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From: Al Viro <viro@ZenIV.linux.org.uk>
To: David Howells <dhowells@redhat.com>
Cc: linux-api@vger.kernel.org, linux-kbuild@vger.kernel.org,
	Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>,
	linux-nilfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 07/11] UAPI: nilfs2: Fix use of undefined byteswapping functions
Date: Wed, 5 Sep 2018 23:20:05 +0100	[thread overview]
Message-ID: <20180905222005.GS19965@ZenIV.linux.org.uk> (raw)
In-Reply-To: <153616292366.23468.14988166998690800938.stgit@warthog.procyon.org.uk>

On Wed, Sep 05, 2018 at 04:55:23PM +0100, David Howells wrote:
>  nilfs_checkpoint_set_##name(struct nilfs_checkpoint *cp)		\
>  {									\
> -	cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) |		\
> +	cp->cp_flags = __cpu_to_le32(__le32_to_cpu(cp->cp_flags) |	\
>  				   (1UL << NILFS_CHECKPOINT_##flag));	\

How about sanitiziung the damn thing to
	cp->cp_flags |= __cpu_to_le32(1UL << NILFS_CHECKPOINT_##flag));

while you are at it?  Or, perhaps, even
#define NILFS2_CP_FLAG(flag) __cpu_to_le32(1UL << NILFS_CHECKPOINT_##flag)

and cp->cp_flags |= NILFS2_CP_FLAG(flag) for this one,

>  }									\
>  static inline void							\
>  nilfs_checkpoint_clear_##name(struct nilfs_checkpoint *cp)		\
>  {									\
> -	cp->cp_flags = cpu_to_le32(le32_to_cpu(cp->cp_flags) &		\
> +	cp->cp_flags = __cpu_to_le32(__le32_to_cpu(cp->cp_flags) &	\
>  				   ~(1UL << NILFS_CHECKPOINT_##flag));	\
	cp->cp_flags &= ~NILFS2_CP_FLAG(flag);
here

>  }									\
>  static inline int							\
>  nilfs_checkpoint_##name(const struct nilfs_checkpoint *cp)		\
>  {									\
> -	return !!(le32_to_cpu(cp->cp_flags) &				\
> +	return !!(__le32_to_cpu(cp->cp_flags) &				\
>  		  (1UL << NILFS_CHECKPOINT_##flag));			\

and !!(cp->cp_flags & NILFS2_CP_FLAG(flag)
here?  Or maybe even make the damn thing bool and lose the !! here...

)>  }
>  

and similar for those:

> @@ -595,20 +596,20 @@ enum {
>  static inline void							\
>  nilfs_segment_usage_set_##name(struct nilfs_segment_usage *su)		\
>  {									\
> -	su->su_flags = cpu_to_le32(le32_to_cpu(su->su_flags) |		\
> +	su->su_flags = __cpu_to_le32(__le32_to_cpu(su->su_flags) |	\
>  				   (1UL << NILFS_SEGMENT_USAGE_##flag));\
>  }									\
>  static inline void							\
>  nilfs_segment_usage_clear_##name(struct nilfs_segment_usage *su)	\
>  {									\
>  	su->su_flags =							\
> -		cpu_to_le32(le32_to_cpu(su->su_flags) &			\
> +		__cpu_to_le32(__le32_to_cpu(su->su_flags) &		\
>  			    ~(1UL << NILFS_SEGMENT_USAGE_##flag));      \
>  }									\
>  static inline int							\
>  nilfs_segment_usage_##name(const struct nilfs_segment_usage *su)	\
>  {									\
> -	return !!(le32_to_cpu(su->su_flags) &				\
> +	return !!(__le32_to_cpu(su->su_flags) &				\
>  		  (1UL << NILFS_SEGMENT_USAGE_##flag));			\
>  }



