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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-02 19:24:44 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-02 19:24:44 (GMT) |
| commit | bd1d462e13b278fc57752d0b9b15040e60e561a0 (patch) | |
| tree | e2fdf1c18a93aab02830bcb8a5db8cdddfbb63a8 /kernel/res_counter.c | |
| parent | d5c38b137ac8a6e3dbed13bc494d60df5b69dfc4 (diff) | |
| parent | 62aa2b537c6f5957afd98e29f96897419ed5ebab (diff) | |
| download | linux-fsl-qoriq-bd1d462e13b278fc57752d0b9b15040e60e561a0.tar.xz | |
Merge 3.3-rc2 into the driver-core-next branch.
This was done to resolve a merge and build problem with the
drivers/acpi/processor_driver.c file.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/res_counter.c')
| -rw-r--r-- | kernel/res_counter.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/res_counter.c b/kernel/res_counter.c index 6d269cc..d508363 100644 --- a/kernel/res_counter.c +++ b/kernel/res_counter.c @@ -66,6 +66,31 @@ done: return ret; } +int res_counter_charge_nofail(struct res_counter *counter, unsigned long val, + struct res_counter **limit_fail_at) +{ + int ret, r; + unsigned long flags; + struct res_counter *c; + + r = ret = 0; + *limit_fail_at = NULL; + local_irq_save(flags); + for (c = counter; c != NULL; c = c->parent) { + spin_lock(&c->lock); + r = res_counter_charge_locked(c, val); + if (r) + c->usage += val; + spin_unlock(&c->lock); + if (r < 0 && ret == 0) { + *limit_fail_at = c; + ret = r; + } + } + local_irq_restore(flags); + + return ret; +} void res_counter_uncharge_locked(struct res_counter *counter, unsigned long val) { if (WARN_ON(counter->usage < val)) |