LU-13783 osc: handle removal of NR_UNSTABLE_NFS

[fs/lustre-release.git] / libcfs / autoconf / lustre-libcfs.m4

diff --git a/libcfs/autoconf/lustre-libcfs.m4 b/libcfs/autoconf/lustre-libcfs.m4
index b42c9a7..529b534 100644 (file)
--- a/libcfs/autoconf/lustre-libcfs.m4
+++ b/libcfs/autoconf/lustre-libcfs.m4
@@ -1045,6 +1045,31 @@ LB_CHECK_EXPORT([save_stack_trace_tsk], [arch/$SUBARCH/kernel/stacktrace.c],
 ]) # LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
 
 #
+# LIBCFS_LOCKDEP_IS_HELD
+#
+# Kernel v4.15-rc8-106-g08f36ff64234
+# lockdep: Make lockdep checking constant
+#
+AC_DEFUN([LIBCFS_LOCKDEP_IS_HELD], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if 'lockdep_is_held()' uses const argument],
+lockdep_is_held, [
+       #include <linux/lockdep.h>
+],[
+#ifdef CONFIG_LOCKDEP
+       const struct spinlock *lock = NULL;
+
+       lockdep_is_held(lock);
+#endif
+],[],[
+       AC_DEFINE(NEED_LOCKDEP_IS_HELD_DISCARD_CONST, 1,
+               [lockdep_is_held() argument is const])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_LOCKDEP_IS_HELD
+
+#
 # LIBCFS_TIMER_SETUP
 #
 # Kernel version 4.15 commit e99e88a9d2b067465adaa9c111ada99a041bef9a
@@ -1135,12 +1160,12 @@ tmp_flags="$EXTRA_KCFLAGS"
 EXTRA_KCFLAGS="-Werror"
 LB_CHECK_COMPILE([if page cache uses Xarray],
 xarray_support, [
-       #include <linux/radix-tree.h>
+       #include <linux/xarray.h>
 ],[
-       radix_tree_exceptional_entry(NULL);
+       xa_is_value(NULL);
 ],[
-       AC_DEFINE(HAVE_RADIX_TREE_EXCEPTIONAL_ENTRY, 1,
-               [kernel lacks 'xa_is_value'])
+       AC_DEFINE(HAVE_XARRAY_SUPPORT, 1,
+               [kernel Xarray implementation lacks 'xa_is_value'])
 ])
 EXTRA_KCFLAGS="$tmp_flags"
 ]) # LIBCFS_XARRAY_SUPPORT
@@ -1265,17 +1290,27 @@ EXTRA_KCFLAGS="$tmp_flags"
 ]) # LIBCFS_CACHE_DETAIL_WRITERS
 
 #
-# LIBCFS_CONFIG_CRYPTO_CRC32
+# LIBCFS_HAVE_NR_UNSTABLE_NFS
 #
-# The kernel must support CONFIG_CRYPTO_CRC32 to RPC checksumming
+# kernel v5.8-rc1~201^2~75
+# mm/writeback: discard NR_UNSTABLE_NFS, use NR_WRITEBACK instead
 #
-AC_DEFUN([LIBCFS_CONFIG_CRYPTO_CRC32], [
-LB_CHECK_CONFIG_IM([CRYPTO_CRC32], [],
-       [AC_MSG_ERROR([
+AC_DEFUN([LIBCFS_HAVE_NR_UNSTABLE_NFS], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if NR_UNSTABLE_NFS still in use],
+nr_unstable_nfs_exists, [
+       #include <linux/mm.h>
 
-Lustre requires that CONFIG_CRYPTO_CRC32 is enabled in your kernel.
-])])
-]) # LIBCFS_CONFIG_CRYPTO_CRC32
+       int i;
+],[
+       i = NR_UNSTABLE_NFS;
+],[
+       AC_DEFINE(HAVE_NR_UNSTABLE_NFS, 1,
+               [NR_UNSTABLE_NFS is still in use.])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LIBCFS_HAVE_NR_UNSTABLE_NFS
 
 AC_DEFUN([LIBCFS_PROG_LINUX_SRC], [] )
 AC_DEFUN([LIBCFS_PROG_LINUX_RESULTS], [])
@@ -1289,7 +1324,6 @@ AC_DEFUN([LIBCFS_PROG_LINUX], [
 AC_MSG_NOTICE([LibCFS kernel checks
 ==============================================================================])
 LIBCFS_CONFIG_PANIC_DUMPLOG
-LIBCFS_CONFIG_CRYPTO_CRC32
 
 # 3.11
 LIBCFS_KTIME_GET_TS64
@@ -1367,6 +1401,7 @@ LIBCFS_NEW_KERNEL_WRITE
 LIBCFS_NEW_KERNEL_READ
 LIBCFS_EXPORT_SAVE_STACK_TRACE_TSK
 # 4.15
+LIBCFS_LOCKDEP_IS_HELD
 LIBCFS_TIMER_SETUP
 # 4.16
 LIBCFS_WAIT_VAR_EVENT
@@ -1384,6 +1419,7 @@ LIBCFS_GET_REQUEST_KEY_AUTH
 LIBCFS_LOOKUP_USER_KEY
 LIBCFS_FORCE_SIG_WITH_TASK
 LIBCFS_CACHE_DETAIL_WRITERS
+LIBCFS_HAVE_NR_UNSTABLE_NFS
 ]) # LIBCFS_PROG_LINUX
 
 #