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drm/i915: Encapsulate kconfig constant values inside boolean predicates

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Avoid angering clang and smatch by using a constant value in a '&&' test,
by forcing that constant value into a boolean.

E.g.,
drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c:159:13: warning: use of logical '&&' with constant operand [-Wconstant-logical-operand]
	if (!delay && CONFIG_DRM_I915_PREEMPT_TIMEOUT) {
                      ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191025135943.12524-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-10-25 14:59:42 +01:00
parent 2d69c42e37
commit babaab2f47
5 changed files with 19 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/gpu/drm/i915/gem/i915_gem_context.c
View file

@ -325,7 +325,8 @@ static bool __cancel_engine(struct intel_engine_cs *engine)
* kill the banned context, we fallback to doing a local reset
* instead.
*/
if (CONFIG_DRM_I915_PREEMPT_TIMEOUT && !intel_engine_pulse(engine))
if (IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT) &&
!intel_engine_pulse(engine))
return true;
/* If we are unable to send a pulse, try resetting this engine. */

2
drivers/gpu/drm/i915/gem/i915_gem_mman.c
View file

@ -312,7 +312,7 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf)
list_add(&obj->userfault_link, &i915->ggtt.userfault_list);
mutex_unlock(&i915->ggtt.vm.mutex);
if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)
if (IS_ACTIVE(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND))
intel_wakeref_auto(&i915->ggtt.userfault_wakeref,
msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND));

4
drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
View file

@ -133,7 +133,7 @@ static void heartbeat(struct work_struct *wrk)
void intel_engine_unpark_heartbeat(struct intel_engine_cs *engine)
{
if (!CONFIG_DRM_I915_HEARTBEAT_INTERVAL)
if (!IS_ACTIVE(CONFIG_DRM_I915_HEARTBEAT_INTERVAL))
return;
next_heartbeat(engine);
@ -156,7 +156,7 @@ int intel_engine_set_heartbeat(struct intel_engine_cs *engine,
int err;
/* Send one last pulse before to cleanup persistent hogs */
if (!delay && CONFIG_DRM_I915_PREEMPT_TIMEOUT) {
if (!delay && IS_ACTIVE(CONFIG_DRM_I915_PREEMPT_TIMEOUT)) {
err = intel_engine_pulse(engine);
if (err)
return err;

2
drivers/gpu/drm/i915/i915_request.c
View file

@ -1447,7 +1447,7 @@ long i915_request_wait(struct i915_request *rq,
* completion. That requires having a good predictor for the request
* duration, which we currently lack.
*/
if (CONFIG_DRM_I915_SPIN_REQUEST &&
if (IS_ACTIVE(CONFIG_DRM_I915_SPIN_REQUEST) &&
__i915_spin_request(rq, state, CONFIG_DRM_I915_SPIN_REQUEST)) {
dma_fence_signal(&rq->fence);
goto out;

13
drivers/gpu/drm/i915/i915_utils.h
View file

@ -430,4 +430,17 @@ static inline bool timer_expired(const struct timer_list *t)
return READ_ONCE(t->expires) && !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 */