI support for MPC5121 SoC")
From: Arnd Bergmann
These functions are only called locally and should be static like the
other corresponding functions are:
arch/powerpc/platforms/powermac/smp.c:416:13: error: no previous prototype for
'smp_psurge_take_timebase' [-Werror=missing-prototypes]
416 | void __init
From: Arnd Bergmann
Allmodconfig builds show a warning about one function that is accidentally
marked global:
arch/powerpc/platforms/pasemi/setup.c:67:6: error: no previous prototype for
'pas_shutdown' [-Werror=missing-prototypes]
Fixes: 656fdf3ad8e0 ("powerpc/pasemi: Add Nemo board device
From: Arnd Bergmann
Allmodconfig kernels produce a missing-prototypes warning:
arch/powerpc/platforms/ps3/gelic_udbg.c:239:6: error: no previous prototype for
'udbg_shutdown_ps3gelic' [-Werror=missing-prototypes]
Move the declaration from a local header to asm/ps3.h where it can be
seen from
From: Arnd Bergmann
bch2_target_to_text_sb() is only called in the file it is defined in,
and it has no extern prototype:
fs/bcachefs/disk_groups.c:583:6: error: no previous prototype for
'bch2_target_to_text_sb' [-Werror=missing-prototypes]
Mark it static to avoid the warning and have the
From: Arnd Bergmann
The VDSO functions are defined as globals in the kernel sources but intended
to be called from userspace, so there is no need to declare them in a kernel
side header.
Without a prototype, this now causes warnings such as
arch/mips/vdso/vgettimeofday.c:14:5: error: no
From: Arnd Bergmann
The prototype for prepare_ftrace_return() is architecture specific and
can't be in a global header. Since it's normally called from assembly,
it doesn't really need a prototype, but we get a warning if it's missing:
arch/csky/kernel/ftrace.c:147:6: error: no previous
From: Arnd Bergmann
arch/alpha/mm/fault.c:85:1: error: no previous prototype for 'do_page_fault'
[-Werror=missing-prototypes]
arch/csky/mm/fault.c:187:17: error: no previous prototype for 'do_page_fault'
[-Werror=missing-prototypes]
arch/mips/mm/fault.c:323:17: error: no previous prototype for
From: Arnd Bergmann
The arch_jump_label_transform_static() function in csky was originally meant to
override the generic __weak function, but that got changed to an #ifndef check.
This showed up as a missing-prototype warning:
arch/csky/kernel/jump_label.c:43:6: error: no previous prototype for
From: Arnd Bergmann
sta2x11_get_instance() is a global function declared in asm/sta2x11.h,
but this header is not included before the definition, causing a warning:
arch/x86/pci/sta2x11-fixup.c:95:26: error: no previous prototype for
'sta2x11_get_instance' [-Werror=missing-prototypes]
Add the
From: Arnd Bergmann
Microblaze runs into a single -Wmissing-prototypes warning when that is
enabled:
arch/microblaze/kernel/traps.c:21:6: warning: no previous prototype for
'trap_init' [-Wmissing-prototypes]
Include the right header to avoid this.
Signed-off-by: Arnd Bergmann
---
From: Arnd Bergmann
When -Wmissing-prototypes is enabled, the some asm-offsets.c files fail
to build, even when this warning is disabled in the Makefile for normal
files:
arch/sparc/kernel/asm-offsets.c:22:5: error: no previous prototype for
'sparc32_foo' [-Werror=missing-prototypes]
From: Arnd Bergmann
The prototype was hidden in an #ifdef on x86, which causes a warning:
kernel/irq_work.c:72:13: error: no previous prototype for 'arch_irq_work_raise'
[-Werror=missing-prototypes]
Some architectures have a working prototype, while others don't.
Fix this by providing it in
From: Arnd Bergmann
These four functions have a normal definition for CONFIG_FAIR_GROUP_SCHED,
and empty one that is only referenced when FAIR_GROUP_SCHED is disabled
but CGROUP_SCHED is still enabled. If both are turned off, the functions
are still defined but the misisng prototype causes a W=1
From: Arnd Bergmann
With -Wmissing-prototypes enabled, the stackleak code produces a couple of
warnings that have no declarations because they are only called from assembler:
stackleak.c:127:25: error: no previous prototype for 'stackleak_erase'
[-Werror=missing-prototypes]
stackleak.c:139:25:
From: Arnd Bergmann
This is only used locally, so mark it static to avoid a warning:
drivers/parport/parport_gsc.c:395:5: error: no previous prototype for
'parport_gsc_init' [-Werror=missing-prototypes]
Acked-by: Helge Deller
Acked-by: Sudip Mukherjee
Signed-off-by: Arnd Bergmann
---
From: Arnd Bergmann
This function is defined globally in clocksource.c and used conditionally
in clockevent.c, which the declaration hidden when clockevent support
is disabled. This causes a harmless warning in the definition:
kernel/time/clocksource.c:1324:9: warning: no previous prototype for
From: Arnd Bergmann
Most architectures that support kprobes declare this function in their
own asm/kprobes.h header and provide an override, but some are missing
the prototype, which causes a warning for the __weak stub implementation:
kernel/kprobes.c:1865:12: error: no previous prototype for
From: Arnd Bergmann
This function is only called locally and does not need to be
global. Since there is no external prototype, gcc warns about
the non-static definition:
fs/jffs2/debug.c:160:6: error: no previous prototype for
'__jffs2_dbg_superblock_counts' [-Werror=missing-prototypes]
From: Arnd Bergmann
There is no global declaration for ida_dump() and no other
callers, so make it static to avoid this warning:
lib/test_ida.c:16:6: error: no previous prototype for 'ida_dump'
Fixes: 8ab8ba38d488 ("ida: Start new test_ida module")
Signed-off-by: Arnd Bergmann
---
From: Arnd Bergmann
I slightly dropped the ball on this since last sending the series in
August, but a number of warning fixes have made it into the kernel in
the meantime, both from my earlier submission and from architecture
maintainers.
I have none patches that remain from the previous
defconfig gcc
arc allmodconfig gcc
arc allnoconfig gcc
arc allyesconfig gcc
arc defconfig gcc
arc randconfig-001-20231108 gcc
arc
Em Tue, Nov 07, 2023 at 12:08:25PM +0530, Athira Rajeev escreveu:
> > On 07-Nov-2023, at 3:14 AM, Arnaldo Carvalho de Melo
> > wrote:
> >>> Reviewed-by: James Clark
> > Some are not applying, even after b4 picking up v2
> > Total patches: 3
> > Cover:
> >
Le 07/11/2023 à 06:57, Michael Ellerman a écrit :
> Linus Walleij writes:
>> There is a const in the returned value from pfn_to_kaddr()
>> but there are consumers that want to modify the result
>> and the generic function pfn_to_virt() in
>> does allow this, so let's relax this requirement and
On Wed, Nov 08, 2023 at 11:33:37AM +, Christophe Leroy wrote:
> As far as I remember, Daniel's proposal had some weaknesses that were
> never addressed. At that time I proposed an alternative series that was
> addressing most weaknesses, and my series was considered more mature
> that
Hi Pratyush,
Le 17/10/2023 à 12:40, Pratyush Brahma a écrit :
> Hi Daniel
>
> We have a usecase which requires this patch necessarily. For android
> usecases, we have two different build variants
> differentiated by defconfigs - production and debug. However, we only
> have a single dts for both
Hi Yuanjun,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.6 next-20231108]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented
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