Re: [PATCH] btrfs: ctree: Add do {} while (0) in btrfs_{set|clear}_and_info

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On Tue, 2020-07-07 at 11:34 +0300, Nikolay Borisov wrote:
> 
> On 6.07.20 г. 17:59 ч., Marcos Paulo de Souza wrote:
> > From: Marcos Paulo de Souza <mpdesouza@xxxxxxxx>
> > 
> > Without this change it's not possible to use these macros and
> having an
> > if-else construction without using braces.
> > 
> > Signed-off-by: Marcos Paulo de Souza <mpdesouza@xxxxxxxx>
> 
> This change would have been better accompanied with another one
> showing
> intended usage. If it's part of a bigger rework then postpone it and
> send everything altogether.

Yes, this is part of my fscontext btrfs port. Ok, I'll send this again
again along with all the port patches.

Thanks,
  Marcos

> 
> > ---
> >  fs/btrfs/ctree.h | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> > index a256961c0dbe..cef0489a1523 100644
> > --- a/fs/btrfs/ctree.h
> > +++ b/fs/btrfs/ctree.h
> > @@ -1278,18 +1278,18 @@ static inline u32
> BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
> >  					 BTRFS_MOUNT_##opt)
> >  
> >  #define btrfs_set_and_info(fs_info, opt, fmt, args...)		
> 	\
> > -{									
> \
> > +do {								
> 	\
> >  	if (!btrfs_test_opt(fs_info, opt))				
> \
> >  		btrfs_info(fs_info, fmt, ##args);			\
> >  	btrfs_set_opt(fs_info->mount_opt, opt);				
> \
> > -}
> > +} while (0)
> >  
> >  #define btrfs_clear_and_info(fs_info, opt, fmt, args...)		
> \
> > -{									
> \
> > +do {								
> 	\
> >  	if (btrfs_test_opt(fs_info, opt))				\
> >  		btrfs_info(fs_info, fmt, ##args);			\
> >  	btrfs_clear_opt(fs_info->mount_opt, opt);			\
> > -}
> > +} while (0)
> >  
> >  /*
> >   * Requests for changes that need to be done during transaction
> commit.
> > 




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