linux.git/drivers/macintosh, branch v5.15.114 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git macintosh: via-pmu-led: requires ATA to be set 2023-05-11T14:00:34+00:00 Randy Dunlap rdunlap@infradead.org 2023-02-23T01:42:41+00:00 f7107d44dff701b9f3262de7e5aff82bf42daa62 [ Upstream commit 05dce4ba125336875cd3eed3c1503fa81cd2f691 ] LEDS_TRIGGER_DISK depends on ATA, so selecting LEDS_TRIGGER_DISK when ATA is not set/enabled causes a Kconfig warning: WARNING: unmet direct dependencies detected for LEDS_TRIGGER_DISK Depends on [n]: NEW_LEDS [=y] && LEDS_TRIGGERS [=y] && ATA [=n] Selected by [y]: - ADB_PMU_LED_DISK [=y] && MACINTOSH_DRIVERS [=y] && ADB_PMU_LED [=y] && LEDS_CLASS [=y] Fix this by making ADB_PMU_LED_DISK depend on ATA. Seen on both PPC32 and PPC64. Fixes: 0e865a80c135 ("macintosh: Remove dependency on IDE_GD_ATA if ADB_PMU_LED_DISK is selected") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230223014241.20878-1-rdunlap@infradead.org Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 05dce4ba125336875cd3eed3c1503fa81cd2f691 ]

LEDS_TRIGGER_DISK depends on ATA, so selecting LEDS_TRIGGER_DISK
when ATA is not set/enabled causes a Kconfig warning:

WARNING: unmet direct dependencies detected for LEDS_TRIGGER_DISK
  Depends on [n]: NEW_LEDS [=y] && LEDS_TRIGGERS [=y] && ATA [=n]
  Selected by [y]:
  - ADB_PMU_LED_DISK [=y] && MACINTOSH_DRIVERS [=y] && ADB_PMU_LED [=y] && LEDS_CLASS [=y]

Fix this by making ADB_PMU_LED_DISK depend on ATA.

Seen on both PPC32 and PPC64.

Fixes: 0e865a80c135 ("macintosh: Remove dependency on IDE_GD_ATA if ADB_PMU_LED_DISK is selected")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230223014241.20878-1-rdunlap@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh/windfarm_smu_sat: Add missing of_node_put() 2023-05-11T14:00:34+00:00 Liang He windhl@126.com 2023-03-30T03:35:58+00:00 da961d510b21deed7f8317ff6fc601f4aa2dc038 [ Upstream commit 631cf002826007ab7415258ee647dcaf8845ad5a ] We call of_node_get() in wf_sat_probe() after sat is created, so we need the of_node_put() before *kfree(sat)*. Fixes: ac171c46667c ("[PATCH] powerpc: Thermal control for dual core G5s") Signed-off-by: Liang He <windhl@126.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20230330033558.2562778-1-windhl@126.com Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 631cf002826007ab7415258ee647dcaf8845ad5a ]

We call of_node_get() in wf_sat_probe() after sat is created,
so we need the of_node_put() before *kfree(sat)*.

Fixes: ac171c46667c ("[PATCH] powerpc: Thermal control for dual core G5s")
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230330033558.2562778-1-windhl@126.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh: windfarm: Use unsigned type for 1-bit bitfields 2023-03-17T07:49:01+00:00 Nathan Chancellor nathan@kernel.org 2023-02-15T17:12:12+00:00 2c75e258adb90228bc7fddd505287782c0b95975 [ Upstream commit 748ea32d2dbd813d3bd958117bde5191182f909a ] Clang warns: drivers/macintosh/windfarm_lm75_sensor.c:63:14: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion] lm->inited = 1; ^ ~ drivers/macintosh/windfarm_smu_sensors.c:356:19: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion] pow->fake_volts = 1; ^ ~ drivers/macintosh/windfarm_smu_sensors.c:368:18: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion] pow->quadratic = 1; ^ ~ There is no bug here since no code checks the actual value of these fields, just whether or not they are zero (boolean context), but this can be easily fixed by switching to an unsigned type. Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20230215-windfarm-wsingle-bit-bitfield-constant-conversion-v1-1-26415072e855@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 748ea32d2dbd813d3bd958117bde5191182f909a ]

Clang warns:

  drivers/macintosh/windfarm_lm75_sensor.c:63:14: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
                  lm->inited = 1;
                             ^ ~

  drivers/macintosh/windfarm_smu_sensors.c:356:19: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
                  pow->fake_volts = 1;
                                  ^ ~
  drivers/macintosh/windfarm_smu_sensors.c:368:18: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion]
                  pow->quadratic = 1;
                                 ^ ~

