Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Byungchul Park <byungchul.park@lge.com>
To:     linux-kernel@vger.kernel.org
Cc:     torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com,
        linux-ide@vger.kernel.org, adilger.kernel@dilger.ca,
        linux-ext4@vger.kernel.org, mingo@redhat.com, peterz@infradead.org,
        will@kernel.org, tglx@linutronix.de, rostedt@goodmis.org,
        joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch,
        duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org,
        tytso@mit.edu, willy@infradead.org, david@fromorbit.com,
        amir73il@gmail.com, gregkh@linuxfoundation.org,
        kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org,
        mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org,
        vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com,
        dennis@kernel.org, cl@linux.com, penberg@kernel.org,
        rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org,
        linux-block@vger.kernel.org, paolo.valente@linaro.org,
        josef@toxicpanda.com, linux-fsdevel@vger.kernel.org,
        viro@zeniv.linux.org.uk, jack@suse.cz, jlayton@kernel.org,
        dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org,
        dri-devel@lists.freedesktop.org, rodrigosiqueiramelo@gmail.com,
        melissa.srw@gmail.com, hamohammed.sa@gmail.com,
        42.hyeyoo@gmail.com, chris.p.wilson@intel.com,
        gwan-gyeong.mun@intel.com
Subject: [PATCH RFC v7 16/23] dept: Apply sdt_might_sleep_strong() to dma fence wait
Date:   Mon,  9 Jan 2023 12:33:44 +0900
Message-Id: <1673235231-30302-17-git-send-email-byungchul.park@lge.com>
In-Reply-To: <1673235231-30302-1-git-send-email-byungchul.park@lge.com>
References: <1673235231-30302-1-git-send-email-byungchul.park@lge.com>
Precedence: bulk

Makes Dept able to track dma fence waits.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
 drivers/dma-buf/dma-fence.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 406b4e2..dd190cf 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -16,6 +16,7 @@
 #include <linux/dma-fence.h>
 #include <linux/sched/signal.h>
 #include <linux/seq_file.h>
+#include <linux/dept_sdt.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/dma_fence.h>
@@ -782,6 +783,7 @@ struct default_wait_cb {
 	cb.task = current;
 	list_add(&cb.base.node, &fence->cb_list);
 
+	sdt_might_sleep_strong(NULL);
 	while (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) && ret > 0) {
 		if (intr)
 			__set_current_state(TASK_INTERRUPTIBLE);
@@ -795,6 +797,7 @@ struct default_wait_cb {
 		if (ret > 0 && intr && signal_pending(current))
 			ret = -ERESTARTSYS;
 	}
+	sdt_might_sleep_finish();
 
 	if (!list_empty(&cb.base.node))
 		list_del(&cb.base.node);
@@ -884,6 +887,7 @@ struct default_wait_cb {
 		}
 	}
 
+	sdt_might_sleep_strong(NULL);
 	while (ret > 0) {
 		if (intr)
 			set_current_state(TASK_INTERRUPTIBLE);
@@ -898,6 +902,7 @@ struct default_wait_cb {
 		if (ret > 0 && intr && signal_pending(current))
 			ret = -ERESTARTSYS;
 	}
+	sdt_might_sleep_finish();
 
 	__set_current_state(TASK_RUNNING);
 
-- 
1.9.1