| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 1 Aug 2022 18:43:23 +0200
From: Hans-Christian Noren Egtvedt <hegtvedt@...co.com>
To: linux-kernel@...r.kernel.org
Cc: gregkh@...uxfoundation.org,
Christian Borntraeger <borntraeger@...ibm.com>,
Yury Norov <yury.norov@...il.com>,
Allison Randal <allison@...utok.net>,
Joe Perches <joe@...ches.com>,
Thomas Gleixner <tglx@...utronix.de>,
William Breathitt Gray <vilhelm.gray@...il.com>,
Torsten Hilbrich <torsten.hilbrich@...unet.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Hans-Christian Noren Egtvedt <hegtvedt@...co.com>
Subject: [v4.9 PATCH v2 1/6] include/uapi/linux/swab.h: fix userspace breakage, use __BITS_PER_LONG for swap
From: Christian Borntraeger <borntraeger@...ibm.com>
QEMU has a funny new build error message when I use the upstream kernel
headers:
CC block/file-posix.o
In file included from /home/cborntra/REPOS/qemu/include/qemu/timer.h:4,
from /home/cborntra/REPOS/qemu/include/qemu/timed-average.h:29,
from /home/cborntra/REPOS/qemu/include/block/accounting.h:28,
from /home/cborntra/REPOS/qemu/include/block/block_int.h:27,
from /home/cborntra/REPOS/qemu/block/file-posix.c:30:
/usr/include/linux/swab.h: In function `__swab':
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:34: error: "sizeof" is not defined, evaluates to 0 [-Werror=undef]
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^~~~~~
/home/cborntra/REPOS/qemu/include/qemu/bitops.h:20:41: error: missing binary operator before token "("
20 | #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
| ^
cc1: all warnings being treated as errors
make: *** [/home/cborntra/REPOS/qemu/rules.mak:69: block/file-posix.o] Error 1
rm tests/qemu-iotests/socket_scm_helper.o
This was triggered by commit d5767057c9a ("uapi: rename ext2_swab() to
swab() and share globally in swab.h"). That patch is doing
#include <asm/bitsperlong.h>
but it uses BITS_PER_LONG.
The kernel file asm/bitsperlong.h provide only __BITS_PER_LONG.
Let us use the __ variant in swap.h
Link: http://lkml.kernel.org/r/20200213142147.17604-1-borntraeger@de.ibm.com
Fixes: d5767057c9a ("uapi: rename ext2_swab() to swab() and share globally in swab.h")
Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
Cc: Yury Norov <yury.norov@...il.com>
Cc: Allison Randal <allison@...utok.net>
Cc: Joe Perches <joe@...ches.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: William Breathitt Gray <vilhelm.gray@...il.com>
Cc: Torsten Hilbrich <torsten.hilbrich@...unet.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
(cherry picked from commit 467d12f5c7842896d2de3ced74e4147ee29e97c8)
Signed-off-by: Hans-Christian Noren Egtvedt <hegtvedt@...co.com>
---
include/uapi/linux/swab.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/swab.h b/include/uapi/linux/swab.h
index 1f42d110987..51502eabdb0 100644
--- a/include/uapi/linux/swab.h
+++ b/include/uapi/linux/swab.h
@@ -134,9 +134,9 @@ static inline __attribute_const__ __u32 __fswahb32(__u32 val)
static __always_inline unsigned long __swab(const unsigned long y)
{
-#if BITS_PER_LONG == 64
+#if __BITS_PER_LONG == 64
return __swab64(y);
-#else /* BITS_PER_LONG == 32 */
+#else /* __BITS_PER_LONG == 32 */
return __swab32(y);
#endif
}
--
2.34.1
Powered by blists - more mailing lists