linux PageCheck may be PageFsMisc

Define the PageCheck family of functions using PageFsMisc
equivalents if those are found.  I encountered a need for this
on Centos 5.5 (2.6.18-8.el5xen), but it may be more general.

Change-Id: I365a769614fd7514e0c0223bf1854cce09f759f7
Reviewed-on: http://gerrit.openafs.org/1982
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>

diff --git a/acinclude.m4 b/acinclude.m4
index fbafce1..2ba05df 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -810,6 +810,16 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
                  AC_CHECK_LINUX_FUNC([bdi_init],
                                     [#include <linux/backing-dev.h>],
                                     [bdi_init(NULL);])
+                 AC_CHECK_LINUX_FUNC([PageChecked],
+                                    [#include <linux/mm.h>
+#include <linux/page-flags.h>],
+                                    [struct page *_page;
+                                      int bchecked = PageChecked(_page);])
+                 AC_CHECK_LINUX_FUNC([PageFsMisc],
+                                    [#include <linux/mm.h>
+#include <linux/page-flags.h>],
+                                    [struct page *_page;
+                                      int bchecked = PageFsMisc(_page);])
                 AC_CHECK_LINUX_FUNC([ctl_table], [ctl_name], [sysctl.h])
                 AC_CHECK_LINUX_FUNC([current_kernel_time],
                                     [#include <linux/time.h>],

diff --git a/src/afs/LINUX/osi_compat.h b/src/afs/LINUX/osi_compat.h
index fbeb7e2..c9a2878 100644 (file)
--- a/src/afs/LINUX/osi_compat.h
+++ b/src/afs/LINUX/osi_compat.h
@@ -292,3 +292,13 @@ afs_try_to_freeze(void) {
 }
 #endif
 
+#if !defined(HAVE_LINUX_PAGECHECKED)
+# if defined(HAVE_LINUX_PAGEFSMISC)
+#  include <linux/page-flags.h>
+
+#  define PageChecked(p)            PageFsMisc((p))
+#  define SetPageChecked(p)         SetPageFsMisc((p))
+#  define ClearPageChecked(p)       ClearPageFsMisc((p))
+
+# endif
+#endif