When handling a page fault, it happens that the mmap_sem is released during the processing. As moving to range lock requires to pass the range parameter to the lock/unlock operation, this patch add a pointer to the range structure used when locking the mmap_sem to vm_fault structure.
Signed-off-by: Laurent Dufour <[email protected]> --- include/linux/mm.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 7cb17c6b97de..4ad96294c180 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -344,6 +344,9 @@ struct vm_fault { * page table to avoid allocation from * atomic context. */ +#ifdef CONFIG_MEM_RANGE_LOCK + struct range_lock *lockrange; /* Range lock interval */ +#endif }; /* page entry size for vm->huge_fault() */ -- 2.7.4
