[dhowells-fs:netfs-next 7/39] fs/netfs/buffered_read.c:245:26: error: use of undeclared identifier 'NETFS_RREQ_USE_PGPRIV2'

[dhowells-fs:netfs-next 7/39] fs/netfs/buffered_read.c:245:26: error: use of undeclared identifier 'NETFS_RREQ_USE_PGPRIV2'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-next
head:   269568d526a993d695379e3c37d599f758d032e6
commit: b9dd5c588eac28f57bdaf97310537791e362174a [7/39] netfs: Make deprecated PG_private_2 support optional
config: loongarch-randconfig-r121-20260907 (https://download.01.org/0day-ci/archive/20260908/202609080335.vRMq1hN5-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 2362eeb5f75560740146975e9eabe84c6bd25a0d)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260908/202609080335.vRMq1hN5-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609080335.vRMq1hN5-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/netfs/buffered_read.c:245:26: error: use of undeclared identifier 'NETFS_RREQ_USE_PGPRIV2'
     245 |                         if (unlikely(test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags))) {
         |                                               ^~~~~~~~~~~~~~~~~~~~~~
>> fs/netfs/buffered_read.c:245:26: error: use of undeclared identifier 'NETFS_RREQ_USE_PGPRIV2'
     245 |                         if (unlikely(test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags))) {
         |                                               ^~~~~~~~~~~~~~~~~~~~~~
>> fs/netfs/buffered_read.c:245:26: error: use of undeclared identifier 'NETFS_RREQ_USE_PGPRIV2'
     245 |                         if (unlikely(test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags))) {
         |                                               ^~~~~~~~~~~~~~~~~~~~~~
   3 errors generated.


vim +/NETFS_RREQ_USE_PGPRIV2 +245 fs/netfs/buffered_read.c

e2d46f2ec332533 David Howells 2024-12-16  213  
533203c4183123d David Howells 2026-08-27  214  /*
533203c4183123d David Howells 2026-08-27  215   * Mark folios that we want to copy to the cache.  For filesystems that use
533203c4183123d David Howells 2026-08-27  216   * netfslib fully, we set folio->private to NETFS_FOLIO_COPY_TO_CACHE;
533203c4183123d David Howells 2026-08-27  217   * otherwise we set the deprecated PG_private_2.
533203c4183123d David Howells 2026-08-27  218   */
533203c4183123d David Howells 2026-08-27  219  static void netfs_mark_copy_to_cache(struct netfs_io_request *rreq,
533203c4183123d David Howells 2026-08-27  220  				     struct folio_queue **fq,
533203c4183123d David Howells 2026-08-27  221  				     unsigned int *offset,
533203c4183123d David Howells 2026-08-27  222  				     int *slot,
533203c4183123d David Howells 2026-08-27  223  				     size_t len,
533203c4183123d David Howells 2026-08-27  224  				     bool copy)
533203c4183123d David Howells 2026-08-27  225  {
533203c4183123d David Howells 2026-08-27  226  	while (len > 0) {
533203c4183123d David Howells 2026-08-27  227  		struct folio *folio;
533203c4183123d David Howells 2026-08-27  228  		size_t fsize, overlap;
533203c4183123d David Howells 2026-08-27  229  
533203c4183123d David Howells 2026-08-27  230  		if (!*fq)
533203c4183123d David Howells 2026-08-27  231  			break;
533203c4183123d David Howells 2026-08-27  232  		if (*slot >= folioq_count(*fq)) {
533203c4183123d David Howells 2026-08-27  233  			*fq = (*fq)->next;
533203c4183123d David Howells 2026-08-27  234  			*slot = 0;
533203c4183123d David Howells 2026-08-27  235  			*offset = 0;
533203c4183123d David Howells 2026-08-27  236  			continue;
533203c4183123d David Howells 2026-08-27  237  		}
533203c4183123d David Howells 2026-08-27  238  
533203c4183123d David Howells 2026-08-27  239  		/* Determine how much the subreq overlaps the folio, if at all. */
533203c4183123d David Howells 2026-08-27  240  		fsize = folioq_folio_size(*fq, *slot);
533203c4183123d David Howells 2026-08-27  241  		overlap = min(len, fsize - *offset);
533203c4183123d David Howells 2026-08-27  242  
533203c4183123d David Howells 2026-08-27  243  		if (overlap > 0 && copy) {
533203c4183123d David Howells 2026-08-27  244  			folio = folioq_folio(*fq, *slot);
533203c4183123d David Howells 2026-08-27 @245  			if (unlikely(test_bit(NETFS_RREQ_USE_PGPRIV2, &rreq->flags))) {
533203c4183123d David Howells 2026-08-27  246  				if (!folio_test_private_2(folio))
533203c4183123d David Howells 2026-08-27  247  					folio_start_private_2(folio);
533203c4183123d David Howells 2026-08-27  248  			} else {
533203c4183123d David Howells 2026-08-27  249  				if (!folio_get_private(folio))
533203c4183123d David Howells 2026-08-27  250  					folio_attach_private(folio, NETFS_FOLIO_COPY_TO_CACHE);
533203c4183123d David Howells 2026-08-27  251  			}
533203c4183123d David Howells 2026-08-27  252  			trace_netfs_folio(folio, netfs_folio_trace_mark_copy);
533203c4183123d David Howells 2026-08-27  253  		}
533203c4183123d David Howells 2026-08-27  254  
533203c4183123d David Howells 2026-08-27  255  		len -= overlap;
533203c4183123d David Howells 2026-08-27  256  		*offset += overlap;
533203c4183123d David Howells 2026-08-27  257  		if (*offset >= fsize) {
533203c4183123d David Howells 2026-08-27  258  			*slot += 1;
533203c4183123d David Howells 2026-08-27  259  			*offset = 0;
533203c4183123d David Howells 2026-08-27  260  		}
533203c4183123d David Howells 2026-08-27  261  	}
533203c4183123d David Howells 2026-08-27  262  }
533203c4183123d David Howells 2026-08-27  263  

:::::: The code at line 245 was first introduced by commit
:::::: 533203c4183123dad8ffecd694e7573a0ccd0da0 netfs: Mark folios with COPY_TO_CACHE whilst issuing subreqs

:::::: TO: David Howells <dhowells@redhat.com>
:::::: CC: Christian Brauner <brauner@kernel.org>

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