[PATCH 19/36] xen/console: introduce printk_common()

[Denis Mukhin via B4 Relay <devnull+dmukhin.ford.com@xxxxxxxxxx>]

From: Denis Mukhin <dmukhin@xxxxxxxx>

Introduce new printk() variant for convenient printouts which skip '(XEN)'
prefix on xen console. This is needed for the case when physical console is
owned by a domain w/ in-hypervisor UART emulation enabled.

Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
---
 xen/drivers/char/console.c | 8 ++++++++
 xen/include/xen/lib.h      | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/xen/drivers/char/console.c b/xen/drivers/char/console.c
index 
86bf899ada8f8221ffc77bcffb1f58777a22198e..f034ce5aab3f3bf59b0df9fa583ee9ce32dbf665
 100644
--- a/xen/drivers/char/console.c
+++ b/xen/drivers/char/console.c
@@ -968,6 +968,14 @@ void printk(const char *fmt, ...)
     va_end(args);
 }
 
+void printk_common(const char *fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    vprintk_common("", fmt, args);
+    va_end(args);
+}
+
 void guest_printk(const struct domain *d, const char *fmt, ...)
 {
     va_list args;
diff --git a/xen/include/xen/lib.h b/xen/include/xen/lib.h
index 
81b722ea3e801e9089aaf8758249feb3a758c4f7..8a7ff2e8af9089796ff28ef8d01c00e9845782ca
 100644
--- a/xen/include/xen/lib.h
+++ b/xen/include/xen/lib.h
@@ -61,6 +61,9 @@ debugtrace_printk(const char *fmt, ...) {}
 extern void printk(const char *fmt, ...)
     __attribute__ ((format (printf, 1, 2), cold));
 
+extern void printk_common(const char *fmt, ...)
+    __attribute__ ((format (printf, 1, 2)));
+
 #define printk_once(fmt, args...)               \
 ({                                              \
     static bool __read_mostly once_;            \

-- 
2.34.1