Re: [PATCH] libxfs: fix compilation errors

[Christoph Hellwig <hch@infradead.org>]

On Wed, Oct 14, 2026 at 10:44:42AM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> Add includes to eliminate warnings from -Werror=missing-prototypes.
> It's not a good idea to let the compiler apply the default function
> declaration.

What do I need to do to see these warnings?  I'm getting a few warnings
at the moment (and plan to look into them), but they are entirely
different:

xfs_alloc.c: In function '__xfs_free_extent':
xfs_alloc.c:4017:41: warning: variable 'busy_flags' set but not used [-Wunused-but-set-variable=]
 4017 |         unsigned int                    busy_flags = 0;
      |                                         ^~~~~~~~~~
xfs_bmap.c: In function 'xfs_bmapi_convert_one_delalloc':
xfs_bmap.c:4360:33: warning: variable 'flags' set but not used [-Wunused-but-set-variable=]
 4360 |         uint16_t                flags = 0;
      |                                 ^~~~~
xfs_log_rlimit.c: In function 'libxfs_log_get_max_trans_res':
xfs_log_rlimit.c:162:33: warning: variable 'i' set but not used [-Wunused-but-set-variable=]
  162 |         unsigned int            i;
      |                                 ^
2345 translated messages.
3139 translated messages.
prefetch.c: In function ‘do_inode_prefetch’:
prefetch.c:1027:33: warning: variable ‘queues_started’ set but not used [-Wunused-but-set-variable=]
 1027 |         int                     queues_started = 0;
      |                                 ^~~~~~~~~~~~~~
btheight.c: In function ‘construct_records_per_block’:
btheight.c:158:11: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
  158 |         p = strchr(tag, ':');