diff options
Diffstat (limited to 'include/linux/mm_types.h')
-rw-r--r-- | include/linux/mm_types.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 1be91c585..9e324feff 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -342,7 +342,7 @@ struct vm_area_struct { /* Information about our backing store: */ unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE - units, *not* PAGE_CACHE_SIZE */ + units */ struct file * vm_file; /* File we map to (can be NULL). */ struct file *vm_prfile; /* shadow of vm_file */ void * vm_private_data; /* was vm_pte (shared mem) */ @@ -568,10 +568,26 @@ static inline void clear_tlb_flush_pending(struct mm_struct *mm) } #endif -struct vm_special_mapping -{ - const char *name; +struct vm_fault; + +struct vm_special_mapping { + const char *name; /* The name, e.g. "[vdso]". */ + + /* + * If .fault is not provided, this points to a + * NULL-terminated array of pages that back the special mapping. + * + * This must not be NULL unless .fault is provided. + */ struct page **pages; + + /* + * If non-NULL, then this is called to resolve page faults + * on the special mapping. If used, .pages is not checked. + */ + int (*fault)(const struct vm_special_mapping *sm, + struct vm_area_struct *vma, + struct vm_fault *vmf); }; enum tlb_flush_reason { |