config/kernel-zlib.m4

   1 dnl #
   2 dnl # 2.6.39 API compat,
   3 dnl
   4 dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
   5 dnl # This was done to avoid always having to allocate the maximum size
   6 dnl # workspace (268K).  The caller can now specific the windowBits and
   7 dnl # memLevel compression parameters to get a smaller workspace.
   8 dnl #
   9 AC_DEFUN([ZFS_AC_KERNEL_SRC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE], [
  10         ZFS_LINUX_TEST_SRC([2args_zlib_deflate_workspacesize], [
  11                 #include <linux/zlib.h>
  12         ],[
  13                 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
  14         ])
  15 ])
  16
  17 AC_DEFUN([ZFS_AC_KERNEL_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE], [
  18         AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
  19         ZFS_LINUX_TEST_RESULT([2args_zlib_deflate_workspacesize], [
  20                 AC_MSG_RESULT(yes)
  21                 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
  22                     [zlib_deflate_workspacesize() wants 2 args])
  23         ],[
  24                 ZFS_LINUX_TEST_ERROR([zlib_deflate_workspacesize()])
  25         ])
  26 ])