gcov: support GCC 7.1

Starting from GCC 7.1, __gcov_exit is a new symbol expected to be implemented in a profiling runtime. [[email protected]: coding-style fixes] [[email protected]: v2] Link: http:https://lkml.kernel.org/r/[email protected] Link: http:https://lkml.kernel.org/r/[email protected] Signed-off-by: Martin Liska <[email protected]> Acked-by: Peter Oberparleiter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
torvalds · May 12, 2017 · 0538421 · 0538421
1 parent 8d35bb3
commit 0538421
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/kernel/gcov/base.c b/kernel/gcov/base.c
@@ -98,6 +98,12 @@ void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
 }
 EXPORT_SYMBOL(__gcov_merge_icall_topn);
 
+void __gcov_exit(void)
+{
+ /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_exit);
+
 /**
  * gcov_enable_events - enable event reporting through gcov_event()
  *

diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
@@ -18,7 +18,9 @@
 #include <linux/vmalloc.h>
 #include "gcov.h"
 
-#if (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
+#if (__GNUC__ >= 7)
+#define GCOV_COUNTERS 9
+#elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
 #define GCOV_COUNTERS 10
 #elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
 #define GCOV_COUNTERS 9