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gcov: add support for GCC 5.1
Fix kernel gcov support for GCC 5.1. Similar to commit a992bf836f
("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@gmail.com>
Cc: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Yuan Pengfei <coolypf@qq.com>
Tested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -92,6 +92,12 @@ void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
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}
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EXPORT_SYMBOL(__gcov_merge_time_profile);
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void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
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{
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/* Unused. */
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}
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EXPORT_SYMBOL(__gcov_merge_icall_topn);
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/**
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* gcov_enable_events - enable event reporting through gcov_event()
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*
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@ -18,7 +18,9 @@
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#include <linux/vmalloc.h>
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#include "gcov.h"
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#if __GNUC__ == 4 && __GNUC_MINOR__ >= 9
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#if __GNUC__ == 5 && __GNUC_MINOR__ >= 1
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#define GCOV_COUNTERS 10
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#elif __GNUC__ == 4 && __GNUC_MINOR__ >= 9
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#define GCOV_COUNTERS 9
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#else
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#define GCOV_COUNTERS 8
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