linux-kernel - Re: [PATCH] pds_core: fix linking without CONFIG_DEBUG

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Date:   Mon, 1 May 2023 15:35:02 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Shannon Nelson <shannon.nelson@....com>,
        Brett Creeley <brett.creeley@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pds_core: fix linking without CONFIG_DEBUG_FS

On Mon,  1 May 2023 17:06:14 +0200 Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The debugfs.o file is only built when the fs is enabled:
> 
> main.c:(.text+0x47c): undefined reference to `pdsc_debugfs_del_dev'
> main.c:(.text+0x8dc): undefined reference to `pdsc_debugfs_add_dev'
> main.c:(.exit.text+0x14): undefined reference to `pdsc_debugfs_destroy'
> main.c:(.init.text+0x8): undefined reference to `pdsc_debugfs_create'
> dev.c:(.text+0x988): undefined reference to `pdsc_debugfs_add_ident'
> core.c:(.text+0x6b0): undefined reference to `pdsc_debugfs_del_qcq'
> core.c:(.text+0x998): undefined reference to `pdsc_debugfs_add_qcq'
> core.c:(.text+0xf0c): undefined reference to `pdsc_debugfs_add_viftype'
> 
> Add dummy helper functions for these interfaces.

Debugfs should wrap itself. Doesn't this work:

diff --git a/drivers/net/ethernet/amd/pds_core/Makefile b/drivers/net/ethernet/amd/pds_core/Makefile
index 0abc33ce826c..54d1d5b375ce 100644
--- a/drivers/net/ethernet/amd/pds_core/Makefile
+++ b/drivers/net/ethernet/amd/pds_core/Makefile
@@ -9,6 +9,5 @@ pds_core-y := main.o \
 	      dev.o \
 	      adminq.o \
 	      core.o \
-	      fw.o
-
-pds_core-$(CONFIG_DEBUG_FS) += debugfs.o
+	      fw.o \
+	      debugfs.o