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authorJosh Poimboeuf <jpoimboe@redhat.com>2020-04-29 22:09:04 +0300
committerJosh Poimboeuf <jpoimboe@redhat.com>2020-05-20 16:30:43 +0300
commitae033f088f277efd5b3c6d681ce9e7682380efff (patch)
tree8de9341cdd012f0ac9117dcdd39b16900a02cb9e /tools/objtool
parent9d907f1ae80b8a67d5397e26912b9d56d0b70a02 (diff)
downloadlinux-ae033f088f277efd5b3c6d681ce9e7682380efff.tar.xz
objtool: Add check_kcov_mode() to the uaccess safelist
check_kcov_mode() is called by write_comp_data() and __sanitizer_cov_trace_pc(), which are already on the uaccess safe list. It's notrace and doesn't call out to anything else, so add it to the list too. This fixes the following warnings: kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0x15: call to check_kcov_mode() with UACCESS enabled kernel/kcov.o: warning: objtool: write_comp_data()+0x1b: call to check_kcov_mode() with UACCESS enabled Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to 'tools/objtool')
-rw-r--r--tools/objtool/check.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index e36a818a2fed..7a47ff9d39f7 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -507,6 +507,7 @@ static const char *uaccess_safe_builtin[] = {
"__asan_report_store16_noabort",
/* KCOV */
"write_comp_data",
+ "check_kcov_mode",
"__sanitizer_cov_trace_pc",
"__sanitizer_cov_trace_const_cmp1",
"__sanitizer_cov_trace_const_cmp2",