There is no bug here since no code checks the actual value of these
fields, just whether or not they are zero (boolean context), but this
can be easily fixed by switching to an unsigned type.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230215-windfarm-wsingle-bit-bitfield-constant-conversion-v1-1-26415072e855@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh/macio-adb: check the return value of ioremap() 2022-12-31T12:14:35+00:00 Xie Shaowen studentxswpy@163.com 2022-08-02T07:41:48+00:00 be2b9b1a60b7a7cafa9336e58547ceed0223327c [ Upstream commit dbaa3105736d4d73063ea0a3b01cd7fafce924e6 ] The function ioremap() in macio_init() can fail, so its return value should be checked. Fixes: 36874579dbf4c ("[PATCH] powerpc: macio-adb build fix") Reported-by: Hacash Robot <hacashRobot@santino.com> Signed-off-by: Xie Shaowen <studentxswpy@163.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220802074148.3213659-1-studentxswpy@163.com Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit dbaa3105736d4d73063ea0a3b01cd7fafce924e6 ]

The function ioremap() in macio_init() can fail, so its return value
should be checked.

Fixes: 36874579dbf4c ("[PATCH] powerpc: macio-adb build fix")
Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: Xie Shaowen <studentxswpy@163.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220802074148.3213659-1-studentxswpy@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh: fix possible memory leak in macio_add_one_device() 2022-12-31T12:14:35+00:00 Yang Yingliang yangyingliang@huawei.com 2022-11-04T03:25:51+00:00 19ded60b40e86b0903c8d5bd0161437ed5107a8b [ Upstream commit 5ca86eae55a2f006e6c1edd2029b2cacb6979515 ] Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array"), the name of device is allocated dynamically. It needs to be freed when of_device_register() fails. Call put_device() to give up the reference that's taken in device_initialize(), so that it can be freed in kobject_cleanup() when the refcount hits 0. macio device is freed in macio_release_dev(), so the kfree() can be removed. Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221104032551.1075335-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 5ca86eae55a2f006e6c1edd2029b2cacb6979515 ]

Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically. It
needs to be freed when of_device_register() fails. Call put_device() to
give up the reference that's taken in device_initialize(), so that it
can be freed in kobject_cleanup() when the refcount hits 0.

macio device is freed in macio_release_dev(), so the kfree() can be
removed.

Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221104032551.1075335-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh/adb: fix oob read in do_adb_query() function 2022-08-11T11:07:54+00:00 Ning Qiang sohu0106@126.com 2022-07-13T15:37:34+00:00 c81d1bb58c88ab831e02539a26ad47860e8d6f0c commit fd97e4ad6d3b0c9fce3bca8ea8e6969d9ce7423b upstream. In do_adb_query() function of drivers/macintosh/adb.c, req->data is copied form userland. The parameter "req->data[2]" is missing check, the array size of adb_handler[] is 16, so adb_handler[req->data[2]].original_address and adb_handler[req->data[2]].handler_id will lead to oob read. Cc: stable <stable@kernel.org> Signed-off-by: Ning Qiang <sohu0106@126.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220713153734.2248-1-sohu0106@126.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit fd97e4ad6d3b0c9fce3bca8ea8e6969d9ce7423b upstream.

In do_adb_query() function of drivers/macintosh/adb.c, req->data is copied
form userland. The parameter "req->data[2]" is missing check, the array
size of adb_handler[] is 16, so adb_handler[req->data[2]].original_address and
adb_handler[req->data[2]].handler_id will lead to oob read.

Cc: stable <stable@kernel.org>
Signed-off-by: Ning Qiang <sohu0106@126.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220713153734.2248-1-sohu0106@126.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
macintosh: via-pmu and via-cuda need RTC_LIB 2022-06-09T08:23:12+00:00 Randy Dunlap rdunlap@infradead.org 2022-04-10T16:10:35+00:00 f04604987c7b054c8bc63b1814dc56d161ba587a [ Upstream commit 9a9c5ff5fff87eb1a43db0d899473554e408fd7b ] Fix build when RTC_LIB is not set/enabled. Eliminates these build errors: m68k-linux-ld: drivers/macintosh/via-pmu.o: in function `pmu_set_rtc_time': drivers/macintosh/via-pmu.c:1769: undefined reference to `rtc_tm_to_time64' m68k-linux-ld: drivers/macintosh/via-cuda.o: in function `cuda_set_rtc_time': drivers/macintosh/via-cuda.c:797: undefined reference to `rtc_tm_to_time64' Fixes: 0792a2c8e0bb ("macintosh: Use common code to access RTC") Reported-by: kernel test robot <lkp@intel.com> Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220410161035.592-1-rdunlap@infradead.org Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 9a9c5ff5fff87eb1a43db0d899473554e408fd7b ]

