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[73.78.62.130]) by smtp.googlemail.com with ESMTPSA id x3-20020a056602160300b006bba42f7822sm6408213iow.52.2022.12.05.16.34.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Dec 2022 16:34:57 -0800 (PST) From: Jim Cromie To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Cc: jani.nikula@intel.com, ville.syrjala@linux.intel.com, daniel.vetter@ffwll.ch, seanpaul@chromium.org, robdclark@gmail.com, jbaron@akamai.com, gregkh@linuxfoundation.org, Jim Cromie Subject: [RFC PATCH 02/17] test-dyndbg: show that DEBUG enables prdbgs at compiletime Date: Mon, 5 Dec 2022 17:34:09 -0700 Message-Id: <20221206003424.592078-3-jim.cromie@gmail.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221206003424.592078-1-jim.cromie@gmail.com> References: <20221206003424.592078-1-jim.cromie@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Dyndbg is required to enable prdbgs at compile-time if DEBUG is defined. Show this works; add the defn to test_dynamic_debug.c, and manually inspect/verify its effect at module load: [ 15.292810] dyndbg: module:test_dynamic_debug attached 4 classes [ 15.293189] dyndbg: 32 debug prints in module test_dynamic_debug [ 15.293715] test_dd: init start [ 15.293716] test_dd: doing categories [ 15.293716] test_dd: LOW msg ... [ 15.293733] test_dd: L6 msg [ 15.293733] test_dd: L7 msg [ 15.293733] test_dd: init done NOTES: As is observable above, define DEBUG enables all prdbgs, including those in mod_init-fn, and more notably, the "class"d ones (callsites with non-default class_ids). This differs from the >control interface, which in order to properly protect a client's class'd prdbgs, requires a "class FOO" in queries to change them. Note that the DEBUG is in the module source file. This yields an occaisional surprise; the following disables all the compile-time enabled plain prdbgs, but leaves the class'd ones enabled. :#> modprobe test_dynamic_debug dyndbg=3D=3D_ Signed-off-by: Jim Cromie --- lib/test_dynamic_debug.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c index a01f0193a419..9d48689dc0ab 100644 --- a/lib/test_dynamic_debug.c +++ b/lib/test_dynamic_debug.c @@ -8,6 +8,8 @@ =20 #define pr_fmt(fmt) "test_dd: " fmt =20 +#define DEBUG + #include =20 /* run tests by reading or writing sysfs node: do_prints */ --=20 2.38.1