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Nathan Chancellor 5af4761d11 ALSA: pcm: Revert bufs move in snd_pcm_xfern_frames_ioctl() 
[ Upstream commit 0585c53b21 ]

When building with clang older than 17 targeting architectures that use
asm goto for their get_user() and put_user(), such as arm64, after
commit f3d233daf0 ("ALSA: pcm: Relax __free() variable declarations"),
there are bogus errors around skipping over a variable declared with the
cleanup attribute:

  sound/core/pcm_native.c:3308:6: error: cannot jump from this asm goto statement to one of its possible targets
          if (put_user(result, &_xfern->result))
              ^
  ...
  arch/arm64/include/asm/uaccess.h:298:2: note: expanded from macro '__put_mem_asm'
          asm goto(
          ^
  sound/core/pcm_native.c:3295:6: note: possible target of asm goto statement
          if (put_user(0, &_xfern->result))
              ^
  ...
  sound/core/pcm_native.c:3300:8: note: jump exits scope of variable with __attribute__((cleanup))
          void *bufs __free(kfree) =
                ^

clang-17 fixed a bug in clang's jump scope checker [1] where all labels
in a function were checked as valid targets for all asm goto instances
in a function, regardless of whether they were actual targets in a
paricular asm goto's provided list of labels.

To workaround this, revert the change done to
snd_pcm_xfern_frames_ioctl() by commit f3d233daf0 ("ALSA: pcm: Relax
__free() variable declarations") to avoid a variable declared with
cleanup from existing between multiple uses of asm goto. There are no
other uses of cleanup in this function so there should be low risk from
moving this variable back to the top of the function.

Link: https://github.com/ClangBuiltLinux/linux/issues/1886 [1]
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512190802.i4Jzbcsl-lkp@intel.com/
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20260106-pcm_native-revert-var-move-free-for-old-clang-v1-1-06a03693423d@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:22:00 -05:00
arch arm64: Force the use of CNTVCT_EL0 in __delay() 2026-03-04 07:21:58 -05:00
block block: decouple secure erase size limit from discard size limit 2026-03-04 07:20:56 -05:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-01-30 10:28:39 +01:00
Documentation ASoC: dt-bindings: asahi-kasei,ak5558: Fix the supply names 2026-03-04 07:20:48 -05:00
drivers NTB: ntb_transport: Fix too small buffer for debugfs_name 2026-03-04 07:21:59 -05:00
fs cifs: some missing initializations on replay 2026-03-04 07:21:58 -05:00
include tracing: Wake up poll waiters for hist files when removing an event 2026-03-04 07:21:59 -05:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:33:50 +02:00
io_uring io_uring/filetable: clamp alloc_hint to the configured alloc range 2026-03-04 07:21:56 -05:00
ipc ipc: don't audit capability check in ipc_permissions() 2026-03-04 07:20:07 -05:00
kernel tracing: Wake up poll waiters for hist files when removing an event 2026-03-04 07:21:59 -05:00
lib Remove WARN_ALL_UNSEEDED_RANDOM kernel config option 2026-03-04 07:21:32 -05:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm: numa_memblks: Identify the accurate NUMA ID of CFMW 2026-03-04 07:21:57 -05:00
net net: nfc: nci: Fix parameter validation for packet data 2026-03-04 07:21:59 -05:00
rust rust: kbuild: pass -Zunstable-options for Rust 1.95.0 2026-03-04 07:21:54 -05:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:14:50 +01:00
scripts modpost: Amend ppc64 save/restfpr symnames for -Os build 2026-03-04 07:21:09 -05:00
security apparmor: fix aa_label to return state from compount and component match 2026-03-04 07:20:41 -05:00
sound ALSA: pcm: Revert bufs move in snd_pcm_xfern_frames_ioctl() 2026-03-04 07:22:00 -05:00
tools tools: Fix bitfield dependency failure 2026-03-04 07:21:50 -05:00
usr kbuild: uapi: Strip comments before size type check 2025-11-13 15:34:35 -05:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:40:17 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS gpiolib-acpi: Update file references in the Documentation and MAINTAINERS 2026-02-11 13:40:29 +01:00
Makefile kbuild: Add objtool to top-level clean target 2026-03-04 07:20:35 -05:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.