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Date: Thu, 6 Jan 2022 22:29:33 -0700 From: Jim Cromie <jim.cromie@...il.com> To: jbaron@...mai.com, gregkh@...uxfoundation.org, linux@...musvillemoes.dk, rostedt@...dmis.org, mathieu.desnoyers@...icios.com, daniel.vetter@...ll.ch, seanpaul@...omium.org, robdclark@...il.com, dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org, intel-gvt-dev@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org Cc: quic_saipraka@...cinc.com, will@...nel.org, catalin.marinas@....com, quic_psodagud@...cinc.com, maz@...nel.org, arnd@...db.de, linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org, mingo@...hat.com, jim.cromie@...il.com Subject: [PATCH v11 10/19] drm_print: interpose drm_dev_dbg, __drm_dbg with forwarding macros drm_dev_dbg() & _drm_dbg() sit below the categorized layer of the DRM debug API, and thus implement most of it. These are good places to insert dynamic-debug jump-label mechanics, allowing DRM to avoid the runtime cost of drm_debug_enabled(). Set up for this by changing the func names by adding '__' prefixes, and define forwarding macros to the new names. no functional changes. memory cost baseline: (unchanged) bash-5.1# drms_load [ 9.220389] dyndbg: 1 debug prints in module drm [ 9.224426] ACPI: bus type drm_connector registered [ 9.302192] dyndbg: 2 debug prints in module ttm [ 9.305033] dyndbg: 8 debug prints in module video [ 9.627563] dyndbg: 127 debug prints in module i915 [ 9.721505] AMD-Vi: AMD IOMMUv2 functionality not available on this system - This is not a bug. [ 10.091345] dyndbg: 2196 debug prints in module amdgpu [ 10.106589] [drm] amdgpu kernel modesetting enabled. [ 10.107270] amdgpu: CRAT table not found [ 10.107926] amdgpu: Virtual CRAT table created for CPU [ 10.108398] amdgpu: Topology: Add CPU node [ 10.168507] dyndbg: 3 debug prints in module wmi [ 10.329587] dyndbg: 3 debug prints in module nouveau Signed-off-by: Jim Cromie <jim.cromie@...il.com> --- drivers/gpu/drm/drm_print.c | 10 +++++----- include/drm/drm_print.h | 9 +++++++-- 2 files changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index cfcb89ffd89d..5dd6713c14f2 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -259,8 +259,8 @@ void drm_dev_printk(const struct device *dev, const char *level, } EXPORT_SYMBOL(drm_dev_printk); -void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, - const char *format, ...) +void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category, + const char *format, ...) { struct va_format vaf; va_list args; @@ -283,9 +283,9 @@ void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, } va_end(args); } -EXPORT_SYMBOL(drm_dev_dbg); +EXPORT_SYMBOL(__drm_dev_dbg); -void __drm_dbg(enum drm_debug_category category, const char *format, ...) +void ___drm_dbg(enum drm_debug_category category, const char *format, ...) { struct va_format vaf; va_list args; @@ -304,7 +304,7 @@ void __drm_dbg(enum drm_debug_category category, const char *format, ...) va_end(args); } -EXPORT_SYMBOL(__drm_dbg); +EXPORT_SYMBOL(___drm_dbg); void __drm_err(const char *format, ...) { diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index b4355bfd7888..f8fa5af11310 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -334,7 +334,7 @@ __printf(3, 4) void drm_dev_printk(const struct device *dev, const char *level, const char *format, ...); __printf(3, 4) -void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, +void __drm_dev_dbg(const struct device *dev, enum drm_debug_category category, const char *format, ...); /** @@ -383,6 +383,9 @@ void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, } \ }) +#define drm_dev_dbg(dev, eCat, fmt, ...) \ + __drm_dev_dbg(dev, eCat, fmt, ##__VA_ARGS__) + /** * DRM_DEV_DEBUG() - Debug output for generic drm code * @@ -484,10 +487,12 @@ void drm_dev_dbg(const struct device *dev, enum drm_debug_category category, */ __printf(2, 3) -void __drm_dbg(enum drm_debug_category category, const char *format, ...); +void ___drm_dbg(enum drm_debug_category category, const char *format, ...); __printf(1, 2) void __drm_err(const char *format, ...); +#define __drm_dbg(fmt, ...) ___drm_dbg(fmt, ##__VA_ARGS__) + /* Macros to make printk easier */ #define _DRM_PRINTK(once, level, fmt, ...) \ -- 2.33.1
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