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[73.78.62.130]) by smtp.googlemail.com with ESMTPSA id o12-20020a92a80c000000b002dcd35bb030sm2342604ilh.74.2022.07.17.23.38.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Jul 2022 23:38:51 -0700 (PDT) From: Jim Cromie To: jbaron@akamai.com Date: Mon, 18 Jul 2022 00:36:12 -0600 Message-Id: <20220718063641.9179-29-jim.cromie@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220718063641.9179-1-jim.cromie@gmail.com> References: <20220718063641.9179-1-jim.cromie@gmail.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 26/39] drm_print: prefer bare printk KERN_DEBUG on generic fn X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jim Cromie , nouveau@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" drm_print.c calls pr_debug() just once, from __drm_printfn_debug(), which is a generic/service fn. The callsite is compile-time enabled by DEBUG in both DYNAMIC_DEBUG=y/n builds. For dyndbg builds, reverting this callsite back to bare printk is correcting a few anti-features: 1- callsite is generic, serves multiple drm users. it is soft-wired on currently by #define DEBUG could accidentally: #> echo -p > /proc/dynamic_debug/control 2- optional "decorations" by dyndbg are unhelpful/misleading here, they describe only the generic site, not end users IOW, 1,2 are unhelpful at best, and possibly confusing. reverting yields a nominal data and text shrink: text data bss dec hex filename 462583 36604 54592 553779 87333 /kernel/drivers/gpu/drm/drm.ko 462515 36532 54592 553639 872a7 -dirty/kernel/drivers/gpu/drm/drm.ko Signed-off-by: Jim Cromie --- drivers/gpu/drm/drm_print.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index effb95b3c2bf..e0de79a22255 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -23,8 +23,6 @@ * Rob Clark */ -#define DEBUG /* for pr_debug() */ - #include #include @@ -185,7 +183,8 @@ EXPORT_SYMBOL(__drm_printfn_info); void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf) { - pr_debug("%s %pV", p->prefix, vaf); + /* pr_debug callsite decorations are unhelpful here */ + printk(KERN_DEBUG "%s %pV", p->prefix, vaf); } EXPORT_SYMBOL(__drm_printfn_debug);