GCC reports:
In file included from hvm.c:24:0:
/local/xen.git/xen/include/xen/trace.h: In function ‘tb_control’:
/local/xen.git/xen/include/xen/trace.h:60:13: error: ‘ENOSYS’
undeclared (first use in this function)
return -ENOSYS;
^~~~~~
Include xen/errno.h to resolve the issue. While tweaking this, add comments
to the #else and #endif, as they are a fair distance apart.
Signed-off-by: Andrew Cooper <[email protected]>
---
CC: George Dunlap <[email protected]>
CC: Ian Jackson <[email protected]>
CC: Jan Beulich <[email protected]>
CC: Stefano Stabellini <[email protected]>
CC: Tim Deegan <[email protected]>
CC: Wei Liu <[email protected]>
CC: Julien Grall <[email protected]>
---
xen/include/xen/trace.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/xen/include/xen/trace.h b/xen/include/xen/trace.h
index fad92c784a..e6a4ef93cc 100644
--- a/xen/include/xen/trace.h
+++ b/xen/include/xen/trace.h
@@ -53,7 +53,10 @@ static inline void trace_var(u32 event, int cycles, int
extra,
void __trace_hypercall(uint32_t event, unsigned long op,
const xen_ulong_t *args);
-#else
+#else /* CONFIG_TRACEBUFFER */
+
+#include <xen/errno.h>
+
static inline void init_trace_bufs(void) {}
static inline int tb_control(struct xen_sysctl_tbuf_op *tbc)
{
@@ -71,7 +74,7 @@ static inline void __trace_var(uint32_t event, bool cycles,
unsigned int extra,
const void *extra_data) {}
static inline void __trace_hypercall(uint32_t event, unsigned long op,
const xen_ulong_t *args) {}
-#endif
+#endif /* CONFIG_TRACEBUFFER */
/* Convenience macros for calling the trace function. */
#define TRACE_0D(_e) \
--
2.11.0
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