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| author | Lorenzo Stoakes <lstoakes@gmail.com> | 2015-06-30 14:57:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-30 19:44:57 -0700 |
| commit | 3e44c471a2dab210f7e9b1e5f7d4d54d52df59eb (patch) | |
| tree | e3d413909c8a2c969b96a94243337fa0af51163c /kernel/gcov | |
| parent | 5375b708f2547f70cd2bee2fd8663ab7035f9551 (diff) | |
| download | lwn-3e44c471a2dab210f7e9b1e5f7d4d54d52df59eb.tar.gz lwn-3e44c471a2dab210f7e9b1e5f7d4d54d52df59eb.zip | |
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@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>
Diffstat (limited to 'kernel/gcov')
| -rw-r--r-- | kernel/gcov/base.c | 6 | ||||
| -rw-r--r-- | kernel/gcov/gcc_4_7.c | 4 |
2 files changed, 9 insertions, 1 deletions
diff --git a/kernel/gcov/base.c b/kernel/gcov/base.c index a744098e4eb7..7080ae1eb6c1 100644 --- a/kernel/gcov/base.c +++ b/kernel/gcov/base.c @@ -92,6 +92,12 @@ void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters) } 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 --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c index 826ba9fb5e32..e25e92fb44fa 100644 --- 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 |