Fix race between cat /proc/*/wchan and rmmod et al

[linux-2.6-block.git] / kernel / kallsyms.c

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index f66da025cb7f40cb90ddeabc2bffde4878bdf02b..4e2ec191a127068f893e2b58f3662ec501872618 100644 (file)
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -269,6 +269,23 @@ const char *kallsyms_lookup(unsigned long addr,
        return NULL;
 }
 
+int lookup_symbol_name(unsigned long addr, char *symname)
+{
+       symname[0] = '\0';
+       symname[KSYM_NAME_LEN] = '\0';
+
+       if (is_ksym_addr(addr)) {
+               unsigned long pos;
+
+               pos = get_symbol_pos(addr, NULL, NULL);
+               /* Grab name */
+               kallsyms_expand_symbol(get_symbol_offset(pos), symname);
+               return 0;
+       }
+       /* see if it's in a module */
+       return lookup_module_symbol_name(addr, symname);
+}
+
 /* Look up a kernel symbol and return it in a text buffer. */
 int sprint_symbol(char *buffer, unsigned long address)
 {