Commit 63646fcb authored by Marco Elver's avatar Marco Elver Committed by Paul E. McKenney
Browse files

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: 75d75b7a ("kcsan: Support distinguishing volatile accesses")
Signed-off-by: default avatarMarco Elver <elver@google.com>
Reviewed-by: default avatarDmitry Vyukov <dvyukov@google.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 7c201739

tools/objtool/check.c

+10 −0
Original line number Diff line number Diff line
@@ -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",