diff options
Diffstat (limited to '')
| -rw-r--r-- | mm/memory.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/mm/memory.c b/mm/memory.c index 557c6fffedd1..706c4c4a2b8e 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1504,6 +1504,8 @@ out: * under mm->mmap_sem write-lock, so it can change vma->vm_flags. * Caller must set VM_MIXEDMAP on vma if it wants to call this * function from other places, for example from page-fault handler. + * + * Return: %0 on success, negative error code otherwise. */ int vm_insert_page(struct vm_area_struct *vma, unsigned long addr, struct page *page) @@ -1831,7 +1833,9 @@ static inline int remap_p4d_range(struct mm_struct *mm, pgd_t *pgd, * @size: size of map area * @prot: page protection flags for this mapping * - * Note: this is only safe if the mm semaphore is held when called. + * Note: this is only safe if the mm semaphore is held when called. + * + * Return: %0 on success, negative error code otherwise. */ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, unsigned long size, pgprot_t prot) @@ -1904,6 +1908,8 @@ EXPORT_SYMBOL(remap_pfn_range); * * NOTE! Some drivers might want to tweak vma->vm_page_prot first to get * whatever write-combining details or similar. + * + * Return: %0 on success, negative error code otherwise. */ int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len) { @@ -2382,12 +2388,13 @@ oom: * * This function handles all that is needed to finish a write page fault in a * shared mapping due to PTE being read-only once the mapped page is prepared. - * It handles locking of PTE and modifying it. The function returns - * VM_FAULT_WRITE on success, 0 when PTE got changed before we acquired PTE - * lock. + * It handles locking of PTE and modifying it. * * The function expects the page to be locked or other protection against * concurrent faults / writeback (such as DAX radix tree locks). + * + * Return: %VM_FAULT_WRITE on success, %0 when PTE got changed before + * we acquired PTE lock. */ vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf) { @@ -3214,6 +3221,8 @@ static vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) * * Target users are page handler itself and implementations of * vm_ops->map_pages. + * + * Return: %0 on success, %VM_FAULT_ code in case of error. */ vm_fault_t alloc_set_pte(struct vm_fault *vmf, struct mem_cgroup *memcg, struct page *page) @@ -3274,11 +3283,12 @@ vm_fault_t alloc_set_pte(struct vm_fault *vmf, struct mem_cgroup *memcg, * This function handles all that is needed to finish a page fault once the * page to fault in is prepared. It handles locking of PTEs, inserts PTE for * given page, adds reverse page mapping, handles memcg charges and LRU - * addition. The function returns 0 on success, VM_FAULT_ code in case of - * error. + * addition. * * The function expects the page to be locked and on success it consumes a * reference of a page being mapped (for the PTE which maps it). + * + * Return: %0 on success, %VM_FAULT_ code in case of error. */ vm_fault_t finish_fault(struct vm_fault *vmf) { @@ -4159,7 +4169,7 @@ EXPORT_SYMBOL(follow_pte_pmd); * * Only IO mappings and raw PFN mappings are allowed. * - * Returns zero and the pfn at @pfn on success, -ve otherwise. + * Return: zero and the pfn at @pfn on success, -ve otherwise. */ int follow_pfn(struct vm_area_struct *vma, unsigned long address, unsigned long *pfn) @@ -4309,6 +4319,8 @@ int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm, * @gup_flags: flags modifying lookup behaviour * * The caller must hold a reference on @mm. + * + * Return: number of bytes copied from source to destination. */ int access_remote_vm(struct mm_struct *mm, unsigned long addr, void *buf, int len, unsigned int gup_flags) |