force_page_cache_readahead() may fail, so need let the related upper system calls know about it by its return value. For system call fadvise64_64(), ignore return value because fadvise() shall return success even if filesystem can't retrieve a hint. Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx> --- mm/madvise.c | 4 ++-- mm/readahead.c | 3 +-- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 936799f..3d0d484 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -247,8 +247,8 @@ static long madvise_willneed(struct vm_area_struct *vma, end = vma->vm_end; end = ((end - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; - force_page_cache_readahead(file->f_mapping, file, start, end - start); - return 0; + return force_page_cache_readahead(file->f_mapping, file, + start, end - start); } /* diff --git a/mm/readahead.c b/mm/readahead.c index e4ed041..1b21b5c 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -572,8 +572,7 @@ do_readahead(struct address_space *mapping, struct file *filp, if (!mapping || !mapping->a_ops || !mapping->a_ops->readpage) return -EINVAL; - force_page_cache_readahead(mapping, filp, index, nr); - return 0; + return force_page_cache_readahead(mapping, filp, index, nr); } SYSCALL_DEFINE3(readahead, int, fd, loff_t, offset, size_t, count) -- 1.7.7.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>