I stole the printk_once() macro.
I always wanted to be able to print some error directly if there is a
buffer to dump, however we can't use error_report() really quite often
when there can be any DDOS attack. To avoid that, we can introduce a
print-once function for it.
CC: Markus Armbruster <address@hidden>
Signed-off-by: Peter Xu <address@hidden>
---
We can for sure introduce similar functions for the rest of the
error_*() functions, it's just an idea to see whether we'd like it
in general.
---
include/qemu/error-report.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/qemu/error-report.h b/include/qemu/error-report.h
index e1c8ae1a52..efebb80e2c 100644
--- a/include/qemu/error-report.h
+++ b/include/qemu/error-report.h
@@ -44,6 +44,18 @@ void error_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
void warn_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
void info_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
+#define error_report_once(fmt, ...) \
+ ({ \
+ static bool __print_once; \