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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-11 08:41:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-11 08:41:08 +0100 |
| commit | 42e64571d516ef761d9f330c80493637cbf3bdda (patch) | |
| tree | 5f3df1c06c2d571efa5fd72d0c8022a80140eec2 /arch/arm64/kernel/process.c | |
| parent | b8f3bff057b017309fbd61fe74712b1f185b5399 (diff) | |
| parent | 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 (diff) | |
| download | lwn-42e64571d516ef761d9f330c80493637cbf3bdda.tar.gz lwn-42e64571d516ef761d9f330c80493637cbf3bdda.zip | |
Merge 4.15-rc3 into tty-next
We want the serial/tty fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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; |