config/kernel-vfs-set_page_dirty.m4

   1 dnl #
   2 dnl # Linux 5.14 adds a change to require set_page_dirty to be manually
   3 dnl # wired up in struct address_space_operations. Determine if this needs
   4 dnl # to be done. This patch set also introduced __set_page_dirty_nobuffers
   5 dnl # declaration in linux/pagemap.h, so these tests look for the presence
   6 dnl # of that function to tell the compiler to assign set_page_dirty in
   7 dnl # module/os/linux/zfs/zpl_file.c
   8 dnl #
   9 AC_DEFUN([ZFS_AC_KERNEL_SRC_VFS_SET_PAGE_DIRTY_NOBUFFERS], [
  10         ZFS_LINUX_TEST_SRC([vfs_has_set_page_dirty_nobuffers], [
  11                 #include <linux/pagemap.h>
  12                 #include <linux/fs.h>
  13
  14                 static const struct address_space_operations
  15                     aops __attribute__ ((unused)) = {
  16                         .set_page_dirty = __set_page_dirty_nobuffers,
  17                 };
  18         ],[])
  19 ])
  20
  21 AC_DEFUN([ZFS_AC_KERNEL_VFS_SET_PAGE_DIRTY_NOBUFFERS], [
  22         dnl #
  23         dnl # Linux 5.14 change requires set_page_dirty() to be assigned
  24         dnl # in address_space_operations()
  25         dnl #
  26         AC_MSG_CHECKING([whether __set_page_dirty_nobuffers exists])
  27         ZFS_LINUX_TEST_RESULT([vfs_has_set_page_dirty_nobuffers], [
  28                 AC_MSG_RESULT([yes])
  29                 AC_DEFINE(HAVE_VFS_SET_PAGE_DIRTY_NOBUFFERS, 1,
  30                         [__set_page_dirty_nobuffers exists])
  31         ],[
  32                 AC_MSG_RESULT([no])
  33         ])
  34 ])