X-Git-Url: https://git.openafs.org/?p=openafs.git;a=blobdiff_plain;f=src%2Fcf%2Flinux-test4.m4;h=180083a9813d841df11767222a70438aa6411713;hp=6b24ce573e370205b0f7b021c802a5754d73ae19;hb=f49bf1d919b48901533da78c9fe38ca0339b7bca;hpb=2d07a62c38fea642d52c20ff86e8f72e3c16bbe0

diff --git a/src/cf/linux-test4.m4 b/src/cf/linux-test4.m4
index 6b24ce5..180083a 100644
--- a/src/cf/linux-test4.m4
+++ b/src/cf/linux-test4.m4
@@ -825,6 +825,22 @@ AC_DEFUN([LINUX_GENERIC_FILE_AIO_READ], [
     AC_DEFINE([GENERIC_FILE_AIO_READ], 1, [define if your kernel has generic_file_aio_read()])
   fi])
 
+AC_DEFUN([LINUX_HAVE_I_SIZE_READ], [
+  AC_MSG_CHECKING([for linux i_size_read()])
+  AC_CACHE_VAL([ac_cv_linux_i_size_read], [
+    save_CPPFLAGS="$CPPFLAGS"
+    CPPFLAGS="$CPPFLAGS -Werror-implicit-function-declaration"
+    AC_TRY_KBUILD(
+[#include <linux/fs.h>],
+[i_size_read(NULL);],
+      ac_cv_linux_i_size_read=yes,
+      ac_cv_linux_i_size_read=no)
+    CPPFLAGS="$save_CPPFLAGS"])
+  AC_MSG_RESULT($ac_cv_linux_i_size_read)
+  if test "x$ac_cv_linux_i_size_read" = "xyes"; then
+    AC_DEFINE([HAVE_LINUX_I_SIZE_READ], 1, [define if your kernel has i_size_read()])
+  fi])
+
 AC_DEFUN([LINUX_FREEZER_H_EXISTS], [
   AC_MSG_CHECKING([for linux/freezer.h existance])
   AC_CACHE_VAL([ac_cv_linux_freezer_h_exists], [