[lttng-dev] [PATCH lttng-modules v2] Fix: changes to the vm_op fault cb prototype in libringbuffer

[Francis Deslauriers]

Signed-off-by: Francis Deslauriers <francis.deslauriers at efficios.com>
---
 lib/ringbuffer/ring_buffer_mmap.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/ringbuffer/ring_buffer_mmap.c b/lib/ringbuffer/ring_buffer_mmap.c
index 35d30e7..4b1b7b3 100644
--- a/lib/ringbuffer/ring_buffer_mmap.c
+++ b/lib/ringbuffer/ring_buffer_mmap.c
@@ -32,7 +32,7 @@
 /*
  * fault() vm_op implementation for ring buffer file mapping.
  */
-static int lib_ring_buffer_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+static int lib_ring_buffer_fault_compat(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct lib_ring_buffer *buf = vma->vm_private_data;
 	struct channel *chan = buf->backend.chan;
@@ -65,6 +65,19 @@ static int lib_ring_buffer_fault(struct vm_area_struct *vma, struct vm_fault *vm
 	return 0;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0))
+static int lib_ring_buffer_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	return lib_ring_buffer_fault_compat(vma, vmf);
+}
+#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
+static int lib_ring_buffer_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	return lib_ring_buffer_fault_compat(vma, vmf);
+}
+#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0)) */
+
 /*
  * vm_ops for ring buffer file mappings.
  */
-- 
2.7.4