Fix APInt::concat for zero-width operands (#207475)
APInt::concat triggered undefined behavior (invalid shift exponent) when
concatenating a zero-width operand with a 64-bit operand on the fast
path (combined width <= 64). For example, `I0.concat(I64)` resulted in
`U.VAL << 64`, which is UB.
Fix by checking for zero-width operands early and returning the other
operand. Added regression tests to `APIntTest.cpp`.
CI: move libclang python bindings tests to main CI (#201677)
This removes the separate python bindings CI, which run on the GitHub
free runners and take more than one hour to build libclang.
The tests are executed instead in the monolithic pipelines, whenever
clang would be tested.
That only tests whatever python version we set up for that pipeline.
This is fine in terms of resources because all the dependencies are
built anyway, and the tests themselves take less than one second to run
on the free runners.
Merge tag 'mm-hotfixes-stable-2026-07-06-17-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"20 hotfixes. 17 are for MM. 12 are cc:stable and the remaining 8
address post-7.1 issues or aren't considered suitable for backporting.
Two patches from SJ addresses a couple of quite old DAMON issues. And
two patches from Yichong Chen fixes tools/virtio build issues. The
remaining patches are singletons"
* tag 'mm-hotfixes-stable-2026-07-06-17-49' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
tools/include: include stdint.h for SIZE_MAX in overflow.h
tools/virtio: add missing compat definitions for vhost_net_test
mm: do file ownership checks with the proper mount idmap
samples/damon/mtier: fail early if address range parameters are invalid
mm: a second pagecache maintainer
mm/damon: add a kernel-doc comment for damon_ctx->rnd_state
mm/damon: add a kernel-doc comment for damon_ctx->probes
mailmap: add entries for Radu Rendec
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pdfork.2: clarify that PD_DAEMON acts on current file
Also do not start a new list for each flag item.
Reviewed by: markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D57124
[CodeGen] Rename prologpeilog to prolog-epilog (#207870)
This is primarily to ensure consistenct with the new pass manager where
the name of the pass is already prolog-epilog, which is more consistent
with our existing naming scheme. This is necessary to be able to run
existing llc invocations that explicitly specify prolog-epilog under the
NewPM automatically.
Assisted by Gemini.
procdesc: track count of open files
Introduce pd_fpcount that counts the number of file references to the
procdesc. Remove the PDF_CLOSED flag, now it is expressed as
pd_fpcount == 0.
Only send SIGKILL and clear pointers when we are closing the last file
referencing procdesc.
This should be nop until the next commit.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D57124
[ORC] Fix reinterpret_cast warning. (#207874)
https://github.com/llvm/llvm-project/pull/206725#issuecomment-4896222897
reported warnings on windows builds due to reinterpret_cast:
warning C4312: 'reinterpret_cast': conversion from 'unsigned int' to
'void *' of greater size
This commit fixes the issue by using ExecutorAddr::toPtr for conversion
instead of reinterpret_cast.
procdesc_exit(): assert that _exit() was called
Check that the P_WEXIT flag is set.
Requested by: markj
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D57124
CI: move libclang python byindings tests to main CI
This removes the separate python bindings CI, which run on the GitHub free
runners and take more than one hour to build libclang.
The tests are executed instead in the monolithic pipelines,
whenever clang would be tested.
This is fine in terms of resources because all the dependencies are
built anyway, and the tests themselves take less than one second to
run on the free runners.
[clang-doc] Move Markdown into its own subdirectory (#207856)
Removes the need for PARTIAL_SOURCES_INTENDED by giving clangDocMarkdown
its own directory. Addresses post-merge feedback on #205609.
nfsd: Optionally enable use of M_EXTPG mbufs for read replies
A test site determined that, for a Mellanox NIC which can handle
M_EXTPG mbufs, an improvement of 5-15% for read rate could be
achieved if the read reply was in M_EXTPG mbufs.
A patch that tried to determine if the outbound NIC supported
M_EXTPG mbufs (IFCAP_MEXTPG) did not pass review.
However, it does appear that this can be useful for NFS-over-RDMA.
(Which just happen to use NICs that do support M_EXTPG mbufs.)
As such, this patch enables them is xp_extpg is set to true,
which is never for now, but might be set true for RDMA or
when vfs.nfsd.enable_mextpg is set non-zero. (It is 0 by
default, so this is never enabled by default at this time.)
Tested by: Greg Becker <becker.greg at att.net>
MFC after: 2 weeks
