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Subject[PATCH v2 1/4] xenbus: prefer xenbus_scanf() over xenbus_gather()
For single items being collected this should be preferred as being more
typesafe (as the compiler can check format string and to-be-written-to
variable match) and more efficient (requiring one less parameter to be
passed).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
v2: Avoid commit message to continue from subject.
---
drivers/xen/xenbus/xenbus_client.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- 4.7-rc6-prefer-xenbus_scanf.orig/drivers/xen/xenbus/xenbus_client.c
+++ 4.7-rc6-prefer-xenbus_scanf/drivers/xen/xenbus/xenbus_client.c
@@ -926,9 +926,9 @@ EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
*/
enum xenbus_state xenbus_read_driver_state(const char *path)
{
- enum xenbus_state result;
- int err = xenbus_gather(XBT_NIL, path, "state", "%d", &result, NULL);
- if (err)
+ int result;
+
+ if (xenbus_scanf(XBT_NIL, path, "state", "%d", &result) != 1)
result = XenbusStateUnknown;

return result;


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