Messages in this thread Patch in this message | | | From | Jim Cromie <> | Subject | [PATCH 13/25] dynamic_debug: apply_pending_queries() from ddebug_add_module() | Date | Mon, 25 Jul 2011 15:42:38 -0600 |
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When a module is loaded, ddebug_add_module calls apply_pending_queries to scan pending_queries list and call ddebug_change to apply them. Pending queries remain on the list after they're applied, so they persist through modprobe-rmmod cycles during debugging.
With this change, the loaded module's pr_debugs are enabled when its module_init is invoked, which is not possible otherwize.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com> --- lib/dynamic_debug.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 4135bf5..7e4f919 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -866,6 +866,21 @@ static const struct file_operations ddebug_proc_fops = { .write = ddebug_proc_write }; +/* apply matching queries in pending-queries list */ +static void apply_pending_queries(struct ddebug_table *dt) +{ + struct pending_query *pq, *pqnext; + int nfound; + char *qstr; + + list_for_each_entry_safe(pq, pqnext, &pending_queries, link) { + nfound = ddebug_change(&pq->query, pq->flags, pq->mask); + qstr = show_pending_query(pq); + pr_debug("%s: %s\n", (nfound) ? "applied" : "no-match", qstr); + kfree(qstr); + } +} + /* * Allocate a new ddebug_table for the given module * and add it to the global list. @@ -890,6 +905,7 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n, mutex_lock(&ddebug_lock); list_add_tail(&dt->link, &ddebug_tables); + apply_pending_queries(dt); mutex_unlock(&ddebug_lock); if (verbose) -- 1.7.4.1
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