Fix build when RTC_LIB is not set/enabled.
Eliminates these build errors:

m68k-linux-ld: drivers/macintosh/via-pmu.o: in function `pmu_set_rtc_time':
drivers/macintosh/via-pmu.c:1769: undefined reference to `rtc_tm_to_time64'
m68k-linux-ld: drivers/macintosh/via-cuda.o: in function `cuda_set_rtc_time':
drivers/macintosh/via-cuda.c:797: undefined reference to `rtc_tm_to_time64'

Fixes: 0792a2c8e0bb ("macintosh: Use common code to access RTC")
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220410161035.592-1-rdunlap@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
macintosh/via-pmu: Fix build failure when CONFIG_INPUT is disabled 2022-06-09T08:22:43+00:00 Finn Thain fthain@linux-m68k.org 2022-04-07T10:11:32+00:00 787255e6190a9bc171dbab642344dfb37b0e5ad8 [ Upstream commit 86ce436e30d86327c9f5260f718104ae7b21f506 ] drivers/macintosh/via-pmu-event.o: In function `via_pmu_event': via-pmu-event.c:(.text+0x44): undefined reference to `input_event' via-pmu-event.c:(.text+0x68): undefined reference to `input_event' via-pmu-event.c:(.text+0x94): undefined reference to `input_event' via-pmu-event.c:(.text+0xb8): undefined reference to `input_event' drivers/macintosh/via-pmu-event.o: In function `via_pmu_event_init': via-pmu-event.c:(.init.text+0x20): undefined reference to `input_allocate_device' via-pmu-event.c:(.init.text+0xc4): undefined reference to `input_register_device' via-pmu-event.c:(.init.text+0xd4): undefined reference to `input_free_device' make[1]: *** [Makefile:1155: vmlinux] Error 1 make: *** [Makefile:350: __build_one_by_one] Error 2 Don't call into the input subsystem unless CONFIG_INPUT is built-in. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Finn Thain <fthain@linux-m68k.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5edbe76ce68227f71e09af4614cc4c1bd61c7ec8.1649326292.git.fthain@linux-m68k.org Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 86ce436e30d86327c9f5260f718104ae7b21f506 ]

drivers/macintosh/via-pmu-event.o: In function `via_pmu_event':
via-pmu-event.c:(.text+0x44): undefined reference to `input_event'
via-pmu-event.c:(.text+0x68): undefined reference to `input_event'
via-pmu-event.c:(.text+0x94): undefined reference to `input_event'
via-pmu-event.c:(.text+0xb8): undefined reference to `input_event'
drivers/macintosh/via-pmu-event.o: In function `via_pmu_event_init':
via-pmu-event.c:(.init.text+0x20): undefined reference to `input_allocate_device'
via-pmu-event.c:(.init.text+0xc4): undefined reference to `input_register_device'
via-pmu-event.c:(.init.text+0xd4): undefined reference to `input_free_device'
make[1]: *** [Makefile:1155: vmlinux] Error 1
make: *** [Makefile:350: __build_one_by_one] Error 2

Don't call into the input subsystem unless CONFIG_INPUT is built-in.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/5edbe76ce68227f71e09af4614cc4c1bd61c7ec8.1649326292.git.fthain@linux-m68k.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
memblock: introduce saner 'memblock_free_ptr()' interface 2021-09-14T20:23:22+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-09-14T20:23:22+00:00 77e02cf57b6cff9919949defb7fd9b8ac16399a2 The boot-time allocation interface for memblock is a mess, with 'memblock_alloc()' returning a virtual pointer, but then you are supposed to free it with 'memblock_free()' that takes a _physical_ address. Not only is that all kinds of strange and illogical, but it actually causes bugs, when people then use it like a normal allocation function, and it fails spectacularly on a NULL pointer: https://lore.kernel.org/all/20210912140820.GD25450@xsang-OptiPlex-9020/ or just random memory corruption if the debug checks don't catch it: https://lore.kernel.org/all/61ab2d0c-3313-aaab-514c-e15b7aa054a0@suse.cz/ I really don't want to apply patches that treat the symptoms, when the fundamental cause is this horribly confusing interface. I started out looking at just automating a sane replacement sequence, but because of this mix or virtual and physical addresses, and because people have used the "__pa()" macro that can take either a regular kernel pointer, or just the raw "unsigned long" address, it's all quite messy. So this just introduces a new saner interface for freeing a virtual address that was allocated using 'memblock_alloc()', and that was kept as a regular kernel pointer. And then it converts a couple of users that are obvious and easy to test, including the 'xbc_nodes' case in lib/bootconfig.c that caused problems. Reported-by: kernel test robot <oliver.sang@intel.com> Fixes: 40caa127f3c7 ("init: bootconfig: Remove all bootconfig data when the init memory is removed") Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
The boot-time allocation interface for memblock is a mess, with
'memblock_alloc()' returning a virtual pointer, but then you are
supposed to free it with 'memblock_free()' that takes a _physical_
address.

