The patch titled
linux-kernel-markers-support-multiple-probes update
has been added to the -mm tree. Its filename is
linux-kernel-markers-support-multiple-probes-update.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
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
git-x86.patch
add-cmpxchg_local-to-asm-generic-for-per-cpu-atomic-operations.patch
add-cmpxchg64-and-cmpxchg64_local-to-alpha.patch
add-cmpxchg64-and-cmpxchg64_local-to-mips.patch
add-cmpxchg64-and-cmpxchg64_local-to-powerpc.patch
add-cmpxchg64-and-cmpxchg64_local-to-x86_64.patch
add-cmpxchg_local-to-arm.patch
add-cmpxchg_local-to-avr32.patch
add-cmpxchg_local-to-blackfin-replace-__cmpxchg-by-generic-cmpxchg.patch
add-cmpxchg_local-to-cris.patch
add-cmpxchg_local-to-frv.patch
add-cmpxchg_local-to-h8300.patch
add-cmpxchg_local-cmpxchg64-and-cmpxchg64_local-to-ia64.patch
new-cmpxchg_local-optimized-for-up-case-for-m32r.patch
fix-m32r-__xchg.patch
m32r-build-fix-of-arch-m32r-kernel-smpbootc.patch
local_t-m32r-use-architecture-specific-cmpxchg_local.patch
add-cmpxchg_local-to-m86k.patch
add-cmpxchg_local-to-m68knommu.patch
add-cmpxchg_local-to-parisc.patch
add-cmpxchg_local-to-ppc.patch
add-cmpxchg_local-to-s390.patch
add-cmpxchg_local-to-sparc-move-__cmpxchg-to-systemh.patch
add-cmpxchg_local-to-sparc64.patch
add-cmpxchg_local-to-v850.patch
add-cmpxchg_local-to-xtensa.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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