This is a pre-requisite for enabling bitops instrumentation. Some bitops may safely be used with instrumentation in uaccess regions.
For example, on x86, `test_bit` is used to test a CPU-feature in a uaccess region: arch/x86/ia32/ia32_signal.c:361 Signed-off-by: Marco Elver <[email protected]> --- tools/objtool/check.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 172f99195726..eff0e5209402 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -443,6 +443,8 @@ static void add_ignores(struct objtool_file *file) static const char *uaccess_safe_builtin[] = { /* KASAN */ "kasan_report", + "kasan_check_read", + "kasan_check_write", "check_memory_region", /* KASAN out-of-line */ "__asan_loadN_noabort", -- 2.22.0.rc1.257.g3120a18244-goog
