diff options
author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-29 10:39:10 -0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-29 10:39:10 -0300 |
commit | b0a752d43b1566451332bcb5b52b9694dfe7896c (patch) | |
tree | 1d5ea27a0ef6e74e2b9692e6c02d8d48710d1d36 /kernel/fork.c | |
parent | 50fa3a531e8e4b58550171fb159d0aa578c6b52d (diff) | |
parent | a5e13c6df0e41702d2b2c77c8ad41677ebb065b3 (diff) |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes sent via perf/urgent and in the BPF tools/ directories.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r-- | kernel/fork.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index d3171e8e88e5..426cd0c51f9e 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -994,6 +994,13 @@ static void mm_init_owner(struct mm_struct *mm, struct task_struct *p) #endif } +static void mm_init_pasid(struct mm_struct *mm) +{ +#ifdef CONFIG_IOMMU_SUPPORT + mm->pasid = INIT_PASID; +#endif +} + static void mm_init_uprobes_state(struct mm_struct *mm) { #ifdef CONFIG_UPROBES @@ -1024,6 +1031,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p, mm_init_cpumask(mm); mm_init_aio(mm); mm_init_owner(mm, p); + mm_init_pasid(mm); RCU_INIT_POINTER(mm->exe_file, NULL); mmu_notifier_subscriptions_init(mm); init_tlb_flush_pending(mm); @@ -1940,8 +1948,14 @@ static __latent_entropy struct task_struct *copy_process( p = dup_task_struct(current, node); if (!p) goto fork_out; - if (args->io_thread) + if (args->io_thread) { + /* + * Mark us an IO worker, and block any signal that isn't + * fatal or STOP + */ p->flags |= PF_IO_WORKER; + siginitsetinv(&p->blocked, sigmask(SIGKILL)|sigmask(SIGSTOP)); + } /* * This _must_ happen before we call free_task(), i.e. before we jump @@ -2430,14 +2444,8 @@ struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node) .stack_size = (unsigned long)arg, .io_thread = 1, }; - struct task_struct *tsk; - tsk = copy_process(NULL, 0, node, &args); - if (!IS_ERR(tsk)) { - sigfillset(&tsk->blocked); - sigdelsetmask(&tsk->blocked, sigmask(SIGKILL)); - } - return tsk; + return copy_process(NULL, 0, node, &args); } /* |