config/kernel-generic_fadvise.m4

   1 dnl #
   2 dnl # 5.3 API change
   3 dnl # The generic_fadvise() function is present since 4.19 kernel
   4 dnl # but it was not exported until Linux 5.3.
   5 dnl #
   6 AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_FADVISE], [
   7         ZFS_LINUX_TEST_SRC([generic_fadvise], [
   8                 #include <linux/fs.h>
   9         ], [
  10                 struct file *fp __attribute__ ((unused)) = NULL;
  11                 loff_t offset __attribute__ ((unused)) = 0;
  12                 loff_t len __attribute__ ((unused)) = 0;
  13                 int advise __attribute__ ((unused)) = 0;
  14                 generic_fadvise(fp, offset, len, advise);
  15         ])
  16 ])
  17
  18 AC_DEFUN([ZFS_AC_KERNEL_GENERIC_FADVISE], [
  19         AC_MSG_CHECKING([whether generic_fadvise() is available])
  20         ZFS_LINUX_TEST_RESULT_SYMBOL([generic_fadvise],
  21         [generic_fadvise], [mm/fadvise.c], [
  22                 AC_MSG_RESULT(yes)
  23                 AC_DEFINE(HAVE_GENERIC_FADVISE, 1, [yes])
  24         ],[
  25                 AC_MSG_RESULT(no)
  26         ])
  27 ])