pstree: Move thread_core allocation to generic routine

It's not arch dependent by any means, thus it looks
strange that we allocate it in arch/ but free in
pstree.c.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

arch/arm/crtools.c

@@ -154,7 +154,6 @@ int arch_alloc_thread_info(CoreEntry *core)
 	ThreadInfoArm *ti_arm;
 	UserArmRegsEntry *gpregs;
 	UserArmVfpstateEntry *fpstate;
-	ThreadCoreEntry *thread_core;
 
 	ti_arm = xmalloc(sizeof(*ti_arm));
 	if (!ti_arm)
@@ -176,12 +175,6 @@ int arch_alloc_thread_info(CoreEntry *core)
 	if (!fpstate->vfp_regs)
 		goto err;
 
-	thread_core = xmalloc(sizeof(*thread_core));
-	if (!thread_core)
-		goto err;
-	thread_core_entry__init(thread_core);
-	core->thread_core = thread_core;
-
 	return 0;
 err:
 	return -1;

arch/x86/crtools.c

@@ -232,7 +232,6 @@ int arch_alloc_thread_info(CoreEntry *core)
 	ThreadInfoX86 *thread_info;
 	UserX86RegsEntry *gpregs;
 	UserX86FpregsEntry *fpregs;
-	ThreadCoreEntry *thread_core;
 
 	thread_info = xmalloc(sizeof(*thread_info));
 	if (!thread_info)
@@ -240,12 +239,6 @@ int arch_alloc_thread_info(CoreEntry *core)
 	thread_info_x86__init(thread_info);
 	core->thread_info = thread_info;
 
-	thread_core = xmalloc(sizeof(*thread_core));
-	if (!thread_core)
-		goto err;
-	thread_core_entry__init(thread_core);
-	core->thread_core = thread_core;
-
 	gpregs = xmalloc(sizeof(*gpregs));
 	if (!gpregs)
 		goto err;

pstree.c

@@ -39,8 +39,16 @@ CoreEntry *core_entry_alloc(int alloc_thread_info, int alloc_tc)
 	core->mtype = CORE_ENTRY__MARCH;
 
 	if (alloc_thread_info) {
+		ThreadCoreEntry *thread_core;
+
 		if (arch_alloc_thread_info(core))
 			goto err;
+
+		thread_core = xmalloc(sizeof(*thread_core));
+		if (!thread_core)
+			goto err;
+		thread_core_entry__init(thread_core);
+		core->thread_core = thread_core;
 	}
 
 	if (alloc_tc) {