Not only is that all kinds of strange and illogical, but it actually
causes bugs, when people then use it like a normal allocation function,
and it fails spectacularly on a NULL pointer:

   https://lore.kernel.org/all/20210912140820.GD25450@xsang-OptiPlex-9020/

or just random memory corruption if the debug checks don't catch it:

   https://lore.kernel.org/all/61ab2d0c-3313-aaab-514c-e15b7aa054a0@suse.cz/

I really don't want to apply patches that treat the symptoms, when the
fundamental cause is this horribly confusing interface.

I started out looking at just automating a sane replacement sequence,
but because of this mix or virtual and physical addresses, and because
people have used the "__pa()" macro that can take either a regular
kernel pointer, or just the raw "unsigned long" address, it's all quite
messy.

So this just introduces a new saner interface for freeing a virtual
address that was allocated using 'memblock_alloc()', and that was kept
as a regular kernel pointer.  And then it converts a couple of users
that are obvious and easy to test, including the 'xbc_nodes' case in
lib/bootconfig.c that caused problems.

Reported-by: kernel test robot <oliver.sang@intel.com>
Fixes: 40caa127f3c7 ("init: bootconfig: Remove all bootconfig data when the init memory is removed")
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild 2021-09-03T22:33:47+00:00 Linus Torvalds torvalds@linux-foundation.org 2021-09-03T22:33:47+00:00 b250e6d141ce4f0d0ada60e4b5db577050e5feb0 Pull Kbuild updates from Masahiro Yamada: - Add -s option (strict mode) to merge_config.sh to make it fail when any symbol is redefined. - Show a warning if a different compiler is used for building external modules. - Infer --target from ARCH for CC=clang to let you cross-compile the kernel without CROSS_COMPILE. - Make the integrated assembler default (LLVM_IAS=1) for CC=clang. - Add <linux/stdarg.h> to the kernel source instead of borrowing <stdarg.h> from the compiler. - Add Nick Desaulniers as a Kbuild reviewer. - Drop stale cc-option tests. - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG to handle symbols in inline assembly. - Show a warning if 'FORCE' is missing for if_changed rules. - Various cleanups * tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kbuild: redo fake deps at include/ksym/*.h kbuild: clean up objtool_args slightly modpost: get the *.mod file path more simply checkkconfigsymbols.py: Fix the '--ignore' option kbuild: merge vmlinux_link() between ARCH=um and other architectures kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh kbuild: merge vmlinux_link() between the ordinary link and Clang LTO kbuild: remove stale *.symversions kbuild: remove unused quiet_cmd_update_lto_symversions gen_compile_commands: extract compiler command from a series of commands x86: remove cc-option-yn test for -mtune= arc: replace cc-option-yn uses with cc-option s390: replace cc-option-yn uses with cc-option ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild sparc: move the install rule to arch/sparc/Makefile security: remove unneeded subdir-$(CONFIG_...) kbuild: sh: remove unused install script kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y kbuild: Switch to 'f' variants of integrated assembler flag kbuild: Shuffle blank line to improve comment meaning ... 
Pull Kbuild updates from Masahiro Yamada:

 - Add -s option (strict mode) to merge_config.sh to make it fail when
   any symbol is redefined.

 - Show a warning if a different compiler is used for building external
   modules.

 - Infer --target from ARCH for CC=clang to let you cross-compile the
   kernel without CROSS_COMPILE.

 - Make the integrated assembler default (LLVM_IAS=1) for CC=clang.

 - Add <linux/stdarg.h> to the kernel source instead of borrowing
   <stdarg.h> from the compiler.

 - Add Nick Desaulniers as a Kbuild reviewer.

 - Drop stale cc-option tests.

 - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
   to handle symbols in inline assembly.

 - Show a warning if 'FORCE' is missing for if_changed rules.

 - Various cleanups

* tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
  kbuild: redo fake deps at include/ksym/*.h
  kbuild: clean up objtool_args slightly
  modpost: get the *.mod file path more simply
  checkkconfigsymbols.py: Fix the '--ignore' option
  kbuild: merge vmlinux_link() between ARCH=um and other architectures
  kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
  kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
  kbuild: remove stale *.symversions
  kbuild: remove unused quiet_cmd_update_lto_symversions
  gen_compile_commands: extract compiler command from a series of commands
  x86: remove cc-option-yn test for -mtune=
  arc: replace cc-option-yn uses with cc-option
  s390: replace cc-option-yn uses with cc-option
  ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild
  sparc: move the install rule to arch/sparc/Makefile
  security: remove unneeded subdir-$(CONFIG_...)
  kbuild: sh: remove unused install script
  kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
  kbuild: Switch to 'f' variants of integrated assembler flag
  kbuild: Shuffle blank line to improve comment meaning
  ...