diff options
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 79c4b2b..64b48f9 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -29,7 +29,6 @@ #include <linux/pagevec.h> #include <linux/blkdev.h> #include <linux/security.h> -#include <linux/syscalls.h> #include <linux/cpuset.h> #include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */ #include <linux/memcontrol.h> @@ -1478,44 +1477,6 @@ out: } EXPORT_SYMBOL(generic_file_aio_read); -static ssize_t -do_readahead(struct address_space *mapping, struct file *filp, - pgoff_t index, unsigned long nr) -{ - if (!mapping || !mapping->a_ops || !mapping->a_ops->readpage) - return -EINVAL; - - force_page_cache_readahead(mapping, filp, index, nr); - return 0; -} - -SYSCALL_DEFINE(readahead)(int fd, loff_t offset, size_t count) -{ - ssize_t ret; - struct file *file; - - ret = -EBADF; - file = fget(fd); - if (file) { - if (file->f_mode & FMODE_READ) { - struct address_space *mapping = file->f_mapping; - pgoff_t start = offset >> PAGE_CACHE_SHIFT; - pgoff_t end = (offset + count - 1) >> PAGE_CACHE_SHIFT; - unsigned long len = end - start + 1; - ret = do_readahead(mapping, file, start, len); - } - fput(file); - } - return ret; -} -#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS -asmlinkage long SyS_readahead(long fd, loff_t offset, long count) -{ - return SYSC_readahead((int) fd, offset, (size_t) count); -} -SYSCALL_ALIAS(sys_readahead, SyS_readahead); -#endif - #ifdef CONFIG_MMU /** * page_cache_read - adds requested page to the page cache if not already there |
