From: Joe Fradley <joefradley@google.com>
Date: Tue, 22 Nov 2022 22:54:49 +0000 (-0800)
Subject: crypto: x86/curve25519 - disable gcov
X-Git-Tag: v6.2-rc1~87^2~46
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c390c452ebeb44cb979b7374d3acc3859415e86c;p=thirdparty%2Fkernel%2Flinux.git

crypto: x86/curve25519 - disable gcov

curve25519-x86_64.c fails to build when CONFIG_GCOV_KERNEL is enabled.
The error is "inline assembly requires more registers than available"
thrown from the `fsqr()` function. Therefore, excluding this file from
GCOV profiling until this issue is resolved. Thereby allowing
CONFIG_GCOV_PROFILE_ALL to be enabled for x86.

Signed-off-by: Joe Fradley <joefradley@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/arch/x86/crypto/Makefile b/arch/x86/crypto/Makefile
index 3b1d701a4f6c5..3e7a329235bdb 100644
--- a/arch/x86/crypto/Makefile
+++ b/arch/x86/crypto/Makefile
@@ -107,3 +107,6 @@ quiet_cmd_perlasm = PERLASM $@
       cmd_perlasm = $(PERL) $< > $@
 $(obj)/%.S: $(src)/%.pl FORCE
 	$(call if_changed,perlasm)
+
+# Disable GCOV in odd or sensitive code
+GCOV_PROFILE_curve25519-x86_64.o := n