The patch titled
linux-kernel-markers-support-multiple-probes update
has been removed from the -mm tree. Its filename was
linux-kernel-markers-support-multiple-probes-update.patch
This patch was dropped because it was folded into linux-kernel-markers-support-multiple-probes.patch
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: linux-kernel-markers-support-multiple-probes update
From: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx>
- Add comments requested by Andrew.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/marker.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff -puN kernel/marker.c~linux-kernel-markers-support-multiple-probes-update kernel/marker.c
--- a/kernel/marker.c~linux-kernel-markers-support-multiple-probes-update
+++ a/kernel/marker.c
@@ -49,6 +49,7 @@ static DEFINE_MUTEX(markers_mutex);
* between two consecutive operation (add or remove) on a given marker. It is
* also used to delay the free of multiple probes array until a quiescent state
* is reached.
+ * marker entries modifications are protected by the markers_mutex.
*/
struct marker_entry {
struct hlist_node hlist;
@@ -102,6 +103,11 @@ void marker_probe_cb(const struct marker
va_list args;
char ptype;
+ /*
+ * disabling preemption to make sure the teardown of the callbacks can
+ * be done correctly when they are in modules and they insure RCU read
+ * coherency.
+ */
preempt_disable();
ptype = ACCESS_ONCE(mdata->ptype);
if (likely(!ptype)) {
@@ -196,7 +202,7 @@ static void free_old_closure(struct rcu_
entry->rcu_pending = 0;
}
-static inline void debug_print_probes(struct marker_entry *entry)
+static void debug_print_probes(struct marker_entry *entry)
{
int i;
_
Patches currently in -mm which might be from mathieu.desnoyers@xxxxxxxxxx are
origin.patch
modules-handle-symbols-that-have-a-zero-value.patch
linux-kernel-markers-support-multiple-probes.patch
linux-kernel-markers-support-multiple-probes-update.patch
linux-kernel-markers-create-modpost-file.patch
-
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