On Wed, Apr 7, 2021 at 2:21 PM Andrew Morton akpm@linux-foundation.org wrote:
On Wed, 7 Apr 2021 11:54:55 -0700 Nick Desaulniers ndesaulniers@google.com wrote:
LLVM changed the expected function signature for llvm_gcda_emit_function() in the clang-11 release. Users of clang-11 or newer may have noticed their kernels producing invalid coverage information:
$ llvm-cov gcov -a -c -u -f -b <input>.gcda -- gcno=<input>.gcno 1 <func>: checksum mismatch, \ (<lineno chksum A>, <cfg chksum B>) != (<lineno chksum A>, <cfg chksum C>) 2 Invalid .gcda File! ...
Fix up the function signatures so calling this function interprets its parameters correctly and computes the correct cfg checksum. In particular, in clang-11, the additional checksum is no longer optional.
Which tree is this against? I'm seeing quite a lot of rejects against Linus's current.
Today's linux-next; the only recent changes to this single source file since my last patches were:
commit b3c4e66c908b ("gcov: combine common code") commit 17d0508a080d ("gcov: use kvmalloc()")
both have your sign off, so I assume those are in your tree?