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author | Ard Biesheuvel <ardb@kernel.org> | 2024-01-11 12:24:48 +0100 |
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committer | Will Deacon <will@kernel.org> | 2024-01-12 13:48:27 +0100 |
commit | 3931261ecf46151a5e779c96fb3da00677b6dc37 (patch) | |
tree | a66aef908d4546b826c5f63fe461283f0018932a /kernel/sys_ni.c | |
parent | arm64: scs: Work around full LTO issue with dynamic SCS (diff) | |
download | linux-3931261ecf46151a5e779c96fb3da00677b6dc37.tar.xz linux-3931261ecf46151a5e779c96fb3da00677b6dc37.zip |
arm64: fpsimd: Bring cond_yield asm macro in line with new rules
We no longer disable softirqs or preemption when doing kernel mode SIMD,
and so for fully preemptible kernels, there is no longer a need to do any
explicit yielding (and for non-preemptible kernels, yielding is not
needed either).
That leaves voluntary preemption, where only explicit yield calls may
result in a reschedule. To retain the existing behavior for such a
configuration, we should take the new situation into account, where the
preempt count will be zero rather than one, and yielding to pending
softirqs is unnecessary.
Fixes: aefbab8e77eb ("arm64: fpsimd: Preserve/restore kernel mode NEON at context switch")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240111112447.577640-2-ardb+git@google.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'kernel/sys_ni.c')
0 files changed, 0 insertions, 0 deletions