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objtool, kcsan: Add volatile read/write instrumentation to whitelist 

Adds KCSAN's volatile instrumentation to objtool's uaccess whitelist.

Recent kernel change have shown that this was missing from the uaccess
whitelist (since the first upstreamed version of KCSAN):

  mm/gup.o: warning: objtool: fault_in_readable+0x101: call to __tsan_volatile_write1() with UACCESS enabled

Fixes: 75d75b7a4d ("kcsan: Support distinguishing volatile accesses")
Signed-off-by: Marco Elver <elver@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2022-09-12 11:45:41 +02:00 committed by Paul E. McKenney
parent 7c201739be
commit 63646fcba5
1 changed files with 10 additions and 0 deletions
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10
tools/objtool/check.c
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@ -999,6 +999,16 @@ static const char *uaccess_safe_builtin[] = {
"__tsan_read_write4",
"__tsan_read_write8",
"__tsan_read_write16",
"__tsan_volatile_read1",
"__tsan_volatile_read2",
"__tsan_volatile_read4",
"__tsan_volatile_read8",
"__tsan_volatile_read16",
"__tsan_volatile_write1",
"__tsan_volatile_write2",
"__tsan_volatile_write4",
"__tsan_volatile_write8",
"__tsan_volatile_write16",
"__tsan_atomic8_load",
"__tsan_atomic16_load",
"__tsan_atomic32_load",