• Boaz Harrosh's avatar
    direct-io: fix uninitialized warning in do_direct_IO() · 6fcc5420
    Boaz Harrosh authored
    The following warnings:
    
      fs/direct-io.c: In function ‘__blockdev_direct_IO’:
      fs/direct-io.c:1011:12: warning: ‘to’ may be used uninitialized in this function [-Wmaybe-uninitialized]
      fs/direct-io.c:913:16: note: ‘to’ was declared here
      fs/direct-io.c:1011:12: warning: ‘from’ may be used uninitialized in this function [-Wmaybe-uninitialized]
      fs/direct-io.c:913:10: note: ‘from’ was declared here
    
    are false positive because dio_get_page() either fails, or sets both
    'from' and 'to'.
    
    Paul Bolle said ...
    Maybe it's better to move initializing "to" and "from" out of
    dio_get_page(). That _might_ make it easier for both the the reader and
    the compiler to understand what's going on. Something like this:
    
    Christoph Hellwig said ...
    The fix of moving the code definitively looks nicer, while I think
    uninitialized_var is horrible wart that won't get anywhere near my code.
    
    Boaz Harrosh: I agree with Christoph and Paul
    Signed-off-by: default avatarBoaz Harrosh <boaz@plexistor.com>
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    6fcc5420
direct-io.c 37.7 KB