diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-03-17 10:32:28 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-02-13 22:20:11 (GMT) |
| commit | 9a58969cf8c3f2a5cf3b0cf04144ca2573758d42 (patch) | |
| tree | 314bd86e26d7f8c164b1cf70d794c3c8b0df61d6 /arch/s390 | |
| parent | 8f5ce951e9a668c3b1c749fc6fee9e8b5dd4654b (diff) | |
| download | linux-fsl-qoriq-9a58969cf8c3f2a5cf3b0cf04144ca2573758d42.tar.xz | |
mm: Fixup all fault handlers to check current->pagefault_disable
Necessary for decoupling pagefault disable from preempt count.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/mm/fault.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index fc66792..a4742e9 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -296,7 +296,8 @@ static inline int do_exception(struct pt_regs *regs, int access) * user context. */ fault = VM_FAULT_BADCONTEXT; - if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm)) + if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm || + tsk->pagefault_disabled)) goto out; address = trans_exc_code & __FAIL_ADDR_MASK; @@ -442,7 +443,8 @@ void __kprobes do_asce_exception(struct pt_regs *regs) clear_tsk_thread_flag(current, TIF_PER_TRAP); trans_exc_code = regs->int_parm_long; - if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm)) + if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm || + current->pagefault_disabled())) goto no_context; down_read(&mm->mmap_sem); |