aio: remove no longer needed preempt_disable()
Based on feedback from Jens Axboe on 263782c1c95bbddbb022dc092fd89a36bb8d5577,
clean up get/put_reqs_available() to remove the no longer needed preempt_disable()
and preempt_enable() pair.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: Jens Axboe <axboe@kernel.dk>
diff --git a/fs/aio.c b/fs/aio.c
index 8216aa0..9ce9e8e 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -814,10 +814,8 @@
struct kioctx_cpu *kcpu;
unsigned long flags;
- preempt_disable();
- kcpu = this_cpu_ptr(ctx->cpu);
-
local_irq_save(flags);
+ kcpu = this_cpu_ptr(ctx->cpu);
kcpu->reqs_available += nr;
while (kcpu->reqs_available >= ctx->req_batch * 2) {
@@ -826,7 +824,6 @@
}
local_irq_restore(flags);
- preempt_enable();
}
static bool get_reqs_available(struct kioctx *ctx)
@@ -835,10 +832,8 @@
bool ret = false;
unsigned long flags;
- preempt_disable();
- kcpu = this_cpu_ptr(ctx->cpu);
-
local_irq_save(flags);
+ kcpu = this_cpu_ptr(ctx->cpu);
if (!kcpu->reqs_available) {
int old, avail = atomic_read(&ctx->reqs_available);
@@ -858,7 +853,6 @@
kcpu->reqs_available--;
out:
local_irq_restore(flags);
- preempt_enable();
return ret;
}