diff options
| -rw-r--r-- | include/linux/mm.h | 5 | ||||
| -rw-r--r-- | mm/nommu.c | 11 |
2 files changed, 14 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 39aa409e84d5..4f2c33c273eb 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2323,6 +2323,9 @@ void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to); void truncate_pagecache_range(struct inode *inode, loff_t offset, loff_t end); int generic_error_remove_page(struct address_space *mapping, struct page *page); +struct vm_area_struct *lock_mm_and_find_vma(struct mm_struct *mm, + unsigned long address, struct pt_regs *regs); + #ifdef CONFIG_MMU extern vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address, unsigned int flags, @@ -2334,8 +2337,6 @@ void unmap_mapping_pages(struct address_space *mapping, pgoff_t start, pgoff_t nr, bool even_cows); void unmap_mapping_range(struct address_space *mapping, loff_t const holebegin, loff_t const holelen, int even_cows); -struct vm_area_struct *lock_mm_and_find_vma(struct mm_struct *mm, - unsigned long address, struct pt_regs *regs); #else static inline vm_fault_t handle_mm_fault(struct vm_area_struct *vma, unsigned long address, unsigned int flags, diff --git a/mm/nommu.c b/mm/nommu.c index 37d0b03143f1..fdc392735ec6 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -631,6 +631,17 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) EXPORT_SYMBOL(find_vma); /* + * At least xtensa ends up having protection faults even with no + * MMU.. No stack expansion, at least. + */ +struct vm_area_struct *lock_mm_and_find_vma(struct mm_struct *mm, + unsigned long addr, struct pt_regs *regs) +{ + mmap_read_lock(mm); + return vma_lookup(mm, addr); +} + +/* * expand a stack to a given address * - not supported under NOMMU conditions */ |