[RFC PATCH 05/09] robust VM per_cpu module

[Steven Rostedt]

This patch performs a check on the return value of percpu_modcopy
for the module load.

Signed-off-by: Steven Rostedt <rostedt at goodmis.org>

Index: linux-2.6.16-test/kernel/module.c
===================================================================
--- linux-2.6.16-test.orig/kernel/module.c	2006-05-17 04:32:28.000000000 -0400
+++ linux-2.6.16-test/kernel/module.c	2006-05-17 04:57:53.000000000 -0400
@@ -1819,8 +1819,11 @@ static struct module *load_module(void _
 	sort_extable(extable, extable + mod->num_exentries);

 	/* Finally, copy percpu area over. */
-	percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
-		       sechdrs[pcpuindex].sh_size);
+	err = percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
+			     sechdrs[pcpuindex].sh_size);
+
+	if (err < 0)
+		goto cleanup;

 	add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);