> @@ -619,15 +620,15 @@ NILFS_SEGMENT_USAGE_FNS(ERROR, error)
>  static inline void
>  nilfs_segment_usage_set_clean(struct nilfs_segment_usage *su)
>  {
> -	su->su_lastmod = cpu_to_le64(0);
> -	su->su_nblocks = cpu_to_le32(0);
> -	su->su_flags = cpu_to_le32(0);
> +	su->su_lastmod = __cpu_to_le64(0);
> +	su->su_nblocks = __cpu_to_le32(0);
> +	su->su_flags = __cpu_to_le32(0);
>  }
>  
>  static inline int
>  nilfs_segment_usage_clean(const struct nilfs_segment_usage *su)
>  {
> -	return !le32_to_cpu(su->su_flags);
> +	return !__le32_to_cpu(su->su_flags);

"Check that after byteswap it becomes 0", is it?  How is that different
from return !su->su_flags; ?

  reply	other threads:[~2018-09-05 22:20 UTC|newest]

Thread overview: 124+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-05 15:54 [RFC] UAPI: Check headers by compiling all together as C++ David Howells
2018-09-05 15:54 ` David Howells
2018-09-05 15:54 ` David Howells
2018-09-05 15:54 ` David Howells
2018-09-05 15:54 ` David Howells
2018-09-05 15:54 ` [PATCH 01/11] UAPI: drm: Fix use of C++ keywords as structural members David Howells
2018-09-05 15:54   ` David Howells
2018-09-05 15:54 ` [PATCH 02/11] UAPI: keys: " David Howells
2018-09-05 15:54   ` David Howells
2018-09-05 15:54 ` [PATCH 03/11] UAPI: virtio_net: " David Howells
2018-09-05 16:54   ` Greg KH
2018-09-05 16:54   ` Greg KH
2018-09-05 17:15   ` David Howells
2018-09-05 17:15   ` David Howells
2018-09-05 17:35   ` Michael S. Tsirkin
2018-09-05 17:35   ` Michael S. Tsirkin
2018-09-06  7:09   ` David Howells
2018-09-06  7:09   ` David Howells
2018-09-06 14:36     ` Michael S. Tsirkin
2018-09-06 14:36     ` Michael S. Tsirkin
2018-09-05 15:54 ` David Howells
2018-09-05 15:55 ` [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array David Howells
2018-10-02 14:52   ` Jan Engelhardt
2018-10-09 15:41   ` David Howells
2018-10-09 16:54     ` Jan Engelhardt
2018-09-05 15:55 ` [PATCH 05/11] UAPI: coda: Don't use internal kernel structs in UAPI David Howells
2018-09-05 16:54   ` Jan Harkes
2018-09-05 17:12   ` Yann Droneaud
2018-09-05 17:28     ` Jan Harkes
2018-09-05 17:28       ` Jan Harkes
2018-09-05 17:24   ` David Howells
2018-09-06  7:13   ` David Howells
2018-09-06 11:52     ` Yann Droneaud
2018-09-06 12:16       ` Jan Harkes
2018-09-06 12:16         ` Jan Harkes
2018-09-06 14:53     ` David Howells
2018-09-05 15:55 ` [PATCH 06/11] UAPI: netfilter: Fix symbol collision issues David Howells
2018-09-05 15:55 ` [PATCH 07/11] UAPI: nilfs2: Fix use of undefined byteswapping functions David Howells
2018-09-05 22:20   ` Al Viro [this message]
2018-09-05 15:55 ` [PATCH 08/11] UAPI: sound: Fix use of u32 and co. in UAPI headers David Howells
2018-09-05 15:55   ` David Howells
2018-09-06  5:59   ` Takashi Sakamoto
2018-09-06  5:59     ` Takashi Sakamoto
2018-09-06  8:17   ` David Howells
2018-09-05 15:55 ` [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers David Howells
2018-09-05 15:55   ` David Howells
2018-09-05 15:55   ` David Howells
2018-09-05 15:55 ` [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE David Howells
2018-09-05 15:55   ` David Howells
2018-09-05 15:55 ` [PATCH 11/11] UAPI: Check headers build for C++ David Howells
2018-09-05 16:55 ` [RFC] UAPI: Check headers by compiling all together as C++ Greg KH
2018-09-05 16:55 ` Greg KH
2018-09-05 16:55   ` Greg KH
2018-09-05 16:55   ` Greg KH
