diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/fault_32.c | 6 | ||||
| -rw-r--r-- | arch/x86/mm/fault_64.c | 2 | ||||
| -rw-r--r-- | arch/x86/mm/pageattr_64.c | 9 |
3 files changed, 11 insertions, 6 deletions
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c index 6555c3d..4d3e538 100644 --- a/arch/x86/mm/fault_32.c +++ b/arch/x86/mm/fault_32.c @@ -471,8 +471,8 @@ bad_area_nosemaphore: printk_ratelimit()) { printk("%s%s[%d]: segfault at %08lx eip %08lx " "esp %08lx error %lx\n", - tsk->pid > 1 ? KERN_INFO : KERN_EMERG, - tsk->comm, tsk->pid, address, regs->eip, + task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG, + tsk->comm, task_pid_nr(tsk), address, regs->eip, regs->esp, error_code); } tsk->thread.cr2 = address; @@ -587,7 +587,7 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); - if (is_init(tsk)) { + if (is_global_init(tsk)) { yield(); down_read(&mm->mmap_sem); goto survive; diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c index 5e0e549..5149ac1 100644 --- a/arch/x86/mm/fault_64.c +++ b/arch/x86/mm/fault_64.c @@ -554,7 +554,7 @@ no_context: */ out_of_memory: up_read(&mm->mmap_sem); - if (is_init(current)) { + if (is_global_init(current)) { yield(); goto again; } diff --git a/arch/x86/mm/pageattr_64.c b/arch/x86/mm/pageattr_64.c index 8a4f65b..c7b7dfe 100644 --- a/arch/x86/mm/pageattr_64.c +++ b/arch/x86/mm/pageattr_64.c @@ -230,9 +230,14 @@ void global_flush_tlb(void) struct page *pg, *next; struct list_head l; - down_read(&init_mm.mmap_sem); + /* + * Write-protect the semaphore, to exclude two contexts + * doing a list_replace_init() call in parallel and to + * exclude new additions to the deferred_pages list: + */ + down_write(&init_mm.mmap_sem); list_replace_init(&deferred_pages, &l); - up_read(&init_mm.mmap_sem); + up_write(&init_mm.mmap_sem); flush_map(&l); |