gcov: add support for checksum field

In GCC version 12.1 a checksum field was added. This patch fixes a kernel crash occurring during boot when using gcov-kernel with GCC version 12.2. The crash occurred on a system running on i.MX6SX. Link: https://lkml.kernel.org/r/[email protected] Fixes: 977ef30 ("gcov: support GCC 12.1 and newer compilers") Signed-off-by: Rickard x Andersson <[email protected]> Reviewed-by: Peter Oberparleiter <[email protected]> Tested-by: Peter Oberparleiter <[email protected]> Reviewed-by: Martin Liska <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
torvalds · Dec 21, 2022 · e96b95c · e96b95c
1 parent c5651b3
commit e96b95c
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
@@ -82,6 +82,7 @@ struct gcov_fn_info {
  * @version: gcov version magic indicating the gcc version used for compilation
  * @next: list head for a singly-linked list
  * @stamp: uniquifying time stamp
+ * @checksum: unique object checksum
  * @filename: name of the associated gcov data file
  * @merge: merge functions (null for unused counter type)
  * @n_functions: number of instrumented functions
@@ -94,6 +95,10 @@ struct gcov_info {
  unsigned int version;
  struct gcov_info *next;
  unsigned int stamp;
+ /* Since GCC 12.1 a checksum field is added. */
+#if (__GNUC__ >= 12)
+ unsigned int checksum;
+#endif
  const char *filename;
  void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int);
  unsigned int n_functions;