diff options
| -rw-r--r-- | fs/cachefiles/rdwr.c | 48 | ||||
| -rw-r--r-- | fs/read_write.c | 2 |
2 files changed, 21 insertions, 29 deletions
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c index 25e745b8eb1b..616db0e77b44 100644 --- a/fs/cachefiles/rdwr.c +++ b/fs/cachefiles/rdwr.c @@ -880,7 +880,6 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page) { struct cachefiles_object *object; struct cachefiles_cache *cache; - mm_segment_t old_fs; struct file *file; struct path path; loff_t pos, eof; @@ -914,36 +913,27 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page) if (IS_ERR(file)) { ret = PTR_ERR(file); } else { - ret = -EIO; - if (file->f_op->write) { - pos = (loff_t) page->index << PAGE_SHIFT; - - /* we mustn't write more data than we have, so we have - * to beware of a partial page at EOF */ - eof = object->fscache.store_limit_l; - len = PAGE_SIZE; - if (eof & ~PAGE_MASK) { - ASSERTCMP(pos, <, eof); - if (eof - pos < PAGE_SIZE) { - _debug("cut short %llx to %llx", - pos, eof); - len = eof - pos; - ASSERTCMP(pos + len, ==, eof); - } + pos = (loff_t) page->index << PAGE_SHIFT; + + /* we mustn't write more data than we have, so we have + * to beware of a partial page at EOF */ + eof = object->fscache.store_limit_l; + len = PAGE_SIZE; + if (eof & ~PAGE_MASK) { + ASSERTCMP(pos, <, eof); + if (eof - pos < PAGE_SIZE) { + _debug("cut short %llx to %llx", + pos, eof); + len = eof - pos; + ASSERTCMP(pos + len, ==, eof); } - - data = kmap(page); - file_start_write(file); - old_fs = get_fs(); - set_fs(KERNEL_DS); - ret = file->f_op->write( - file, (const void __user *) data, len, &pos); - set_fs(old_fs); - kunmap(page); - file_end_write(file); - if (ret != len) - ret = -EIO; } + + data = kmap(page); + ret = __kernel_write(file, data, len, &pos); + kunmap(page); + if (ret != len) + ret = -EIO; fput(file); } diff --git a/fs/read_write.c b/fs/read_write.c index 009d8542a889..7d9318c3d43c 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -513,6 +513,8 @@ ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t return ret; } +EXPORT_SYMBOL(__kernel_write); + ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_t *pos) { ssize_t ret; |