X-Git-Url: https://git.openafs.org/?p=openafs.git;a=blobdiff_plain;f=src%2Fcf%2Flinux-test4.m4;h=ae22e138ee63c0842ce412aacde2f964beea58f9;hp=cc2a8bcd2990f5aa7f1cfd4faf41e6057c5ca0c7;hb=954a6215de050d145d8554b383a619e840ce5137;hpb=3b75d2d05dcb8bab58be6ebb84af03364818ec46

diff --git a/src/cf/linux-test4.m4 b/src/cf/linux-test4.m4
index cc2a8bc..ae22e13 100644
--- a/src/cf/linux-test4.m4
+++ b/src/cf/linux-test4.m4
@@ -1,3 +1,18 @@
+AC_DEFUN(LINUX_FS_STRUCT_INODE_HAS_I_MMAP_SHARED, [
+AC_MSG_CHECKING(for i_mmap_shared in struct inode)
+save_CPPFLAGS="$CPPFLAGS"
+CPPFLAGS="-I${LINUX_KERNEL_PATH}/include -D__KERNEL__ $CPPFLAGS"
+AC_CACHE_VAL(ac_cv_linux_fs_struct_inode_has_i_mmap_shared,
+[
+AC_TRY_COMPILE(
+[#include <linux/fs.h>],
+[struct inode _inode;
+printf("%d\n", _inode.i_mmap_shared);],
+ac_cv_linux_fs_struct_inode_has_i_mmap_shared=yes,
+ac_cv_linux_fs_struct_inode_has_i_mmap_shared=no)])
+AC_MSG_RESULT($ac_cv_linux_fs_struct_inode_has_i_mmap_shared)
+CPPFLAGS="$save_CPPFLAGS"])
+
 AC_DEFUN(LINUX_FS_STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS, [
 AC_MSG_CHECKING(for i_dirty_data_buffers in struct inode)
 save_CPPFLAGS="$CPPFLAGS"