The patch titled
Subject: res_counter: allow charge failure pointer to be null
has been added to the -mm tree. Its filename is
res_counter-allow-charge-failure-pointer-to-be-null.patch
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------------------------------------------------------
From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Subject: res_counter: allow charge failure pointer to be null
So that callers of res_counter_charge() don't have to create and pass this
pointer even if they aren't interested in it.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Paul Menage <paul@xxxxxxxxxxxxxx>
Cc: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Aditya Kali <adityakali@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Tim Hockin <thockin@xxxxxxxxxx>
Cc: Tejun Heo <htejun@xxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxx>
---
kernel/res_counter.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN kernel/res_counter.c~res_counter-allow-charge-failure-pointer-to-be-null kernel/res_counter.c
--- a/kernel/res_counter.c~res_counter-allow-charge-failure-pointer-to-be-null
+++ a/kernel/res_counter.c
@@ -43,14 +43,16 @@ int res_counter_charge_until(struct res_
unsigned long flags;
struct res_counter *c, *u;
- *limit_fail_at = NULL;
+ if (limit_fail_at)
+ *limit_fail_at = NULL;
local_irq_save(flags);
for (c = counter; c != limit; c = c->parent) {
spin_lock(&c->lock);
ret = res_counter_charge_locked(c, val);
spin_unlock(&c->lock);
if (ret < 0) {
- *limit_fail_at = c;
+ if (limit_fail_at)
+ *limit_fail_at = c;
goto undo;
}
}
_
Subject: Subject: res_counter: allow charge failure pointer to be null
Patches currently in -mm which might be from fweisbec@xxxxxxxxx are
origin.patch
linux-next.patch
cgroups-more-safe-tasklist-locking-in-cgroup_attach_proc.patch
cgroups-fix-ordering-of-calls-in-cgroup_attach_proc.patch
cgroups-add-res_counter_write_u64-api.patch
cgroups-new-resource-counter-inheritance-api.patch
cgroups-add-previous-cgroup-in-can_attach_task-attach_task-callbacks.patch
cgroups-new-cancel_attach_task-subsystem-callback.patch
cgroups-ability-to-stop-res-charge-propagation-on-bounded-ancestor.patch
cgroups-add-res-counter-common-ancestor-searching.patch
res_counter-allow-charge-failure-pointer-to-be-null.patch
cgroups-pull-up-res-counter-charge-failure-interpretation-to-caller.patch
cgroups-allow-subsystems-to-cancel-a-fork.patch
cgroups-add-a-task-counter-subsystem.patch
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