teach shmem_get_link() to work in RCU mode (6a6c9904) · Commits · e / devices / android_kernel_fairphone_FP3

mm/shmem.c

+14 −6

Original line number	Diff line number	Diff line
		@@ -2501,12 +2501,20 @@ static const char shmem_get_link(struct dentry dentry,
		{
		struct page *page = NULL;
		int error;
		if (!dentry)
		if (!dentry) {
		page = find_get_page(inode->i_mapping, 0);
		if (!page)
		return ERR_PTR(-ECHILD);
		if (!PageUptodate(page)) {
		put_page(page);
		return ERR_PTR(-ECHILD);
		}
		} else {
		error = shmem_getpage(inode, 0, &page, SGP_READ, NULL);
		if (error)
		return ERR_PTR(error);
		unlock_page(page);
		}
		*cookie = page;
		return page_address(page);
		}