config/kernel-pagemap-folio_wait_bit.m4

   1 dnl #
   2 dnl # Linux 5.16 no longer allows directly calling wait_on_page_bit, and
   3 dnl # instead requires you to call folio-specific functions. In this case,
   4 dnl # wait_on_page_bit(pg, PG_writeback) becomes
   5 dnl # folio_wait_bit(pg, PG_writeback)
   6 dnl #
   7 AC_DEFUN([ZFS_AC_KERNEL_SRC_PAGEMAP_FOLIO_WAIT_BIT], [
   8         ZFS_LINUX_TEST_SRC([pagemap_has_folio_wait_bit], [
   9                 #include <linux/pagemap.h>
  10         ],[
  11                 static struct folio *f = NULL;
  12
  13                 folio_wait_bit(f, PG_writeback);
  14         ])
  15 ])
  16
  17 AC_DEFUN([ZFS_AC_KERNEL_PAGEMAP_FOLIO_WAIT_BIT], [
  18         AC_MSG_CHECKING([whether folio_wait_bit() exists])
  19         ZFS_LINUX_TEST_RESULT([pagemap_has_folio_wait_bit], [
  20                 AC_MSG_RESULT([yes])
  21                 AC_DEFINE(HAVE_PAGEMAP_FOLIO_WAIT_BIT, 1,
  22                         [folio_wait_bit() exists])
  23         ],[
  24                 AC_MSG_RESULT([no])
  25         ])
  26 ])