2018-09-05 16:55   ` Greg KH
2018-09-05 17:33   ` Yann Droneaud
2018-09-05 17:33     ` Yann Droneaud
2018-09-05 17:33     ` Yann Droneaud
2018-09-05 17:33     ` Yann Droneaud
2018-09-05 17:42     ` Michael S. Tsirkin
2018-09-05 17:42     ` Michael S. Tsirkin
2018-09-05 17:42       ` Michael S. Tsirkin
2018-09-05 17:42       ` Michael S. Tsirkin
2018-09-05 17:42       ` Michael S. Tsirkin
2018-09-05 17:42       ` Michael S. Tsirkin
2018-09-05 17:42       ` Michael S. Tsirkin
2018-09-06  7:12     ` Yann Droneaud
2018-09-06  7:12       ` Yann Droneaud
2018-09-06  7:12       ` Yann Droneaud
2018-09-06  7:12       ` Yann Droneaud
2018-09-05 19:22   ` Jan Engelhardt
2018-09-05 19:22   ` Jan Engelhardt
2018-09-05 19:22     ` Jan Engelhardt
2018-09-05 19:22     ` Jan Engelhardt
2018-09-05 19:22     ` Jan Engelhardt
2018-09-05 17:50 ` David Howells
2018-09-05 17:50 ` David Howells
2018-09-05 17:50   ` David Howells
2018-09-06  9:18 David Howells
2018-09-06  9:18 ` David Howells
2018-09-06  9:18 ` David Howells
2018-09-06  9:18 ` David Howells
2018-09-06  9:18 ` David Howells
     [not found] ` <153622549721.14298.8116794954073122489.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2018-09-06  9:18   ` [PATCH 01/11] UAPI: drm: Fix use of C++ keywords as structural members [ver #2] David Howells
2018-09-06  9:18     ` David Howells
2018-09-06  9:18 ` [PATCH 02/11] UAPI: keys: " David Howells
2018-09-06  9:18   ` David Howells
2018-09-06  9:18 ` [PATCH 03/11] UAPI: virtio_net: " David Howells
2018-09-06 15:02   ` Michael S. Tsirkin
2018-09-06 15:02   ` Michael S. Tsirkin
2018-09-06  9:18 ` David Howells
2018-09-06  9:18 ` [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array " David Howells
2018-09-06  9:18 ` [PATCH 05/11] UAPI: coda: Move kernel internals out of public view " David Howells
2018-09-06  9:18   ` David Howells
2018-09-06  9:19 ` [PATCH 06/11] coda: Move internal defs out of include/linux/ " David Howells
2018-09-06  9:19 ` [PATCH 07/11] UAPI: netfilter: Fix symbol collision issues " David Howells
2018-09-10 17:32   ` kbuild test robot
2018-09-10 17:32     ` kbuild test robot
2018-09-10 17:32     ` kbuild test robot
2018-09-28 13:07   ` [netfilter-core] " Pablo Neira Ayuso
2018-10-09 15:35   ` David Howells
2018-09-06  9:19 ` [PATCH 08/11] UAPI: nilfs2: Fix use of undefined byteswapping functions " David Howells
2018-09-06  9:19 ` [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers " David Howells
2018-09-06  9:19   ` David Howells
2018-09-06  9:19   ` David Howells
2018-09-25 20:22   ` Dan Williams
2018-09-25 20:22     ` Dan Williams
2018-09-25 20:22     ` Dan Williams
2018-09-06  9:19 ` [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE " David Howells
2018-09-06  9:19   ` David Howells
2018-09-06  9:19   ` David Howells
2018-09-25 20:17   ` Dan Williams
2018-09-25 20:17     ` Dan Williams
2018-09-25 20:17     ` Dan Williams
2018-10-09 15:36   ` David Howells
2018-10-09 15:36     ` David Howells
2018-09-06  9:19 ` [PATCH 11/11] UAPI: Check headers build for C++ " David Howells
2018-09-10 16:26   ` kbuild test robot
2018-09-10 16:26     ` kbuild test robot
2018-09-10 16:26     ` kbuild test robot
2018-09-10 17:02   ` kbuild test robot
2018-09-10 17:02     ` kbuild test robot
2018-09-10 17:02     ` kbuild test robot
2018-09-14  9:10   ` Arnd Bergmann

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