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([2601:1c0:5780:9200:b90d:2938:bd7a:289f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29dae4cf97fsm167022355ad.25.2025.12.09.20.24.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Dec 2025 20:24:48 -0800 (PST) Message-ID: <89b08d9a-9f96-40f0-9ae6-e54b16b65879@gmail.com> Date: Tue, 9 Dec 2025 20:24:47 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] fbtft: Make sysfs and dev_*() logging conditional on FB_DEVICE To: Thomas Zimmermann , linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-omap@vger.kernel.org Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, andy@kernel.org, deller@gmx.de, gregkh@linuxfoundation.org References: <20251209042744.7875-1-chintanlike@gmail.com> <20251209042744.7875-2-chintanlike@gmail.com> <329423e8-d778-4f30-904a-825b1be72ce2@suse.de> Content-Language: en-US From: Chintan Patel In-Reply-To: <329423e8-d778-4f30-904a-825b1be72ce2@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Thomas, On 12/8/25 23:25, Thomas Zimmermann wrote: > Hi > > Am 09.12.25 um 05:27 schrieb Chintan Patel: >> The fbtft core and sysfs implementation unconditionally dereference >> fb_info->dev and register sysfs attributes. When FB_DEVICE=n, these >> fields are unavailable, leading to build failures. >> >> This patch wraps all sysfs attribute creation/removal and dev_dbg/ >> dev_info >> logging in #ifdef CONFIG_FB_DEVICE, with pr_*() fallbacks for the >> non-FB_DEVICE case. This makes fbtft fully buildable when FB_DEVICE is >> disabled. >> >> Signed-off-by: Chintan Patel >> --- >>   drivers/staging/fbtft/fbtft-core.c  | 20 ++++++++++++++++++-- >>   drivers/staging/fbtft/fbtft-sysfs.c |  8 ++++++++ >>   2 files changed, 26 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/ >> fbtft/fbtft-core.c >> index 9e7b84071174..dc967bdeabe8 100644 >> --- a/drivers/staging/fbtft/fbtft-core.c >> +++ b/drivers/staging/fbtft/fbtft-core.c >> @@ -365,9 +365,14 @@ static int fbtft_fb_setcolreg(unsigned int regno, >> unsigned int red, >>       unsigned int val; >>       int ret = 1; >> +#ifdef CONFIG_FB_DEVICE >>       dev_dbg(info->dev, > > Rather use fb_dbg() [1] and similar helpers for logging. They only need > the info pointer and do the correct output by themselves. > > [1] https://elixir.bootlin.com/linux/v6.18/source/include/linux/fb.h#L895 Thank you for this pointer - I actually didnt now this existed. Will do v2.