When trying to bring IS_ACTIVE to linux/kconfig.h I thought it wouldn't
provide much value just encapsulating it in a boolean context. So I also
added the support for handling undefined macros as the IS_ENABLED()
counterpart. However the feedback received from Masahiro Yamada was that
it is too ugly, not providing much value. And just wrapping in a boolean
context is too dumb - we could simply open code it.
As detailed in commit
babaab2f4738 ("drm/i915: Encapsulate kconfig
constant values inside boolean predicates"), the IS_ACTIVE macro was
added to workaround a compilation warning. However after checking again
our current uses of IS_ACTIVE it turned out there is only
1 case in which it triggers a warning in clang (due
-Wconstant-logical-operand) and 2 in smatch. All the others
can simply use the shorter version, without wrapping it in any macro.
So here I'm dialing all the way back to simply removing the macro. That
single case hit by clang can be changed to make the constant come first,
so it doesn't think it's mask:
- if (context && CONFIG_DRM_I915_FENCE_TIMEOUT)
+ if (CONFIG_DRM_I915_FENCE_TIMEOUT && context)
As talked with Dan Carpenter, that logic will be added in smatch as
well, so it will also stop warning about it.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211005171728.3147094-1-lucas.demarchi@intel.com
intel_engine_has_semaphores(ce->engine))
__set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
- if (IS_ACTIVE(CONFIG_DRM_I915_REQUEST_TIMEOUT) &&
+ if (CONFIG_DRM_I915_REQUEST_TIMEOUT &&
ctx->i915->params.request_timeout_ms) {
unsigned int timeout_ms = ctx->i915->params.request_timeout_ms;
/* Track the mmo associated with the fenced vma */
vma->mmo = mmo;
- if (IS_ACTIVE(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND))
+ if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)
intel_wakeref_auto(&i915->ggtt.userfault_wakeref,
msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND));
static inline bool
intel_engine_has_preempt_reset(const struct intel_engine_cs *engine)
{
- if (!IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT))
+ if (!CONFIG_DRM_I915_PREEMPT_TIMEOUT)
return false;
return intel_engine_has_preemption(engine);
static inline bool
intel_engine_has_heartbeat(const struct intel_engine_cs *engine)
{
- if (!IS_ACTIVE(CONFIG_DRM_I915_HEARTBEAT_INTERVAL))
+ if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
return false;
if (intel_engine_is_virtual(engine))
void intel_engine_unpark_heartbeat(struct intel_engine_cs *engine)
{
- if (!IS_ACTIVE(CONFIG_DRM_I915_HEARTBEAT_INTERVAL))
+ if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
return;
next_heartbeat(engine);
static inline bool
intel_engine_has_timeslices(const struct intel_engine_cs *engine)
{
- if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (!CONFIG_DRM_I915_TIMESLICE_DURATION)
return false;
return engine->flags & I915_ENGINE_HAS_TIMESLICES;
engine->flags |= I915_ENGINE_HAS_SEMAPHORES;
if (can_preempt(engine)) {
engine->flags |= I915_ENGINE_HAS_PREEMPTION;
- if (IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (CONFIG_DRM_I915_TIMESLICE_DURATION)
engine->flags |= I915_ENGINE_HAS_TIMESLICES;
}
}
int err = 0;
/* Check that the heartbeat ticks at the desired rate. */
- if (!IS_ACTIVE(CONFIG_DRM_I915_HEARTBEAT_INTERVAL))
+ if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
return 0;
for_each_engine(engine, gt, id) {
int err = 0;
/* Check that we can turn off heartbeat and not interrupt VIP */
- if (!IS_ACTIVE(CONFIG_DRM_I915_HEARTBEAT_INTERVAL))
+ if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
return 0;
for_each_engine(engine, gt, id) {
* need to preempt the current task and replace it with another
* ready task.
*/
- if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (!CONFIG_DRM_I915_TIMESLICE_DURATION)
return 0;
obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
* but only a few of those requests, forcing us to rewind the
* RING_TAIL of the original request.
*/
- if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (!CONFIG_DRM_I915_TIMESLICE_DURATION)
return 0;
for_each_engine(engine, gt, id) {
* ELSP[1] is already occupied, so must rely on timeslicing to
* eject ELSP[0] in favour of the queue.)
*/
- if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (!CONFIG_DRM_I915_TIMESLICE_DURATION)
return 0;
obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
* We should not timeslice into a request that is marked with
* I915_REQUEST_NOPREEMPT.
*/
- if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
+ if (!CONFIG_DRM_I915_TIMESLICE_DURATION)
return 0;
if (igt_spinner_init(&spin, gt))
int err;
/* Preempt cancel non-preemptible spinner in ELSP0 */
- if (!IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT))
+ if (!CONFIG_DRM_I915_PREEMPT_TIMEOUT)
return 0;
if (!intel_has_reset_engine(arg->engine->gt))
struct i915_request *rq;
int err;
- if (!IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT))
+ if (!CONFIG_DRM_I915_PREEMPT_TIMEOUT)
return 0;
if (!intel_has_reset_engine(engine->gt))
* Check that we force preemption to occur by cancelling the previous
* context if it refuses to yield the GPU.
*/
- if (!IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT))
+ if (!CONFIG_DRM_I915_PREEMPT_TIMEOUT)
return 0;
if (!intel_has_reset_engine(gt))
unsigned long
i915_fence_context_timeout(const struct drm_i915_private *i915, u64 context)
{
- if (context && IS_ACTIVE(CONFIG_DRM_I915_FENCE_TIMEOUT))
+ if (CONFIG_DRM_I915_FENCE_TIMEOUT && context)
return msecs_to_jiffies_timeout(CONFIG_DRM_I915_FENCE_TIMEOUT);
return 0;
* completion. That requires having a good predictor for the request
* duration, which we currently lack.
*/
- if (IS_ACTIVE(CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT) &&
+ if (CONFIG_DRM_I915_MAX_REQUEST_BUSYWAIT &&
__i915_spin_request(rq, state))
goto out;
return timer_active(t) && !timer_pending(t);
}
-/*
- * This is a lookalike for IS_ENABLED() that takes a kconfig value,
- * e.g. CONFIG_DRM_I915_SPIN_REQUEST, and evaluates whether it is non-zero
- * i.e. whether the configuration is active. Wrapping up the config inside
- * a boolean context prevents clang and smatch from complaining about potential
- * issues in confusing logical-&& with bitwise-& for constants.
- *
- * Sadly IS_ENABLED() itself does not work with kconfig values.
- *
- * Returns 0 if @config is 0, 1 if set to any value.
- */
-#define IS_ACTIVE(config) ((config) != 0)
-
#endif /* !__I915_UTILS_H */
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