linux-kernel - [PATCH] dma-debug: fix debugfs initialization order

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Date:   Thu, 22 Jul 2021 11:18:18 +0200
From:   Anthony Iliopoulos <ailiop@...e.com>
To:     Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dma-debug: fix debugfs initialization order

Due to link order, dma_debug_init is called before debugfs has a chance
to initialize (via debugfs_init which also happens in the core initcall
stage), so the directories for dma-debug are never created.

Move the dma_debug_init initcall from core to postcore stage so that
debugfs will already be initialized by the time this is called, making
it oblivious to link-ordering.

Fixes: 15b28bbcd567 ("dma-debug: move initialization to common code")
Signed-off-by: Anthony Iliopoulos <ailiop@...e.com>
---
 kernel/dma/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index 14de1271463f..49d80ef7f995 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -915,7 +915,7 @@ static int dma_debug_init(void)
 	pr_info("debugging enabled by kernel config\n");
 	return 0;
 }
-core_initcall(dma_debug_init);
+postcore_initcall(dma_debug_init);
 
 static __init int dma_debug_cmdline(char *str)
 {
-- 
2.32.0