diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_vio.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_vio.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c index f02b04973710..e7fdb6d10eeb 100644 --- a/arch/powerpc/kvm/book3s_64_vio.c +++ b/arch/powerpc/kvm/book3s_64_vio.c @@ -59,32 +59,34 @@ static unsigned long kvmppc_stt_pages(unsigned long tce_pages) static long kvmppc_account_memlimit(unsigned long stt_pages, bool inc) { long ret = 0; + s64 locked_vm; if (!current || !current->mm) return ret; /* process exited */ down_write(¤t->mm->mmap_sem); + locked_vm = atomic64_read(¤t->mm->locked_vm); if (inc) { unsigned long locked, lock_limit; - locked = current->mm->locked_vm + stt_pages; + locked = locked_vm + stt_pages; lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; if (locked > lock_limit && !capable(CAP_IPC_LOCK)) ret = -ENOMEM; else - current->mm->locked_vm += stt_pages; + atomic64_add(stt_pages, ¤t->mm->locked_vm); } else { - if (WARN_ON_ONCE(stt_pages > current->mm->locked_vm)) - stt_pages = current->mm->locked_vm; + if (WARN_ON_ONCE(stt_pages > locked_vm)) + stt_pages = locked_vm; - current->mm->locked_vm -= stt_pages; + atomic64_sub(stt_pages, ¤t->mm->locked_vm); } pr_debug("[%d] RLIMIT_MEMLOCK KVM %c%ld %ld/%ld%s\n", current->pid, inc ? '+' : '-', stt_pages << PAGE_SHIFT, - current->mm->locked_vm << PAGE_SHIFT, + atomic64_read(¤t->mm->locked_vm) << PAGE_SHIFT, rlimit(RLIMIT_MEMLOCK), ret ? " - exceeded" : ""); |