Linux VM Integration Cleanup

Remove all instances of functions being reimplemented in the SPL.
When the prototypes are available in the linux headers but the
function address itself is not exported use kallsyms_lookup_name()
to find the address.  The function name itself can them become a
define which calls a function pointer.  This is preferable to
reimplementing the function in the SPL because it ensures we get
the correct version of the function for the running kernel.  This
is actually pretty safe because the prototype is defined in the
headers so we know we are calling the function properly.

This patch also includes a rhel5 kernel patch we exports the needed
symbols so we don't need to use kallsyms_lookup_name().  There are
autoconf checks to detect if the symbol is exported and if so to
use it directly.  We should add patches for stock upstream kernels
as needed if for no other reason than so we can easily track which
additional symbols we needed exported.  Those patches can also be
used by anyone willing to rebuild their kernel, but this should
not be a requirement.  The rhel5 version of the export-symbols
patch has been applied to the chaos kernel.

Additional fixes:
1) Implement vmem_size() function using get_vmalloc_info()
2) SPL_CHECK_SYMBOL_EXPORT macro updated to use $LINUX_OBJ instead
   of $LINUX because Module.symvers is a build product.  When
   $LINUX_OBJ != $LINUX we will not properly detect exported symbols.
3) SPL_LINUX_COMPILE_IFELSE macro updated to add include2 and
   $LINUX/include search paths to allow proper compilation when
   the kernel target build directory is not the source directory.

1 files changed, 114 insertions, 36 deletions

diff --git a/configure b/configure
index b0d5b8e58..d436b8a7c 100755
--- a/configure
+++ b/configure
@@ -19201,7 +19201,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19261,7 +19261,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19322,7 +19322,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19382,7 +19382,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19443,7 +19443,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19506,7 +19506,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19541,12 +19541,12 @@ rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.
 
 	echo "$as_me:$LINENO: checking whether symbol task_curr is exported" >&5
 echo $ECHO_N "checking whether symbol task_curr is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]task_curr[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]task_curr[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in kernel/sched.c; do
-			grep -q -E "EXPORT_SYMBOL.*(task_curr)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(task_curr)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -19607,7 +19607,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19667,7 +19667,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19702,12 +19702,12 @@ rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.
 
 	echo "$as_me:$LINENO: checking whether symbol device_create is exported" >&5
 echo $ECHO_N "checking whether symbol device_create is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]device_create[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]device_create[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in drivers/base/core.c; do
-			grep -q -E "EXPORT_SYMBOL.*(device_create)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(device_create)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -19741,12 +19741,12 @@ _ACEOF
 
 	echo "$as_me:$LINENO: checking whether symbol class_device_create is exported" >&5
 echo $ECHO_N "checking whether symbol class_device_create is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]class_device_create[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]class_device_create[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in drivers/base/class.c; do
-			grep -q -E "EXPORT_SYMBOL.*(class_device_create)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(class_device_create)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -19780,12 +19780,12 @@ _ACEOF
 
 	echo "$as_me:$LINENO: checking whether symbol set_normalized_timespec is exported" >&5
 echo $ECHO_N "checking whether symbol set_normalized_timespec is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]set_normalized_timespec[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]set_normalized_timespec[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in kernel/time.c; do
-			grep -q -E "EXPORT_SYMBOL.*(set_normalized_timespec)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(set_normalized_timespec)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -19845,7 +19845,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19907,7 +19907,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -19968,7 +19968,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20029,7 +20029,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20098,7 +20098,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20159,7 +20159,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20223,7 +20223,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20258,12 +20258,12 @@ rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.
 
 	echo "$as_me:$LINENO: checking whether symbol monotonic_clock is exported" >&5
 echo $ECHO_N "checking whether symbol monotonic_clock is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]monotonic_clock[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]monotonic_clock[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in ; do
-			grep -q -E "EXPORT_SYMBOL.*(monotonic_clock)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(monotonic_clock)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -20325,7 +20325,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20387,7 +20387,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20448,7 +20448,7 @@ _ACEOF
 
 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 echo "obj-m := conftest.o" >build/Makefile
-if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+if { ac_try='cp conftest.c build && make modules CC="$CC" LINUXINCLUDE="-Iinclude -Iinclude2 -I$LINUX/include -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
@@ -20481,14 +20481,92 @@ rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.
 
