The patch titled
Subject: gcov: add support for GCC 5.1
has been added to the -mm tree. Its filename is
gcov-add-support-for-gcc-51.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/gcov-add-support-for-gcc-51.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/gcov-add-support-for-gcc-51.patch
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------------------------------------------------------
From: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Subject: gcov: add support for GCC 5.1
Fix kernel gcov support for GCC 5.1. Similar to commit a992bf836f9
("gcov: add support for GCC 4.9"), this patch takes into account the
existence of a new gcov counter (see gcc's gcc/gcov-counter.def.)
Firstly, it increments GCOV_COUNTERS (to 10), which makes the data
structure struct gcov_info compatible with GCC 5.1.
Secondly, a corresponding counter function __gcov_merge_icall_topn (Top N
value tracking for indirect calls) is included in base.c with the other
gcov counters unused for kernel profiling.
Signed-off-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Cc: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Cc: Yuan Pengfei <coolypf@xxxxxx>
Cc: Peter Oberparleiter <oberpar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/gcov/base.c | 6 ++++++
kernel/gcov/gcc_4_7.c | 4 +++-
2 files changed, 9 insertions(+), 1 deletion(-)
diff -puN kernel/gcov/base.c~gcov-add-support-for-gcc-51 kernel/gcov/base.c
--- a/kernel/gcov/base.c~gcov-add-support-for-gcc-51
+++ a/kernel/gcov/base.c
@@ -92,6 +92,12 @@ void __gcov_merge_time_profile(gcov_type
}
EXPORT_SYMBOL(__gcov_merge_time_profile);
+void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
+{
+ /* Unused. */
+}
+EXPORT_SYMBOL(__gcov_merge_icall_topn);
+
/**
* gcov_enable_events - enable event reporting through gcov_event()
*
diff -puN kernel/gcov/gcc_4_7.c~gcov-add-support-for-gcc-51 kernel/gcov/gcc_4_7.c
--- a/kernel/gcov/gcc_4_7.c~gcov-add-support-for-gcc-51
+++ a/kernel/gcov/gcc_4_7.c
@@ -18,7 +18,9 @@
#include <linux/vmalloc.h>
#include "gcov.h"
-#if __GNUC__ == 4 && __GNUC_MINOR__ >= 9
+#if __GNUC__ == 5 && __GNUC_MINOR__ >= 1
+#define GCOV_COUNTERS 10
+#elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
#define GCOV_COUNTERS 9
#else
#define GCOV_COUNTERS 8
_
Patches currently in -mm which might be from lstoakes@xxxxxxxxx are
gcov-add-support-for-gcc-51.patch
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