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gcov: add support for GCC 15

Using gcov on kernels compiled with GCC 15 results in truncated 16-byte
long .gcda files with no usable data. To fix this, update GCOV_COUNTERS
to match the value defined by GCC 15.

Tested with GCC 14.3.0 and GCC 15.2.0.

Link: https://lkml.kernel.org/r/20251028115125.1319410-1-oberpar@linux.ibm.com
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reported-by: Matthieu Baerts <matttbe@kernel.org>
Closes: https://github.com/linux-test-project/lcov/issues/445
Tested-by: Matthieu Baerts <matttbe@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

Peter Oberparleiter and committed by
Andrew Morton ec4d11fc 0d6c356d

+3 -1
+3 -1
kernel/gcov/gcc_4_7.c
··· 18 18 #include <linux/mm.h> 19 19 #include "gcov.h" 20 20 21 - #if (__GNUC__ >= 14) 21 + #if (__GNUC__ >= 15) 22 + #define GCOV_COUNTERS 10 23 + #elif (__GNUC__ >= 14) 22 24 #define GCOV_COUNTERS 9 23 25 #elif (__GNUC__ >= 10) 24 26 #define GCOV_COUNTERS 8