diff options
Diffstat (limited to 'arch/um/kernel/trap_kern.c')
| -rw-r--r-- | arch/um/kernel/trap_kern.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c index 95c8f8733ba..0d4c10a7360 100644 --- a/arch/um/kernel/trap_kern.c +++ b/arch/um/kernel/trap_kern.c @@ -95,7 +95,16 @@ survive: pte = pte_offset_kernel(pmd, address); } while(!pte_present(*pte)); err = 0; + /* The below warning was added in place of + * pte_mkyoung(); if (is_write) pte_mkdirty(); + * If it's triggered, we'd see normally a hang here (a clean pte is + * marked read-only to emulate the dirty bit). + * However, the generic code can mark a PTE writable but clean on a + * concurrent read fault, triggering this harmlessly. So comment it out. + */ +#if 0 WARN_ON(!pte_young(*pte) || (is_write && !pte_dirty(*pte))); +#endif flush_tlb_page(vma, address); out: up_read(&mm->mmap_sem); |