diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index c11418dd94e..b5346576e58 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -37,6 +37,10 @@ #include <asm/uaccess.h> #include <asm/mman.h> +static ssize_t +generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, + loff_t offset, unsigned long nr_segs); + /* * Shared mappings implemented 30.11.1994. It's not fully working yet, * though. @@ -54,9 +58,8 @@ * * ->i_mmap_lock (vmtruncate) * ->private_lock (__free_pte->__set_page_dirty_buffers) - * ->swap_list_lock - * ->swap_device_lock (exclusive_swap_page, others) - * ->mapping->tree_lock + * ->swap_lock (exclusive_swap_page, others) + * ->mapping->tree_lock * * ->i_sem * ->i_mmap_lock (truncate->unmap_mapping_range) @@ -86,7 +89,7 @@ * ->page_table_lock (anon_vma_prepare and various) * * ->page_table_lock - * ->swap_device_lock (try_to_unmap_one) + * ->swap_lock (try_to_unmap_one) * ->private_lock (try_to_unmap_one) * ->tree_lock (try_to_unmap_one) * ->zone.lru_lock (follow_page->mark_page_accessed) @@ -302,8 +305,9 @@ EXPORT_SYMBOL(sync_page_range); * as it forces O_SYNC writers to different parts of the same file * to be serialised right until io completion. */ -int sync_page_range_nolock(struct inode *inode, struct address_space *mapping, - loff_t pos, size_t count) +static int sync_page_range_nolock(struct inode *inode, + struct address_space *mapping, + loff_t pos, size_t count) { pgoff_t start = pos >> PAGE_CACHE_SHIFT; pgoff_t end = (pos + count - 1) >> PAGE_CACHE_SHIFT; @@ -318,7 +322,6 @@ int sync_page_range_nolock(struct inode *inode, struct address_space *mapping, ret = wait_on_page_writeback_range(mapping, start, end); return ret; } -EXPORT_SYMBOL(sync_page_range_nolock); /** * filemap_fdatawait - walk the list of under-writeback pages of the given @@ -1505,8 +1508,12 @@ repeat: return -EINVAL; page = filemap_getpage(file, pgoff, nonblock); + + /* XXX: This is wrong, a filesystem I/O error may have happened. Fix that as + * done in shmem_populate calling shmem_getpage */ if (!page && !nonblock) return -ENOMEM; + if (page) { err = install_page(mm, vma, addr, page, prot); if (err) { @@ -1514,6 +1521,9 @@ repeat: return err; } } else { + /* No page was found just because we can't read it in now (being + * here implies nonblock != 0), but the page may exist, so set + * the PTE to fault it in later. */ err = install_file_pte(mm, vma, addr, pgoff, prot); if (err) return err; @@ -2002,7 +2012,7 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov, } EXPORT_SYMBOL(generic_file_buffered_write); -ssize_t +static ssize_t __generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t *ppos) { @@ -2102,7 +2112,7 @@ generic_file_aio_write_nolock(struct kiocb *iocb, const struct iovec *iov, return ret; } -ssize_t +static ssize_t __generic_file_write_nolock(struct file *file, const struct iovec *iov, unsigned long nr_segs, loff_t *ppos) { @@ -2223,7 +2233,7 @@ EXPORT_SYMBOL(generic_file_writev); * Called under i_sem for writes to S_ISREG files. Returns -EIO if something * went wrong during pagecache shootdown. */ -ssize_t +static ssize_t generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) { @@ -2258,4 +2268,3 @@ generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, } return retval; } -EXPORT_SYMBOL_GPL(generic_file_direct_IO); |