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From: Miroslav Benes <mbenes@suse.cz>
To: keescook@chromium.org
Cc: linux@rasmusvillemoes.dk, luc.vanoostenryck@gmail.com,
	linux-kernel@vger.kernel.org, Miroslav Benes <mbenes@suse.cz>
Subject: [PATCH] compiler-gcc.h: don't set COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW for sparse
Date: Fri,  8 Jun 2018 08:34:41 +0200	[thread overview]
Message-ID: <20180608063441.8562-1-mbenes@suse.cz> (raw)
In-Reply-To: <CAGXu5j+XFR7BtYPU6G4CeLFREWevN+GC1FPX1hPAYA1LRBM9Bg@mail.gmail.com>

sparse errors out with

./include/linux/overflow.h:254:13: error: undefined identifier '__builtin_mul_overflow'
./include/linux/overflow.h:254:13: error: incorrect type in conditional
./include/linux/overflow.h:254:13:    got void
./include/linux/overflow.h:256:13: error: undefined identifier '__builtin_add_overflow'
./include/linux/overflow.h:256:13: error: incorrect type in conditional
./include/linux/overflow.h:256:13:    got void

Sparse has not acquired generic overflow builtins yet, so don't set
COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW for it.

Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
 include/linux/compiler-gcc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index f1a7492a5cc8..15e55b89e952 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -344,6 +344,6 @@
  */
 #define uninitialized_var(x) x = x
 
-#if GCC_VERSION >= 50100
+#if GCC_VERSION >= 50100 && !defined(__CHECKER__)
 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
 #endif
-- 
2.17.0

      parent reply	other threads:[~2018-06-08  6:34 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-07 11:01 sparse warnings in overflow.h Miroslav Benes
2018-06-07 18:35 ` Kees Cook
2018-06-07 19:25   ` Rasmus Villemoes
2018-06-07 23:45     ` Luc Van Oostenryck
2018-06-08  6:34   ` Miroslav Benes [this message]

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