[PATCH v11 2/7] userfaultfd: Define dummy uffd_wp_range()

From: Muhammad Usama Anjum <usama.anjum@collabora.com>
To: "Peter Xu" <peterx@redhat.com>,
	"David Hildenbrand" <david@redhat.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Michał Mirosław" <emmir@google.com>,
	"Andrei Vagin" <avagin@gmail.com>,
	"Danylo Mocherniuk" <mdanylo@google.com>,
	"Paul Gofman" <pgofman@codeweavers.com>,
	"Cyrill Gorcunov" <gorcunov@gmail.com>,
	"Mike Rapoport" <rppt@kernel.org>,
	"Nadav Amit" <namit@vmware.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
	Shuah Khan <shuah@kernel.org>,
	Christian Brauner <brauner@kernel.org>,
	Yang Shi <shy828301@gmail.com>, Vlastimil Babka <vbabka@suse.cz>,
	"Liam R . Howlett" <Liam.Howlett@Oracle.com>,
	Yun Zhou <yun.zhou@windriver.com>,
	Suren Baghdasaryan <surenb@google.com>,
	Alex Sierra <alex.sierra@amd.com>,
	Muhammad Usama Anjum <usama.anjum@collabora.com>,
	Matthew Wilcox <willy@infradead.org>,
	Pasha Tatashin <pasha.tatashin@soleen.com>,
	Axel Rasmussen <axelrasmussen@google.com>,
	"Gustavo A . R . Silva" <gustavoars@kernel.org>,
	Dan Williams <dan.j.williams@intel.com>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
	Greg KH <gregkh@linuxfoundation.org>,
	kernel@collabora.com
Subject: [PATCH v11 2/7] userfaultfd: Define dummy uffd_wp_range()
Date: Thu,  9 Mar 2023 18:57:13 +0500	[thread overview]
Message-ID: <20230309135718.1490461-3-usama.anjum@collabora.com> (raw)
In-Reply-To: <20230309135718.1490461-1-usama.anjum@collabora.com>

Define uffd_wp_range() for the cases when CONFIG_USERFAULTFD isn't set.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
 include/linux/userfaultfd_k.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index b680c0ec8b85..fd1a1ecdb5f6 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -182,6 +182,14 @@ extern int userfaultfd_wp_async(struct vm_area_struct *vma);
 
 #else /* CONFIG_USERFAULTFD */
 
+extern inline long uffd_wp_range(struct mm_struct *dst_mm,
+				 struct vm_area_struct *vma,
+				 unsigned long start, unsigned long len,
+				 bool enable_wp)
+{
+	return 0;
+}
+
 /* mm helpers */
 static inline vm_fault_t handle_userfault(struct vm_fault *vmf,
 				unsigned long reason)
-- 
2.39.2

