LU-13783 libcfs: provide fallback kallsyms_lookup_name()

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

diff --git a/libcfs/autoconf/lustre-libcfs.m4 b/libcfs/autoconf/lustre-libcfs.m4
index c787b14..d3dcc6c 100644 (file)
--- a/libcfs/autoconf/lustre-libcfs.m4
+++ b/libcfs/autoconf/lustre-libcfs.m4
@@ -1290,6 +1290,34 @@ EXTRA_KCFLAGS="$tmp_flags"
 ]) # LIBCFS_CACHE_DETAIL_WRITERS
 
 #
+# LIBCFS_KALLSYMS_LOOKUP
+#
+# kernel v5.6-11591-g0bd476e6c671
+# kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol()
+AC_DEFUN([LIBCFS_KALLSYMS_LOOKUP], [
+LB_CHECK_EXPORT([kallsyms_lookup_name], [kernel/kallsyms.c],
+       [AC_DEFINE(HAVE_KALLSYMS_LOOKUP_NAME, 1,
+               [kallsyms_lookup_name is exported by kernel])])
+]) # LIBCFS_KALLSYMS_LOOKUP
+
+#
+# LIBCFS_VMALLOC_2ARGS
+#
+# kernel v5.8-rc1~201^2~19
+# mm: remove the pgprot argument to __vmalloc
+AC_DEFUN([LIBCFS_VMALLOC_2ARGS], [
+LB_CHECK_COMPILE([if __vmalloc has 2 args],
+vmalloc_2args, [
+       #include <linux/vmalloc.h>
+],[
+       __vmalloc(0, 0);
+],[
+       AC_DEFINE(HAVE_VMALLOC_2ARGS, 1,
+               [__vmalloc only takes 2 args.])
+])
+]) # LIBCFS_VMALLOC_2ARGS
+
+#
 # LIBCFS_HAVE_NR_UNSTABLE_NFS
 #
 # kernel v5.8-rc1~201^2~75
@@ -1458,9 +1486,12 @@ LIBCFS_LOOKUP_USER_KEY
 LIBCFS_FORCE_SIG_WITH_TASK
 LIBCFS_CACHE_DETAIL_WRITERS
 LIBCFS_HAVE_NR_UNSTABLE_NFS
+# 5.7
+LIBCFS_KALLSYMS_LOOKUP
 # 5.8
 LIBCFS_HAVE_MMAP_LOCK
 LIBCFS_KERNEL_SETSOCKOPT
+LIBCFS_VMALLOC_2ARGS
 ]) # LIBCFS_PROG_LINUX
 
 #