[Clang] Define `__SIG_ATOMIC_TYPE__` macro (#213934)
Define `__SIG_ATOMIC_TYPE__` for compatibility with GCC.
This fixes `riscv32-netbsd` and `riscv64-netbsd` system headers that
define `sig_atomic_t` using this macro.
Reference:
https://gcc.gnu.org/onlinedocs/gcc-16.1.0/cpp/Common-Predefined-Macros.html
Follow up of #199678, Closes #213895
[Clang][AMDGPU] Add ``amdgpu_av("none")`` attribute for atomic expressions (#199622)
Add a statement attribute that suppresses MakeAvailable/MakeVisible
cache operations on AMDGPU atomic instructions while preserving memory
ordering (waits). The attribute takes a string argument specifying the
mode. Currently "none" is the only supported mode. The resulting atomic
or fence instruction carries !mmra !{!"amdgcn-av", !"none"} metadata.
This only works with builtins that get lowered to intrinsics or
instructions. The attribute does not survive inlining. For example, a
C++ std atomic is typically a wrapper around a Clang builtin, and
applying this attribute on the std atomic does not remove the
MakeAvailableMakeVisible semantics built into it.
Part of a stack:
- #199486
- #199621
- #199489
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igc: defer sysctl-driven reinit to the admin task
igc_sysctl_eee() and igc_sysctl_dmac() called igc_if_init() directly.
Request the reset through iflib instead, and skipping while the interface
is down; the new value is picked up by the next init.
Unlike e1000, igc has no ASSERT_CTX_LOCK_HELD and no acquire_swflag
path, so the defect is silent here rather than an assertion failure.
While here also remove unnecessary igc_if_init uses:
iflib_if_init_locked() already runs after IFDI_RESUME and
IFDI_MEDIA_CHANGE, so the trailing *_if_init() only added an unstopped
IFDI_INIT that the following iflib_stop() undoes.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D58629
igc: defer sysctl-driven reinit to the admin task
igc_sysctl_eee() and igc_sysctl_dmac() called igc_if_init() directly.
Request the reset through iflib instead, and skipping while the interface
is down; the new value is picked up by the next init.
Unlike e1000, igc has no ASSERT_CTX_LOCK_HELD and no acquire_swflag
path, so the defect is silent here rather than an assertion failure.
While here also remove unnecessary igc_if_init uses:
iflib_if_init_locked() already runs after IFDI_RESUME and
IFDI_MEDIA_CHANGE, so the trailing *_if_init() only added an unstopped
IFDI_INIT that the following iflib_stop() undoes.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D58629
e1000: defer sysctl-driven reinit to the admin task
Request the reset through iflib and let the admin task perform the
stop/init under the context lock, matching what the VF and SR-IOV paths
already do.
The assertion is compiled out without INVARIANTS, where the same write
instead resets the MAC and takes the ICH software flag while the queues
stay live and an ioctl or the admin task may be running.
While here also remove unnecessary em_if_init uses:
iflib_if_init_locked() already runs after IFDI_RESUME and
IFDI_MEDIA_CHANGE, so the trailing *_if_init() only added an unstopped
IFDI_INIT that the following iflib_stop() undoes.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D58628
e1000: defer sysctl-driven reinit to the admin task
Request the reset through iflib and let the admin task perform the
stop/init under the context lock, matching what the VF and SR-IOV paths
already do.
The assertion is compiled out without INVARIANTS, where the same write
instead resets the MAC and takes the ICH software flag while the queues
stay live and an ioctl or the admin task may be running.
While here also remove unnecessary em_if_init uses:
iflib_if_init_locked() already runs after IFDI_RESUME and
IFDI_MEDIA_CHANGE, so the trailing *_if_init() only added an unstopped
IFDI_INIT that the following iflib_stop() undoes.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D58628
