3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lorenzo Stoakes <lstoakes@xxxxxxxxx> commit 3e44c471a2dab210f7e9b1e5f7d4d54d52df59eb upstream. 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> Tested-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxxxxxxx> Reviewed-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/gcov/base.c | 6 ++++++ kernel/gcov/gcc_4_7.c | 4 +++- 2 files changed, 9 insertions(+), 1 deletion(-) --- a/kernel/gcov/base.c +++ b/kernel/gcov/base.c @@ -91,6 +91,12 @@ 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() * --- 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__ == 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