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| author | Ingo Molnar <mingo@kernel.org> | 2017-12-12 13:25:54 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-12-12 13:25:54 +0100 |
| commit | 76523de61993d015f7895d06deacd3fd454574a1 (patch) | |
| tree | 7b2890ac9733c55ff73c72bba7b6b5c788ba925b /arch/arm64/kernel/process.c | |
| parent | e7ed9d9bd0375c74fe6e27d8bc73d3c6f4c8c3bc (diff) | |
| parent | 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 (diff) | |
| download | linux-76523de61993d015f7895d06deacd3fd454574a1.tar.gz linux-76523de61993d015f7895d06deacd3fd454574a1.tar.bz2 linux-76523de61993d015f7895d06deacd3fd454574a1.zip | |
Merge tag 'v4.15-rc3' into perf/core, to refresh the tree
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/process.c')
| -rw-r--r-- | arch/arm64/kernel/process.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index b2adcce7bc18..6b7dcf4310ac 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -314,6 +314,15 @@ int copy_thread(unsigned long clone_flags, unsigned long stack_start, clear_tsk_thread_flag(p, TIF_SVE); p->thread.sve_state = NULL; + /* + * In case p was allocated the same task_struct pointer as some + * other recently-exited task, make sure p is disassociated from + * any cpu that may have run that now-exited task recently. + * Otherwise we could erroneously skip reloading the FPSIMD + * registers for p. + */ + fpsimd_flush_task_state(p); + if (likely(!(p->flags & PF_KTHREAD))) { *childregs = *current_pt_regs(); childregs->regs[0] = 0; |