powerpc: put the isync inside the TD_LOCK() checking loop
Fix a narrow window where the lock is unlocked but the checking CPU
hasn't flushed things appropriately.
Inside this window the CPU inside cpu_switch() will loop forever thinking
the destination thread is still blocked/locked even though it is not.
This manifests as the system hanging after starting all APs.
I've seen this reliably trigger in qemu-system-ppc64 running power9 pseries
guests; the more CPUs the more likely it triggers at boot.
PR: kern/292167
Differential Revision: https://reviews.freebsd.org/D54478
Reviewed by: jhibbits
MFC after: 1 week
Relnotes: yes
(cherry picked from commit 8df2e542146801fd01675e56724eaa567d04c209)
Merge commit faa5141b9be4 from file git (by Christos Zoulas):
PR/656: harry.sintonen: Fix bug in byte swapping that was caused by the change to make flags uint16_t and cont_level uint8_t.
This fixes using a magic.mgc built with a different endianness than
file(1) itself, e.g. when building powerpc64 on amd64.
PR: 292079
Fixes: ae316d1d1cff ("MFV: file 5.46.")
MFC after: 3 days
(cherry picked from commit 39047538cf5d8f26112f7b08b3c56967f70f7f94)
KERN_PROC - Fix KERN_PROC_ARGS and KERN_PROC_CWD to return length if oldptr==NULL.
Sysctl handlers still have to compute the full output, even when
oldptr == NULL. This is necessary to implement the behavior documented in
sysctl(3), that it will return the required buffer length in "oldlenp", if
"oldptr" is NULL and "oldlenp" is not NULL.
gnutls: disable GNUTLS_GAS_VERSION check for NetBSD
This was added in 2020 for CentOS 6. This test never worked on NetBSD
because the version number looks different there ($4 is always
"Binutils").
Perhaps this should be limited to Linux instead.
Avoids a fork during Makefile parsing.
[X86][NewPM] Port x86-fixup-bw-insts to NPM (#175399)
Similar to other pass portings. Refactor into an implementation class,
rename the old pass, and add a wrapper around the implementation for the
new pass manager. Handle PSI/MBFI similar to other backend passes.
lint: support 128-bit integer types unconditionally
Previously, 128-bit integer types were restricted to 64-bit platforms,
which was unnecessary and cluttered the code. The actual computations
are not affected, as lint performs all integer operations in 64-bit
mode.
