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module: initialize module dynamic debug later

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We should initialize the module dynamic debug datastructures
only after determining that the module is not loaded yet. This
fixes a bug that introduced in 2.6.35-rc2, where when a trying
to load a module twice, we also load it's dynamic printing data
twice which causes all sorts of nasty issues. Also handle
the dynamic debug cleanup later on failure.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (removed a #ifdef)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yehuda Sadeh 2010-07-03 13:07:35 +10:00 • committed by Linus Torvalds
parent e3668dd83b
commit ff49d74ad3
3 changed files with 18 additions and 11 deletions
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2
lib/dynamic_debug.c
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@ -692,7 +692,7 @@ static void ddebug_table_free(struct ddebug_table *dt)
* Called in response to a module being unloaded. Removes
* any ddebug_table's which point at the module.
*/
int ddebug_remove_module(char *mod_name)
int ddebug_remove_module(const char *mod_name)
{
struct ddebug_table *dt, *nextdt;
int ret = -ENOENT;