[PATCH 01/25 v6] xen/arm: vpl011: Define common ring buffer helper functions in console.h

[Bhupinder Thakur <bhupinder.thakur@linaro.org>]

DEFINE_XEN_FLEX_RING(xencons) defines common helper functions such as
xencons_queued() to tell the current size of the ring buffer,
xencons_mask() to mask off the index, which are useful helper functions.
pl011 emulation code will use these helper functions.

io/console.h includes io/ring.h which defines DEFINE_XEN_FLEX_RING.

In console/daemon/io.c, string.h had to be included before io/console.h
because ring.h uses string functions.

Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
CC: Ian Jackson <ian.jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Stefano Stabellini <sstabellini@kernel.org>
CC: Julien Grall <julien.grall@arm.com>

Changes since v4:
- Split this change in a separate patch.

 tools/console/daemon/io.c       | 2 +-
 xen/include/public/io/console.h | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/console/daemon/io.c b/tools/console/daemon/io.c
index 7e474bb..e8033d2 100644
--- a/tools/console/daemon/io.c
+++ b/tools/console/daemon/io.c
@@ -21,6 +21,7 @@
 
 #include "utils.h"
 #include "io.h"
+#include <string.h>
 #include <xenevtchn.h>
 #include <xengnttab.h>
 #include <xenstore.h>
@@ -29,7 +30,6 @@
 
 #include <stdlib.h>
 #include <errno.h>
-#include <string.h>
 #include <poll.h>
 #include <fcntl.h>
 #include <unistd.h>
diff --git a/xen/include/public/io/console.h b/xen/include/public/io/console.h
index e2cd97f..5e45e1c 100644
--- a/xen/include/public/io/console.h
+++ b/xen/include/public/io/console.h
@@ -27,6 +27,8 @@
 #ifndef __XEN_PUBLIC_IO_CONSOLE_H__
 #define __XEN_PUBLIC_IO_CONSOLE_H__
 
+#include "ring.h"
+
 typedef uint32_t XENCONS_RING_IDX;
 
 #define MASK_XENCONS_IDX(idx, ring) ((idx) & (sizeof(ring)-1))
@@ -38,6 +40,8 @@ struct xencons_interface {
     XENCONS_RING_IDX out_cons, out_prod;
 };
 
+DEFINE_XEN_FLEX_RING(xencons);
+
 #endif /* __XEN_PUBLIC_IO_CONSOLE_H__ */
 
 /*
-- 
2.7.4


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