 
 
+	echo "$as_me:$LINENO: checking whether symbol kallsyms_lookup_name is exported" >&5
+echo $ECHO_N "checking whether symbol kallsyms_lookup_name is exported... $ECHO_C" >&6
+	grep -q -E '[[:space:]]kallsyms_lookup_name[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in ; do
+			grep -q -E "EXPORT_SYMBOL.*(kallsyms_lookup_name)" "$LINUX_OBJ/$file" 2>/dev/null
+			rc=$?
+		        if test $rc -eq 0; then
+		                export=1
+		                break;
+		        fi
+		done
+		if test $export -eq 0; then
+			echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+
+		else
+			echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_KALLSYMS_LOOKUP_NAME 1
+_ACEOF
+
+		fi
+	else
+		echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_KALLSYMS_LOOKUP_NAME 1
+_ACEOF
+
+	fi
+
+
+
+	echo "$as_me:$LINENO: checking whether symbol get_vmalloc_info is exported" >&5
+echo $ECHO_N "checking whether symbol get_vmalloc_info is exported... $ECHO_C" >&6
+	grep -q -E '[[:space:]]get_vmalloc_info[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
+	rc=$?
+	if test $rc -ne 0; then
+		export=0
+		for file in ; do
+			grep -q -E "EXPORT_SYMBOL.*(get_vmalloc_info)" "$LINUX_OBJ/$file" 2>/dev/null
+			rc=$?
+		        if test $rc -eq 0; then
+		                export=1
+		                break;
+		        fi
+		done
+		if test $export -eq 0; then
+			echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+
+		else
+			echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_GET_VMALLOC_INFO 1
+_ACEOF
+
+		fi
+	else
+		echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_GET_VMALLOC_INFO 1
+_ACEOF
+
+	fi
+
+
+
 	echo "$as_me:$LINENO: checking whether symbol first_online_pgdat is exported" >&5
 echo $ECHO_N "checking whether symbol first_online_pgdat is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]first_online_pgdat[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]first_online_pgdat[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in ; do
-			grep -q -E "EXPORT_SYMBOL.*(first_online_pgdat)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(first_online_pgdat)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -20522,12 +20600,12 @@ _ACEOF
 
 	echo "$as_me:$LINENO: checking whether symbol next_online_pgdat is exported" >&5
 echo $ECHO_N "checking whether symbol next_online_pgdat is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]next_online_pgdat[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]next_online_pgdat[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in ; do
-			grep -q -E "EXPORT_SYMBOL.*(next_online_pgdat)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(next_online_pgdat)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -20561,12 +20639,12 @@ _ACEOF
 
 	echo "$as_me:$LINENO: checking whether symbol next_zone is exported" >&5
 echo $ECHO_N "checking whether symbol next_zone is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]next_zone[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]next_zone[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in ; do
-			grep -q -E "EXPORT_SYMBOL.*(next_zone)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(next_zone)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1
@@ -20600,12 +20678,12 @@ _ACEOF
 
 	echo "$as_me:$LINENO: checking whether symbol get_zone_counts is exported" >&5
 echo $ECHO_N "checking whether symbol get_zone_counts is exported... $ECHO_C" >&6
-	grep -q -E '[[:space:]]get_zone_counts[[:space:]]' $LINUX/Module.symvers 2>/dev/null
+	grep -q -E '[[:space:]]get_zone_counts[[:space:]]' $LINUX_OBJ/Module.symvers 2>/dev/null
 	rc=$?
 	if test $rc -ne 0; then
 		export=0
 		for file in ; do
-			grep -q -E "EXPORT_SYMBOL.*(get_zone_counts)" "$LINUX/$file" 2>/dev/null
+			grep -q -E "EXPORT_SYMBOL.*(get_zone_counts)" "$LINUX_OBJ/$file" 2>/dev/null
 			rc=$?
 		        if test $rc -eq 0; then
 		                export=1