[PATCH v2 5/7] x86: generalize padding field handling

[Jan Beulich <jbeulich@suse.com>]

The original intention was to ignore padding fields, but the pattern
matched only ones whose names started with an underscore. Also match
fields whose names are in line with the C spec by not having a leading
underscore. (Note that the leading ^ in the sed regexps was pointless
and hence get dropped.)

This requires adjusting some vNUMA macros, to avoid triggering
"enumeration value ... not handled in switch" warnings, which - due to
-Werror - would cause the build to fail. (I have to admit that I find
these padding fields odd, when translation of the containing structure
is needed anyway.)

Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
While for translation macros skipping padding fields pretty surely is a
reasonable thing to do, we may want to consider not ignoring them when
generating checking macros.

--- a/xen/common/compat/memory.c
+++ b/xen/common/compat/memory.c
@@ -354,10 +354,13 @@ int compat_memory_op(unsigned int cmd, X
                 return -EFAULT;
 
 #define XLAT_vnuma_topology_info_HNDL_vdistance_h(_d_, _s_)		\
+            case XLAT_vnuma_topology_info_vdistance_pad:                \
             guest_from_compat_handle((_d_)->vdistance.h, (_s_)->vdistance.h)
 #define XLAT_vnuma_topology_info_HNDL_vcpu_to_vnode_h(_d_, _s_)		\
+            case XLAT_vnuma_topology_info_vcpu_to_vnode_pad:            \
             guest_from_compat_handle((_d_)->vcpu_to_vnode.h, (_s_)->vcpu_to_vnode.h)
 #define XLAT_vnuma_topology_info_HNDL_vmemrange_h(_d_, _s_)		\
+            case XLAT_vnuma_topology_info_vmemrange_pad:                \
             guest_from_compat_handle((_d_)->vmemrange.h, (_s_)->vmemrange.h)
 
             XLAT_vnuma_topology_info(nat.vnuma, &cmp.vnuma);
--- a/xen/tools/get-fields.sh
+++ b/xen/tools/get-fields.sh
@@ -218,7 +218,7 @@ for line in sys.stdin.readlines():
 				fi
 				;;
 			[\,\;])
-				if [ $level = 2 -a -n "$(echo $id | $SED 's,^_pad[[:digit:]]*,,')" ]
+				if [ $level = 2 -a -n "$(echo $id | $SED 's,_\?pad[[:digit:]]*,,')" ]
 				then
 					if [ $kind = union ]
 					then
@@ -347,7 +347,7 @@ build_body ()
 			fi
 			;;
 		[\,\;])
-			if [ $level = 2 -a -n "$(echo $id | $SED 's,^_pad[[:digit:]]*,,')" ]
+			if [ $level = 2 -a -n "$(echo $id | $SED 's,_\?pad[[:digit:]]*,,')" ]
 			then
 				if [ -z "$array" -a -z "$array_type" ]
 				then
@@ -437,7 +437,7 @@ check_field ()
 				id=$token
 				;;
 			[\,\;])
-				if [ $level = 2 -a -n "$(echo $id | $SED 's,^_pad[[:digit:]]*,,')" ]
+				if [ $level = 2 -a -n "$(echo $id | $SED 's,_\?pad[[:digit:]]*,,')" ]
 				then
 					check_field $1 $2 $3.$id "$fields"
 					test "$token" != ";" || fields= id=
@@ -491,7 +491,7 @@ build_check ()
 			test $level != 2 -o $arrlvl != 1 || id=$token
 			;;
 		[\,\;])
-			if [ $level = 2 -a -n "$(echo $id | $SED 's,^_pad[[:digit:]]*,,')" ]
+			if [ $level = 2 -a -n "$(echo $id | $SED 's,_\?pad[[:digit:]]*,,')" ]
 			then
 				check_field $kind $1 $id "$fields"
 				test "$token" != ";" || fields= id=